[go: up one dir, main page]
More Web Proxy on the site http://driver.im/

CN102165148A - Electrohydraulic valve controller - Google Patents

Electrohydraulic valve controller Download PDF

Info

Publication number
CN102165148A
CN102165148A CN2009801378683A CN200980137868A CN102165148A CN 102165148 A CN102165148 A CN 102165148A CN 2009801378683 A CN2009801378683 A CN 2009801378683A CN 200980137868 A CN200980137868 A CN 200980137868A CN 102165148 A CN102165148 A CN 102165148A
Authority
CN
China
Prior art keywords
hydrovalve
control apparatus
valve control
hydraulic
release chamber
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
Application number
CN2009801378683A
Other languages
Chinese (zh)
Other versions
CN102165148B (en
Inventor
迈克尔·哈斯
尼古拉·莫雷利
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.)
Fifth Schaeffler Investment Management & CoKg GmbH
Schaeffler Technologies AG and Co KG
Original Assignee
Schaeffler Technologies AG and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Schaeffler Technologies AG and Co KG filed Critical Schaeffler Technologies AG and Co KG
Publication of CN102165148A publication Critical patent/CN102165148A/en
Application granted granted Critical
Publication of CN102165148B publication Critical patent/CN102165148B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)

Abstract

The invention relates to an electrohydraulic valve controller (1) for the variable actuation of a gas exchange valve (2) of an internal combustion engine, comprising a hydraulic valve (13), and for the purpose of emergency running properties, a further hydraulic valve (19).

Description

Electro-hydraulic valve control apparatus
Technical field
The present invention relates to a kind of electro-hydraulic valve control apparatus of operating internal-combustion engines scavenging air valve changeably that is used for.This valve control apparatus comprises:
● by the active piston of camshaft actuated,
● drive the relay piston of scavenging air valve,
● the pressure chamber that defines by active piston and relay piston, have the volume that can change,
● be connected the release chamber on the hydraulic medium supplier of internal-combustion engine,
● the pilot line that the pressure chamber is connected with the release chamber and be arranged in this pilot line can be automatically controlled hydrovalve, this hydrovalve discharges or the hydraulic medium stream of blocking-up by described pilot line,
● with pressure chamber bypass line that is connected with the release chamber and the safety check that is arranged in this bypass line, this safety check discharges by described bypass line and flows to the hydraulic medium in the pressure chamber, and blocking-up is flowed to the hydraulic medium in the release chamber by described bypass line.
Background technique
EP 0 931 912 A2 that such valve control apparatus forms by being considered as classifying and learning.The control time of scavenging air valve and the variability of range are obtained by following mode, promptly, the partial volume that act as the pressure chamber of so-called hydraulic connecting rod can infinitely be adjusted in the release chamber when hydrovalve is opened, and therewith correspondingly, the cam stroke of being scheduled to by camshaft is not fully, either partially or fully be delivered on the scavenging air valve.Therefore, the prime responsibility of the functional reliability of valve control apparatus is born by hydrovalve, and the switching function of hydrovalve must guarantee under all operating conditionss of internal-combustion engine accurately and can reproduce.
Yet, because the no longer closed shut-down that can be accompanied by one or more affiliated scavenging air valve of hydrovalve, and the fault that can not get rid of hydrovalve forever fully, so the valve control apparatus that is proposed in the document of quoting lacks the emergency operating performance that can make internal-combustion engine continue operation at least limitedly.
Summary of the invention
The invention task
Therefore, task of the present invention promptly, is improved the valve control apparatus of the described type of beginning as follows based on following aspect, that is, make this valve control apparatus also have enough emergency operating performances under the situation of hydrovalve fault.Can be understood as at this: when emergency operating, can produce equally the enough valve strokes of the successful ventilation of internal-combustion engine.
Summary of the invention
The solution of this task is obtained by the described feature of claim 1, and favourable improvement project of the present invention and design proposal can be learnt by dependent claims.Therefore, valve control apparatus should comprise other hydrovalve, described other hydrovalve is arranged in pilot line between hydrovalve and the release chamber, and this other hydrovalve is blocked when the hydrovalve mistake is opened by the hydraulic medium stream of pilot line in the release chamber.By this measure, when hydrovalve is in (for example because the mechanical failure on current interruptions or the hydrovalve) when opening lastingly, in the pressure chamber, can be formed for equally stroke is delivered to enough pressure on the scavenging air valve, method is: described other hydrovalve is closed during emergency operating, and and then stops the release of pressure chamber.
For situation useful in meaning of the present invention, that is, the mode that hydrovalve is opened with no current is constructed, and can do following setting, that is, other hydrovalve is equally can mode automatically controlled and that no current is opened constructing.The major advantage of this design is the suitable energy balance of valve control apparatus, because so described other hydrovalve can only be switched on during emergency operating.Yet, however, there is following feasible program equally, that is, it is closed and/or replace electronic control to this other hydrovalve that other hydrovalve is embodied as no current, can select hydraulic pressure, pneumatic or mechanical control.
In addition, hydrovalve should be configured to compare with described other hydrovalve obviously and open and close quickly.Because can abandon the normal function of valve control apparatus during the limited in time emergency operating,, and therefore can be configured to relatively slowly that open and close and valve with low cost so described other hydrovalve can keep lasting closure.
Description of drawings
Other features of the present invention are by following explanation and therein the picture of the embodiment of the invention is shown simplifiedly and obtains.The hydraulic pressure that unique accompanying drawing shows according to electric hydaulic valve control apparatus of the present invention opens and closes schematic diagram.
Embodiment
Disclose by hydraulic pressure switching schematic diagram in the accompanying drawings and be used for the chief component of the foundation electric hydaulic valve control apparatus 1 of the present invention of operating internal-combustion engines scavenging air valve 2 changeably.Shown is active piston 3 and relay piston 7, this active piston 3 drives by the cam 5 of Lever type cam pack 4 by camshaft 6, this relay piston 7 drives a pair of scavenging air valve that works comparably 2 by valve bridge 8 against the power of the valve spring 9 that works to closing direction, that is to say intake valve or exhaust valve.Active piston 3 and relay piston 7 define the pressure chamber 10 of hydraulic pressure, and this pressure chamber 10 is connected with the release chamber 12 of hydraulic pressure by pilot line 11.The hydrovalve 13 that is arranged in the pilot line 11, constructs with the structure of mode that can be automatically controlled and no current opening type according to the switching symbol of being drawn is responsible for: discharge or the hydraulic medium stream of pilot line 11 is passed in blocking-up, and therewith correspondingly, pressure chamber 10 has the volume that can change during operation active piston 3.The amplitude of the stepless variable of consequent valve operation is within the following boundary: boundary is that when being in closed position during the whole stroke stage of hydrovalve 13 at active piston 3, the maximum of scavenging air valve 2 is opened stroke on the one hand; Boundary is on the other hand, the most mostly is in when opening attitude when hydrovalve 13 is promoted to up to active piston 3 at least, and scavenging air valve 2 cuts off fully.
Be connected by safety check 15 on the hydraulic medium supplier 14 of internal-combustion engine, and be connected the spring-loaded accumulator 16 that the release chamber 12 on the feeding lubricating device of internal-combustion engine has known configurations at present, and the purpose for compensating the pressure chamber's 10 hydraulic medium losses that caused by leakage is connected with pressure chamber 10 by bypass line 17.At this, the effect that is arranged in the safety check 18 in the bypass line 17 is, discharge to pass the hydraulic medium stream of bypass line 17 in the pressure chamber 10, and the hydraulic medium stream of bypass line 17 in the release chamber 12 passed in blocking-up.
At following situation, promptly, hydrovalve 13 keeps opening mistakenly (as above-mentioned during internal combustion engine operation, particularly the interruption of power supply of hydrovalve 13 is thought of as reason to this) and this can cause scavenging air valve 2 to be stopped work fully, correspondingly, the internal combustion engine operation performance is unacceptable, valve control apparatus 1 comprises other hydrovalve 19 according to the present invention ground, this other hydrovalve 19 is arranged in pilot line 11 between hydrovalve 13 and the release chamber 12, and, open during that is to say valve control apparatus 1 failure-free operation normally.Yet described other hydrovalve 19 makes the emergency operating of internal-combustion engine become possibility.This emergency operating is introduced thus, promptly, to be in hydrovalve 13 backs that mistake opens closed detecting for described other hydrovalve 19, thereby make that the hydraulic medium pressure of formation no longer can be unloaded in the release chamber 12 pressure chamber 10 in, and make scavenging air valve 2 apertures sufficiently open.Then under pressure chamber's 10 complete incompressible and leak free theoretical case, be delivered on the scavenging air valve 2 fully and be coincident with above-mentioned maximum by active piston 3 predetermined strokes and open stroke.
To open and close symbol according to it is that the requirement of the transfer speed of the other hydrovalve of opening with no current 19 that can be automatically controlled can be set to be starkly lower than the requirement to hydrovalve 13 equally.Its reason is that other hydrovalve 19 only needs to be transformed into closed position from opening attitude once when emergency operating begins.Therewith correspondingly, compare with the hydrovalve 13 of obviously faster switching, described other hydrovalve 19 can be implemented basically more inexpensively.
Reference numeral
1 valve control apparatus
2 scavenging air valves
3 active pistons
4 cam packs
5 cams
6 camshafts
7 relay pistons
8 valve bridges
9 valve springs
10 pressure chambers
11 pilot line
Release chambers 12
13 hydrovalves
14 hydraulic medium supplieies
15 safety check
16 accumulators
17 bypass lines
18 safety check
19 other hydrovalves

Claims (4)

1. be used for the electro-hydraulic valve control apparatus (1) of the scavenging air valve of operating internal-combustion engines (2) changeably, comprise
● by the active piston (3) of camshaft (6) driving,
● drive the relay piston (7) of scavenging air valve (2),
● by described active piston (3) and described relay piston (7) pressure chamber (10) that define, that have the volume that can change,
● be connected the release chamber (12) on the hydraulic medium supplier (14) of described internal-combustion engine,
● the pilot line (11) that described pressure chamber (10) are connected with described release chamber (12) and be arranged in the automatically controlled hydrovalve (13) of energy in the described pilot line (11), described hydrovalve discharges or blocks the hydraulic medium that passes through described pilot line (11) and flow
● the bypass line (17) that described pressure chamber (10) are connected with described release chamber (12) and be arranged in safety check (18) in the described bypass line (17), described safety check discharges by described bypass line (17) and flows to the hydraulic medium in the pressure chamber (10), and blocking-up is flowed to the hydraulic medium in the described release chamber (12) by described bypass line (17)
● it is characterized in that, described valve control apparatus (1) comprises other hydrovalve (19), described other hydrovalve is arranged in described pilot line (11) between described hydrovalve (13) and the described release chamber (12), and described other hydrovalve is blocked when mistake is opened by the hydraulic medium stream of described pilot line (11) in the described release chamber (12) at described hydrovalve (13).
2. by the described electro-hydraulic valve control apparatus of claim 1 (1), it is characterized in that the mode that described hydrovalve (13) is opened with no current is constructed.
3. by the described electro-hydraulic valve control apparatus of claim 2 (1), it is characterized in that described other hydrovalve (19) is equally mode automatically controlled and that no current is opened constructing.
4. by the described electro-hydraulic valve control apparatus of claim 1 (1), it is characterized in that described hydrovalve (13) is constructed to such an extent that compare with described other hydrovalve (19) obviously and open and close quickly.
CN2009801378683A 2008-09-26 2009-09-15 Electrohydraulic valve controller Expired - Fee Related CN102165148B (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102008049181A DE102008049181A1 (en) 2008-09-26 2008-09-26 Electrohydraulic valve control
DE102008049181.0 2008-09-26
PCT/EP2009/061895 WO2010034643A1 (en) 2008-09-26 2009-09-15 Electrohydraulic valve controller

Publications (2)

Publication Number Publication Date
CN102165148A true CN102165148A (en) 2011-08-24
CN102165148B CN102165148B (en) 2013-07-17

Family

ID=41353850

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2009801378683A Expired - Fee Related CN102165148B (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)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106661973A (en) * 2014-04-29 2017-05-10 福特汽车萨纳伊股份有限公司 Valve timing system

Families Citing this family (8)

* Cited by examiner, † Cited by third party
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
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

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH094424A (en) * 1995-06-19 1997-01-07 Nissan Motor Co Ltd Variable valve gear for internal combustion engine
EP0931912A2 (en) * 1998-01-23 1999-07-28 C.R.F. Società Consortile per Azioni Internal combustion engine with variable hydraulic valve actuating system
KR20010031821A (en) * 1997-11-04 2001-04-16 디이젤 엔진 리타더스, 인코포레이티드 Lost motion valve actuation system
DE10048263A1 (en) * 2000-01-14 2001-07-19 Continental Teves Ag & Co Ohg Method for operating an internal combustion engine
US20030213442A1 (en) * 2002-05-14 2003-11-20 Cornell Sean O. Engine valve actuation system

Family Cites Families (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
FI101998B (en) * 1996-01-26 1998-09-30 Waertsilae Tech Oy Ab Device for controlling the function of the valves in an internal combustion engine
US6745122B2 (en) * 2000-01-14 2004-06-01 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
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
WO2011069836A1 (en) * 2009-12-08 2011-06-16 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

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH094424A (en) * 1995-06-19 1997-01-07 Nissan Motor Co Ltd Variable valve gear for internal combustion engine
KR20010031821A (en) * 1997-11-04 2001-04-16 디이젤 엔진 리타더스, 인코포레이티드 Lost motion valve actuation system
EP0931912A2 (en) * 1998-01-23 1999-07-28 C.R.F. Società Consortile per Azioni Internal combustion engine with variable hydraulic valve actuating system
DE10048263A1 (en) * 2000-01-14 2001-07-19 Continental Teves Ag & Co Ohg Method for operating an internal combustion engine
US20030213442A1 (en) * 2002-05-14 2003-11-20 Cornell Sean O. Engine valve actuation system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106661973A (en) * 2014-04-29 2017-05-10 福特汽车萨纳伊股份有限公司 Valve timing system
CN106661973B (en) * 2014-04-29 2019-04-12 福特汽车萨纳伊股份有限公司 Valve timing system

Also Published As

Publication number Publication date
KR101581068B1 (en) 2015-12-29
WO2010034643A1 (en) 2010-04-01
US20110277712A1 (en) 2011-11-17
EP2329116A1 (en) 2011-06-08
KR20110059627A (en) 2011-06-02
EP2329116B1 (en) 2014-12-17
CN102165148B (en) 2013-07-17
DE102008049181A1 (en) 2010-04-01

Similar Documents

Publication Publication Date Title
CN102165148B (en) Electrohydraulic valve controller
EP1442204B1 (en) Method and system of improving engine braking by variable valve actuation
CN106014522B (en) Variable valve actuator
JP3192200U (en) Electronically controlled hydraulic system for variable valve actuation of internal combustion engines with high-speed filling on the system high pressure side
KR100751607B1 (en) System and method for internal exhaust gas recirculation
JP4897216B2 (en) Internal combustion engine equipment
EP3388656B1 (en) Method and apparatus for combined exhaust and compression release engine braking
CN107076036B (en) Combustion engine and method for engine braking using such a combustion engine
JP2009518570A (en) Hydraulic valve drive system and method
CN104822911B (en) Gas exchanges valve gear
US8726860B2 (en) Electrohydraulic valve controller
JP2008527237A (en) Equipment for internal combustion engines
CN103147815A (en) Electro-hydraulic variable valve lift system
CN104619960A (en) Method for operating an internal combustion engine having an electrohydraulic valve control device
CN102459829B (en) A control arrangement for gas exchange in a piston engine
KR102057124B1 (en) Method and apparatus for determining exhaust brake failure
KR100963666B1 (en) Variable valve timing for a large two-stroke diesel engine with a camshaft
CN101384797A (en) A method of braking an actuator piston, and a pneumatic actuator
US10961878B2 (en) Valve train for the variable actuation of an inlet valve and an outlet valve, and internal combustion engine having a valve train of this type
KR101017794B1 (en) Electronic controlled exhaust valve actuating equipment using the mechanical hydraulic actuator for the diesel engine
CN103321759A (en) Engine, exhaust valve brake module and exhaust valve brake hydraulic control system
KR101657752B1 (en) An arrangement and a method of operating a gas exchange valve of an internal combustion engine, a cylinder head and a method of upgrading an internal combustion engine
KR20160112062A (en) Variable valve timing system for dual fuel engine
JP5870640B2 (en) Auxiliary brake device
JP2011080393A (en) Internal combustion engine

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C53 Correction of patent of invention or patent application
CB02 Change of applicant information

Address after: German Herzogenaurach

Applicant after: SCHAEFFLER TECHNOLOGIES AG & CO. KG

Address before: German Herzogenaurach

Applicant before: SCHAEFFLER TECHNOLOGIES GmbH & Co.KG

C14 Grant of patent or utility model
GR01 Patent grant
ASS Succession or assignment of patent right

Owner name: SCHAEFFLER FIFTH INVESTMENT MANAGEMENT GMBH + CO.,

Free format text: FORMER OWNER: SCHAEFFLER TECHNOLOGIES GMBH + CO. KG

Effective date: 20150804

C41 Transfer of patent application or patent right or utility model
C56 Change in the name or address of the patentee

Owner name: SCHAEFFLER TECHNOLOGY GMBH + CO. KG

Free format text: FORMER NAME: SCHAEFFLER TECHNOLOGIES GMBH + CO. KG

Owner name: SCHAEFFLER TECHNOLOGIES GMBH + CO. KG

Free format text: FORMER NAME: SCHAEFFLER FIFTH INVESTMENT MANAGEMENT GMBH + CO., KG

CP01 Change in the name or title of a patent holder

Address after: German Herzogenaurach

Patentee after: SCHAEFFLER TECHNOLOGIES GmbH & Co.KG

Address before: German Herzogenaurach

Patentee before: Fifth Schaeffler investment management GmbH & Co.KG

Address after: German Herzogenaurach

Patentee after: SCHAEFFLER TECHNOLOGIES AG & CO.KG

Address before: German Herzogenaurach

Patentee before: SCHAEFFLER TECHNOLOGIES GmbH & Co.KG

TR01 Transfer of patent right

Effective date of registration: 20150804

Address after: German Herzogenaurach

Patentee after: Fifth Schaeffler investment management GmbH & Co.KG

Address before: German Herzogenaurach

Patentee before: SCHAEFFLER TECHNOLOGIES AG & CO. KG

CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20130717

Termination date: 20190915