WO2017193673A1 - Automobile exhaust gas purification method - Google Patents

Automobile exhaust gas purification method Download PDF

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WO2017193673A1
WO2017193673A1 PCT/CN2017/074904 CN2017074904W WO2017193673A1 WO 2017193673 A1 WO2017193673 A1 WO 2017193673A1 CN 2017074904 W CN2017074904 W CN 2017074904W WO 2017193673 A1 WO2017193673 A1 WO 2017193673A1
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Prior art keywords
automobile
exhaust gas
purifier
exhaust
pressure value
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French (fr)
Chinese (zh)
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崔翠翠
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/01—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust by means of electric or electrostatic separators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N9/00—Electrical control of exhaust gas treating apparatus
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/40—Engine management systems

Definitions

  • the invention relates to the technical field of automobile exhaust gas control, in particular to a method for purifying automobile exhaust gas.
  • the car exhaust gas purifier installed inside the car can usually absorb the harmful gas once, but when the road surface is uneven, for example, the car engine needs to output a large power. At this time, exhaust gas with a relatively high amount of harmful gas is discharged, and the exhaust gas purifier of the automobile is difficult to absorb the harmful gas in the exhaust gas, thereby causing environmental pollution.
  • nitrogen oxides in automobile exhaust include various compounds such as nitrous oxide (N 2 O), nitrogen monoxide (NO), nitrogen dioxide (NO 2 ), nitrogen trioxide (N 2 O 3 ), etc. .
  • nitrogen dioxide other nitrogen oxides are extremely unstable. When exposed to light, humidity or heat, they become nitrogen dioxide and nitrogen monoxide.
  • Nitric oxide becomes nitrogen dioxide, and nitrogen dioxide is a kind of corrosion.
  • Sexual gas Inhalation of nitrogen dioxide in the early stage will have mild eye and upper respiratory tract irritation, such as pharyngeal discomfort, dry cough, etc., and after a few hours of incubation, chest tightness, respiratory distress, cough, sputum, cyanosis, etc. It may even make people faint.
  • the object of the present invention is to provide a vehicle exhaust gas purification
  • the method can effectively control the content of nitrogen oxides in the automobile exhaust gas, and reduce the pollution of the automobile exhaust gas to the environment and the harm to the human body.
  • the present invention adopts the following technical solutions:
  • a method for purifying automobile exhaust gas includes the following steps:
  • the second purifier valve of the automobile is opened, the exhaust of the automobile is discharged to the second purifier of the automobile, and the nitrogen oxides in the exhaust gas of the automobile are ionized by high-energy electron beam irradiation to realize the exhaust of the automobile.
  • the process of discharging the automobile exhaust to the second purifier of the automobile includes:
  • V is the reference speed
  • r is the rotational speed of the automobile engine
  • C is the nitrogen oxide emission amount
  • T is the current temperature in the second purifier of the automobile
  • P is the exhaust pressure value
  • a is a constant conversion coefficient
  • the automobile exhaust gas purifying method of the present invention determines whether it is necessary to perform secondary treatment on the automobile exhaust gas through the exhaust pressure value at the outlet of the exhaust pipe of the automobile engine and the amount of nitrogen oxide emissions, and if so, passes through the high-energy electron.
  • the way of beam irradiation is to secondarily absorb the automobile exhaust in the second purifier of the automobile. Therefore, the vehicle will not emit excessive nitrogen oxides when it is driven on various road surfaces or when the engine work is different, effectively preventing the automobile exhaust gas from polluting the environment and harming the human body.
  • FIG. 1 is a schematic flow chart of a method for purifying an automobile exhaust gas according to an embodiment of the present invention.
  • a method for purifying an automobile exhaust gas includes the following steps:
  • step S101 the exhaust pressure value at the outlet of the exhaust pipe of the automobile engine is obtained. Since the car produces different power on different roads or when the speed of the car is different, the exhaust pressure at the outlet of the exhaust pipe of the automobile engine is also different. When the exhaust pressure value is different, the content of harmful gases contained in the exhaust gas at the outlet of the exhaust pipe of the engine is also different.
  • Step S102 when the exhaust pressure value reaches a predetermined value, detecting exhaust gas at the outlet of the automobile exhaust gas purifier.
  • the exhaust gas of the automobile exhaust gas purifier outlet is detected, which can effectively reduce the number of times and time of using the equipment used in the process, and prolong the service life of the equipment. .
  • the type and content of the harmful gas contained in the exhaust gas can be separately detected by a plurality of gas detectors.
  • M% the content of all harmful gases in the exhaust gas discharged from the outlet of the automobile exhaust gas purifier per unit time
  • the harmful gas in the automobile exhaust gas is usually discharged after the automobile exhaust gas purifier is absorbed.
  • the pressure value is greater than the predetermined value, there is a possibility that the automobile exhaust exceeds the standard.
  • the predetermined value can be determined after testing according to different engines. For example, by detecting the content of harmful gas in the exhaust gas at the exhaust pipe of the automobile engine exhaust pipe, when the content reaches the maximum value that can be absorbed by the automobile exhaust gas purifier, the exhaust gas at the outlet of the exhaust pipe of the automobile engine at this time can be exhausted.
  • the value of the pressure value For this predetermined value.
  • Step S103 judging whether the nitrogen oxide emission amount in the automobile exhaust exceeds a threshold according to the detected result. If yes, step S104 is performed. Otherwise, the process returns to step S101 or step S102.
  • the threshold can be set to 78 mg/km.
  • Step S104 if the result of the determination in step S103 is YES, the second purifier valve of the automobile is opened, the exhaust of the automobile is discharged to the second purifier of the automobile, and the automobile is irradiated by high energy electron beam irradiation (EBDC).
  • EBDC electron beam irradiation
  • the automobile second purifier is a device specially used for secondary absorption treatment of various harmful gases in the automobile exhaust gas, and can be connected at the exit of the automobile exhaust gas purifier.
  • the second purifier of the automobile may also be filled with a carbon monoxide adsorbent for treating carbon monoxide in the exhaust gas.
  • the carbon monoxide absorbent may be a composition composed of a porous inorganic carrier and a binary complex of a nitride and a copper chloride carried thereon, and the nitride in the composition accounts for 0.45-0.8 molar ratio.
  • the inorganic carrier comprises: porous ceramic, activated carbon or titanium oxide; the nitride is pyridine and Compositions.
  • the process of detecting exhaust gas at the outlet of the automobile exhaust gas purifier may include the following steps:
  • the nitrogen oxide emissions are obtained.
  • automobile exhaust gas usually contains various harmful gases such as carbon monoxide, hydrocarbons, sulfur oxides, and nitrogen oxides.
  • harmful gases such as carbon monoxide, hydrocarbons, sulfur oxides, and nitrogen oxides.
  • Each of these gases has a specific characteristic absorption band and characteristic frequency that is strongly absorbed when the infrared spectrum falls near the characteristic frequency band. Therefore, the infrared spectrum of the corresponding characteristic frequency can be used to detect the components of the harmful gas in the exhaust gas, and the amount of the absorbed external spectrum can detect the content of the corresponding gas.
  • the method before the analyzing the NOx emission amount according to the electrical signal, the method further includes the following steps: sequentially filtering and amplifying the electrical signal.
  • the electrical signal can be filtered and amplified by the filtering circuit and the amplifying circuit respectively. After filtering and amplifying the electrical signal, the accuracy of the electrical signal detection can be effectively improved.
  • the following steps may be further included:
  • the opening time of the second purifier valve of the automobile is controlled according to the delay instruction, and the exhaust pressure value at the outlet of the exhaust pipe of the automobile engine is stopped during the opening time.
  • the predetermined time is generally set to a time of a few seconds, for example 3-5 seconds. If it is determined that the car is driving on a rough mountain road, the opening time of the second purifier valve of the car can be extended, for example, to 5 minutes or 10 minutes.
  • the opening time can be set in advance, and the specific setting process can adopt the prior art, and details are not described herein.
  • the predetermined time, the predetermined value, the set threshold, and the like may be set by using similar means according to actual needs.
  • the process of controlling the opening time of the second purifier valve of the automobile according to the delay instruction may specifically include the following steps:
  • Extracting a time value in the delay instruction is proportional to the exhaust pressure value and the actual number of times;
  • a timer After opening the second purifier valve of the automobile, a timer is turned on, and the second purifier valve of the automobile is turned off when the timer reaches the time value.
  • the method may further include the following steps: generating an alarm instruction, and displaying an alarm identifier at a predetermined position of the automobile dashboard according to the alarm instruction.
  • the nitrogen oxide emission in the exhaust gas can be displayed more intuitively and timely, so that people can overhaul the engine through the alarm and the displayed content, and timely control the nitrogen oxides in the exhaust gas to pollute the environment.
  • the process of discharging the automobile exhaust gas to the second purifier of the automobile may specifically include the following steps:
  • the reference speed is calculated based on the rotational speed, the current temperature, the exhaust pressure value, and the NOx emission amount, and the speed at which the vehicle exhaust is discharged to the second purifier of the automobile is adjusted according to the reference speed.
  • V is the reference speed
  • r is the rotational speed of the automobile engine
  • C is the nitrogen oxide emission amount
  • T is the current temperature in the second purifier of the automobile
  • P is the exhaust pressure value
  • a is a constant conversion coefficient
  • an automobile exhaust gas purifying method determines whether it is necessary to perform secondary treatment on the automobile exhaust gas by using the exhaust gas pressure value at the outlet of the exhaust pipe of the automobile engine and the nitrogen oxide emission amount. If it is, the vehicle exhaust gas is secondarily absorbed in the second purifier of the automobile by means of high-energy electron beam irradiation. Therefore, the vehicle will not emit excessive nitrogen oxides when it is driven on various road surfaces or when the engine work is different, effectively preventing the automobile exhaust gas from polluting the environment and harming the human body.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Treating Waste Gases (AREA)
  • Exhaust Gas Treatment By Means Of Catalyst (AREA)

Abstract

An automobile exhaust gas purification method, comprising: obtaining an exhaust pressure value at an automobile engine exhaust pipe outlet; when the exhaust pressure value reaches a preset value, detecting exhaust gas of an automobile exhaust gas purifier outlet; according to a detection result, determining whether a nitrogen oxide emission amount in the automobile exhaust gas exceeds a threshold value; if yes, opening a valve of an automobile second purifier, discharging the automobile exhaust gas to the automobile second purifier, and ionising nitrogen oxides in the automobile exhaust gas via high energy electron beam irradiation means, so as to implement secondary absorption treatment on the automobile exhaust gas. The method determines whether to perform the secondary treatment on the automobile exhaust gas via the exhaust pressure value and the nitrogen oxide emission amount, and prevents environmental pollution by the exhaust gas.

Description

汽车尾气净化方法Automobile exhaust gas purification method 技术领域Technical field

本发明涉及汽车尾气控制技术领域，具体涉及一种汽车尾气净化方法。The invention relates to the technical field of automobile exhaust gas control, in particular to a method for purifying automobile exhaust gas.

背景技术Background technique

通常汽车在比较平缓的公路上行驶时，汽车内部安装的汽车尾气净化器通常能较好的将有害气体一次吸收完毕，但是在例如山路等路面不平整时，汽车发动机则需要输出较大的功率，此时就会排出有害气体含量比较多的尾气，该汽车尾气净化器则难以将尾气中的有害气体一下吸收完毕，从而会造成对环境污染。Usually, when a car is driving on a relatively gentle road, the car exhaust gas purifier installed inside the car can usually absorb the harmful gas once, but when the road surface is uneven, for example, the car engine needs to output a large power. At this time, exhaust gas with a relatively high amount of harmful gas is discharged, and the exhaust gas purifier of the automobile is difficult to absorb the harmful gas in the exhaust gas, thereby causing environmental pollution.

例如，汽车尾气中的氮氧化物包括多种化合物，如一氧化二氮(N2O)、一氧化氮(NO)、二氧化氮(NO2)、三氧化二氮(N2O3)等。除二氧化氮以外，其他氮氧化物均极不稳定，遇光、湿或热变成二氧化氮及一氧化氮，一氧化氮又变为二氧化氮，而二氧化氮是一种具有腐蚀性的气体。吸入二氧化氮气体初期便会有轻微的眼及上呼吸道刺激症状，如咽部不适、干咳等，且经过数小时潜伏期后则会发生胸闷、呼吸窘迫、咳嗽、咯泡沫痰、紫绀等，重者甚至可能会使人昏厥。For example, nitrogen oxides in automobile exhaust include various compounds such as nitrous oxide (N 2 O), nitrogen monoxide (NO), nitrogen dioxide (NO 2 ), nitrogen trioxide (N 2 O 3 ), etc. . Except for nitrogen dioxide, other nitrogen oxides are extremely unstable. When exposed to light, humidity or heat, they become nitrogen dioxide and nitrogen monoxide. Nitric oxide becomes nitrogen dioxide, and nitrogen dioxide is a kind of corrosion. Sexual gas. Inhalation of nitrogen dioxide in the early stage will have mild eye and upper respiratory tract irritation, such as pharyngeal discomfort, dry cough, etc., and after a few hours of incubation, chest tightness, respiratory distress, cough, sputum, cyanosis, etc. It may even make people faint.

因此，如何对汽车尾气中的氮氧化物进行及时处理，成为亟待解决的问题。Therefore, how to timely treat the nitrogen oxides in the automobile exhaust gas has become an urgent problem to be solved.

发明内容Summary of the invention

针对现有技术的不足，本发明的目的在于提供一种汽车尾气净化 方法，能够有效地控制汽车尾气中氮氧化物的含量，降低汽车尾气对环境的污染和对人体的伤害。In view of the deficiencies of the prior art, the object of the present invention is to provide a vehicle exhaust gas purification The method can effectively control the content of nitrogen oxides in the automobile exhaust gas, and reduce the pollution of the automobile exhaust gas to the environment and the harm to the human body.

为实现上述目的，本发明采用如下技术方案：To achieve the above object, the present invention adopts the following technical solutions:

一种汽车尾气净化方法，包括如下步骤：A method for purifying automobile exhaust gas includes the following steps:

获取汽车发动机排气管出口处的排气压力值；Obtaining the exhaust pressure value at the outlet of the exhaust pipe of the automobile engine;

当所述排气压力值达到预定值时，对汽车尾气净化器出口的尾气进行检测；When the exhaust pressure value reaches a predetermined value, detecting exhaust gas at an outlet of the automobile exhaust gas purifier;

根据检测的结果判断汽车尾气中的氮氧化物排放量是否超过阈值；According to the test result, it is judged whether the nitrogen oxide emission in the automobile exhaust exceeds the threshold;

若是，则将汽车第二净化器阀门打开，将所述汽车尾气排放到所述汽车第二净化器，并通过高能电子束照射的方式将汽车尾气中的氮氧化物电离，以实现对汽车尾气的二次吸收处理If yes, the second purifier valve of the automobile is opened, the exhaust of the automobile is discharged to the second purifier of the automobile, and the nitrogen oxides in the exhaust gas of the automobile are ionized by high-energy electron beam irradiation to realize the exhaust of the automobile. Secondary absorption treatment

；;

在所述获取对汽车发动机排气管出口处的排气压力值步骤之后，还包括以下步骤：After the step of obtaining the exhaust pressure value at the outlet of the exhaust pipe of the automobile engine, the following steps are further included:

获取所述排气压力值在预定时间内大于或等于预定值的实际次数；Obtaining an actual number of times that the exhaust pressure value is greater than or equal to a predetermined value within a predetermined time;

判断所述实际次数是否大于或等于设定阈值；Determining whether the actual number of times is greater than or equal to a set threshold;

若是，则发送延长打开所述汽车第二净化器阀门的延时指令；If yes, sending a delay instruction to extend the opening of the second purifier valve of the automobile;

根据所述延时指令控制所述汽车第二净化器阀门的打开时间，并在该打开时间内停止获取汽车发动机排气管出口处的排气压力值；Controlling an opening time of the second purifier valve of the automobile according to the delay instruction, and stopping acquiring an exhaust pressure value at an outlet of the exhaust pipe of the automobile engine during the opening time;

将所述汽车尾气排放到所述汽车第二净化器的过程包括： The process of discharging the automobile exhaust to the second purifier of the automobile includes:

实时获取汽车发动机的转速以及所述汽车第二净化器中的当前温度；Acquiring the rotational speed of the automobile engine and the current temperature in the second purifier of the automobile in real time;

根据转速、当前温度、排气压力值以及氮氧化物排放量计算出参考速度，并根据所述参考速度来调节汽车尾气排放到所述汽车第二净化器中的速度；Calculating a reference speed according to the rotational speed, the current temperature, the exhaust pressure value, and the nitrogen oxide emission amount, and adjusting a speed at which the automobile exhaust gas is discharged into the second purifier of the automobile according to the reference speed;

采用如下公式来计算参考速度：Use the following formula to calculate the reference speed:

Figure PCTCN2017074904-appb-000001
Figure PCTCN2017074904-appb-000001

上式中，V为参考速度；r为汽车发动机的转速，C为氮氧化物排放量，T为汽车第二净化器中的当前温度，P为排气压力值，a为常数转换系数，介于0.25-0.49之间。In the above formula, V is the reference speed; r is the rotational speed of the automobile engine, C is the nitrogen oxide emission amount, T is the current temperature in the second purifier of the automobile, P is the exhaust pressure value, and a is a constant conversion coefficient, Between 0.25 and 0.49.

与现有技术相比，本发明的汽车尾气净化方法通过汽车发动机排气管出口处的排气压力值及氮氧化物排放量来判断是否需要对汽车尾气进行二次处理，若是则通过高能电子束照射的方式在汽车第二净化器中对汽车尾气进行二次吸收。从而使得汽车行驶在各种环境的路面上或者发动机做功不同的情况下均不会有排放超标的氮氧化物，有效的防止汽车尾气对环境的污染和对人体的伤害。Compared with the prior art, the automobile exhaust gas purifying method of the present invention determines whether it is necessary to perform secondary treatment on the automobile exhaust gas through the exhaust pressure value at the outlet of the exhaust pipe of the automobile engine and the amount of nitrogen oxide emissions, and if so, passes through the high-energy electron. The way of beam irradiation is to secondarily absorb the automobile exhaust in the second purifier of the automobile. Therefore, the vehicle will not emit excessive nitrogen oxides when it is driven on various road surfaces or when the engine work is different, effectively preventing the automobile exhaust gas from polluting the environment and harming the human body.

附图说明DRAWINGS

图1为本发明的实施例中一种汽车尾气净化方法的流程示意图。1 is a schematic flow chart of a method for purifying an automobile exhaust gas according to an embodiment of the present invention.

具体实施方式detailed description

下面，结合附图以及具体实施方式，对本发明做进一步描述： The present invention will be further described below in conjunction with the drawings and specific embodiments.

参照图1，本发明所提供的一种汽车尾气净化方法，包括如下步骤：Referring to FIG. 1, a method for purifying an automobile exhaust gas provided by the present invention includes the following steps:

步骤S101，获取汽车发动机排气管出口处的排气压力值。由于汽车在不同道路上行驶或者汽车时速不同时汽车发动机所产生功率不同，从而使得汽车发动机排气管出口处的排气压力值也不同。该排气压力值不同时通常发动机排气管出口处的尾气中所包含有害气体的含量也不相同。In step S101, the exhaust pressure value at the outlet of the exhaust pipe of the automobile engine is obtained. Since the car produces different power on different roads or when the speed of the car is different, the exhaust pressure at the outlet of the exhaust pipe of the automobile engine is also different. When the exhaust pressure value is different, the content of harmful gases contained in the exhaust gas at the outlet of the exhaust pipe of the engine is also different.

步骤S102，当所述排气压力值达到预定值时，对汽车尾气净化器出口的尾气进行检测。Step S102, when the exhaust pressure value reaches a predetermined value, detecting exhaust gas at the outlet of the automobile exhaust gas purifier.

本发明实施例中，只有当排气压力值达到预定值才对汽车尾气净化器出口的尾气进行检测，可以有效的降低完成该过程所述使用设备的使用次数和时间，延长该设备的使用寿命。In the embodiment of the present invention, only when the exhaust gas pressure value reaches a predetermined value, the exhaust gas of the automobile exhaust gas purifier outlet is detected, which can effectively reduce the number of times and time of using the equipment used in the process, and prolong the service life of the equipment. .

在其中一个实施例中，可通过多个气体检测器来分别检测出尾气中包含有害气体的种类及含量。当单位时间内汽车尾气净化器出口排出的尾气中所有害气体的含量占总尾气量大于或等于M％时则说明害气体超标。该M为正数，其可根据实际需要进行设定。In one of the embodiments, the type and content of the harmful gas contained in the exhaust gas can be separately detected by a plurality of gas detectors. When the content of all harmful gases in the exhaust gas discharged from the outlet of the automobile exhaust gas purifier per unit time is greater than or equal to M%, the harmful gas exceeds the standard. This M is a positive number, which can be set according to actual needs.

由于排气压力值小于预定值时，汽车尾气中的有害气体通常会在汽车尾气净化器吸收完毕之后排放出去。但是当该压力值大于预定值时则有可能会出现汽车尾气超标的情况。该预定值可根据不同发动机进行测试之后确定。例如通过对汽车发动机排气管出口处的尾气含有有害气体的含量进行检测，当该含量达到汽车尾气净化器所能吸收的最大值时，可将此时汽车发动机排气管出口处的排气压力值的大小设 为该预定值。Since the exhaust gas pressure value is less than the predetermined value, the harmful gas in the automobile exhaust gas is usually discharged after the automobile exhaust gas purifier is absorbed. However, when the pressure value is greater than the predetermined value, there is a possibility that the automobile exhaust exceeds the standard. The predetermined value can be determined after testing according to different engines. For example, by detecting the content of harmful gas in the exhaust gas at the exhaust pipe of the automobile engine exhaust pipe, when the content reaches the maximum value that can be absorbed by the automobile exhaust gas purifier, the exhaust gas at the outlet of the exhaust pipe of the automobile engine at this time can be exhausted. The value of the pressure value For this predetermined value.

步骤S103，根据检测的结果判断汽车尾气中的氮氧化物排放量是否超过阈值。若是则执行步骤S104。否则返回执行步骤S101或者步骤S102。Step S103, judging whether the nitrogen oxide emission amount in the automobile exhaust exceeds a threshold according to the detected result. If yes, step S104 is performed. Otherwise, the process returns to step S101 or step S102.

在其中一个实施例中，所述阈值可以设置为78毫克/公里。In one of these embodiments, the threshold can be set to 78 mg/km.

步骤S104，若步骤S103的判断结果为是，则将汽车第二净化器阀门打开，将所述汽车尾气排放到所述汽车第二净化器，并通过高能电子束照射的方式(EBDC)将汽车尾气中的氮氧化物电离，以实现对汽车尾气的二次吸收处理。Step S104, if the result of the determination in step S103 is YES, the second purifier valve of the automobile is opened, the exhaust of the automobile is discharged to the second purifier of the automobile, and the automobile is irradiated by high energy electron beam irradiation (EBDC). The nitrogen oxides in the exhaust gas are ionized to achieve secondary absorption treatment of the automobile exhaust.

本发明实施例中，汽车第二净化器是专门用来对汽车尾气中的各种有害气体进行二次吸收处理的一个装置，可以连接在汽车尾气净化器出口之处。在其中一个实施例中，所述汽车第二净化器内还可以填充有一氧化碳吸附剂，以用于处理尾气中的一氧化碳。具体的，所述一氧化碳吸收剂可以为由多孔无机载体和其上所载有的氮化物和氯化铜的二元配合物构成的组合物，且该组合物中氮化物占0.45-0.8摩尔比；所述无机载体包括：多孔陶瓷、活性炭或者氧化钛；所述氮化物为吡啶及

Figure PCTCN2017074904-appb-000002
的组合物。In the embodiment of the present invention, the automobile second purifier is a device specially used for secondary absorption treatment of various harmful gases in the automobile exhaust gas, and can be connected at the exit of the automobile exhaust gas purifier. In one embodiment, the second purifier of the automobile may also be filled with a carbon monoxide adsorbent for treating carbon monoxide in the exhaust gas. Specifically, the carbon monoxide absorbent may be a composition composed of a porous inorganic carrier and a binary complex of a nitride and a copper chloride carried thereon, and the nitride in the composition accounts for 0.45-0.8 molar ratio. The inorganic carrier comprises: porous ceramic, activated carbon or titanium oxide; the nitride is pyridine and
Figure PCTCN2017074904-appb-000002
Compositions.

在另外一个实施例中，所述对汽车尾气净化器出口的尾气进行检测的过程可以包括如下步骤：In another embodiment, the process of detecting exhaust gas at the outlet of the automobile exhaust gas purifier may include the following steps:

通过红外线检测的方式对尾气进行实时检测； Real-time detection of exhaust gas by means of infrared detection;

根据被吸收的红外线的波长范围及被吸收的程度，生成相应的电信号；Generating a corresponding electrical signal according to the wavelength range of the absorbed infrared light and the degree of absorption;

根据该电信号分析得出氮氧化物排放量。According to the electrical signal analysis, the nitrogen oxide emissions are obtained.

由于汽车尾气中通常包含有一氧化碳、碳氢化合物、硫氧化合物、氮氧化合物等各种有害气体。而这些气体中每种气体具有特定的特征吸收谱带与特征频率，当红外光谱落在特征频率带附近的时候会被强烈的吸收。所以可通过相应特征频率的红外光谱来检测尾气中有害气体的成分，及被吸收的外光谱的量可以检测出相应气体的含量。Since automobile exhaust gas usually contains various harmful gases such as carbon monoxide, hydrocarbons, sulfur oxides, and nitrogen oxides. Each of these gases has a specific characteristic absorption band and characteristic frequency that is strongly absorbed when the infrared spectrum falls near the characteristic frequency band. Therefore, the infrared spectrum of the corresponding characteristic frequency can be used to detect the components of the harmful gas in the exhaust gas, and the amount of the absorbed external spectrum can detect the content of the corresponding gas.

作为优选的实施例，在所述根据该电信号分析得出氮氧化物排放量之前，还可以包括如下步骤：将所述电信号依次进行滤波及放大处理。具体可分别通过滤波电路及放大电路对电信号进行滤波及放大处理。经过滤波及放大处理后的电信号，可以有效的提高电信号检测的准确度。As a preferred embodiment, before the analyzing the NOx emission amount according to the electrical signal, the method further includes the following steps: sequentially filtering and amplifying the electrical signal. Specifically, the electrical signal can be filtered and amplified by the filtering circuit and the amplifying circuit respectively. After filtering and amplifying the electrical signal, the accuracy of the electrical signal detection can be effectively improved.

作为优选的实施例，在所述获取对汽车发动机排气管出口处的排气压力值步骤之后，还可以包括以下步骤：As a preferred embodiment, after the step of obtaining the exhaust pressure value at the outlet of the exhaust pipe of the automobile engine, the following steps may be further included:

获取所述排气压力值在预定时间内大于或等于预定值的实际次数；Obtaining an actual number of times that the exhaust pressure value is greater than or equal to a predetermined value within a predetermined time;

判断所述实际次数是否大于或等于设定阈值；Determining whether the actual number of times is greater than or equal to a set threshold;

若是，则发送延长打开所述汽车第二净化器阀门的延时指令；If yes, sending a delay instruction to extend the opening of the second purifier valve of the automobile;

根据所述延时指令控制所述汽车第二净化器阀门的打开时间，并在该打开时间内停止获取汽车发动机排气管出口处的排气压力值。The opening time of the second purifier valve of the automobile is controlled according to the delay instruction, and the exhaust pressure value at the outlet of the exhaust pipe of the automobile engine is stopped during the opening time.

本发明实施例中，当在预定时间内所述排气压力值大于或等于所 述预定值的实际次数达到一个设定阈值时，则自动判定汽车行驶在坎坷崎岖的山路上，否则自动判定汽车行驶在平坦的公路上。该预定时间一般设为几秒钟的时间，例如3-5秒钟。若通过判定汽车是行驶在坎坷崎岖的山路上，则可以延长汽车第二净化器阀门的打开时间，例如延长至5分钟或者10分钟等。该打开的时间可以预先进行设定，具体设定的过程可采用现有技术，此处不予赘述。同理所述预定时间、预定值、设定阈值等均可根据实际需要采用相类似的手段进行设定。In the embodiment of the present invention, when the exhaust pressure value is greater than or equal to the predetermined time When the actual number of predetermined values reaches a set threshold, it is automatically determined that the car is traveling on a rough mountain road, otherwise the car is automatically determined to be traveling on a flat road. The predetermined time is generally set to a time of a few seconds, for example 3-5 seconds. If it is determined that the car is driving on a rough mountain road, the opening time of the second purifier valve of the car can be extended, for example, to 5 minutes or 10 minutes. The opening time can be set in advance, and the specific setting process can adopt the prior art, and details are not described herein. Similarly, the predetermined time, the predetermined value, the set threshold, and the like may be set by using similar means according to actual needs.

作为一个较好的实施例，根据所述延时指令控制所述汽车第二净化器阀门的打开时间的过程具体可以包括如下步骤：As a preferred embodiment, the process of controlling the opening time of the second purifier valve of the automobile according to the delay instruction may specifically include the following steps:

提取所述延时指令中的时间值；所述时间值与所述排气压力值以及所述实际次数成正比关系；Extracting a time value in the delay instruction; the time value is proportional to the exhaust pressure value and the actual number of times;

在打开所述汽车第二净化器阀门后，开启一个定时器，在该定时器到达所述时间值时关闭所述汽车第二净化器阀门。After opening the second purifier valve of the automobile, a timer is turned on, and the second purifier valve of the automobile is turned off when the timer reaches the time value.

作为优选的实施例，在判断得出汽车尾气中的氮氧化物排放量超过阈值之后，还可以包括如下步骤：生成报警指令，根据该报警指令在汽车仪表盘的预定位置显示报警标识。通过报警及显示，可以使得尾气中氮氧化物排放量更直观及时地展示，便于人们通过该报警及显示的内容对发动机进行检修，及时控制尾气中的氮氧化物污染环境。As a preferred embodiment, after determining that the nitrogen oxide emission amount in the automobile exhaust exceeds the threshold value, the method may further include the following steps: generating an alarm instruction, and displaying an alarm identifier at a predetermined position of the automobile dashboard according to the alarm instruction. Through the alarm and display, the nitrogen oxide emission in the exhaust gas can be displayed more intuitively and timely, so that people can overhaul the engine through the alarm and the displayed content, and timely control the nitrogen oxides in the exhaust gas to pollute the environment.

作为一个较好的实施例，将所述汽车尾气排放到所述汽车第二净化器的过程具体可以包括如下步骤：As a preferred embodiment, the process of discharging the automobile exhaust gas to the second purifier of the automobile may specifically include the following steps:

实时获取汽车发动机的转速以及所述汽车第二净化器中的当前温度； Acquiring the rotational speed of the automobile engine and the current temperature in the second purifier of the automobile in real time;

根据转速、当前温度、排气压力值以及氮氧化物排放量计算出参考速度，并根据所述参考速度来调节汽车尾气排放到所述汽车第二净化器的速度。The reference speed is calculated based on the rotational speed, the current temperature, the exhaust pressure value, and the NOx emission amount, and the speed at which the vehicle exhaust is discharged to the second purifier of the automobile is adjusted according to the reference speed.

本实施例中，可以采用如下公式来计算参考速度：In this embodiment, the following formula can be used to calculate the reference speed:

Figure PCTCN2017074904-appb-000003
Figure PCTCN2017074904-appb-000003

上式中，V为参考速度；r为汽车发动机的转速，C为氮氧化物排放量，T为汽车第二净化器中的当前温度，P为排气压力值，a为常数转换系数，介于0.25-0.49之间。通过控制尾气排放到汽车第二净化器中的速度，使得氮氧化物能够在汽车第二净化器中被更完全的吸收，从而可以有效提高尾气处理的效率。特别的，经过大量的实验数据证明，当a的值取为0.33时，氮氧化物处理的效率最佳。In the above formula, V is the reference speed; r is the rotational speed of the automobile engine, C is the nitrogen oxide emission amount, T is the current temperature in the second purifier of the automobile, P is the exhaust pressure value, and a is a constant conversion coefficient, Between 0.25 and 0.49. By controlling the rate at which the exhaust gas is discharged into the second purifier of the automobile, the nitrogen oxides can be more completely absorbed in the second purifier of the automobile, so that the efficiency of the exhaust gas treatment can be effectively improved. In particular, after a large amount of experimental data, the efficiency of nitrogen oxide treatment is optimal when the value of a is 0.33.

通过以上方案可以看出，本发明实施例的一种汽车尾气净化方法，通过汽车发动机排气管出口处的排气压力值及氮氧化物排放量来判断是否需要对汽车尾气进行二次处理，若是则通过高能电子束照射的方式在汽车第二净化器中对汽车尾气进行二次吸收。从而使得汽车行驶在各种环境的路面上或者发动机做功不同的情况下均不会有排放超标的氮氧化物，有效的防止汽车尾气对环境的污染和对人体的伤害。It can be seen from the above solution that an automobile exhaust gas purifying method according to an embodiment of the present invention determines whether it is necessary to perform secondary treatment on the automobile exhaust gas by using the exhaust gas pressure value at the outlet of the exhaust pipe of the automobile engine and the nitrogen oxide emission amount. If it is, the vehicle exhaust gas is secondarily absorbed in the second purifier of the automobile by means of high-energy electron beam irradiation. Therefore, the vehicle will not emit excessive nitrogen oxides when it is driven on various road surfaces or when the engine work is different, effectively preventing the automobile exhaust gas from polluting the environment and harming the human body.

对本领域的技术人员来说，可根据以上描述的技术方案以及构思，做出其它各种相应的改变以及形变，而所有的这些改变以及形变都应该属于本发明权利要求的保护范围之内。 Various other changes and modifications may be made by those skilled in the art in light of the above-described technical solutions and concepts, and all such changes and modifications are intended to fall within the scope of the appended claims.

Claims (7)

一种汽车尾气净化方法，其特征在于，包括如下步骤：A method for purifying an automobile exhaust gas, comprising the steps of: 获取汽车发动机排气管出口处的排气压力值；Obtaining the exhaust pressure value at the outlet of the exhaust pipe of the automobile engine; 当所述排气压力值达到预定值时，对汽车尾气净化器出口的尾气进行检测；When the exhaust pressure value reaches a predetermined value, detecting exhaust gas at an outlet of the automobile exhaust gas purifier; 根据检测的结果判断汽车尾气中的氮氧化物排放量是否超过阈值；According to the test result, it is judged whether the nitrogen oxide emission in the automobile exhaust exceeds the threshold; 若是，则将汽车第二净化器阀门打开，将所述汽车尾气排放到所述汽车第二净化器，并通过高能电子束照射的方式将汽车尾气中的氮氧化物电离，以实现对汽车尾气的二次吸收处理；If yes, the second purifier valve of the automobile is opened, the exhaust of the automobile is discharged to the second purifier of the automobile, and the nitrogen oxides in the exhaust gas of the automobile are ionized by high-energy electron beam irradiation to realize the exhaust of the automobile. Secondary absorption treatment; 在所述获取对汽车发动机排气管出口处的排气压力值步骤之后，还包括以下步骤：After the step of obtaining the exhaust pressure value at the outlet of the exhaust pipe of the automobile engine, the following steps are further included: 获取所述排气压力值在预定时间内大于或等于预定值的实际次数；Obtaining an actual number of times that the exhaust pressure value is greater than or equal to a predetermined value within a predetermined time; 判断所述实际次数是否大于或等于设定阈值；Determining whether the actual number of times is greater than or equal to a set threshold; 若是，则发送延长打开所述汽车第二净化器阀门的延时指令；If yes, sending a delay instruction to extend the opening of the second purifier valve of the automobile; 根据所述延时指令控制所述汽车第二净化器阀门的打开时间，并在该打开时间内停止获取汽车发动机排气管出口处的排气压力值；Controlling an opening time of the second purifier valve of the automobile according to the delay instruction, and stopping acquiring an exhaust pressure value at an outlet of the exhaust pipe of the automobile engine during the opening time; 将所述汽车尾气排放到所述汽车第二净化器的过程包括：The process of discharging the automobile exhaust to the second purifier of the automobile includes: 实时获取汽车发动机的转速以及所述汽车第二净化器中的当前温度；Acquiring the rotational speed of the automobile engine and the current temperature in the second purifier of the automobile in real time; 根据转速、当前温度、排气压力值以及氮氧化物排放量计算出参考速度，并根据所述参考速度来调节汽车尾气排放到所述汽车第二净 化器中的速度；Calculating a reference speed based on the rotational speed, current temperature, exhaust pressure value, and nitrogen oxide emission amount, and adjusting vehicle exhaust emissions to the second net of the vehicle according to the reference speed Speed in the chemist 采用如下公式来计算参考速度：Use the following formula to calculate the reference speed:
Figure PCTCN2017074904-appb-100001
Figure PCTCN2017074904-appb-100001
 上式中，V为参考速度；r为汽车发动机的转速，C为氮氧化物排放量，T为汽车第二净化器中的当前温度，P为排气压力值，a为常数转换系数，介于0.25-0.49之间。In the above formula, V is the reference speed; r is the rotational speed of the automobile engine, C is the nitrogen oxide emission amount, T is the current temperature in the second purifier of the automobile, P is the exhaust pressure value, and a is a constant conversion coefficient, Between 0.25 and 0.49. 根据权利要求1所述的汽车尾气净化方法，其特征在于，所述阈值为78毫克/公里。The automobile exhaust gas purifying method according to claim 1, wherein said threshold value is 78 mg/km. 根据权利要求1所述的汽车尾气净化方法，其特征在于，所述对汽车尾气净化器出口的尾气进行检测的过程包括：The automobile exhaust gas purification method according to claim 1, wherein the process of detecting the exhaust gas at the outlet of the automobile exhaust gas purifier comprises: 通过红外线检测的方式对汽车尾气净化器出口的尾气进行检测；Exhaust gas at the outlet of the automobile exhaust gas purifier is detected by means of infrared detection; 根据被吸收的红外线的波长范围及被吸收的程度，生成相应的电信号；Generating a corresponding electrical signal according to the wavelength range of the absorbed infrared light and the degree of absorption; 根据该电信号分析得出氮氧化物排放量。According to the electrical signal analysis, the nitrogen oxide emissions are obtained. 根据权利要求3所述的汽车尾气净化方法，其特征在于，在所述根据该电信号分析得出氮氧化物排放量之前，还包括步骤：将所述电信号依次进行滤波及放大处理。The method for purifying automobile exhaust gas according to claim 3, further comprising the step of: sequentially filtering and amplifying the electrical signal before the analyzing the amount of nitrogen oxide emissions according to the electrical signal. 根据权利要求1所述的汽车尾气净化方法，其特征在于，根据所述延时指令控制所述汽车第二净化器阀门的打开时间的过程包括： The automobile exhaust gas purifying method according to claim 1, wherein the controlling the opening time of the second purifier valve of the automobile according to the delay command comprises: 提取所述延时指令中的时间值；所述时间值与所述排气压力值以及所述实际次数成正比关系；Extracting a time value in the delay instruction; the time value is proportional to the exhaust pressure value and the actual number of times; 在打开所述汽车第二净化器阀门后，开启一个定时器，在该定时器到达所述时间值时关闭所述汽车第二净化器阀门。After opening the second purifier valve of the automobile, a timer is turned on, and the second purifier valve of the automobile is turned off when the timer reaches the time value. 根据权利要求1所述的汽车尾气净化方法，其特征在于，在判断得出汽车尾气中的氮氧化物排放量超过阈值之后，还包括如下步骤：The method for purifying an automobile exhaust gas according to claim 1, wherein after determining that the amount of nitrogen oxides emitted from the automobile exhaust exceeds a threshold, the method further comprises the steps of: 生成报警指令，根据该报警指令在汽车仪表盘的预定位置显示报警标识。An alarm command is generated, and an alarm flag is displayed at a predetermined position of the car dashboard according to the alarm command. 根据权利要求1所述的汽车尾气净化方法，其特征在于，所述汽车第二净化器内还填充有一氧化碳吸附剂；所述一氧化碳吸收剂为由多孔无机载体和其上所载有的氮化物和氯化铜的二元配合物构成的组合物，且该组合物中氮化物占0.45-0.8摩尔比；所述无机载体包括：多孔陶瓷、活性炭或者氧化钛；所述氮化物为吡啶及
Figure PCTCN2017074904-appb-100002
的组合物。 The method for purifying an automobile exhaust gas according to claim 1, wherein said second purifier of said automobile is further filled with a carbon oxide adsorbent; said carbon monoxide absorbent is composed of a porous inorganic carrier and a nitride carried thereon a composition comprising a binary complex of copper chloride, wherein the nitride comprises 0.45-0.8 molar ratio; the inorganic carrier comprises: porous ceramic, activated carbon or titanium oxide; the nitride is pyridine and
Figure PCTCN2017074904-appb-100002
Compositions.
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US10947896B1 (en) 2020-05-29 2021-03-16 Philip Owen Jung Internal cleaning of an internal combustion engine after-treatment system

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CN110552760A (en) * 2019-07-24 2019-12-10 扬州工业职业技术学院 Automobile exhaust detection and purification method
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US10947896B1 (en) 2020-05-29 2021-03-16 Philip Owen Jung Internal cleaning of an internal combustion engine after-treatment system
US10947895B1 (en) 2020-05-29 2021-03-16 Philip Owen Jung Internal cleaning of an internal combustion engine and its after-treatment system
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