EP1815111A2 - Dispositif de desactivation de cylindres d'un moteur a combustion interne - Google Patents
Dispositif de desactivation de cylindres d'un moteur a combustion interneInfo
- Publication number
- EP1815111A2 EP1815111A2 EP05810744A EP05810744A EP1815111A2 EP 1815111 A2 EP1815111 A2 EP 1815111A2 EP 05810744 A EP05810744 A EP 05810744A EP 05810744 A EP05810744 A EP 05810744A EP 1815111 A2 EP1815111 A2 EP 1815111A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- secondary circuit
- ramp
- pressure
- decommissioning
- cylinder
- 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.)
- Withdrawn
Links
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 12
- 239000012530 fluid Substances 0.000 claims abstract description 14
- 230000009849 deactivation Effects 0.000 claims description 7
- 238000011144 upstream manufacturing Methods 0.000 claims description 3
- 230000007246 mechanism Effects 0.000 description 14
- 238000005086 pumping Methods 0.000 description 5
- 239000000446 fuel Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000008246 gaseous mixture Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
- F01L13/0005—Deactivating valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/20—Adjusting or compensating clearance
- F01L1/22—Adjusting or compensating clearance automatically, e.g. mechanically
- F01L1/24—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/20—Adjusting or compensating clearance
- F01L1/22—Adjusting or compensating clearance automatically, e.g. mechanically
- F01L1/24—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically
- F01L1/2405—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically by means of a hydraulic adjusting device located between the cylinder head and rocker arm
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/20—Adjusting or compensating clearance
- F01L1/22—Adjusting or compensating clearance automatically, e.g. mechanically
- F01L1/24—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically
- F01L2001/2444—Details relating to the hydraulic feeding circuit, e.g. lifter oil manifold assembly [LOMA]
Definitions
- the present invention relates to a method and a device for controlling the pressure of a feed ramp means that allow the shutdown or in service of the valves of a group of cylinders of an internal combustion engine.
- the deactivation of the cylinders is conventionally operated by an appropriate mechanism acting on the distribution of the cylinders according to the operating conditions of the engine.
- an appropriate mechanism acting on the distribution of the cylinders according to the operating conditions of the engine.
- Disengagement of the stops is conventionally performed hydraulically by raising, in a ramp supplying the disengagement mechanism, the pressure above a calibrated threshold pressure.
- Patent FR2837871 illustrates an example of such a mechanism.
- the ramp feeding such a mechanism is empty due to leakage generated at the disengaging mechanism. This is why, during the first cylinder deactivation action, it is first necessary to fill the feed ramp of the disengaging mechanism before being able to raise the pressure above the calibrated threshold pressure. As a result, the first deactivation action of the rolls has a drawback materialized by a very long response time.
- the present invention proposes to overcome this disadvantage by maintaining a minimum pressure in the feed ramp of the disengaging mechanism.
- the subject of the invention is a device for deactivating at least one cylinder of a multi-cylinder type internal combustion engine, comprising means for decommissioning the intake or exhaust valves of said cylinder. actuated by a fluid under pressure, a pressurized fluid supply circuit, a piloted solenoid valve and a secondary circuit connecting said solenoid valve to said means for decommissioning, characterized in that said secondary circuit cooperates with auxiliary power supply means intended to maintaining the fluid filling of said feed ramp outside the periods of operation of said decommissioning means.
- said secondary circuit comprises leakage passages of said fluid, in particular at the means of deactivation and / or at a nozzle provided in said secondary circuit and said auxiliary power supply means are shaped so that their feed rate compensates for the flow of the leakage passages.
- the intake or exhaust valves of said cylinder are actuated by means of hydraulic play-compensated stops fed by a feed ramp and said auxiliary supply means are formed by a calibrated bore ensuring the communication between the feed ramp and the secondary circuit.
- the auxiliary power supply means form a continuous communication with pressure drop between the feed ramp and the secondary circuit.
- the auxiliary power supply means consist of a Venturi effect duct communicating the feed ramp and the secondary circuit.
- the venturi effect duct generates a pressure drop such that the pressure in the secondary circuit connecting the solenoid valve to the means of decommissioning the valves is less than a defined threshold pressure (Pseuil).
- the auxiliary power supply means consist of a conduit of constant section, provided with a plug pierced with an opening of dimension much smaller than the section of the conduit.
- the constant section conduit provided with a pierced plug generates a pressure drop such that the pressure in the secondary circuit connecting the solenoid valve to the means of decommissioning the valves is less than a threshold pressure. defined (Pseuil).
- the hydraulic play catchers incorporate the means for decommissioning the valves.
- the deactivation device comprises a filter upstream of the auxiliary power supply means, intended to limit the fouling of said auxiliary power supply means.
- FIG. 1 represents a schematic view of a device known from the prior art for deactivating two of the four cylinders of an internal combustion engine.
- FIG. 2 represents a schematic view of a device for deactivating two of the four cylinders of an internal combustion engine, according to a first embodiment of the invention.
- FIG. 3 represents a schematic view showing a schematic view of a device for deactivating two of the four cylinders of an internal combustion engine, according to a second embodiment of the invention.
- FIG. 1 there is shown the exhaust portion of a camshaft and latch distribution of an internal combustion engine having four cylinders in line 16, 17, 18, 19. classic, and not shown in the figure, the translational movement of a valve that alternates its opening and closing, operates through a lever, called latch.
- One of the ends of the pawl is in fact in contact with the valve stem and admits an oscillation movement as a function of the rotation of the cam carried by the camshaft.
- the other end of the pawl serves as a pivot point and rests on a stop.
- the hydraulic stops with catch-up clearance 8, 9, 10, 11 respectively comprise means of decommissioning (20, 21, 22, 23), also known as disengaging means, also powered. by a fluid, in this case oil, which is conveyed by the ramp 5.
- a fluid in this case oil
- the ramp 4 which feeds the hydraulic stops with play catch-up
- the ramp 5, which supplies the clutch mechanisms 20, 21, 22, 23, is intermittently powered by means of a communication 14 with the ramp 4.
- the communication 14 is a solenoid valve. More specifically, when it is necessary to disable the valves, the solenoid valve 14 opens so as to let the oil from the ramp 4 to the ramp 5, where the pressure is initially lower. When the pressure in the ramp 5 exceeds a calibrated threshold pressure Pseuil, the clutch mechanisms 20, 21, 22, 23 are activated so as to disengage the hydraulic catch-up stops (8, 9, 10, 11). In this way, the valves are rendered inactive.
- the solenoid valve 14 closes in such a way that the pressure in the ramp 5 descends below that of the calibrated threshold Pseuil so that the clutch mechanisms 20, 21, 22, 23 are no longer enabled. Note that the pressure drop is induced by the leaks existing at the disengaging mechanisms 20, 21, 22, 23 and at a nozzle 24 which serves to degass the fluid circuit in the ramp 5.
- the invention consists in maintaining a continuous communication between the ramps 4 and 5, while controlling the flow rate of the oil from ramp 4 to ramp 5.
- the communication can be carried out by means of a Venturi effect duct 1, dimensioned according to the maximum pressure in the ramp 4 and the calibrated pressure Pseuil in the ramp 5, so that the oil which is flows continuously through the conduit 1 in the ramp 5, does not increase the pressure beyond the calibrated pressure Pseuil.
- the communication can be achieved by means of a duct 3 of constant section, provided with a plug 2 pierced with an opening of much smaller size than the section of the duct 3, so that the oil which flows through the conduit 3, does not increase the pressure in the ramp 5 beyond the calibrated pressure Pseuil.
- auxiliary power supply means whatever the auxiliary power supply means chosen, it is advantageous to have upstream of said auxiliary supply means a filter 25 for filtering the liquid under pressure.
- a filter 25 for filtering the liquid under pressure.
- the invention makes it possible, with few constraints, to maintain a minimum pressure in the feed ramp of the clutch mechanism and consequently to reduce the response time during the first deactivation of the cylinders. .
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
- Valve Device For Special Equipments (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0452786A FR2878570B1 (fr) | 2004-11-26 | 2004-11-26 | Dispositif de desactivation de cylindres d'un moteur a combustion interne |
| PCT/FR2005/050827 WO2006056709A2 (fr) | 2004-11-26 | 2005-10-07 | Dispositif de desactivation de cylindres d'un moteur a combustion interne |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP1815111A2 true EP1815111A2 (fr) | 2007-08-08 |
Family
ID=34951058
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP05810744A Withdrawn EP1815111A2 (fr) | 2004-11-26 | 2005-10-07 | Dispositif de desactivation de cylindres d'un moteur a combustion interne |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP1815111A2 (fr) |
| FR (1) | FR2878570B1 (fr) |
| WO (1) | WO2006056709A2 (fr) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2896540B1 (fr) * | 2006-01-25 | 2008-04-04 | Peugeot Citroen Automobiles Sa | Dispositif de desactivation de cylindres d'un moteur a combustion interne |
| DE102007062280A1 (de) * | 2007-12-21 | 2009-06-25 | Daimler Ag | Zylinderkopfeinheit |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE29616563U1 (de) * | 1996-09-24 | 1996-12-12 | Pafamax Brandschutztechnik GmbH, 34123 Kassel | Schacht für Abgasanlagen in Gebäuden und Bauelemente zu dessen Herstellung |
| US6584951B1 (en) * | 2001-12-06 | 2003-07-01 | General Motors Corporation | Individual hydraulic circuit modules for engine with hydraulically-controlled cylinder deactivation |
| US6557518B1 (en) * | 2002-01-18 | 2003-05-06 | General Motors Corporation | Cylinder deactivation apparatus |
| DE10310776A1 (de) | 2002-03-13 | 2003-11-13 | Stanadyne Corp | Ventilbetätigungseinstelleinrichtung mit Deaktivierung von Verriegelungskugeln |
-
2004
- 2004-11-26 FR FR0452786A patent/FR2878570B1/fr not_active Expired - Fee Related
-
2005
- 2005-10-07 EP EP05810744A patent/EP1815111A2/fr not_active Withdrawn
- 2005-10-07 WO PCT/FR2005/050827 patent/WO2006056709A2/fr not_active Ceased
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2006056709A3 * |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2878570B1 (fr) | 2007-02-23 |
| FR2878570A1 (fr) | 2006-06-02 |
| WO2006056709A3 (fr) | 2007-01-25 |
| WO2006056709A2 (fr) | 2006-06-01 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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| 17P | Request for examination filed |
Effective date: 20070319 |
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| AK | Designated contracting states |
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| AX | Request for extension of the european patent |
Extension state: AL BA HR MK YU |
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| RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: IZELFANANE, SAID, PSA PEUGEOT CITROEN |
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| 17Q | First examination report despatched |
Effective date: 20071213 |
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| DAX | Request for extension of the european patent (deleted) | ||
| GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
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| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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| 18D | Application deemed to be withdrawn |
Effective date: 20100504 |