EP1957785A1 - Abgasrückführung bei einer luftgekühlten brennkraftmaschine - Google Patents
Abgasrückführung bei einer luftgekühlten brennkraftmaschineInfo
- Publication number
- EP1957785A1 EP1957785A1 EP06829229A EP06829229A EP1957785A1 EP 1957785 A1 EP1957785 A1 EP 1957785A1 EP 06829229 A EP06829229 A EP 06829229A EP 06829229 A EP06829229 A EP 06829229A EP 1957785 A1 EP1957785 A1 EP 1957785A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- exhaust
- exhaust gas
- gas recirculation
- internal combustion
- 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.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/41—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories characterised by the arrangement of the recirculation passage in relation to the engine, e.g. to cylinder heads, liners, spark plugs or manifolds; characterised by the arrangement of the recirculation passage in relation to specially adapted combustion chambers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
- F02M26/23—Layout, e.g. schematics
- F02M26/27—Layout, e.g. schematics with air-cooled heat exchangers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
- F02M26/29—Constructional details of the coolers, e.g. pipes, plates, ribs, insulation or materials
- F02M26/30—Connections of coolers to other devices, e.g. to valves, heaters, compressors or filters; Coolers characterised by their location on the engine
Definitions
- the invention relates to an internal combustion engine with a crankcase and a cylinder head covering a cylinder of the crankcase, into which a fresh gas channel and an exhaust gas channel are let in, which open on a longitudinal side of the cylinder head and which are each connected to a fresh gas line and an exhaust gas manifold, and an exhaust gas recirculation system , consisting of an exhaust gas recirculation line and a control valve.
- Such an internal combustion engine is known from DE 693 00 649 T2.
- This internal combustion engine has a cylinder head in which the fresh gas channels and the exhaust gas channels of the individual cylinders open on a longitudinal side of the cylinder head of the cylinder head designed as a block cylinder head.
- the exhaust manifold has a special connection for attaching the exhaust gas recirculation system, in particular a control valve for controlling the amount of exhaust gas returned.
- a special component called a ramp is inserted between them and the fresh gas manifold.
- a disadvantage of this design is that the exhaust gas manifold has to be changed and the overall height of the internal combustion engine is increased by inserting the ramp.
- control valve in particular protrudes beyond the given lateral contour of the internal combustion engine. Cooling of the recirculated exhaust gas is not provided and is made more difficult by the immediate proximity to the exhaust manifold, which is hot during operation.
- the object of the invention is to provide an internal combustion engine with an exhaust gas recirculation system, in which the exhaust gas recirculation system remains unaffected by the exhaust gas manifold, which is hot during operation.
- the exhaust gas recirculation system is arranged on the cylinder head side opposite the fresh gas line and the exhaust gas manifold.
- This arrangement far from the exhaust manifold, which is much hotter in operation than other components, results in a direct lowering of the temperature of the recirculated exhaust gas quantity, without further special cooling measures being provided.
- the cylinder head is preferably a single cylinder head which is screwed to the crankcase together with the associated cylinder.
- the invention is also applicable to a block cylinder head and with cylinders made in one piece with the crankcase.
- channels which open on the cylinder head side and are connected to the fresh gas channel and the exhaust gas channel are embedded in the cylinder head (the fresh gas channel and the exhaust gas channel connect gas exchange valves in the cylinder head to the fresh gas line or to the exhaust gas manifold).
- the channels can be arranged at a suitable point in the cylinder head and can be cast in during the manufacture of the cylinder head or can be introduced subsequently by mechanical processing.
- These channels are preferably subsequently machined into the cylinder head, so that the cylinder head blank can be of the same design for an internal combustion engine version with or without exhaust gas recirculation.
- an exhaust gas recirculation system consisting of an exhaust gas recirculation manifold, an exhaust gas recirculation control valve and an exhaust gas recirculation distribution line, can then be easily attached.
- the exhaust manifold can remain unchanged compared to a version without exhaust gas recirculation. This is particularly advantageous if different types of exhaust manifolds with, for example, different connections for the continuation of the exhaust gases are provided for different purposes and customer requirements.
- the structural volume of the internal combustion engine that is relevant for installation is not influenced by this configuration and arrangement of the exhaust gas recirculation system, so that a distinction between an internal combustion engine with exhaust gas recirculation and an internal combustion engine without exhaust gas recirculation can be omitted. This is particularly advantageous with regard to the interchangeability of corresponding internal combustion engines installed, for example, in construction machines or agricultural machines.
- the internal combustion engine has a cooling air blower and the exhaust gas recirculation system is arranged directly in the cooling air flow conveyed by the cooling air blower within a cooling air guide housing.
- This arrangement first of all enables effective cooling of the recirculated exhaust gas without any further effort.
- the exhaust gas recirculation system can be integrated into a cooling air duct, which is formed by a cooling air duct and is arranged along the cylinder head side, and therefore does not represent a component that projects beyond a given lateral contour, so that it is ensured that a corresponding Internal combustion engine equipped with an exhaust gas recirculation system can easily be replaced with the same internal combustion engine without an exhaust gas recirculation system.
- Such an internal combustion engine is preferably an air-cooled internal combustion engine, but it can also act as an internal combustion engine with a combined cooling system, the fan cooling the cooling medium, for example oil and / or water, and optionally also used for air cooling of the cylinder head and / or a heat exchanger, for example.
- a combined cooling system the fan cooling the cooling medium, for example oil and / or water, and optionally also used for air cooling of the cylinder head and / or a heat exchanger, for example.
- the exhaust gas recirculation control valve is arranged adjacent to the cooling air blower, so that this thermally sensitive component is cooled particularly effectively and intensively.
- the exhaust gas recirculation system can in particular have external ribbing, which external ribbing can of course be oriented in the direction of the cooling air flow in terms of flow technology.
- FIG. 1 is a perspective view of an internal combustion engine with the cooling air guide housing open
- Fig. 2 shows a cross section through a cylinder head according to FIG. 1 in
- crankcase 1 has a crankcase 1, which is closed at the bottom by an oil pan 2.
- crankcase 1 On the crankcase 1, 2 cylinder tubes are placed opposite to the oil pan, which in turn are covered by cylinder heads 3.
- the exemplary embodiment is a 4-cylinder internal combustion engine, so that a total of four cylinder tubes and four cylinder heads 3 are installed.
- the internal combustion engine air-cooled and accordingly the cylinder tubes and the cylinder heads 3 are provided with cooling fins 4.
- a double-belt wheel 5 is fastened to a crankshaft mounted in the crankcase 1 and is drive-connected to a generator 7 via a first V-belt 6a and to a cooling-air blower 9 via a second V-belt 6b with the engagement of a tension roller 8.
- the cooling air blower 9 is arranged laterally above the crankcase 1 essentially in the area next to the cylinder tubes and the cylinder heads 3 and conveys cooling air drawn in from the environment into a cooling air guide housing 10 which extends from the cooling air blower 9 to an opposite flywheel-side end 11 of the internal combustion engine and the conveyed cooling air is distributed across the internal combustion engine along the cylinder tubes and the cylinder heads 3. 1, a maintenance cover of the cooling air guide housing 10 is removed and the cooling air guide housing 10 is shown partially cut away in the area of the cooling air blower 9, so that an insight into the interior of the cooling air guide housing 10 is given.
- a row injection pump 12 is attached below the cooling air guide housing 10 and is connected to fuel injection valves inserted in the cylinder heads 3 via injection lines 13a, 13b, shown in broken lines.
- Each fuel injection valve is fastened to the cylinder head by means of clamping claws 14 and connects laterally to a valve cover 15 which extends up to an opposite longitudinal side of the cylinder head to the cylinder head side on the side of the cooling air guide housing.
- a fresh gas line 16 and an exhaust gas manifold 17 are arranged on this cylinder head longitudinal side. In the area above, between and below the fresh gas line 16 and the exhaust manifold 17 flows a substantial part of the cooling air conveyed by the cooling air blower 9 back into the environment.
- the combustion chambers located in the cylinders between the individual cylinder heads 3 and the pistons which can be moved up and down in the cylinders are each connected to the fresh gas line 16 and the exhaust gas manifold 17 via gas exchange valves and gas exchange channels.
- 3 channels 18a, 18b (FIG. 2) are worked into the cylinder heads, of which one channel 18a is connected to one another with a gas exchange outlet channel and the channel 18b with a gas exchange inlet channel.
- These channels 18a, 18b are guided in a lower region of the cylinder head 3 to the cooling air blower side of the cylinder head and are provided with suitable connecting devices 19a, 19b.
- An exhaust gas recirculation system is arranged in the cooling air guide housing 10 and connects the channels 18a in a controllable or regulatable manner to the channels 18b.
- the channels 18a are connected to a common collecting line 20, which in the area of the flywheel end 11 is continued via an elbow 21 into a feed line 22 to an exhaust gas recirculation control valve 23.
- a deflection bend 24 is connected to the exhaust gas recirculation control valve 23, which bends into a distribution line 25 which is arranged approximately parallel below the manifold 20 and which in turn is connected to the channels 18b of the individual cylinder heads 3.
- the entire exhaust gas recirculation system is arranged within the cooling air guide housing 10 and is therefore not visible from the outside on the one hand when the cooling air guide housing is closed and on the other hand it does not influence the external dimensions of the internal combustion engine. Furthermore, by arranging the exhaust gas recirculation device effective cooling of the components of the exhaust gas recirculation system completely within the cooling air guide housing 10.
- the individual lines and bends as well as the exhaust gas recirculation control valve housing can also be provided with inside and / or outside cooling fins to increase the heat transfer.
- the in-line injection pump 12 is equipped with a regulator which is designed as a mechanical regulator.
- a regulator which is designed as a mechanical regulator.
- the position of a control rod present in the in-line injection pump 12 is tapped without contact and this position is used to control the exhaust gas recirculation control valve 23 via a mechanical or electrical transmission device.
- an electrical control system evaluates a control rod travel signal.
- a Hall sensor is preferably used, which is switched via one or more magnets integrated into the control rod.
- Such a Hall sensor is a very reliable electrical switch with which the exhaust gas recirculation can be switched on and off.
- the exhaust gas recirculation is switched off above an injection quantity that corresponds to a load greater than three quarters of the full load. No exhaust gas is recirculated in this full-load range, since exhaust-gas recirculation would lead to a deterioration in exhaust-gas emissions in the full-load range.
- a number of small magnets are placed side by side in bores in the area of the control rod, which covers this injection quantity area. These magnets switch the Hall sensor attached to the outside of the pump housing of the injector.
- This method or this configuration is extremely reliable, since this electrical control is expressly not an electronic control device.
- the exhaust gas recirculation is switched off at a speed below an increased idling speed. This switching function is provided when there is a risk with lower speeds, for example below a limit speed of 1500 rpm, that exhaust gas recirculation can cause smoke problems due to the design of the injection system.
- an inductive speed switch is provided, which is also attached to the pump housing and emits the desired switching signal below, in particular, a speed of 1450 rpm.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust-Gas Circulating Devices (AREA)
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102005059007A DE102005059007A1 (de) | 2005-12-08 | 2005-12-08 | Abgasrückführung bei einer luftgekühlten Brennkraftmaschine |
PCT/EP2006/011545 WO2007065601A1 (de) | 2005-12-08 | 2006-12-01 | Abgasrückführung bei einer luftgekühlten brennkraftmaschine |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1957785A1 true EP1957785A1 (de) | 2008-08-20 |
EP1957785B1 EP1957785B1 (de) | 2009-02-18 |
Family
ID=37814354
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP06829229A Not-in-force EP1957785B1 (de) | 2005-12-08 | 2006-12-01 | Abgasrückführung bei einer luftgekühlten brennkraftmaschine |
Country Status (5)
Country | Link |
---|---|
US (1) | US7832384B2 (de) |
EP (1) | EP1957785B1 (de) |
AT (1) | ATE423272T1 (de) |
DE (2) | DE102005059007A1 (de) |
WO (1) | WO2007065601A1 (de) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007054954A1 (de) * | 2007-11-17 | 2009-05-20 | Deutz Ag | Luftgekühlte Brennkraftmaschine |
KR101802223B1 (ko) * | 2010-04-30 | 2017-11-28 | 얀마 가부시키가이샤 | 엔진 |
JP5754914B2 (ja) * | 2010-10-26 | 2015-07-29 | ダイハツ工業株式会社 | 内燃機関 |
FR2973445B1 (fr) * | 2011-03-31 | 2015-08-21 | Valeo Systemes Thermiques | Boitier repartiteur de gaz d'admission dans un moteur, notamment de vehicule automobile, et module d'alimentation en gaz comprenant ledit boitier |
CN109070326A (zh) | 2016-02-08 | 2018-12-21 | 宣伟公司 | 折叠工具 |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5552049Y2 (de) * | 1976-01-31 | 1980-12-03 | ||
JPS5337232A (en) | 1976-09-17 | 1978-04-06 | Toyota Motor Corp | Recirculating device of exhaust gas for internal combustion engine |
JPS55107019A (en) * | 1979-02-08 | 1980-08-16 | Yamaha Motor Co Ltd | Intake device for engine |
DE2939708A1 (de) * | 1979-09-29 | 1981-04-16 | Robert Bosch Gmbh, 7000 Stuttgart | Einrichtung zur erwaermung eines teils des kraftstoff-luft-gemisches-zufuehrsystems einer brennkraftmaschine |
US4271810A (en) * | 1980-01-11 | 1981-06-09 | General Motors Corporation | Divided chamber engine with prechamber exhaust recirculation |
JPS5949755U (ja) * | 1982-09-27 | 1984-04-02 | 本田技研工業株式会社 | 内燃エンジン |
FR2689936B1 (fr) * | 1992-04-09 | 1994-07-08 | Peugeot | Dispositif a rampe integree pour le recyclage des gaz d'echappement d'un moteur a combustion interne. |
US6386154B1 (en) * | 2000-06-12 | 2002-05-14 | The United States Of America As Represented By The Administrator Of The Environmental Protection Agency | Pumped EGR system |
JP3800020B2 (ja) * | 2001-03-13 | 2006-07-19 | 日産自動車株式会社 | 圧縮自己着火式エンジン |
FR2840363B1 (fr) * | 2002-06-04 | 2006-01-06 | Valeo Thermique Moteur Sa | Module d'echange de chaleur conforme pour envelopper un moteur de vehicule automobile |
US6868842B2 (en) * | 2002-06-28 | 2005-03-22 | Caterpillar Inc. | Cylinder head of engine having recirculation chamber |
DE10360092A1 (de) * | 2003-12-20 | 2005-07-21 | Deutz Ag | AGR-Kühler für insbesondere luftgekühlte Motoren |
-
2005
- 2005-12-08 DE DE102005059007A patent/DE102005059007A1/de not_active Withdrawn
-
2006
- 2006-12-01 DE DE502006002917T patent/DE502006002917D1/de active Active
- 2006-12-01 EP EP06829229A patent/EP1957785B1/de not_active Not-in-force
- 2006-12-01 AT AT06829229T patent/ATE423272T1/de active
- 2006-12-01 WO PCT/EP2006/011545 patent/WO2007065601A1/de active Application Filing
- 2006-12-01 US US12/084,491 patent/US7832384B2/en active Active
Non-Patent Citations (1)
Title |
---|
See references of WO2007065601A1 * |
Also Published As
Publication number | Publication date |
---|---|
ATE423272T1 (de) | 2009-03-15 |
DE102005059007A1 (de) | 2007-07-05 |
EP1957785B1 (de) | 2009-02-18 |
WO2007065601A1 (de) | 2007-06-14 |
US7832384B2 (en) | 2010-11-16 |
US20090139501A1 (en) | 2009-06-04 |
DE502006002917D1 (de) | 2009-04-02 |
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