EP2220344A1 - Motorsteuerstrategie für hydraulischen nockenwellenversteller mit mechanischer mittenverriegelung - Google Patents
Motorsteuerstrategie für hydraulischen nockenwellenversteller mit mechanischer mittenverriegelungInfo
- Publication number
- EP2220344A1 EP2220344A1 EP08849551A EP08849551A EP2220344A1 EP 2220344 A1 EP2220344 A1 EP 2220344A1 EP 08849551 A EP08849551 A EP 08849551A EP 08849551 A EP08849551 A EP 08849551A EP 2220344 A1 EP2220344 A1 EP 2220344A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- rotor
- camshaft adjuster
- locking
- mvp
- solenoid valve
- 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
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/04—Introducing corrections for particular operating conditions
- F02D41/042—Introducing corrections for particular operating conditions for stopping the engine
-
- 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
- F01L1/02—Valve drive
- F01L1/022—Chain drive
-
- 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
- F01L2001/3445—Details relating to the hydraulic means for changing the angular relationship
- F01L2001/34453—Locking means between driving and driven members
- F01L2001/34463—Locking position intermediate between most retarded and most advanced positions
-
- 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
- F01L2001/3445—Details relating to the hydraulic means for changing the angular relationship
- F01L2001/34453—Locking means between driving and driven members
- F01L2001/34466—Locking means between driving and driven members with multiple locking devices
-
- 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
- F01L2001/3445—Details relating to the hydraulic means for changing the angular relationship
- F01L2001/34453—Locking means between driving and driven members
- F01L2001/34469—Lock movement parallel to camshaft axis
-
- 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
- F01L2001/3445—Details relating to the hydraulic means for changing the angular relationship
- F01L2001/34453—Locking means between driving and driven members
- F01L2001/34476—Restrict range locking means
-
- 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
- F01L2800/01—Starting
-
- 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
- F01L2800/03—Stopping; Stalling
-
- 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
- F01L2820/00—Details on specific features characterising valve gear arrangements
- F01L2820/04—Sensors
- F01L2820/041—Camshafts position or phase sensors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/0002—Controlling intake air
- F02D2041/001—Controlling intake air for engines with variable valve actuation
Definitions
- the invention relates to an engine control strategy for a hydraulic camshaft adjuster with mechanical center lock, in particular a hydraulic camshaft adjuster according to vane-type principle, having the features of the preamble of claim 1.
- Camshafts of internal combustion engines are usually driven by a chain or a toothed belt of crankshafts and thereby continuously adjusted in a closed loop, with typical adjustment ranges are at 40 ° to 60 ° crank angle.
- To be set crank angle are stored in maps.
- Adjustments are made z. B. hydraulic, fed from the engine oil circuit via an electrically operated control valve and allow optimized valve timing on the parameters engine load and speed. Depending on the engine concept and the number of adjusters so a significant reduction in fuel consumption and exhaust emissions and an increase in power and torque can be achieved.
- Camshafts and thus fixed rotors of a hydraulic camshaft adjuster tend to oscillate acoustically in the non-hydraulically clamped state due to alternating torques on the camshaft. This oscillation can be prevented with a mechanical connection from rotor to stator and thus to the crankshaft.
- a known such mechanical connection is that in the middle, ie between the end BREAK LATE and EARLY locked camshaft adjuster.
- Two in the rotor axially displaceable locking piston also known under the name pin, can be pressed by spring force in a locking link, which is housed opposite in an axially arranged locking cover, which is bolted to the stator and rotatably lock rotor and stator together.
- Unlocking is done hydraulically by means of oil pressure from the lubrication circuit of the motor, which is steered by controlled actuation of a solenoid valve with power to the locking piston and this moves axially from the locking link into the rotor, so that the rotor and stator are rotatable to each other.
- Non-hydraulically clamped conditions are typical of engine start-up, where the low speed of the oil pump and correspondingly low oil pressure in the engine's lubrication circuit may not be sufficient for oil pressure holding the position from rotor to stator. While the engine speed is ramping up, friction moments on the camshafts opposite their direction of rotation will result in central locking when the camshaft phaser rotor is turned off between center lock position (MVP) and EARLY end stop. However, if the rotor of the camshaft adjuster was switched off between LATE limit stop and MVP during engine stop, its adjustment takes place by friction moments exclusively in the LATE direction and the MVP can not be reached by the rotor without sufficient oil pressure.
- MVP center lock position
- US-6,450,137 B2 discloses a camshaft phaser whose rotor can be hydraulically pressed relative to the stator either to the EARLY endstop or the LATCH endstop.
- An electric control valve alternately switches to oil under pressure from a pump and a non-pressurized return to an oil reservoir alternately to the EARLY end stop or the LATCH end stop.
- the electric control valve is adjusted by a control device.
- the rotor is to be mechanically rotated from the crankshaft to the stator during engine start so that the rotor is centered with the stator. can be locked.
- US 6,684,835 B2 discloses a hydraulic camshaft adjuster, the center locking is done when stopping the engine.
- An electronic control unit detects a signal that is generated when stopping the engine and signals that reflect the state of Stator relative to the rotor.
- An electrical control valve has 5 ports of which one port pump receives the oil flow to the solenoid valve from the engine's lubricating oil circuit, one port chamber A connects the control valve and chambers A of the camshaft phaser, one port chamber B the solenoid valve with chambers B of the cam - Connects the shaft adjuster, a port pins the solenoid valve with all locking piston in the camshaft adjuster connects and a port tank oil drain from the solenoid valve connects with the lubricating oil circuit of the engine, so that this camshaft adjuster of the prior art each have a separate oil lines to the chambers A, the chambers B and all locking piston disclosed.
- Hydraulic locking of the camshaft phaser in the MVP can be achieved by using an oil temperature suitable for the operation of the engine and the engine control unit can ignite the engine immediately, the required size for this strategy being the angular position of the engine Rotor in camshaft adjuster is in front of signal "ignition off” and no additional measuring technology is required compared to conventional motors.
- the chambers A, chambers B and the pins before the center locking, are depressurized by the magnetic valve and the locking in the middle of the stator and rotor is to take place by spontaneous movements of the camshaft, which position the rotor in a suitable position turn to the stator.
- Acoustic abnormalities due to the lack of hydraulic clamping before the center lock and additional loads on timing gear, camshaft and subsequent components due to the vibrations in the unlocked state of the camshaft adjuster are unavoidable with the teaching of US 6,684,835 B2.
- the object of the invention is to provide an engine control strategy for a hydraulic camshaft adjuster with which a central locking is controlled and vibration-free.
- a motor control strategy is proposed for a hydraulic camshaft adjuster with mechanical center locking with at least one rotor and a stator, between which hydraulically loadable chambers A and chambers B are provided for controllable rotation of the rotor and stator relative to each other.
- At least two locking pistons axially displaceably mounted in the rotor can be pressed by spring force into a locking slot for the mechanical center locking of the rotor and stator.
- a hydraulic system is provided with at least one respective oil line to the chamber A, the chamber B and the locking piston of at least one electrically controllable solenoid valve, wherein the locking piston can be acted upon by controlled energizing the solenoid valve so that they can be pressed out of the locking link to the mechanical Decoupling of rotor and stator.
- At least one engine control unit which receives at least one signal "ignition off” and at least one signal for the current angular position of the camshaft adjuster when the engine is stopped, compares the angular position with reference values stored in the engine control unit, forms control commands therefrom and delivers them to the electric solenoid valve.
- the comparison values stored in the engine control unit are subdivided into four zones and in a zone a N , in which the rotor of the camshaft adjuster has an angle ⁇ ⁇ to the MVP in the LATE direction, the solenoid valve is fully energized in order to move the rotor of the camshaft adjuster in the direction of EAR to adjust and place the locking pistons on tank for locking in MVP, in a zone A R in which the rotor of the camshaft adjuster angle ⁇ to MVP in the LATE direction, the solenoid valve initially energized to the rotor of the camshaft adjuster in LATE in the zone A N to adjust and then fully energized the solenoid valve to move the rotor of the camshaft adjuster again in the direction of EAR and the locking piston to tank switch for locking in MVP, in a zone Br, in which the rotor of the camshaft adjuster an angle ⁇ ß to MVP toward early, the solenoid valve is first fully energized to the rotor of the cam
- the locking takes place hydraulically controlled up to the MVP at any time, so that the rotor controlled in the MVP and there can be done locking without acoustic abnormalities and without additional loads on timing gear, camshafts and subsequent components due to vibrations in the non-clamped state of the camshaft adjuster.
- the use of residual oil pressure at engine stop allows the locking in MVP independent of the angular position of the rotor in the camshaft adjuster at idle speed before engine stop.
- a z. B. designed as hyraulic oil pressure accumulator energy storage for locking the rotor of the camshaft adjuster, which is chargeable in engine operation and can be activated in case of insufficient oil pressure for an adjustment during the engine shutdown to support.
- the angular position of the camshaft adjuster at engine start with extremely low engine speed can only be determined with locking in MVP during engine start.
- an axial multi-grid locking is provided for a further accelerated locking of the rotor with the stator, wherein at angular positions in idle operation between LATE and center locking position with sufficient engine oil pressure, the mechanical center lock during a motor stop even without axial multi-grid locking works with a slightly greater locking time.
- FIG. 1 shows a cross section through a camshaft adjuster for a
- Engine stop strategy according to the invention shows a graph of the control characteristic and switching positions of the solenoid valve for an engine stop strategy according to the invention
- FIG. 3 shows a distribution of the adjustment angle range for an engine stop strategy according to the invention
- FIG. 4 shows a flowchart for the engine stop strategy according to the invention.
- a hydraulic camshaft adjuster 1 has a rotor 2 and a stator 3, between which a plurality of chambers 4 separated by wings 4 and chambers B are distributed uniformly over the circumference.
- Rotor 2 is rotatable with respect to stator 3.
- the wings 4 mounted in the rotor 2 interact with evenly distributed over the inner circumference of the stator 3 early and late attacks 5 together.
- axially displaceably mounted locking piston 6 - 10 are provided, which can be pressed by means of springs (not shown) in a locking link of the stator 3 for a secured against rotation connection of rotor 2 and stator 3 in MVP.
- a ring gear 11 is provided over the entire circumference of the stator 3 for a chain leading to a crankshaft (not shown).
- an electrically controllable solenoid valve (not shown) performs an oil line 12 from a port A to the chambers A, an oil line 13 from a port B to the chambers B and an oil line 14 from a port pins to the locking piston 6 - 10, by means of Oil pressure can be unlocked from the port pins are.
- the solenoid valve is pressurized with oil by a pump (not shown). Via a return (not shown), oil can flow out of the solenoid valve into a tank without pressure.
- Fig. 2 The electrically controllable solenoid valve is subdivided into three areas plotted on the abscissa of the graph: stop I for engine stop strategy for LATE shift, work area for cruise control during engine operation, and stop IL for engine stop strategy for shift toward EAR. All locking pistons 6 - 10 are in the Stop I and Stop II ranges on the tank so that the rotor can lock the phaser on engine stop in MVP. The oil pressure in the lines to the locking pistons 6 - 10 is in the range stop I: 0 ... 0.5 bar, in the working range> 0.5 bar and in the stop II range: 0.5 ...
- Locking pistons 6, 7 are completely unlocked in the design according to the example only above 0.5 bar for adjustment and controllability of the camshaft adjuster 1 in the complete angular range.
- other locking springs for the locking pistons 6 - 10 other locking piston masses, locking piston surfaces, etc., there are correspondingly different oil pressure limits.
- the rotor 2 of the camshaft adjuster 1 can not be adjusted via MVP, since the locking pistons 6 - 10 are connected to the tank and can thus lock when passing through the MVP.
- FIG. 3 For the engine stop strategy, the entire adjustment angle range of the rotor 2 in the camshaft adjuster 1 is divided into four zones A N , A R , B N and B R. Splits. Zone A N is a neutral zone in the chamber A. If the rotor 2 is in the zone A N , its distance extends to the MVP in order to lock the locking pistons 6 - 10 securely in the locking slots in the event of a pressure drop in the oil line 14. When the rotor 2 is in the zone A R , its distance ⁇ in the direction of late to the MVP is too small to lock the locking pistons 6 - 10 securely in the locking slots when there is a pressure drop in the oil line 14, so that the rotor 2 remains rotatable to the stator 3.
- the angle ⁇ can 8 ° - 12 °, z. B. 10 °.
- the rotor 2 When the rotor 2 is in the zone B N , its distance extends up to the MVP, in order to lock the locking pistons 6 - 10 securely in the locking slots when there is a pressure drop in the oil line 14, and if the rotor 2 is in the zone B R , is the distance ß in the direction of EAR until the MVP too small to lock in case of pressure drop in the oil line 14, the locking piston 6 - 10 securely in the locking latches, so that the rotor 2 remains rotatable to the stator 3.
- the angle ß can 6 ° - 10 °, z. B. 8 °, where ⁇ > ß, since friction torques act on the camshaft in the direction LATE and thus adjusting speeds in the direction of LATE are generally greater.
- Fig. 4 The locking operation during an engine stop operation is timed during normal operation of the engine at idle speed as follows:
- the driver switches off the engine and an "ignition off" signal is forwarded to the engine control unit.
- the engine control unit evaluates the current angular position of rotor 2 in camshaft adjuster 1 and compares this with the stored zone definitions given duty cycles (TV) delivered to the solenoid valve.
- TV duty cycles
- TV 100%, range: stop II
- the locking of the rotor 2 with the stator 3 in MVP with decreasing speed is done using the residual oil pressure in the engine.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Valve Device For Special Equipments (AREA)
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102007054547A DE102007054547A1 (de) | 2007-11-15 | 2007-11-15 | Motorsteuerstrategie für hydraulischen Nockenwellenversteller mit mechanischer Mittenverriegelung |
| PCT/EP2008/064542 WO2009062839A1 (de) | 2007-11-15 | 2008-10-27 | Motorsteuerstrategie für hydraulischen nockenwellenversteller mit mechanischer mittenverriegelung |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP2220344A1 true EP2220344A1 (de) | 2010-08-25 |
| EP2220344B1 EP2220344B1 (de) | 2012-03-28 |
| EP2220344B9 EP2220344B9 (de) | 2013-05-22 |
Family
ID=40297651
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP08849551.0A Not-in-force EP2220344B9 (de) | 2007-11-15 | 2008-10-27 | Motorsteuerstrategie für hydraulischen nockenwellenversteller mit mechanischer mittenverriegelung |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US8342144B2 (de) |
| EP (1) | EP2220344B9 (de) |
| KR (1) | KR101468260B1 (de) |
| CN (1) | CN101883914B (de) |
| AT (1) | ATE551505T1 (de) |
| DE (1) | DE102007054547A1 (de) |
| WO (1) | WO2009062839A1 (de) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2995346B1 (fr) * | 2012-09-12 | 2014-08-29 | Renault Sa | Procede de detection d'une defaillance d'un dispositif de decalage d'un arbre a cames |
| CN102926831A (zh) * | 2012-10-30 | 2013-02-13 | 芜湖杰锋汽车动力系统有限公司 | 一种配气调节装置 |
| DE102013219075B4 (de) * | 2013-09-23 | 2020-11-26 | Schaeffler Technologies AG & Co. KG | Multiverriegelung eines Nockenwellenverstellers |
| DE102013020940A1 (de) | 2013-12-12 | 2014-08-14 | Daimler Ag | Ventiltriebvorrichtung |
| DE102013021605A1 (de) * | 2013-12-20 | 2015-06-25 | Daimler Ag | Brennkraftmaschinenvorrichtung für eine Brennkraftmaschine |
| DE102014208598B4 (de) | 2014-05-08 | 2020-10-29 | Schaeffler Technologies AG & Co. KG | Nockenwellenversteller mit zum Erreichen eines hydraulischen Freilaufs hin- und herschaltbarem Hydraulikkammerabdichtelement |
| US9611764B2 (en) | 2014-10-21 | 2017-04-04 | Ford Global Technologies, Llc | Method and system for variable cam timing device |
| US9587525B2 (en) | 2014-10-21 | 2017-03-07 | Ford Global Technologies, Llc | Method and system for variable cam timing device |
| DE102016206322A1 (de) * | 2016-04-14 | 2017-10-19 | Continental Automotive Gmbh | Verfahren zum Entriegeln eines hydraulischen Nockenwellenverstellers und Kraftfahrzeug |
| DE112020007519T5 (de) | 2020-08-20 | 2023-06-22 | Schaeffler Technologies AG & Co. KG | Nockenphasenversteller |
| JP2025089706A (ja) * | 2023-12-04 | 2025-06-16 | 株式会社アイシン | 弁開閉時期制御装置 |
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| US6505586B1 (en) * | 1999-08-05 | 2003-01-14 | Denso Corporation | Variable valve timing control apparatus and method for engines |
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| JP2002047952A (ja) * | 2000-07-31 | 2002-02-15 | Toyota Motor Corp | 内燃機関のバルブタイミング制御装置 |
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| JP2006170085A (ja) * | 2004-12-16 | 2006-06-29 | Aisin Seiki Co Ltd | 弁開閉時期制御装置及び最低トルクの設定方法 |
| JP2006307656A (ja) * | 2005-04-26 | 2006-11-09 | Hitachi Ltd | 圧縮着火エンジンの可変動弁システム |
| DE102005036915A1 (de) * | 2005-08-05 | 2007-02-08 | Schaeffler Kg | Verfahren zum Betrieb eines hydraulischen Nockenwellenverstellers |
| DE102006004760A1 (de) * | 2006-02-02 | 2007-10-11 | Schaeffler Kg | Hydraulischer Nockenwellenversteller |
| DE102006031594A1 (de) * | 2006-07-08 | 2008-01-10 | Schaeffler Kg | Vorrichtung zur variablen Einstellung der Steuerzeiten von Gaswechselventilen einer Brennkraftmaschine |
| DE102010051054A1 (de) * | 2010-11-11 | 2012-05-16 | Schaeffler Technologies Gmbh & Co. Kg | Nockenwellenversteller für eine Brennkraftmaschine |
-
2007
- 2007-11-15 DE DE102007054547A patent/DE102007054547A1/de not_active Withdrawn
-
2008
- 2008-10-27 EP EP08849551.0A patent/EP2220344B9/de not_active Not-in-force
- 2008-10-27 WO PCT/EP2008/064542 patent/WO2009062839A1/de not_active Ceased
- 2008-10-27 AT AT08849551T patent/ATE551505T1/de active
- 2008-10-27 KR KR1020107010626A patent/KR101468260B1/ko not_active Expired - Fee Related
- 2008-10-27 US US12/743,070 patent/US8342144B2/en not_active Expired - Fee Related
- 2008-10-27 CN CN2008801160443A patent/CN101883914B/zh active Active
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2009062839A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101883914A (zh) | 2010-11-10 |
| CN101883914B (zh) | 2012-11-07 |
| EP2220344B9 (de) | 2013-05-22 |
| US20100241338A1 (en) | 2010-09-23 |
| ATE551505T1 (de) | 2012-04-15 |
| DE102007054547A1 (de) | 2009-05-20 |
| WO2009062839A1 (de) | 2009-05-22 |
| KR101468260B1 (ko) | 2014-12-02 |
| KR20100096089A (ko) | 2010-09-01 |
| US8342144B2 (en) | 2013-01-01 |
| EP2220344B1 (de) | 2012-03-28 |
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