EP2329116A1 - Electrohydraulic valve controller - Google Patents
Electrohydraulic valve controllerInfo
- Publication number
- EP2329116A1 EP2329116A1 EP09782988A EP09782988A EP2329116A1 EP 2329116 A1 EP2329116 A1 EP 2329116A1 EP 09782988 A EP09782988 A EP 09782988A EP 09782988 A EP09782988 A EP 09782988A EP 2329116 A1 EP2329116 A1 EP 2329116A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- valve
- hydraulic
- hydraulic valve
- pressure relief
- control
- 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
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L9/00—Valve-gear or valve arrangements actuated non-mechanically
- F01L9/10—Valve-gear or valve arrangements actuated non-mechanically by fluid means, e.g. hydraulic
- F01L9/11—Valve-gear or valve arrangements actuated non-mechanically by fluid means, e.g. hydraulic in which the action of a cam is being transmitted to a valve by a liquid column
- F01L9/12—Valve-gear or valve arrangements actuated non-mechanically by fluid means, e.g. hydraulic in which the action of a cam is being transmitted to a valve by a liquid column with a liquid chamber between a piston actuated by a cam and a piston acting on a valve stem
- F01L9/14—Valve-gear or valve arrangements actuated non-mechanically by fluid means, e.g. hydraulic in which the action of a cam is being transmitted to a valve by a liquid column with a liquid chamber between a piston actuated by a cam and a piston acting on a valve stem the volume of the chamber being variable, e.g. for varying the lift or the timing of a valve
-
- 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
- F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
- F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
- F01L1/3442—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using hydraulic chambers with variable volume to transmit the rotating force
- F01L2001/34423—Details relating to the hydraulic feeding circuit
- F01L2001/34446—Fluid accumulators for the feeding circuit
-
- 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
- F01L2800/00—Methods of operation using a variable valve timing mechanism
- F01L2800/12—Fail safe operation
Definitions
- the invention relates to an electro-hydraulic valve control for the variable actuation of a gas exchange valve of an internal combustion engine.
- the valve control comprises: a master piston driven by a camshaft,
- control line connecting the pressure chamber with the pressure relief chamber and an electrically controllable hydraulic valve arranged therein, which releases or blocks a hydraulic fluid flow through the control line
- valve control is apparent from the EP 0 931 912 A2 considered as generic.
- the variability of the timing and the maximum stroke of the gas exchange valve is achieved in that a partial volume of acting as a so-called hydraulic linkage pressure chamber is continuously adjustable with the hydraulic valve open in the pressure relief chamber and accordingly the camshaft predetermined cam lift completely, partially or not at all to the gas exchange valve is transmitted.
- a key responsibility for the reliability of the valve control therefore assumes the hydraulic valve whose switching function must be ensured under all operating conditions of the engine precise and reproducible.
- the present invention is therefore based on the object, a Ventilsteue- tion of the type mentioned in such a way that it has a sufficient emergency running even in case of malfunction of the hydraulic valve. This is to be understood that even in run-flat operation sufficient for a successful change of charge of the internal combustion engine valve lift can be generated.
- the valve control should comprise a further hydraulic valve which is arranged in the control line between the hydraulic valve and the pressure relief space and which blocks the hydraulic fluid flow through the control line into the pressure relief space when the hydraulic valve is open incorrectly.
- the hydraulic valve is formed normally open
- the further hydraulic valve is also designed to be electrically controlled and normally open.
- a significant advantage of this design is the favorable energy balance of the valve control, since then the further hydraulic valve would be powered only during the emergency operation. Nevertheless, there is also the possibility of providing the further hydraulic valve as a normally closed version and / or instead of selecting electrical control of a hydraulic, pneumatic or mechanical control.
- the hydraulic valve should be designed much faster switching than the other hydraulic valve. Since can be dispensed with the normal functionality of the valve control during the limited-time emergency operation, the other hydraulic valve can remain permanently closed and thus be designed as a comparatively slow-switching and cost-effective valve.
- FIGURE shows a hydraulic circuit diagram of an electrohydraulic valve control according to the invention.
- an electro-hydraulic valve control 1 for the variable actuation of a gas exchange valve 2 of an internal combustion engine are disclosed on the basis of a hydraulic circuit diagram. Shown are a master piston 3, which is driven by a cam-like cam follower 4 by a cam 5 of a camshaft 6, and a slave piston 7, by means of a valve bridge 8, a pair of identical gas exchange valves 2, i. Inlet or exhaust valves, against the force acting in the closing direction of the valve springs 9 drives.
- the master piston 3 and the slave piston 7 define a hydraulic pressure chamber 10, which is connected via a control line 11 with a hydraulic pressure relief chamber 12.
- An arranged in the control line 11 hydraulic valve 13 which is formed according to the drawn circuit symbol electrically energized and in open flow construction ensures that a hydraulic fluid flow is released or blocked by the control line 11 therethrough and accordingly the pressure chamber 10 a variable volume during having the operation of the master piston 3.
- the stepless variability of the valve actuation produced thereby extends within the limits of the maximum opening stroke of the gas exchange valves 2 on the one hand, when the hydraulic valve 13 is in the closed position during the entire lifting phase of the master piston 3, and complete shutdown of the gas exchange valves 2, when the hydraulic valve 13 at least up to the maximum elevation of the master piston 3 is in the open position.
- the pressure relief chamber 12 which is connected to a hydraulic fluid supply 14 of the internal combustion engine and in the present case to its lubricant supply by means of a check valve 15 has a spring-loaded pressure Memory 16 known construction and is for the purpose of balancing leakage-related hydraulic fluid losses from the pressure chamber 10 via a bypass line 17 to the pressure chamber 10 is connected.
- a non-return valve 18 arranged in the bypass line 17 causes a flow of hydraulic fluid through the bypass pipe 17 to be released into the pressure chamber 10 and blocked in the pressure relief chamber 12.
- the valve control 1 comprises a further hydraulic valve 19 which is arranged in the control line 11 between the hydraulic valve 13 and the pressure relief chamber 12 and during the normal, ie error-free operation of the valve control 1 is open.
- the further hydraulic valve 19 allows emergency operation of the internal combustion engine.
- the further hydraulic valve 19 which is also electrically controlled and normally open according to its switching symbol, significantly lower requirements than the hydraulic valve 13 can be made. This is due to the fact that the further hydraulic valve 19 only has to switch from the open position to the closed position once at the beginning of the emergency operation. Accordingly, the further hydraulic valve 19 be executed much cheaper than the much faster switching hydraulic valve 13.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve Device For Special Equipments (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102008049181A DE102008049181A1 (en) | 2008-09-26 | 2008-09-26 | Electrohydraulic valve control |
PCT/EP2009/061895 WO2010034643A1 (en) | 2008-09-26 | 2009-09-15 | Electrohydraulic valve controller |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2329116A1 true EP2329116A1 (en) | 2011-06-08 |
EP2329116B1 EP2329116B1 (en) | 2014-12-17 |
Family
ID=41353850
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09782988.1A Not-in-force EP2329116B1 (en) | 2008-09-26 | 2009-09-15 | Electrohydraulic valve controller |
Country Status (6)
Country | Link |
---|---|
US (1) | US20110277712A1 (en) |
EP (1) | EP2329116B1 (en) |
KR (1) | KR101581068B1 (en) |
CN (1) | CN102165148B (en) |
DE (1) | DE102008049181A1 (en) |
WO (1) | WO2010034643A1 (en) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102010022346A1 (en) | 2010-06-01 | 2011-12-01 | Schaeffler Technologies Gmbh & Co. Kg | Electrohydraulic valve control |
US8701607B2 (en) * | 2011-08-25 | 2014-04-22 | Chrysler Group Llc | System and method for engine valve lift strategy |
DE102012221354A1 (en) | 2012-11-22 | 2013-01-24 | Schaeffler Technologies AG & Co. KG | Hydraulic unit for cylinder head of internal combustion engine with hydraulically variable gas exchange valve train, has hydraulic connection, which is provided between high pressure chamber and medium-pressure chamber |
DE102013100632A1 (en) * | 2013-01-22 | 2014-07-24 | Lsp Innovative Automotive Systems Gmbh | Variable electrohydraulic valve control |
RU2016146472A (en) * | 2014-04-29 | 2018-05-29 | Форд Отомотив Санайи Аноним Ширкети | VALVE DISTRIBUTION SYSTEM |
DE102015216866A1 (en) | 2015-09-03 | 2017-03-09 | Schaeffler Technologies AG & Co. KG | Electrohydraulic valve control with variable valve lift and heat engine |
DE102016218918B4 (en) * | 2016-09-29 | 2018-09-13 | Schaeffler Technologies AG & Co. KG | Internal combustion engine with hydraulically variable gas exchange valve drive |
US10233795B2 (en) * | 2017-02-15 | 2019-03-19 | Schaeffler Technologies AG & Co. KG | Bypass valve for pressure oscillation control |
DE102017005069A1 (en) | 2017-05-22 | 2018-11-22 | Bernd Niethammer | Device for adjusting the stroke of a valve of internal combustion engines |
Family Cites Families (32)
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JPH0612058B2 (en) * | 1984-12-27 | 1994-02-16 | トヨタ自動車株式会社 | Variable valve timing lift device |
DE3532549A1 (en) * | 1985-09-12 | 1987-03-19 | Bosch Gmbh Robert | VALVE CONTROL DEVICE |
US4708406A (en) * | 1985-10-04 | 1987-11-24 | Nippondenso Co., Ltd. | Hydraulic braking system with malfunction alarm junction |
US4697558A (en) * | 1986-02-18 | 1987-10-06 | Meneely Vincent A | Compression relief engine brake |
JPH0357805A (en) * | 1989-07-26 | 1991-03-13 | Fuji Heavy Ind Ltd | Variable valve timing device |
DE3929072A1 (en) * | 1989-09-01 | 1991-03-07 | Bosch Gmbh Robert | VALVE CONTROL DEVICE WITH SOLENOID VALVE FOR INTERNAL COMBUSTION ENGINES |
DE3939066A1 (en) * | 1989-11-25 | 1991-05-29 | Bosch Gmbh Robert | ELECTROHYDRAULIC VALVE CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINES |
DE4206696C2 (en) * | 1992-03-04 | 2000-12-14 | Bosch Gmbh Robert | Hydraulic valve control device for engine valves |
JPH094424A (en) * | 1995-06-19 | 1997-01-07 | Nissan Motor Co Ltd | Variable valve gear for internal combustion engine |
FI101998B1 (en) * | 1996-01-26 | 1998-09-30 | Taimo Tapio Stenman | Arrangement for controlling the functioning of the valves in an internal combustion engine |
WO1999023378A1 (en) * | 1997-11-04 | 1999-05-14 | Diesel Engine Retarders, Inc. | Lost motion valve actuation system |
ITTO980060A1 (en) | 1998-01-23 | 1999-07-23 | Fiat Ricerche | IMPROVEMENTS ON INTENRE COMBUSTION ENGINES WITH VARIABLE ACTING VALVES. |
WO2001051775A2 (en) * | 2000-01-14 | 2001-07-19 | Continental Teves Ag & Co. Ohg | Valve synchronisation for an internal combustion engine by means of exhaust gas values and a lambda probe |
DE10048263A1 (en) * | 2000-01-14 | 2001-07-19 | Continental Teves Ag & Co Ohg | Method for operating an internal combustion engine |
DE10113722A1 (en) * | 2001-03-21 | 2002-09-26 | Mahle Ventiltrieb Gmbh | Hydraulic actuator drive for internal combustion engine inlet and exhaust valves has pump that feeds discontinuously with exclusively direct hydraulic connection to valve to be operated |
NO315034B1 (en) * | 2001-06-29 | 2003-06-30 | Statoil Asa | Method and system for connecting a submarine buoy to a vessel |
ITTO20010660A1 (en) * | 2001-07-06 | 2003-01-06 | Fiat Ricerche | MULTI-CYLINDER DIESEL ENGINE WITH VARIABLE VALVE OPERATION. |
DE10155669A1 (en) * | 2001-11-13 | 2003-05-22 | Bosch Gmbh Robert | Device for controlling at least one gas exchange valve |
US7069887B2 (en) * | 2002-05-14 | 2006-07-04 | Caterpillar Inc. | Engine valve actuation system |
ITTO20020568A1 (en) * | 2002-07-01 | 2004-01-02 | Fiat Ricerche | INTERNAL COMBUSTION ENGINE WITH ELECTRONICALLY CONTROLLED HYDRAULIC SYSTEM TO OPERATE VALVES AND MEANS TO COMPENSATE FOR CHANGES |
DE10303360A1 (en) * | 2003-01-29 | 2004-08-19 | O & K Orenstein & Koppel Gmbh | Hydraulic system for displacement-controlled linear drives |
DE10340505B4 (en) * | 2003-09-03 | 2005-12-15 | Sauer-Danfoss Aps | Valve arrangement for controlling a hydraulic drive |
US7213553B2 (en) * | 2004-11-12 | 2007-05-08 | Detroit Diesel Corporation | Internal EGR for an internal combustion engine |
JP5011816B2 (en) * | 2006-05-15 | 2012-08-29 | いすゞ自動車株式会社 | Variable valve drive |
DE102006053703A1 (en) * | 2006-11-15 | 2008-06-05 | Uwe Hammer | Valve i.e. gas exchange valve, mechanism for use in internal combustion engine of motor vehicle, has control shaft with control contour rotated with cam shaft and actuating control valve, which controls oil flow |
US20090308340A1 (en) * | 2008-06-11 | 2009-12-17 | Gm Global Technology Operations, Inc. | Cam-Driven Hydraulic Lost-Motion Mechanisms for Overhead Cam and Overhead Valve Valvetrains |
DE102009011983A1 (en) * | 2009-03-05 | 2010-09-09 | Schaeffler Technologies Gmbh & Co. Kg | Hydraulic unit for a cylinder head of an internal combustion engine with hydraulically variable gas exchange valve drive |
US8069828B2 (en) * | 2009-08-13 | 2011-12-06 | International Engine Intellectual Property Company, Llc | Intake valve closing hydraulic adjuster |
EP2510201B1 (en) * | 2009-12-08 | 2015-01-07 | Schaeffler Technologies GmbH & Co. KG | Internal combustion engine having electrohydraulic valve control and method for operating said internal combustion engine |
DE102010020754A1 (en) * | 2010-05-17 | 2011-11-17 | Schaeffler Technologies Gmbh & Co. Kg | Method and control device for determining a viscosity characteristic of an oil |
DE102010022346A1 (en) * | 2010-06-01 | 2011-12-01 | Schaeffler Technologies Gmbh & Co. Kg | Electrohydraulic valve control |
KR101198799B1 (en) * | 2010-09-20 | 2012-11-12 | 현대자동차주식회사 | Engine that is equipped with variable valve device |
-
2008
- 2008-09-26 DE DE102008049181A patent/DE102008049181A1/en not_active Withdrawn
-
2009
- 2009-09-15 CN CN2009801378683A patent/CN102165148B/en not_active Expired - Fee Related
- 2009-09-15 KR KR1020117006852A patent/KR101581068B1/en active IP Right Grant
- 2009-09-15 US US13/121,257 patent/US20110277712A1/en not_active Abandoned
- 2009-09-15 WO PCT/EP2009/061895 patent/WO2010034643A1/en active Application Filing
- 2009-09-15 EP EP09782988.1A patent/EP2329116B1/en not_active Not-in-force
Non-Patent Citations (1)
Title |
---|
See references of WO2010034643A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE102008049181A1 (en) | 2010-04-01 |
KR101581068B1 (en) | 2015-12-29 |
US20110277712A1 (en) | 2011-11-17 |
KR20110059627A (en) | 2011-06-02 |
CN102165148A (en) | 2011-08-24 |
EP2329116B1 (en) | 2014-12-17 |
WO2010034643A1 (en) | 2010-04-01 |
CN102165148B (en) | 2013-07-17 |
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