WO2004007917A1 - Electrically driven camshaft adjuster - Google Patents
Electrically driven camshaft adjuster Download PDFInfo
- Publication number
- WO2004007917A1 WO2004007917A1 PCT/EP2003/006957 EP0306957W WO2004007917A1 WO 2004007917 A1 WO2004007917 A1 WO 2004007917A1 EP 0306957 W EP0306957 W EP 0306957W WO 2004007917 A1 WO2004007917 A1 WO 2004007917A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- gear
- adjusting
- camshaft
- shaft
- short
- Prior art date
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
-
- 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
- F01L1/352—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 bevel or epicyclic gear
-
- 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
- F01L2201/00—Electronic control systems; Apparatus or methods therefor
-
- 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
- F01L2820/02—Formulas
Definitions
- the invention relates to an adjusting device for the angle of rotation of the camshaft to the crankshaft of an internal combustion engine, in particular according to the preamble of claim 1.
- the camshaft In order to ensure a safe engine start for an internal combustion engine with a hydraulic or electric camshaft adjuster, the camshaft must be in a certain basic position to the crankshaft when starting. This is usually “late” for the intake camshaft and “early” for the exhaust camshaft.
- the camshaft In normal operation of the vehicle, the camshaft is moved to the respective base position in a controlled manner when the engine is switched off and is fixed or locked there.
- an electric adjustment motor is used for the electric camshaft adjustment and a hydraulic rotary piston adjuster for the hydraulic camshaft adjustment, which has a locking unit as a wing cell, swivel or segment wing.
- regulated adjustment of the hydraulic camshaft adjuster is impossible, so that the camshaft can be in an undefined position outside the base position.
- the camshaft In the case of hydraulic camshaft adjusters with the base position in "late", the camshaft is automatically shifted to the late base position the next time the internal combustion engine is started and the missing oil pressure due to the camshaft friction torque, which acts counter to the camshaft rotation direction. If the base position is in “early” If there is no oil pressure, the camshaft can be adjusted to the early basic position against the camshaft friction torque. This is usually done with the aid of a compensating spring, which generates a torque that is the same but opposite to the camshaft friction torque.
- DE 41 10 195 A1 describes an electrical adjusting device for the angular position of the camshaft relative to the crankshaft of an internal combustion engine, with an adjusting gear which is designed as a three-shaft gear and has a drive part fixed to the crankshaft, an output part fixed to the camshaft and an adjusting shaft.
- the adjusting shaft is non-rotatably connected to an electric adjusting motor which has a permanent magnet rotor and a stator fixed to the housing, with a stationary gear ratio between the input and output parts when the adjusting shaft is at a standstill
- Number of drive teeth Z ⁇ w is present, the size of which determines the type of transmission (plus or minus transmission) and the adjustment direction of the camshaft (early or late base position).
- This adjustment device strives for a smooth and precise setting of the camshaft position.
- a limitation of the adjustment angle is provided so that the function of the internal combustion engine can at least be maintained in the event of a failure of the adjustment motor system. However, there is no indication of reaching the base position or an emergency running position in such a case.
- the invention has for its object to provide an electric camshaft adjuster, which adjusts the camshaft to its emergency running or base position in a simple and currentless manner even if the adjusting motor or its control or power supply fails.
- the structural design of the adjustment gear allows the size of the stationary gear ratio to be determined and thus the adjusting device of the camshaft.
- the camshaft is adjusted in the direction of the early or late base or emergency running position in the event of a failure of the adjustment motor or its power supply by simply braking the adjustment shaft while the adjustment gear is rotating. This can take place during engine operation and when the internal combustion engine is running down or starting.
- the base position of the camshaft is optimally suitable for starting the engine and for low engine speeds, and is also possible for higher speeds, so that at least one workshop can be reached in this way.
- the adjustment shaft can be braked by a mechanical or an eddy current brake. However, these brakes require electrical current to operate them.
- the short-circuit according to the invention operates ⁇ brake with short-circuit current, which is generated in the towed adjusting and thus makes the short-circuit brake electrically self-sufficient. Since there is no mechanical friction, the short-circuit brake works without wear.
- Negative gearboxes have a stationary gear ratio io ⁇ 0, plus gears have a stationary gear ratio io> 0.
- positive stationary gear ratio io the input and output shafts have the same direction of rotation, with negative stationary gear ratios io opposite directions of rotation with respect to a stationary adjusting shaft and the components connected to it.
- the adjustment shaft is held in a positive gearbox with a stationary gear ratio io> 1 and the drive shaft is turned clockwise, the output shaft rotates more slowly than the drive shaft, that is, counterclockwise and thus also in the direction of the base position "late".
- Double eccentric gears are characterized by low friction, simple construction and vibration-free running.
- An advantageous embodiment of the invention is that the double eccentric gear has a camshaft-fixed cover which is firmly connected with axial pins which engage in bores of two identically constructed spur gears with line contact and that the spur gears, which are Actuator motor can be driven via a double eccentric shaft, mesh with a ring gear fixed ring gear.
- the number of teeth ZNW of each of the two identically constructed spur gears is smaller than the number of teeth ZKW of the ring gear fixed to the crankshaft (equal to the number of drive teeth), which leads to a stationary gear ratio 0 ⁇ io ⁇ 1.
- this stationary transmission ratio causes the camshaft to be adjusted in the “early” direction, as is customary with exhaust camshafts.
- Another double eccentric gear has a crankshaft-fixed drive wheel which is firmly connected with axial pins which engage in bores of two identically constructed spur gears with line contact and that the identically constructed spur gears which can be driven by the adjusting motor via a double eccentric shaft are combing with a ring gear fixed to the camshaft.
- the number of teeth ZNW of the camshaft-fixed ring gear is greater than the number of teeth ZKW of each of the identically constructed spur gears (equal to the number of drive teeth), which leads to a stationary gear ratio io> 1.
- the three phases of the adjustment motor result in a low-fluctuation torque curve of the adjustment motor with low construction costs.
- the possibility of short-circuiting one, two or all three phases enables fine regulation of the short-circuit braking torque.
- a clocked short circuit is also suitable for limiting the temperature development of the variable motor.
- the short-circuit switches are opened when a certain short-circuit current is reached and then closed automatically. This process is preferably controlled and operated by the short-circuit current itself, so that the clocking works even in the event of a failure of the adjusting motor or the voltage supply to the control device.
- the braking current can also be taken from active components, for example from an accumulator.
- the automatic closing takes place, for example, by spring force.
- FIG. 1 shows a camshaft adjusting device with an adjusting gear designed as a three-shaft gear and an electric adjusting motor which has a stator fixed to the housing;
- Figure 2 is a circuit diagram of a three-phase DC variable motor with short-circuit lines and short-circuit switches
- FIG. 3 shows a double eccentric gear with a ring gear fixed to the crankshaft
- Figure 4 shows a double eccentric gear with a camshaft-fixed ring gear.
- FIG. 1 schematically shows a camshaft adjusting device with an adjusting gear 1 and an adjusting motor 2, which serves to adjust the rotational angle position between a crankshaft (not shown) and a camshaft 3 of an internal combustion engine (not shown).
- the adjustment gear 1 is designed as a three-shaft gear with a drive part 4 fixed to the crankshaft, which has a drive wheel 7, an output part 5 fixed to the camshaft, and an adjustment shaft 6, which is connected in a rotationally fixed manner to a permanent magnet rotor 8 of the adjustment motor 2.
- the adjusting motor 2 has a stator 9 which is fixedly arranged in a housing 10.
- the camshaft 3 has a basic or emergency running position, which must be achieved for a safe start and restricted operation of the internal combustion engine. With the servomotor 2 intact, this succeeds without difficulty even after the internal combustion engine has stalled, since the servomotor 2 drives the camshaft 3 when the combustion engine is stopped or during derstarts in the base position. However, even if the adjusting motor 2 has failed, at least limited motor operation and a restart must be possible in order to be able to reach at least one workshop.
- the adjusting gear 1 and its stationary gear ratio io are designed such that by simply braking the adjusting shaft 6, the camshaft 3 comes into its basic position when the internal combustion engine is started and the internal combustion engine is thereby startable.
- FIG. 2 shows a circuit diagram of the stator 9 of the adjusting motor 2.
- the adjusting motor 2 is designed as a brushless DC motor with three phases 11 connected in a star, which have stator windings 12 and are supplied with current by a control device 13 via control lines 15 in a phase-appropriate manner.
- Short-circuit switches 16 are provided in the short-circuit lines 14, which are closed when the adjusting motor 2 is de-energized and opened when the adjusting motor 2 is energized. By closing the short-circuit switch 16, a short-circuit current flows, which serves to brake the short-circuit of the servomotor 2 operated as a generator.
- the short-circuit switches 16 can be closed individually or as a whole, as a result of which the braking force can be regulated.
- adjusting gears are shown which are designed as three-shaft gears with similar, but differently arranged components.
- Figure 3 shows a double eccentric gear 19 with a crankshaft-fixed sprocket 21, a camshaft-fixed cover 25 and an adjusting shaft which is designed as a double eccentric shaft 29. This is connected to a servomotor, not shown, via a detachable key shaft coupling 37. Wedge, polygon, tooth, double, square, and hexagonal shaft couplings are also conceivable as releasable couplings.
- the camshaft-fixed cover 25 is clamped with the aid of a central standard clamping screw 31 via a clamping sleeve 30 to a camshaft journal 38 of a camshaft 65.
- An opening 66 of the key shaft coupling 37 enables a screwing tool to access a screw head 36 of the central standard clamping screw 31.
- the angle of rotation position between the camshaft 65 and the camshaft-fixed cover 25 is fixed by a fixing pin 39 which is press-fitted in aligned bores in the cover 25 and the camshaft journal 38.
- the clamping sleeve 30 also serves as a bearing surface for a needle sleeve 32 of the double eccentric shaft 29.
- This has two identical, but offset by 180 ° and thus fully balanced eccentric 67, which drive two identical spur gears 28 via plain bearings 33.
- the spur gears 28 mesh with an internal toothing 22 of a ring gear fixed to the crankshaft 20, which is formed in one piece with the chain wheel 21.
- the camshaft-fixed cover 25 has axial bores 63 into which pins 26 are pressed. These pass through axial bores 27 of identically constructed spur gears 28 and project through axial bores 68 of an end cover 34.
- the axial bores 63, 68 are aligned and lie at a uniform distance on a circle around the axis of rotation 64 of the camshaft adjuster.
- the axial bores 27 have a diameter which is twice the eccentricity of the eccentrics 67 than the pins 26, which have a line contact on the inner circumference of the axial bores 27.
- the end cover 34 serves to end the double eccentric gear 19 and to axially fix the double eccentric shaft 29, the spur gears 28 and the ring gear 20. It is axially fixed by retaining rings 35. These sit in grooves 78 which are arranged on the ends of the pins 26 which protrude from the axial bores 68 of the end cover 34. The position of the grooves 78 determines the distance between the inner surfaces 79, 80 of the cover 25 and the end cover 34. The axial play required for the relative movement to the corresponding contact surfaces of the double eccentric shaft 29, the spur gears 28 and the ring gear 20 is taken into account.
- the ring gear 20 is mounted on the cover 25 in a slide bearing 43 which, among other things, absorbs the forces of the chain wheel 21.
- This is formed in one piece with the ring gear 20 and is connected via a chain to the crankshaft of the internal combustion engine in a rotationally fixed connection, from which it is driven at half the crankshaft speed.
- the drive torque of the chain wheel 21 is transmitted to the cover 25 and the cam shaft 65 via the spur gears 28 and the pins 26.
- the number of pins 26 depends on the level of the drive torque.
- the double eccentric gear 19 is lubricated by engine lubricating oil. This passes from an inflow line 40 of the camshaft journal 38 into the needle sleeve 32 and from there by centrifugal force via radial lubricating oil bores 41 in slide bearings 33, into the axial bores 27, to the internal toothing 22, to the sliding camp 43 and through end bores 23, 24 in the engine compartment.
- the double eccentric shaft 29 is deoiled through radial outflow bores 42.
- the double eccentric gear 19 is a positive gear, that is, the direction of rotation of the sprocket 21 and camshaft 64 are the same. Since each of the spur gears 28 has a smaller number of teeth ZNW than the number of teeth ZKW of the ring gear fixed to the crankshaft 20, a stationary gear ratio results:
- the speed of the double eccentric shaft 29 is lower than that of the chain wheel 21, for example due to short-circuit braking of the adjusting motor, then its speed is lower than that of the camshaft 65, as a result of which it is adjusted in the "early" direction.
- FIG. 4 shows another double eccentric gear 44, with a chain wheel 46 fixed to the crankshaft, a ring gear fixed to the camshaft 51 and an adjusting shaft designed as a double eccentric shaft 50.
- This is connected to the adjusting motor, not shown, via a releasable spline coupling 62.
- the double eccentric gear 44 is braced by a central special clamping screw 54 with a camshaft journal 55 of a camshaft 69.
- the angle of rotation position between the camshaft 69 and the double eccentric gear 44 is determined by a fixing pin 60, which is press-fitted into aligned bores in the ring gear 51 and the camshaft journal 55.
- the central special clamping screw 54 can be tightened through the spline coupling 62.
- a cylindrical screw head 53 of the special clamping screw 54 also serves as a bearing surface for the needle sleeve 57 of the double eccentric shaft 50, which is extremely short. It in turn has two identical eccentrics 70, offset by 180 °, which drive two identically constructed spur gears 49 via roller bearings 56.
- the roller bearings 56 can also be replaced by plain bearings, which save costs and space, but have higher friction.
- the spur gears 49 mesh with an internal toothing 52 of the ring gear fixed to the camshaft 51.
- a drive wheel 45 fixed to the crankshaft is on the circumference thereof arranged, with a peripheral part 75 which is integrally formed with the sprocket 46 and a side part 76. The latter serves, among other things, as a side closure of the double eccentric gear 44.
- the peripheral part 75 is mounted on a slide bearing 58 on the circumference of the ring gear 51.
- the side part 76 has axial bores 77, into which axial pins 47 are pressed, which engage in bores 48 of the spur gears 49 as in FIG. 3 and transmit the drive torque of the drive wheel 45 via the spur gears 49 to the ring gear 51 and to the camshaft 69.
- crankshaft-fixed drive wheel 45 and with it the spur gears 49 and the double eccentric shaft 50 are axially fixed by a snap ring 59. This sits in a radial groove 71 of the drive shaft 45 fixed to the crankshaft and lies with a flank against an end face 72 of the ring gear 51 near the camshaft. The end 73 of the ring gear 45 remote from the camshaft rests with play on the axial inside 74 of the drive wheel 45. This game enables the relative movement of ring gear 51, drive gear 45, spur gears 49 and double eccentric shaft 50.
- the double eccentric gear 44 is lubricated, as in the double eccentric gear 19, through an inflow bore 61 to the needle sleeve 57 and from there by centrifugal force to the other components.
- the double eccentric gear 44 is also a plus gear. Since the number of teeth ZNW of the ring gear fixed to the camshaft 52 is larger than the number of teeth ZKW of each of the identically constructed spur gears 49, a stationary gear ratio results:
- the camshaft 69 rotates slower than this and thus adjusts to "late".
- the double eccentric gear 19 serves as an adjustment gear of an exhaust camshaft with a base position "early”
- the other double eccentric gear 44 serves as an adjustment gear of an intake camshaft with a base position "late”.
- Adjustment motor 33 plain bearings
- Adjustment shaft 37 key shaft coupling
- Control unit 44 another double eccentric
- Control line 45 crankshaft-proof drive wheel
- Double eccentric gear 49 Spur gear crankshaft-proof ring gear 50 Double eccentric shaft
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve Device For Special Equipments (AREA)
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE50311057T DE50311057D1 (en) | 2002-07-11 | 2003-07-01 | CAMSHAFT ADJUSTER WITH ELECTRIC DRIVE |
AU2003280982A AU2003280982A1 (en) | 2002-07-11 | 2003-07-01 | Electrically driven camshaft adjuster |
JP2004520444A JP2005532503A (en) | 2002-07-11 | 2003-07-01 | Cam shaft adjusting device with electric drive |
EP03740392A EP1521899B1 (en) | 2002-07-11 | 2003-07-01 | Electrically driven camshaft adjuster |
KR1020047021297A KR100966770B1 (en) | 2002-07-11 | 2003-07-01 | Electrically driven camshaft adjuster |
US11/018,449 US7089897B2 (en) | 2002-07-11 | 2004-12-20 | Electrically driven camshaft adjuster |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10231226.5 | 2002-07-11 | ||
DE10231226 | 2002-07-11 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/018,449 Continuation US7089897B2 (en) | 2002-07-11 | 2004-12-20 | Electrically driven camshaft adjuster |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004007917A1 true WO2004007917A1 (en) | 2004-01-22 |
Family
ID=29796254
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2003/006957 WO2004007917A1 (en) | 2002-07-11 | 2003-07-01 | Electrically driven camshaft adjuster |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1521899B1 (en) |
JP (1) | JP2005532503A (en) |
AU (1) | AU2003280982A1 (en) |
DE (2) | DE10257706A1 (en) |
WO (1) | WO2004007917A1 (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2005095765A1 (en) * | 2004-03-26 | 2005-10-13 | Schaeffler Kg | Electric camshaft adjuster comprising a pancake motor |
WO2006005406A1 (en) * | 2004-07-10 | 2006-01-19 | Schaeffler Kg | Electrically driven camshaft adjuster |
WO2006053513A1 (en) * | 2004-11-16 | 2006-05-26 | Schaeffler Kg | Process for adjusting the angular position of the camshaft of a reciprocating internal combustion engine relative to the crankshaft |
WO2006074746A1 (en) * | 2004-12-23 | 2006-07-20 | Schaeffler Kg | Device for modifying the control times of an internal combustion engine |
JP2008525686A (en) * | 2004-12-23 | 2008-07-17 | シエツフレル コマンディートゲゼルシャフト | Device for changing the control time of an internal combustion engine |
DE102008050824A1 (en) | 2008-10-08 | 2010-04-15 | Schaeffler Kg | Emergency brake for use in electromechanical adjusting device for camshaft of internal combustion engine, has brake disk or magnet housing moved between free-running and braking positions by magnetic force generated by energizing coil |
EP2520772A3 (en) * | 2011-05-02 | 2013-02-20 | Magna Powertrain AG & Co. KG | Camshaft adjuster with emergency operation device |
WO2015117580A3 (en) * | 2014-02-05 | 2015-10-08 | Schaeffler Technologies AG & Co. KG | Camshaft adjuster and method for operating a camshaft adjuster |
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DE10352361B4 (en) * | 2003-11-10 | 2020-08-27 | Schaeffler Technologies AG & Co. KG | Camshaft adjuster with electric drive |
DE10355560A1 (en) * | 2003-11-28 | 2005-08-11 | Daimlerchrysler Ag | Adjusting device for a camshaft of an internal combustion engine |
DE112005000299B4 (en) * | 2004-03-26 | 2020-02-20 | Schaeffler Technologies AG & Co. KG | Electric camshaft adjuster with disc motor |
DE102004038171A1 (en) * | 2004-08-06 | 2006-03-16 | Daimlerchrysler Ag | Device for adjusting a camshaft and method for operating a device for adjusting a camshaft |
DE102004043548B4 (en) * | 2004-09-09 | 2013-04-18 | Daimler Ag | Device for angular adjustment between two rotating, drive-connected elements |
DE102004051427A1 (en) * | 2004-10-22 | 2006-05-11 | Ina-Schaeffler Kg | Internal combustion engine operating method, involves adjusting one of three adjusting units that is not failed in case of failure of one unit so that standard adjustment range of unit is shifted into changed fail-safe adjustment range |
DE102004061674B4 (en) | 2004-10-22 | 2019-09-12 | Schaeffler Technologies AG & Co. KG | Method for operating an internal combustion engine |
DE102004062035A1 (en) | 2004-12-23 | 2006-07-27 | Schaeffler Kg | Device for changing the timing of an internal combustion engine |
WO2006074627A1 (en) * | 2005-01-13 | 2006-07-20 | Schaeffler Kg | Power supply device for an electric motor method for operation of an electric motor |
DE102005018956A1 (en) * | 2005-04-23 | 2006-11-23 | Schaeffler Kg | Device for adjusting the camshaft of an internal combustion engine |
JP4210945B2 (en) * | 2005-07-12 | 2009-01-21 | 株式会社デンソー | Valve timing adjustment device |
DE102006007584A1 (en) * | 2006-02-18 | 2007-08-30 | Schaeffler Kg | Camshaft adjuster with a superposition gearbox |
DE102008039008A1 (en) * | 2008-08-21 | 2010-02-25 | Schaeffler Kg | Method for adjusting a camshaft of an internal combustion engine, camshaft adjusting system and internal combustion engine with an adjustable camshaft |
JP6042233B2 (en) * | 2013-03-01 | 2016-12-14 | 日立オートモティブシステムズ株式会社 | Valve timing control system for internal combustion engine |
DE102013220221B4 (en) * | 2013-10-08 | 2020-12-03 | Schaeffler Technologies AG & Co. KG | Camshaft adjustment device |
DE102014207630B4 (en) | 2014-04-23 | 2024-02-01 | Schaeffler Technologies AG & Co. KG | Drive wheel for accommodating a camshaft adjuster gear |
JP6252388B2 (en) | 2014-07-11 | 2017-12-27 | スズキ株式会社 | Engine valve gear |
DE102016100079B3 (en) * | 2016-01-04 | 2017-06-01 | Pierburg Gmbh | Camshaft phasing device and method for operating such |
JP6154521B2 (en) * | 2016-06-27 | 2017-06-28 | 日立オートモティブシステムズ株式会社 | Valve timing control system for internal combustion engine |
DE102017111949A1 (en) | 2017-05-31 | 2018-12-06 | Schaeffler Technologies AG & Co. KG | Electromechanical camshaft adjuster |
JP7275635B2 (en) * | 2019-02-22 | 2023-05-18 | 株式会社デンソー | Eccentric oscillating reduction gear |
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DE4110195A1 (en) * | 1991-03-28 | 1992-10-01 | Schaeffler Waelzlager Kg | Camshaft advancer for improving efficiency of combustion engine - uses slip-ring-free electric motor to alter position of camshaft relative to camshaft gear using planetary gearbox |
US6257186B1 (en) * | 1999-03-23 | 2001-07-10 | Tcg Unitech Aktiengesellschaft | Device for adjusting the phase angle of a camshaft of an internal combustion engine |
US20020053327A1 (en) * | 2000-11-04 | 2002-05-09 | Jens Schafer | Electrically driven device for angular adjustment of a shaft relative to its drive |
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DE3638527A1 (en) * | 1986-11-11 | 1988-05-19 | Irm Antriebstech Gmbh | Device for the adjustment of the camshaft of a valve-timed internal combustion engine during engine operation |
DE19910210A1 (en) * | 1999-03-09 | 2000-09-14 | Gkn Sinter Metals Holding Gmbh | Device to vary the phase position of crank shaft relative to camshaft of piston engines has driven and drive pulley on central rotary shaft, and planetary gear |
-
2002
- 2002-12-11 DE DE2002157706 patent/DE10257706A1/en not_active Withdrawn
-
2003
- 2003-07-01 WO PCT/EP2003/006957 patent/WO2004007917A1/en active Application Filing
- 2003-07-01 JP JP2004520444A patent/JP2005532503A/en active Pending
- 2003-07-01 DE DE50311057T patent/DE50311057D1/en not_active Expired - Lifetime
- 2003-07-01 AU AU2003280982A patent/AU2003280982A1/en not_active Abandoned
- 2003-07-01 EP EP03740392A patent/EP1521899B1/en not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4110195A1 (en) * | 1991-03-28 | 1992-10-01 | Schaeffler Waelzlager Kg | Camshaft advancer for improving efficiency of combustion engine - uses slip-ring-free electric motor to alter position of camshaft relative to camshaft gear using planetary gearbox |
US6257186B1 (en) * | 1999-03-23 | 2001-07-10 | Tcg Unitech Aktiengesellschaft | Device for adjusting the phase angle of a camshaft of an internal combustion engine |
US20020053327A1 (en) * | 2000-11-04 | 2002-05-09 | Jens Schafer | Electrically driven device for angular adjustment of a shaft relative to its drive |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2005095765A1 (en) * | 2004-03-26 | 2005-10-13 | Schaeffler Kg | Electric camshaft adjuster comprising a pancake motor |
JP2007530850A (en) * | 2004-03-26 | 2007-11-01 | シエツフレル コマンディートゲゼルシャフト | Electric camshaft adjuster with disk rotor type motor |
WO2006005406A1 (en) * | 2004-07-10 | 2006-01-19 | Schaeffler Kg | Electrically driven camshaft adjuster |
US7597075B2 (en) | 2004-07-10 | 2009-10-06 | Schaeffler Kg | Electrically driven camshaft adjuster |
WO2006053513A1 (en) * | 2004-11-16 | 2006-05-26 | Schaeffler Kg | Process for adjusting the angular position of the camshaft of a reciprocating internal combustion engine relative to the crankshaft |
US7954466B2 (en) | 2004-11-16 | 2011-06-07 | Schaeffler Kg | Process for adjusting the angular position of the camshaft of a reciprocating internal combustion engine relative to the crankshaft |
WO2006074746A1 (en) * | 2004-12-23 | 2006-07-20 | Schaeffler Kg | Device for modifying the control times of an internal combustion engine |
JP2008525686A (en) * | 2004-12-23 | 2008-07-17 | シエツフレル コマンディートゲゼルシャフト | Device for changing the control time of an internal combustion engine |
DE102008050824A1 (en) | 2008-10-08 | 2010-04-15 | Schaeffler Kg | Emergency brake for use in electromechanical adjusting device for camshaft of internal combustion engine, has brake disk or magnet housing moved between free-running and braking positions by magnetic force generated by energizing coil |
EP2520772A3 (en) * | 2011-05-02 | 2013-02-20 | Magna Powertrain AG & Co. KG | Camshaft adjuster with emergency operation device |
WO2015117580A3 (en) * | 2014-02-05 | 2015-10-08 | Schaeffler Technologies AG & Co. KG | Camshaft adjuster and method for operating a camshaft adjuster |
US9920660B2 (en) | 2014-02-05 | 2018-03-20 | Schaeffler Technologies AG & Co. KG | Camshaft adjuster and method for operating a camshaft adjuster |
Also Published As
Publication number | Publication date |
---|---|
AU2003280982A1 (en) | 2004-02-02 |
EP1521899B1 (en) | 2009-01-07 |
DE10257706A1 (en) | 2004-01-29 |
EP1521899A1 (en) | 2005-04-13 |
DE50311057D1 (en) | 2009-02-26 |
JP2005532503A (en) | 2005-10-27 |
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