EP0497677A1 - Verbesserungen zur Abgasrückführeinrichtung - Google Patents
Verbesserungen zur Abgasrückführeinrichtung Download PDFInfo
- Publication number
- EP0497677A1 EP0497677A1 EP92400202A EP92400202A EP0497677A1 EP 0497677 A1 EP0497677 A1 EP 0497677A1 EP 92400202 A EP92400202 A EP 92400202A EP 92400202 A EP92400202 A EP 92400202A EP 0497677 A1 EP0497677 A1 EP 0497677A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- valve
- recycling
- jack
- solenoid valve
- piston
- 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
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D21/00—Controlling engines characterised by their being supplied with non-airborne oxygen or other non-fuel gas
- F02D21/06—Controlling engines characterised by their being supplied with non-airborne oxygen or other non-fuel gas peculiar to engines having other non-fuel gas added to combustion air
- F02D21/08—Controlling engines characterised by their being supplied with non-airborne oxygen or other non-fuel gas peculiar to engines having other non-fuel gas added to combustion air the other gas being the exhaust gas of 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
- F02M26/52—Systems for actuating EGR valves
- F02M26/59—Systems for actuating EGR valves using positive pressure actuators; Check valves therefor
Definitions
- the invention relates to devices which provide partial recycling of exhaust gases in internal combustion engines of vehicles, devices comprising for this purpose a recycling pipe extending between a point in the exhaust pipe of the engine and a point in its intake manifold, a valve mounted on this pipe and means for controlling and adjusting the opening of this valve according to predetermined criteria (temperatures, compositions of certain gases, etc.), means themselves comprising a computer capable of producing electrical control signals as a function of said criteria.
- predetermined criteria temperatures, compositions of certain gases, etc.
- valve is disposed near the intake manifold, that is to say in an area of the engine subjected to less intense heating than the manifold. exhaust.
- valve control means In known embodiments of these recycling devices, it has been proposed to make the valve control means understand a hydraulic cylinder whose piston is kinematically linked to the recycling valve and biased in one direction by a spring and whose cylinder is divided into two chambers by said piston and a solenoid valve with at least two mounted positions between the outlet of the oil pump and one of said chambers so that, for one of its positions, said chamber is connected to said outlet, which pushes the piston in a first direction against of the spring return force and that, for the other position of the solenoid valve, said chamber is connected to the casing, the spring then urging the piston in the opposite direction to the previous one (patent DE-A-1 963 235) .
- the object of the invention is, above all, to eliminate these various drawbacks.
- the recycling device is essentially characterized in that the solenoid valve comprises four channels connected respectively, the first, to the outlet of the oil pump, the second, to the return of the oil circuit to the casing, the third, to that, of the two chambers of the jack, the maximum filling of which corresponds to the opening maximum of the valve, and the fourth to the other chamber of the jack, and said solenoid valve is arranged in such a way that, for one of its two positions (rest position), the third channel is connected to the second and the fourth , to the first and that for its other position (recycling position), the third channel is connected to the first and the fourth, to the second.
- the jack is associated with a mechanical spring mounted so as to permanently urge the piston towards its position corresponding to the closing of the valve.
- the invention includes, apart from these main provisions, certain other provisions which are preferably used at the same time and which will be more explicitly discussed below.
- FIGS 1 and 2 of this drawing schematically show a recycling device established according to the invention, respectively in its two rest and recycling positions.
- a recycling pipe 5 extending between a point of the exhaust manifold 3 and a point of the manifold intake 2, pipe fitted with a valve 6 capable of regulating the recycling rate.
- the invention relates more particularly to the way in which the opening of this valve 6 is automatically controlled and regulated from electrical signals produced by the computer 4.
- this motor 1 is here associated with such a circuit, which comprises a pump 7 for circulation of oil, a casing 8 for collecting this oil and pipe sections 9, 10 and 11 respectively connecting the casing to the pump, the pump to the motor and this motor again to the crankcase.
- the rod 14 preferably crosses the intake pipe 2, which allows it to be cooled by the cold fuel mixture introduced into the engine.
- This measure may prove to be advantageous given the high temperature of the exhaust gases which are recycled at the level of the valve 6 in the pipe 2.
- This position corresponds to the application of the valve 6 against its seat and therefore to the closing of this valve and the absence of any recycling of exhaust gas in the engine 1: this is the rest position.
- the piston 13 is therefore biased towards its position (the highest in the drawing) corresponding to the maximum opening of the valve 6, which corresponds to the maximum recycling position.
- This command can be of the all-in-nothing type.
- the electrical signals then being presented in particular in the form of regular sequences of pulses whose widths are all the greater the higher the proportion of exhaust gas to be recycled, l the solenoid valve E being placed in its recycling position throughout the duration of said pulses and on the contrary in its rest position during the intervals between the successive pulses.
- a spring 19 can be introduced into the chamber P of this variant to ensure the closure of the valve 6, the return force of this spring 19 seconding the hydraulic pressure exerted on the piston 13 for the rest position of the device, or even substituting at this pressure in the event of damage.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve Device For Special Equipments (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
- Lubrication Of Internal Combustion Engines (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9100963A FR2672085B1 (fr) | 1991-01-29 | 1991-01-29 | Perfectionnements aux dispositifs de recyclage des gaz d'echgappement. |
FR9100963 | 1991-01-29 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0497677A1 true EP0497677A1 (de) | 1992-08-05 |
EP0497677B1 EP0497677B1 (de) | 1994-01-12 |
Family
ID=9409137
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP92400202A Expired - Lifetime EP0497677B1 (de) | 1991-01-29 | 1992-01-27 | Verbesserungen zur Abgasrückführeinrichtung |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0497677B1 (de) |
DE (1) | DE69200036T2 (de) |
ES (1) | ES2048021T3 (de) |
FR (1) | FR2672085B1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106121827B (zh) * | 2016-06-28 | 2018-01-02 | 中国南方航空工业(集团)有限公司 | 发动机的滑油*** |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1963235A1 (de) * | 1969-12-17 | 1971-06-24 | Motoren Werke Mannheim Ag | Brennkraftmaschine,insbesondere selbstzuendende luftverdichtende Brennkraftmaschine fuer den Betrieb mit zuendunwilligen Brennstoffen |
US3868868A (en) * | 1973-10-05 | 1975-03-04 | Gen Motors Corp | Transmission controlled emission control system |
US4020809A (en) * | 1975-06-02 | 1977-05-03 | Caterpillar Tractor Co. | Exhaust gas recirculation system for a diesel engine |
-
1991
- 1991-01-29 FR FR9100963A patent/FR2672085B1/fr not_active Expired - Fee Related
-
1992
- 1992-01-27 EP EP92400202A patent/EP0497677B1/de not_active Expired - Lifetime
- 1992-01-27 DE DE69200036T patent/DE69200036T2/de not_active Expired - Fee Related
- 1992-01-27 ES ES92400202T patent/ES2048021T3/es not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1963235A1 (de) * | 1969-12-17 | 1971-06-24 | Motoren Werke Mannheim Ag | Brennkraftmaschine,insbesondere selbstzuendende luftverdichtende Brennkraftmaschine fuer den Betrieb mit zuendunwilligen Brennstoffen |
US3868868A (en) * | 1973-10-05 | 1975-03-04 | Gen Motors Corp | Transmission controlled emission control system |
US4020809A (en) * | 1975-06-02 | 1977-05-03 | Caterpillar Tractor Co. | Exhaust gas recirculation system for a diesel engine |
Also Published As
Publication number | Publication date |
---|---|
EP0497677B1 (de) | 1994-01-12 |
DE69200036T2 (de) | 1994-07-07 |
ES2048021T3 (es) | 1994-03-01 |
FR2672085B1 (fr) | 1993-05-14 |
DE69200036D1 (de) | 1994-02-24 |
FR2672085A1 (fr) | 1992-07-31 |
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