WO2004094798A1 - 内燃機関の吸気装置及び制御装置 - Google Patents
内燃機関の吸気装置及び制御装置 Download PDFInfo
- Publication number
- WO2004094798A1 WO2004094798A1 PCT/JP2004/005564 JP2004005564W WO2004094798A1 WO 2004094798 A1 WO2004094798 A1 WO 2004094798A1 JP 2004005564 W JP2004005564 W JP 2004005564W WO 2004094798 A1 WO2004094798 A1 WO 2004094798A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- air
- intake
- cylinder
- amount
- air flow
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/0002—Controlling intake air
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/008—Controlling each cylinder individually
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/18—Circuit arrangements for generating control signals by measuring intake air flow
- F02D41/182—Circuit arrangements for generating control signals by measuring intake air flow for the control of a fuel injection device
-
- 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 present invention relates to an intake device for a fuel injection type internal combustion engine having an intake passage and a throttle body for each cylinder, and a control device for controlling fuel injection.
- a throttle valve (throttle valve) is provided upstream of an intake manifold ('intake passage), and a fuel injection valve and an air flow sensor are provided downstream of the throttle valve. Some of them are provided (for example, see Japanese Patent Publication No. Hei 11-51888).
- An intake air amount signal output by the air flow sensor is input to a control circuit, and a fuel injection amount according to an operation state of the internal combustion engine is calculated. Then, a fuel injection amount signal based on the calculated fuel injection amount is output from the control circuit to control the operation of the fuel injection valve.
- the present invention has been made in view of the above circumstances, and has an intake passage and a slot for each cylinder.
- An object of the present invention is to achieve high responsiveness and optimal fuel injection while suppressing the number of parts in an intake device and a control device of an internal combustion engine having a reporty. Disclosure of the invention
- the present invention is an intake device for an internal combustion engine, comprising: a plurality of intake passages individually provided in each cylinder of a multi-cylinder internal combustion engine; and a throttle body provided in each of the plurality of intake passages.
- an intake device for an internal combustion engine in which an air flow sensor for measuring an amount of air taken into a cylinder corresponding to the intake passage is provided in a part of the intake passage.
- the present invention provides a control device for an internal combustion engine, comprising: a plurality of intake passages individually provided in each cylinder of a multi-cylinder internal combustion engine; and a throttle body provided in each of the plurality of intake passages.
- An air flow sensor that is provided in a part of the intake passage and measures the amount of air taken into a cylinder corresponding to the intake passage; and an air flow sensor that multiplies the amount of air measured by the air flow sensor by a predetermined coefficient and And a controller for calculating an amount of air sucked into the cylinder and calculating a fuel injection amount to each cylinder to output a signal to a fuel injection device of the internal combustion engine.
- the amount of intake air is directly measured in a cylinder corresponding to an intake passage provided with an air flow sensor (cylinder with an air flow sensor), and the intake air is measured in other cylinders.
- an air flow sensor cylinder with an air flow sensor
- the intake air is measured in other cylinders.
- a part of the plurality of intake passages indicates one or more intake passages.
- the air amount measured by the air flow sensor is multiplied by a predetermined coefficient to calculate the amount of air to be taken into a cylinder other than the cylinder in which the air flow sensor is installed. It is possible to calculate the fuel injection amount to each cylinder from the measurement value of the flow sensor and output a signal to the fuel injection device.
- the air flow rate measured by the air flow sensor changes to the throttle valve opening or the engine speed.
- an estimated value of the amount of air drawn into cylinders other than the cylinder with the air flow sensor is calculated. be able to.
- the responsiveness of the internal combustion engine can be improved without controlling fuel injection based only on the throttle valve opening and the engine speed. It is possible to increase. That is, even when the throttle valve opening is large, fuel injection can be performed every time based on the air amount measured by the air flow sensor and the air amount estimated from this.
- FIG. 1 is a configuration diagram of an internal combustion engine according to an embodiment of the present invention.
- FIG. 2 is an explanatory diagram showing an intake passage of an engine and an arrangement of an air flow sensor.
- Figure 3 is a graph showing the change over time of the throttle valve opening and the intake air volume of each cylinder.
- an engine (internal combustion engine) 1 has a plurality of cylinders in an engine body 2, a piston 4 reciprocates, and changes the volume in the cylinder 3 to change intake, compression, combustion (expansion), and exhaust air. Repeat each process.
- An intake pipe 6 is connected to an external opening of an intake port 5 corresponding to each cylinder of the engine body 2, and upstream of the intake pipe 6 in an intake direction, air taken into the engine 1 is provided.
- a throttle body 10 having a throttle valve 9 for adjusting the amount (intake amount) is connected.
- a funnel 7 for rectifying the air flow is connected to the upstream side of each throttle body, and is provided for each cylinder of the engine 1 by these intake pipes 6, the throttle body 10 and the funnel 7.
- a plurality of intake passages 8 are configured.
- the upstream side of each funnel 7 is connected to the air cleaner case 11, and the intake duct 12 is connected to the upstream side of the air cleaner case 11.
- the engine body 2 is provided with an injector (combustion injection device) 14 for each cylinder, which faces an electromagnetic fuel injection valve in the intake port 5. A predetermined amount of fuel is injected into the air flow in the intake port 5.
- Each injector 14 is supplied with fuel pumped from a fuel tank 15 by a fuel pump 16 and regulated by a regulator 17.
- the engine body 2 also includes an intake valve 18 for opening and closing the combustion chamber side opening of the intake port 5, an exhaust valve 20 for opening and closing the combustion chamber side opening of the exhaust port 19, and a firing electrode section in the combustion chamber.
- a spark plug 21 is provided for each cylinder. Ignition of the ignition plug 21 is performed by using high energy stored in the ignition circuit 22, and opening and closing operations of the intake valve 18 and the exhaust valve 20 are performed by a camshaft (not shown).
- An exhaust manifold 23 is connected to the outside opening of each exhaust port 19.
- Each piston 4 is connected to a crankpin of a crankshaft 25 via a connecting rod 24.
- the control circuit (control unit) 26 controls the fuel injection amount, the fuel injection timing, and the ignition timing of the air-fuel mixture in the operating state of the engine 1.
- the control circuit 26 is a so-called ECU (E1 etronic Control Unit), has a CPU (Central Processing Unit), a ROM (Rad Only Memory), and the like. Operates with power supply.
- the control circuit 26 detects the output from an air flow meter (air flow sensor) 28 that can detect the amount of air taken into the engine 1 as a mass flow rate, the throttle valve opening sensor 29, and the crankshaft rotation angle sensor 30. A predetermined process is performed using the output of the device as input data, and a command signal is output to each unit.
- an air flow meter 28 suitable for this embodiment, there is a sensor that deposits a platinum thin film on a silicon substrate and energizes the platinum thin film so as to keep its temperature constant. As the mass of air flowing around the platinum thin film increases, the temperature of the platinum thin film decreases, so that the air flow meter 28 increases the current flowing through the platinum thin film so as to keep the temperature constant. On the other hand, if the mass of the air flowing around the platinum thin film decreases, the temperature of the platinum thin film increases, so that the air flow 28 decreases the current flowing through the platinum thin film. As described above, since the current value increases and decreases in proportion to the increase and decrease of the mass of the air flowing around the platinum thin film, the air flow rate can be measured by monitoring the current value.
- a plurality of (four in this embodiment) intake passages 8 each having a throttle body 10 are provided with left and right air passages so as to correspond to each cylinder (cylinder 3 and biston 4) of the engine 1. They are arranged side by side in the direction.
- the airflow passage 28 is provided in one of the intake passages 8 located on the rightmost side.
- the airflow passage 28 is attached to the funnel 7.
- the air flow meter 28 is located upstream of the throttle valve 9.
- Cylinder # 1 the cylinder with airflow meter installed is cylinder # 1
- the cylinder that takes in air after cylinder # 1 is cylinder # 2.
- the amount of air is calculated from the output current of the air flow meter 28. This shows the converted value, and the amount of air taken into cylinders # 2, 3, and 4 shows the value calculated by the control circuit 26.
- the air amount in the region where the air amount exceeds the predetermined reference value and increases The total sum is defined as the amount of air G air 1, 2, 3, 4 taken into each cylinder # 1, 2, 3, 4 in one intake stroke.
- the throttle valve opening is the output current of the throttle valve opening sensor 29. Indicates the value converted from.
- the throttle valve opening begins to increase, the amount of air taken into each cylinder also starts to increase in a similar manner.
- the engine speed has also started to increase.
- the intake start time of cylinder # 1 is t1
- this time tl The throttle valve opening is ⁇ 1.
- the time at which cylinder # 2 starts to suction after cylinder # 1 is defined as t2
- the throttle valve opening at time t2 is defined as ⁇ 2. Since the phase of each cylinder is determined in advance, the time at which cylinders # 2, 3, and 4 start intake can be determined from output information from crankshaft rotation angle sensor 30.
- the rate of change of the air amount G air 1 taken into cylinder # 1 in one intake stroke is By multiplying the coefficient K based on d 9, it is possible to calculate an estimated value of the amount of air G air 2 to be taken into cylinder # 2 in one intake stroke. Further, by performing the same calculation, it is possible to calculate an estimated value of the air amount Gair3, 4 to be taken into the cylinders # 3, 4 in one intake stroke.
- the amount of air taken into each cylinder increases at the same rate as the throttle valve opening, but the amount of air reaches the saturation value of the intake system of this engine 1 (H in Fig. 3).
- the amount of air G airl, 2,3,4 taken into each cylinder # 1,2,3,4 becomes constant, and the throttle valve opening becomes the opening when the air amount reaches the saturation value H.
- the fuel injection amount is controlled to be constant until the value falls below.
- the estimated value of the amount of air sucked into each cylinder can be obtained by the above calculation.
- the air flow system 28 is formed by depositing a platinum thin film on a silicon substrate, and is detected by a pressure sensor that measures a pressure change in the intake passage 8 to measure the amount of air. As well as high sensitivity, it has high responsiveness and measurement accuracy because it has a smaller heat capacity than, for example, an air flow meter using platinum wires. For this reason, the responsiveness of the engine 1 can be improved without performing control of performing fuel injection based only on the throttle valve opening and the engine speed. That is, even when the throttle valve opening is large, fuel injection can be performed based on the air amount measured by the air flow meter 28 and the air amount estimated therefrom.
- the rise of intake air detected by air flow By judging whether or not each cylinder is in the intake stroke based on the angle detection information from the shaft rotation angle sensor 30, fuel injection and ignition can be performed at accurate timing.
- the rise of the intake air means that the amount of air that increases with the passage of time from the time when the intake valve 18 is opened is a predetermined air amount increase value (for example, a value that exceeds the range of air pulsation in the intake passage 8).
- the intake valve 18 starts to close, the air amount that has increased beyond the predetermined air amount increase value starts to decrease.
- the amount of air detected by the air flow meter 28 falls below a predetermined value of the amount of air decrease which is set to a value larger than the predetermined value of increase of the amount of air
- the fall of the intake air is defined as the fall of the intake air. It is also possible to set so that the fall is regarded as the end of the intake into the cylinder 3. This makes it possible to measure and calculate the amount of air from the rise of the intake air to the fall of the intake air, that is, from the time when the intake starts to immediately before the end of the intake.
- the air flow measured by the air flow meter 28 is multiplied by a coefficient based on the rate of change of the throttle valve opening over time, so that the air flow is sucked into the cylinders other than the air-flow cylinder. Since the estimated value of the amount of air to be consumed can be calculated, the number of parts can be reduced compared to the case where airflow meters 28 are provided for all cylinders while optimizing fuel injection, and costs are reduced. Can be achieved.
- the air flow meter 28 with high detection sensitivity, even when the throttle valve opening is large, the air flow measured by the air flow meter 28 and the air volume estimated therefrom are used. Since fuel injection can be performed while maintaining high responsiveness, fuel injection can be performed according to the amount of air irrespective of the throttle valve opening, thereby improving fuel efficiency and reducing exhaust gas.
- fuel injection and ignition can be performed at accurate timing based on the rise of intake air detected by the air flow meter 28 and angle detection information from the crankshaft rotation angle sensor 30.
- the fall of the intake air detected by the air flow system 28 is set to be regarded as the end of the intake into the cylinder 3, the time from the start of the intake to immediately before the end of the intake is set. It is possible to measure and calculate the amount of air between Therefore, the fuel injection according to the air amount can be performed in one cycle of the engine 1, and the fuel injection can be optimized in real time.
- air flow 2.8 is provided not only in one intake passage 8 but also in intake passages 8 corresponding to cylinders having different phases. Even if one or more air passages 28 are provided in one or more and less than all the intake passages 8, the same operation and effect can be obtained.
- the engine 1 is not limited to a four-cylinder engine.
- the air flow measured by the air flow meter 28 is multiplied by a coefficient based on the rate of change in the engine speed over time.
- the air amount may be calculated.
- the air flow meter 28 may be arranged downstream of the throttle valve 9, but in the case of the engine 1 as described above, it is often used as a high-speed engine for motorcycles or the like.
- the length of the intake pipe 6 is reduced to improve responsiveness, and the overlap between the exhaust stroke and the intake stroke is lengthened to cope with high engine speeds. Even so, it is preferable that the air flow meter 28 be located upstream of the throttle valve 9 because the measurement error of the air amount is small and the dirt due to the exhaust gas blowing back is also small.
- the present invention is an intake device for an internal combustion engine, comprising: a plurality of intake passages individually provided in each cylinder of a multi-cylinder internal combustion engine; and a throttle body provided in each of the plurality of intake passages.
- the present invention relates to an intake device for an internal combustion engine in which an air flow sensor for measuring an amount of air taken into a cylinder corresponding to the intake passage is provided in a part of the intake passage.
- the present invention is a control device for an internal combustion engine, comprising: a plurality of intake passages individually provided in each cylinder of a multi-cylinder internal combustion engine; and a throttle body provided in each of the plurality of intake passages.
- An air flow sensor that is provided in a part of the intake passage and measures the amount of air taken into a cylinder corresponding to the intake passage; and an air flow sensor that multiplies the amount of air measured by the air flow sensor by a predetermined coefficient and Calculates the amount of air sucked into each cylinder
- a control unit for calculating a fuel injection amount to each cylinder and outputting a signal to the fuel injection device of the internal combustion engine.
- the air flow sensor is installed by multiplying the air amount measured by the air flow sensor by a coefficient based on the rate of change of the throttle valve opening or the engine speed over time. Since it is possible to calculate the estimated value of the amount of air drawn into cylinders other than cylinders, the number of parts can be reduced compared to the case where air flow sensors are provided for all cylinders, while optimizing fuel injection. The cost can be reduced.
- fuel injection can be performed based on the amount of air measured by the air flow sensor and the amount of air estimated therefrom, so that air can be injected regardless of the throttle valve opening. Fuel injection can be performed according to the amount, which can improve fuel efficiency and reduce exhaust gas.
- each air flow sensor and a rotation angle sensor such as a crankshaft and a camshaft, it is possible to inject fuel into each cylinder at an accurate timing, and to measure and calculate the amount of air.
- a rotation angle sensor such as a crankshaft and a camshaft
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
Description
Claims
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US10/553,681 US7231909B2 (en) | 2003-04-21 | 2004-04-19 | Air intake apparatus and control apparatus for an internal combustion engine |
| EP04728267A EP1619372A1 (en) | 2003-04-21 | 2004-04-19 | Intake and control devices for internal combustion engine |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003-115909 | 2003-04-21 | ||
| JP2003115909A JP2004324426A (ja) | 2003-04-21 | 2003-04-21 | 内燃機関の吸気装置及び制御装置 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2004094798A1 true WO2004094798A1 (ja) | 2004-11-04 |
Family
ID=33307967
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2004/005564 Ceased WO2004094798A1 (ja) | 2003-04-21 | 2004-04-19 | 内燃機関の吸気装置及び制御装置 |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US7231909B2 (ja) |
| EP (1) | EP1619372A1 (ja) |
| JP (1) | JP2004324426A (ja) |
| CN (1) | CN1777743A (ja) |
| WO (1) | WO2004094798A1 (ja) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2275946A1 (en) | 2005-03-04 | 2011-01-19 | STMicroelectronics S.r.l. | Probabilistic neural network and relative training method |
| JP2007107505A (ja) * | 2005-10-17 | 2007-04-26 | Yamaha Motor Co Ltd | 自動二輪車 |
| JP4655229B2 (ja) * | 2006-08-25 | 2011-03-23 | 株式会社デンソー | 内燃機関の吸気システムの異常診断装置 |
| JP7225549B2 (ja) * | 2018-03-23 | 2023-02-21 | 株式会社デンソー | 吸気装置 |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61157741A (ja) * | 1984-12-28 | 1986-07-17 | Toyota Motor Corp | 吸入空気量検出装置 |
| JPH11223543A (ja) * | 1990-02-07 | 1999-08-17 | Hitachi Ltd | 内燃機関用空気流量測定装置 |
| JP2001234798A (ja) * | 2000-02-22 | 2001-08-31 | Hitachi Ltd | 内燃機関の空燃比制御装置および気筒毎流入吸気量推定方法 |
| JP2003262546A (ja) * | 2002-03-07 | 2003-09-19 | Ngk Spark Plug Co Ltd | 流れに関する測定装置及び流量測定方法 |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4125015A (en) * | 1977-05-10 | 1978-11-14 | Fiat Societa Per Azioni | Process and device for determining the quantity of air inducted by an internal combustion engine |
| US4751907A (en) * | 1985-09-27 | 1988-06-21 | Nissan Motor Co., Ltd. | Air/fuel ratio detecting apparatus for internal combustion engines |
| US4869222A (en) * | 1988-07-15 | 1989-09-26 | Ford Motor Company | Control system and method for controlling actual fuel delivered by individual fuel injectors |
| JP2507599B2 (ja) * | 1989-05-29 | 1996-06-12 | 株式会社日立製作所 | 内燃機関用混合気供給装置 |
| JPH0415388A (ja) | 1990-05-01 | 1992-01-20 | Mirai Ind Co Ltd | 波付菅の接続構造及び接続具 |
| US5497329A (en) * | 1992-09-23 | 1996-03-05 | General Motors Corporation | Prediction method for engine mass air flow per cylinder |
| US5419301A (en) * | 1994-04-14 | 1995-05-30 | Ford Motor Company | Adaptive control of camless valvetrain |
| JPH07293297A (ja) * | 1994-04-20 | 1995-11-07 | Hitachi Ltd | 内燃機関の燃料制御方法及びその装置、並びにそれを用いた車両 |
| US6931840B2 (en) * | 2003-02-26 | 2005-08-23 | Ford Global Technologies, Llc | Cylinder event based fuel control |
-
2003
- 2003-04-21 JP JP2003115909A patent/JP2004324426A/ja active Pending
-
2004
- 2004-04-19 WO PCT/JP2004/005564 patent/WO2004094798A1/ja not_active Ceased
- 2004-04-19 US US10/553,681 patent/US7231909B2/en not_active Expired - Fee Related
- 2004-04-19 CN CNA200480010514XA patent/CN1777743A/zh active Pending
- 2004-04-19 EP EP04728267A patent/EP1619372A1/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61157741A (ja) * | 1984-12-28 | 1986-07-17 | Toyota Motor Corp | 吸入空気量検出装置 |
| JPH11223543A (ja) * | 1990-02-07 | 1999-08-17 | Hitachi Ltd | 内燃機関用空気流量測定装置 |
| JP2001234798A (ja) * | 2000-02-22 | 2001-08-31 | Hitachi Ltd | 内燃機関の空燃比制御装置および気筒毎流入吸気量推定方法 |
| JP2003262546A (ja) * | 2002-03-07 | 2003-09-19 | Ngk Spark Plug Co Ltd | 流れに関する測定装置及び流量測定方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2004324426A (ja) | 2004-11-18 |
| US7231909B2 (en) | 2007-06-19 |
| EP1619372A1 (en) | 2006-01-25 |
| CN1777743A (zh) | 2006-05-24 |
| US20060207571A1 (en) | 2006-09-21 |
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