JPS636725B2 - - Google Patents
Info
- Publication number
- JPS636725B2 JPS636725B2 JP57007553A JP755382A JPS636725B2 JP S636725 B2 JPS636725 B2 JP S636725B2 JP 57007553 A JP57007553 A JP 57007553A JP 755382 A JP755382 A JP 755382A JP S636725 B2 JPS636725 B2 JP S636725B2
- Authority
- JP
- Japan
- Prior art keywords
- exhaust gas
- heat recovery
- recovery device
- exhaust
- combustion engine
- 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.)
- Expired
Links
- 238000011084 recovery Methods 0.000 claims description 22
- 238000002485 combustion reaction Methods 0.000 claims description 20
- 230000007423 decrease Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
- F02G5/00—Profiting from waste heat of combustion engines, not otherwise provided for
- F02G5/02—Profiting from waste heat of exhaust gases
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Silencers (AREA)
- Exhaust Gas After Treatment (AREA)
Description
【発明の詳細な説明】
本発明は内燃機関から排出される排気ガスの熱
エネルギーを回収する排気熱回収装置に関するも
のである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an exhaust heat recovery device for recovering thermal energy of exhaust gas discharged from an internal combustion engine.
従来のこの種排気熱回収装置の典型例は第１図
に示すように、排気ガス発生源例えば内燃機関１
に接続された排気ガス系路２（以下配管と称す）
に排熱回収器４と排気フアン５を設け、この排気
フアン５により熱回収器４で熱回収された排気ガ
スを、排気ガス系路２を経て大気中に排出するよ
うに構成されている。 A typical example of a conventional exhaust heat recovery device of this type is as shown in FIG.
Exhaust gas line 2 (hereinafter referred to as piping) connected to
An exhaust heat recovery device 4 and an exhaust fan 5 are provided in the exhaust heat recovery device 4, and the exhaust gas recovered by the heat recovery device 4 is discharged into the atmosphere via the exhaust gas line 2.
このような構成では、排気ガス発生源１の排気
ガス排出部の圧力は、その排出部に接続された配
管２内の流動抵抗と排気フアン５の揚程との差に
より決定される。前記配管２内の排気ガス温度お
よび流量が一定であると、排気ガス発生源１の排
気ガス排出部の圧力は一定値に維持されるが、配
管２内の流量が変動するときには、前記排出部の
圧力も著しく変動することは明らかである。 In such a configuration, the pressure at the exhaust gas discharge part of the exhaust gas generation source 1 is determined by the difference between the flow resistance in the pipe 2 connected to the discharge part and the lift of the exhaust fan 5. When the exhaust gas temperature and flow rate in the pipe 2 are constant, the pressure at the exhaust gas discharge part of the exhaust gas generation source 1 is maintained at a constant value, but when the flow rate in the pipe 2 fluctuates, the pressure in the exhaust gas discharge part It is clear that the pressure also varies significantly.
一方、排気ガス発生源１がその排気ガス排出部
の圧力に変動を生じても何ら支障ない場合には、
第１図に示すような構成により十分に発揮させる
ことができる。 On the other hand, if the exhaust gas generation source 1 causes no problem even if the pressure at its exhaust gas discharge part fluctuates,
The configuration shown in FIG. 1 can fully utilize this effect.
ところが排気ガス発生源１が内燃機関である場
合には、その排気ガス排出部の圧力変動により、
燃焼室内の混合気体（燃料＋空気）の状態が変化
し、あるいは本来の燃料供給系の制御特性が変化
するなどの不都合を生ずる恐れがある。 However, when the exhaust gas generation source 1 is an internal combustion engine, due to pressure fluctuations at the exhaust gas discharge section,
This may cause problems such as a change in the state of the gas mixture (fuel+air) in the combustion chamber or a change in the original control characteristics of the fuel supply system.
本発明は上記にかんがみ内燃機関の背圧を一定
保持することを目的とするもので、内燃機関に接
続された排気ガス系路に熱回収器および排気フア
ンを設け、前記内燃機関と熱回収器との間の排気
ガス系路に圧力検知器を付設すると共に、前記熱
回収器と排気フアンとの間の排気ガス系路に制御
弁を介して大気に開口する枝管を接続し、その制
御弁の開閉を前記圧力検知器を介して制御するよ
うにしたことを特徴とするものである。 In view of the above, it is an object of the present invention to maintain a constant back pressure of an internal combustion engine, and a heat recovery device and an exhaust fan are provided in the exhaust gas line connected to the internal combustion engine. A pressure detector is attached to the exhaust gas line between the heat recovery device and the exhaust fan, and a branch pipe that opens to the atmosphere is connected to the exhaust gas line between the heat recovery device and the exhaust fan via a control valve. The present invention is characterized in that opening and closing of the valve is controlled via the pressure sensor.
以下本発明の一実施例を図面について説明す
る。 An embodiment of the present invention will be described below with reference to the drawings.
第２図において、１は内燃機関、２は内燃機関
１の排気ガス排出部１ａに接続された排気ガス系
路で、この系路２には熱回収器４と排気フアン５
が設けられている。６は内燃機関１と熱回収器４
との間の排気ガス系路２ａに、かつ内燃機関１の
排気ガス排出部１ａの近傍に付設された圧力検知
器、７は熱回収器４と排気フアン５との間の排気
ガス系路２ｂに接続された枝管で、この枝管７は
制御弁８を介して大気に開口されている。９は前
記圧力検知器６および制御弁８に接続された制御
器である。 In FIG. 2, 1 is an internal combustion engine, 2 is an exhaust gas line connected to the exhaust gas discharge part 1a of the internal combustion engine 1, and this line 2 includes a heat recovery device 4 and an exhaust fan 5.
is provided. 6 is an internal combustion engine 1 and a heat recovery device 4
A pressure sensor 7 is attached to the exhaust gas line 2a between the heat recovery device 4 and the exhaust fan 5 and near the exhaust gas discharge part 1a of the internal combustion engine 1; This branch pipe 7 is opened to the atmosphere via a control valve 8. 9 is a controller connected to the pressure sensor 6 and the control valve 8.
本実施例は上記のような構成からなり、内燃機
関１から排出される排気ガスが減少すると、これ
に伴つて排気ガス系路２ａ，２ｂ内の圧力損失も
減少するため、排気フアン５の揚程は余る。その
結果、内燃機関１の背圧が低下する場合には、そ
の背圧を圧力検知器６により検知し、制御器９を
介して枝管７の制御弁８を開放させる。このため
大気は枝管７を経て排気ガス系路２ｂに排気ガス
と混合して排気フアン５に導入されるので、排気
フアン５の余剰の揚程は減少するから、内燃機関
１の背圧を上昇させることができる。 The present embodiment has the above-described configuration, and when the exhaust gas discharged from the internal combustion engine 1 decreases, the pressure loss in the exhaust gas lines 2a and 2b also decreases, so that the lift height of the exhaust fan 5 decreases. is left over. As a result, when the back pressure of the internal combustion engine 1 decreases, the back pressure is detected by the pressure detector 6 and the control valve 8 of the branch pipe 7 is opened via the controller 9. For this reason, the atmosphere passes through the branch pipe 7, enters the exhaust gas line 2b, mixes with exhaust gas, and is introduced into the exhaust fan 5, so the excess head of the exhaust fan 5 decreases, increasing the back pressure of the internal combustion engine 1. can be done.
上記のように内燃機関１の背圧を調整するため
の大気の導入は、内燃機関１の排気ガス排出部１
ａから排気フアン５の間のいづれの位置でもよい
が、熱回収器４の上流側において大気を導入して
排気ガスと混合させると、排気ガス温度が低下し
て熱回収器４の熱交換性能を低下させるから好ま
しくない。したがつて本実施例では熱回収器４と
枝管７を排気フアン５との間の排気ガス系路２ｂ
に接続した。 As mentioned above, the introduction of atmospheric air to adjust the back pressure of the internal combustion engine 1 is carried out at the exhaust gas discharge part 1 of the internal combustion engine 1.
Any position between a and the exhaust fan 5 may be used, but if air is introduced at the upstream side of the heat recovery device 4 and mixed with the exhaust gas, the exhaust gas temperature decreases and the heat exchange performance of the heat recovery device 4 decreases. This is not desirable because it lowers the Therefore, in this embodiment, the heat recovery device 4 and the branch pipe 7 are connected to the exhaust gas line 2b between the exhaust fan 5.
connected to.
以上説明したように本発明によれば、内燃機関
の背圧を一定に保持することにより、内燃機関の
負荷が変動しても、内燃機関を安定的に運転する
ことが可能である。 As explained above, according to the present invention, by keeping the back pressure of the internal combustion engine constant, it is possible to stably operate the internal combustion engine even if the load on the internal combustion engine fluctuates.
第１図は従来の排気熱回収装置の系統図、第２
図は本発明の排気熱回収装置の一実施例を示す系
統図である。
１……内燃機関、２ａ，２ｂ……排気ガス系
路、４……熱回収器、５……排気フアン、６……
圧力検知器、７……枝管、８……制御弁。
Figure 1 is a system diagram of a conventional exhaust heat recovery device;
The figure is a system diagram showing an embodiment of the exhaust heat recovery device of the present invention. 1...Internal combustion engine, 2a, 2b...Exhaust gas system path, 4...Heat recovery device, 5...Exhaust fan, 6...
Pressure detector, 7...branch pipe, 8...control valve.
Claims (1)
器および排気フアンを設けてなる排気熱回収装置
において、前記内燃機関と熱回収器との間の排気
ガス系路に圧力検知器を付設すると共に、前記熱
回収器と排気フアンとの間の排気ガス系路に制御
弁を介して大気に開口する枝管を接続し、その制
御弁の開閉を前記圧力検知器を介して制御するよ
うにしたことを特徴とする排気熱回収装置。1. In an exhaust heat recovery device that includes a heat recovery device and an exhaust fan in an exhaust gas line connected to an internal combustion engine, a pressure detector is attached to the exhaust gas line between the internal combustion engine and the heat recovery device. At the same time, a branch pipe opening to the atmosphere is connected to the exhaust gas line between the heat recovery device and the exhaust fan via a control valve, and opening and closing of the control valve is controlled via the pressure detector. An exhaust heat recovery device characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57007553A JPS58126450A (en) | 1982-01-22 | 1982-01-22 | Recovery device of exhaust heat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57007553A JPS58126450A (en) | 1982-01-22 | 1982-01-22 | Recovery device of exhaust heat |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58126450A JPS58126450A (en) | 1983-07-27 |
| JPS636725B2 true JPS636725B2 (en) | 1988-02-12 |
Family
ID=11668983
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57007553A Granted JPS58126450A (en) | 1982-01-22 | 1982-01-22 | Recovery device of exhaust heat |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58126450A (en) |
-
1982
- 1982-01-22 JP JP57007553A patent/JPS58126450A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58126450A (en) | 1983-07-27 |
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