EP1703115B1 - Soupape thermostatique avec une soupape intégrée de recirculation des gaz d'échappement - Google Patents

Soupape thermostatique avec une soupape intégrée de recirculation des gaz d'échappement Download PDF

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Publication number
EP1703115B1
EP1703115B1 EP06003871.8A EP06003871A EP1703115B1 EP 1703115 B1 EP1703115 B1 EP 1703115B1 EP 06003871 A EP06003871 A EP 06003871A EP 1703115 B1 EP1703115 B1 EP 1703115B1
Authority
EP
European Patent Office
Prior art keywords
thermostatic valve
cooling
valve
exhaust gas
housing
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 - Lifetime
Application number
EP06003871.8A
Other languages
German (de)
English (en)
Other versions
EP1703115A1 (fr
Inventor
Herbert Schmitz
Jan Zimmermann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GM Global Technology Operations LLC
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GM Global Technology Operations LLC
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Publication date
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Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
    • F01P11/04—Arrangements of liquid pipes or hoses
    • 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
    • F02M26/28—Layout, e.g. schematics with liquid-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
    • 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
    • F02M26/51—EGR valves combined with other devices, e.g. with intake valves or compressors
    • 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
    • F02M26/65—Constructional details of EGR valves
    • F02M26/72—Housings
    • F02M26/73—Housings with means for heating or cooling the EGR valve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P2070/00—Details
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P7/00—Controlling of coolant flow
    • F01P7/14—Controlling of coolant flow the coolant being liquid
    • F01P7/16—Controlling of coolant flow the coolant being liquid by thermostatic control

Definitions

  • the present invention relates to a thermostatic valve of a cooling water circuit for an internal combustion engine with a thermostatic valve housing to which at least one cooling water inlet opening and a cooling water outlet opening for a small cooling water circuit is arranged, and a flange for mounting to a cylinder head of the internal combustion engine, and a cooling water outlet opening for forwarding the cooling water to a large cooling water circuit in accordance with the cooling water temperature, wherein the thermostatic valve housing further corresponds to an EGR valve of an exhaust gas recirculation device.
  • exhaust gas recirculation systems are used to reduce the nitrogen oxide emission and to achieve a lower fuel consumption, in diesel engines this applies in particular to the formation of particles.
  • the combustion peak temperature is lowered. This measure reduces the very strong temperature-dependent nitric oxide emissions.
  • the nitrogen oxide formation reaction is exponentially dependent on the combustion temperature.
  • the exhaust gas contains little or no Oxygen molecules. To cover the greater demand for oxygen, a larger amount of clean air is needed. In the partial load range with wide open throttle and excess air thus lower throttle losses occur, whereby a lower consumption can be achieved.
  • By adding exhaust gas throttling of the clean air is greatly reduced for a given amount of fuel.
  • the exhaust gas recirculation (EGR) is usually located in the region of the cylinder head of an internal combustion engine between the intake and the exhaust manifold, usually on the cylinder head in the vicinity of the cooling water circuit for the internal combustion engine.
  • the cooling water system consists essentially of a small and a large cooling water circuit.
  • the cooling water circulates in the large and small cooling water circuit starting from the internal combustion engine via a radiator arranged in the front region of the vehicle, from which the cooled cooling water is returned to the internal combustion engine.
  • the circulation is achieved by means of a pump switched on in the cooling water circuit.
  • the cooling water circulates within a small cooling water circuit, so not on the radiator. Only when the cooling water temperature has reached a fixed value_, a thermostatic valve switches on the cooling water circulation of the large cooling water circuit.
  • cooling water is also used for heating the vehicle interior and for cooling the exhaust gas flowing through the exhaust gas recirculation device.
  • the exhaust gas recirculation device is arranged with deviations depending on the design of the gasoline or diesel engine between the exhaust manifold and the intake manifold of the internal combustion engine.
  • the exhaust gas taken from the exhaust manifold is valve controlled to the fuel-air mixture in the intake manifold.
  • the EGR valve is used to control the flow of exhaust gas and is controlled by various parameters such as accelerator pedal position, engine speed, air temperature, air pressure, pure air mass flow, etc. and more accurate adjustments of the EGR valve position. Furthermore, it is necessary to cool excessively heated exhaust gas to a tolerable level before returning it to the intake manifold, because cooled exhaust gas enhances the effect of reducing emissions.
  • an EGR cooler is used, which is in communication with the large cooling water circuit of the internal combustion engine.
  • Appropriate piping is required to connect the EGR valve, EGR cooler and thermostat valve of the cooling water circuit.
  • a motor radiator assembly which has a central opening for receiving a generator to be cooled.
  • the central opening is surrounded by an annular cooling channel, which on one side a Inlet and on the opposite side has an outlet.
  • an exhaust gas recirculation valve is provided in a housing.
  • a thermostatic valve is provided in a thermostat housing.
  • the thermostat housing, the walls of the central annular cooling channel and the housing of the exhaust gas recirculation valve disposed opposite the thermostat housing are parts of a common radiator transfer body.
  • thermostatic valve of a cooling water circuit which corresponds minimal space with an EGR valve and can be mounted in a simple manner on the engine.
  • the invention includes the technical teaching that in addition to the thermostatic valve mechanism in addition, the valve mechanism of the EGR valve is integrated in the thermostatic valve housing, wherein the thermostatic valve housing flowing through cooling water is used to cool the exhaust gas flowing through the EGR valve.
  • the advantage of the solution according to the invention lies in the fact that a separate housing for the EGR valve completely eliminated and thus also seals or pipes for connection to the housing of the thermostatic valve are dispensable. A correspondingly lower installation costs are incurred.
  • the inventive functional integration of a thermostatic valve function with an EGR valve function in a single housing the space size decreases accordingly.
  • a synergy effect is achieved in that the cooling water, which flows through the thermostatic valve housing, is used simultaneously for cooling the exhaust gas, which flows through the EGR valve.
  • the EGR cooler can be omitted depending on the cooling requirements.
  • the integration of the EGR valve in the thermostatic valve housing is designed such that the thermostatic valve housing has a recess for receiving the valve mechanism of the EGR valve, which is closed by a cover for covering the actuating unit of the EGR valve.
  • the leading to the valve mechanism of the EGR valve and channels leading away therefrom are thus formed in the thermostatic valve housing and on the cover provided detachably on the thermostatic valve housing, on the one hand, the actuating unit of the EGR valve is accessible; On the other hand, the electrical termination for the actuator unit is arranged on the cover.
  • the EGR channels which are in communication with the EGR valve are preferably arranged adjacent to the housing-internal cooling water passages in the thermostatic valve housing.
  • the adjacent arrangement a heat exchange between the hot exhaust gas and the cooling water is achieved with a sufficient efficiency.
  • To increase the efficiency of the EGR channels can also run at least partially within cooling water channels, so that they are lapped by the cooling water.
  • the thermostatic valve housing with which the thermostatic valve is attached to the cylinder head of the internal combustion engine, at least introduced the inlet opening of the recirculated exhaust gas from the cooling water inlet and cooling water outlet opening, extending transversely over the flange surface securing groove is.
  • a strict separation of the exhaust gas recirculation circuit is achieved by the cooling water circuit, so that leakage in the sealing area between the cylinder head and thermostatic valve cooling water can not get into the exhaust gas recirculation and vice versa, but is discharged through the groove in case of leakage.
  • This safety groove is particularly easy to produce by milling, pouring or the like.
  • the outlet opening of the EGR valve is provided according to a further measure improving the invention outside the flange on the thermostatic valve housing to direct the recirculated exhaust gas at a suitable location directly from the thermostatic valve housing to the intake manifold of the internal combustion engine.
  • This outlet opening could in turn also be guided through the cylinder head, as already shown on the outlet side.
  • the thermostatic valve according to the invention is preferably produced by die-casting and consists of a light metal, in particular an aluminum alloy or the like.
  • a light metal in particular an aluminum alloy or the like.
  • any type of metal casting is used, even milled from the solid would be possible.
  • FIG. 1 is a cylinder head 1 of a - not shown - internal combustion engine, a thermostat valve housing 2 flanged.
  • the cooling water 3 flowing through the cylinder head 1 passes into the region of the thermostatic valve housing 2, where it is supplied either in accordance with the cooling water temperature - a small cooling water circuit or a large cooling water circuit - also not shown.
  • an EGR valve 4 of an exhaust gas recirculation device is further integrated (shown here only schematically).
  • an EGR passage 6 which partially passes through the cylinder head 1 and removes part of the exhaust gas produced by the combustion process from the exhaust manifold 5.
  • the flow of the exhaust gas recirculation device is controlled by the EGR valve 4 in a conventional manner. After passing through the EGR valve 4, the exhaust gas is supplied via a further EGR passage 7 to an intake manifold 8 of the internal combustion engine and thus to the fuel-air mixture.
  • the thermostatic valve shown here has a die-cast thermostatic valve housing 2 made of light metal, on which a flange surface 9 is provided for mounting on a - not shown - cylinder head of an internal combustion engine.
  • the operating unit of an integrated in the thermostatic valve body 2 EGR valve is provided with a cap 10 which is screwed to the thermostatic valve housing 2.
  • the cap 10 has an upper opening for the electrical connection of the actuator unit of the EGR valve.
  • a - not shown here - electrical line is from here with an electronic control unit of the engine management in conjunction.
  • the thermostatic valve housing 2 further has a connection 11 for the Heating flow on. Outside the flange surface 9, a cooling water outlet opening 12 for the cooling circuit and an outlet opening 13 for the recirculated exhaust gas of the exhaust gas recirculation device is further provided.
  • FIG. 3 is on the flange 9 of the thermostatic valve housing 2, an inlet opening 14 for the - not shown here - exhaust manifold of the internal combustion engine branched exhaust gas is provided, which is controlled via the integrated EGR valve, the outlet opening 13 is supplied.
  • On the flange 9 is still a cooling water inlet opening 15 of the cooling water circuit.
  • Another cooling water outlet opening 16 (bypass) for the small cooling water circuit is also provided on the flange 9 of the thermostatic valve housing 2.
  • Between the inlet opening 14 of the exhaust gas recirculation device and the cooling water inlet opening 15 and the cooling water outlet opening 16 extends transversely across the flange 9 a securing groove 17 which prevents cooling water enters the exhaust gas recirculation device and vice versa.
  • the thermostatic valve housing 2 houses a thermostatic valve mechanism 18 for switching the flow of cooling water between the cooling water inlet opening 15 and the cooling water outlet opening 16 or 12 of the small or large cooling water circuit.
  • the EGR valve 4 is disposed within a recess 19 of the thermostatic valve housing 2. Concretely, the thermostatic valve housing 2 accommodates the valve mechanism of the EGR valve 4, which switches the exhaust gas flow starting from the inlet opening 14, which is not recognizable here, to the outlet opening 13.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust-Gas Circulating Devices (AREA)

Claims (6)

  1. Vanne thermostatique d'un circuit d'eau de refroidissement pour un moteur à combustion interne avec un corps de vanne thermostatique (2) sur lequel sont disposées au moins une ouverture d'entrée d'eau de refroidissement (15) et une ouverture de sortie d'eau de refroidissement (16) pour un petit circuit d'eau de refroidissement, ainsi qu'une surface de bride (9) pour le montage sur une culasse de cylindre (1) du moteur à combustion interne, et une ouverture de sortie d'eau de refroidissement (12) pour acheminer l'eau de refroidissement vers un grand circuit d'eau de refroidissement en fonction de la température de l'eau de refroidissement, le corps de vanne thermostatique (2) étant en outre en correspondance avec une vanne de retour de gaz de combustion (4) d'un dispositif de retour des gaz de combustion, caractérisée en ce que le corps de vanne thermostatique (2) contient, outre le mécanisme de la vanne thermostatique (18), le mécanisme de vanne de la vanne de retour des gaz de combustion (4), l'eau de refroidissement qui traverse le corps de vanne thermostatique (2) servant en même temps à refroidir les gaz de combustion qui traversent la vanne de retour des gaz de combustion (4).
  2. Vanne thermostatique selon la revendication 1, caractérisée en ce que le corps de vanne thermostatique (2) présente un évidement (19) pour recevoir le mécanisme de vanne de la vanne de retour des gaz de combustion (4), qui est fermé par un capuchon de couverture (10) destiné à couvrir l'unité d'actionnement de la vanne de retour des gaz de combustion (4).
  3. Vanne thermostatique selon la revendication 1, caractérisée en ce que pour refroidir les gaz de combustion traversant la vanne de retour des gaz de combustion (4), les canaux de retour des gaz de combustion internes au corps qui sont reliés à la vanne de retour des gaz de combustion (4) passent à proximité des canaux d'eau de refroidissement internes au corps dans le corps de vanne thermostatique (2).
  4. Vanne thermostatique selon l'une des revendications précédentes, caractérisée en ce qu'une gorge de sûreté (17) courant transversalement sur la surface de bride et séparant l'ouverture d'entrée (14) des gaz de combustion à renvoyer des ouvertures d'entrée et de sortie de l'eau de refroidissement (15, 16) est ménagée sur la surface de bride (9) du corps de vanne thermostatique (2).
  5. Vanne thermostatique selon l'une des revendications précédentes, caractérisée en ce qu'une ouverture de sortie (13) de la vanne de retour des gaz de combustion (4) est prévue en dehors de la surface de bride (9) sur le corps de vanne thermostatique (2) pour guider les gaz de combustion à ramener vers le collecteur d'admission (8) du moteur à combustion interne.
  6. Vanne thermostatique selon l'une des revendications précédentes, caractérisée en ce que le corps de vanne thermostatique (2) se compose d'un alliage léger et de fonte moulée sous pression.
EP06003871.8A 2005-03-19 2006-02-25 Soupape thermostatique avec une soupape intégrée de recirculation des gaz d'échappement Expired - Lifetime EP1703115B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102005012759A DE102005012759A1 (de) 2005-03-19 2005-03-19 Thermostatventil mit integriertem AGR-Ventil

Publications (2)

Publication Number Publication Date
EP1703115A1 EP1703115A1 (fr) 2006-09-20
EP1703115B1 true EP1703115B1 (fr) 2013-04-10

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EP06003871.8A Expired - Lifetime EP1703115B1 (fr) 2005-03-19 2006-02-25 Soupape thermostatique avec une soupape intégrée de recirculation des gaz d'échappement

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EP (1) EP1703115B1 (fr)
DE (1) DE102005012759A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007049336B4 (de) * 2007-10-12 2019-09-05 Mahle International Gmbh Multifunktionales Modul zur Anbringung an einer Verbrennungskraftmaschine und zur Führung von Fluiden
FR3005608B1 (fr) * 2013-05-17 2016-10-14 Renault Sa Support d'organes pour moteur de vehicule, systeme de raccordement de fluide et moteur de vehicule correspondants
FR3030637B1 (fr) * 2014-12-22 2018-02-16 Valeo Systemes De Controle Moteur Module d'alimentation pour moteur a combustion, comportant un canal de refroidissement
FR3063772B1 (fr) * 2017-03-08 2021-12-03 Renault Sas Interface echangeur egr hp pour moteur thermique

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5666930A (en) * 1996-04-18 1997-09-16 General Motors Corporation Structural throttle body mount
DE19750588B4 (de) * 1997-11-17 2016-10-13 MAHLE Behr GmbH & Co. KG Vorrichtung zur Abgasrückführung für einen Verbrennungsmotor
EP1121514A4 (fr) * 1999-08-16 2006-03-08 Delphi Tech Inc Ensemble d'intercommunication pour liquide de refroidissement de moteur
JP3852255B2 (ja) * 1999-11-10 2006-11-29 いすゞ自動車株式会社 Ｅｇｒ及びオイルの冷却装置
WO2003098026A1 (fr) * 2002-05-15 2003-11-27 Behr Gmbh & Co. Kg Echangeur de chaleur des gaz d'echappement a commutation
GB0220480D0 (en) 2002-09-04 2002-10-09 Ford Global Tech Inc A motor vehicle and a thermostatically controlled valve therefor

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Publication number Publication date
DE102005012759A1 (de) 2006-10-12
EP1703115A1 (fr) 2006-09-20

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