WO2018068875A1 - Système de distribution - Google Patents

Système de distribution Download PDF

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Publication number
WO2018068875A1
WO2018068875A1 PCT/EP2017/001013 EP2017001013W WO2018068875A1 WO 2018068875 A1 WO2018068875 A1 WO 2018068875A1 EP 2017001013 W EP2017001013 W EP 2017001013W WO 2018068875 A1 WO2018068875 A1 WO 2018068875A1
Authority
WO
WIPO (PCT)
Prior art keywords
switching
switching unit
unit
sensor
camshaft
Prior art date
Application number
PCT/EP2017/001013
Other languages
German (de)
English (en)
Inventor
Alexander Gaisberg-Helfenberg
Markus Reiff
Thomas Stolk
Original Assignee
Daimler Ag
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 Daimler Ag filed Critical Daimler Ag
Publication of WO2018068875A1 publication Critical patent/WO2018068875A1/fr

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
    • F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
    • F01L13/0036—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction
    • 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
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047—Camshafts
    • F01L2001/0471—Assembled camshafts
    • F01L2001/0473—Composite camshafts, e.g. with cams or cam sleeve being able to move relative to the inner camshaft or a cam adjusting rod
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
    • F01L13/0036—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction
    • F01L2013/0052—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction with cams provided on an axially slidable sleeve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F01L2013/10—Auxiliary actuators for variable valve timing
    • F01L2013/103—Electric motors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F01L2013/11—Sensors for variable valve timing
    • 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
    • F01L2301/00—Using particular materials

Definitions

  • the invention relates to a valve drive device and a method for operating a valve drive device.
  • Internal combustion engine with at least one camshaft and at least one cam member displaceably mounted on the camshaft and with at least one camshaft
  • Switching unit which is provided for the axial displacement of the at least one cam member on the camshaft known.
  • the invention is in particular the object of providing a particularly reliable valve drive device. It is by an inventive
  • the invention relates to a valve drive device in particular for a
  • Internal combustion engine with at least one camshaft and at least one cam member displaceably mounted on the camshaft and with at least one camshaft
  • Switching unit which is provided for the axial displacement of the at least one cam element on the camshaft.
  • valve drive device has at least one sensor element associated with the at least one cam element, which at least in
  • Dependence of a switching position of the corresponding switching unit outputs the sensor signal.
  • a circuit of the switching unit and thereby a position of the cam element can be determined particularly easily, as a result of which, in particular, a faulty switching of the switching unit can be prevented in an advantageous manner.
  • the switching unit is provided, in particular, to displace the at least one cam element axially on a camshaft.
  • the switching unit is intended to displace the at least one cam element axially in both directions and / or in more than two positions.
  • a "sensor element" is to be understood as meaning an element which is intended to have at least one characteristic variable and / or one physical element
  • Property record wherein the recording can be active, in particular by generating and emitting an electrical measurement signal, and / or passive, in particular by detecting changes in property of a sensor component, take place.
  • the sensor element outputs an electrical and / or electronic sensor signal that correlates in particular with the detected parameter.
  • the sensor element is designed as a sensor coil.
  • the sensor element can be made particularly simple.
  • a “sensor coil” should be understood to mean, in particular, a sensor which has at least one coil, preferably a plurality of windings, which is intended to generate a magnetic field through an energization whose interaction with the environment, in particular with a metallic object, is measurable Influence on the magnetic field, whereby by means of the coil, in particular a dependent of the interaction with the environment sensor signal can be provided.
  • the valve drive device has at least one control and / or regulating unit which is provided to process at least one sensor signal of the sensor element to determine a switching position of the cam element, which changes at least as a function of a switching position of the switching unit. This makes it particularly easy to determine a switching position.
  • a "control and / or regulating unit” is to be understood as meaning in particular a unit having at least one electronic control unit, an electronic “control unit” is to be understood as meaning in particular a unit having a processor unit and a memory unit as well as an operating program stored in the memory unit.
  • control and / or regulating unit can have a plurality of interconnected control units, which are preferably provided to communicate with one another via a bus system, in particular a CAN bus system.
  • control and / or regulating unit also have hydraulic and / or pneumatic components, in particular valves, have.
  • the term "process” is to be understood as evaluating in particular by a program stored on the control and / or regulating unit, in which the "sensor signal changes as a function of a switching position" is to be understood in particular as meaning that at least one component of a sensor signal is variable depending on the switching position of the switching unit and / or the cam member, in particular a current strength.
  • the sensor signal differ in different switching positions of the switching unit and / or the cam element in a different manner, such as by different amplitudes of a sensor signal or by different profiles of a sensor signal.
  • the sensor element has at least two end elements of different lengths, each having a different distance from the switching unit.
  • the sensor element can be formed particularly advantageous.
  • different length end elements should be understood in particular axial ends of the sensor element, which are at least one plane spaced from each other and aligned in a common direction, wherein a length of the end elements of a common plane, via which the end elements are interconnected , are different in size.
  • Fig. 1 is a schematic representation of an inventive
  • Valve train device with a switching unit and a cam element in a first switching position
  • Fig. 2 is a schematic representation of an inventive
  • FIG. 3 is a schematic representation of a valve drive device according to the invention with a switching unit and a cam element in a third switching position
  • Fig. 4 is a schematic representation of a sensor element of a
  • Valve drive device according to the invention.
  • Figures 1 to 4 show an embodiment of an inventive
  • valve drive device is part of an internal combustion engine, not shown.
  • the internal combustion engine is considered one
  • Automotive internal combustion engine is formed, which is intended to convert a chemical energy into a kinetic energy, which is used in particular for the propulsion of a motor vehicle.
  • the internal combustion engine has several cylinders, each with a plurality of valves 16, 17.
  • the internal combustion engine has two valves 16, 17 designed as intake valves and two valves designed as exhaust valves.
  • valves 16, 17 are shown schematically by their
  • the valve drive device is provided for actuating the valves 16, 17 of the internal combustion engine.
  • the valve drive device has a camshaft 10 for actuating the valves 16, 17.
  • FIG. 1 only part of the camshaft 10 assigned to a cylinder is shown.
  • the valve drive device has a further, not shown camshaft.
  • the illustrated camshaft 10 is formed by way of example as an intake camshaft and the camshaft, not shown, as an exhaust camshaft. In the following, only the part of the camshaft 10 described in FIG. 1 will be described in greater detail. The description can be transferred to the non-illustrated part of the camshaft 10 and the camshaft, not shown.
  • the camshaft 10 is rotatably mounted in a valve drive housing, not shown.
  • the camshaft 10 is rotatably supported about a rotation axis 11.
  • the rotational axis 11 of the camshaft 10 is aligned substantially parallel to a rotational axis of a crankshaft of the internal combustion engine.
  • the camshaft 10 is driven by a coupling, not shown, of the crankshaft.
  • the valve drive device comprises a cam element 12 per cylinder. In principle, it is also conceivable for the valve drive device to have a different number of cylinders per cylinder Cam elements 12 has.
  • the cam member 12 is arranged axially displaceably on the camshaft 10.
  • the cam member 12 is rotationally fixed with the
  • Camshaft 10 coupled.
  • the cam member 12 is connected in particular via a toothing, not shown, with the camshaft 10.
  • the cam member 12 is provided for actuating the valves 16, 17.
  • the cam member 12 has for each valve 16, 17 three cam tracks 13, 13 ', 14, 14', 15, 15 '.
  • the cam member 12 per valve 16, 17 only two or more than three cam tracks 13, 13 ', 14, 14', 15, 15 'has.
  • the cam tracks 13, 13 ', 14, 14', 15, 15 'each have different contours and thus actuate the respective valve 16, 17 with correspondingly different valve strokes.
  • the first cam tracks 13, 13 ' actuate the respective valve 16, 17.
  • the first switching position of the cam element 12 is shown in FIG.
  • a second switching position of the cam member 12 actuate the second
  • Cam element 12 is shown in FIG. In a third switching position of the cam member 12 actuate the third cam tracks 15, 15 ', the respective valve 16, 17.
  • the third switching position of the cam member 12 is shown in the figure 3.
  • the actuation of a valve 16, 17 by a cam track 13, 13 ', 14, 14', 15, 15 ' takes place in a manner known to those skilled in the art.
  • the valve drive device For adjusting the cam element 12 on the camshaft 10 between the three switching positions, the valve drive device has a switching unit 18.
  • Shift unit 18 is provided to displace the cam member 12 axially on the camshaft 10 to bring the different cam tracks 13, 13 ', 14, 14', 15, 15 'into engagement with the respective valve 16, 17.
  • the switching unit 18 is designed as an electronically controlled unit.
  • the switching unit 18 comprises an actuator 19 and a spindle 20 which can be driven by the actuator 19 in both directions of rotation. To translate the rotation of the spindle 20 into a linear movement, the switching unit 18 has a switching element 21.
  • the switching element 21 is as a
  • the switching element 21 has an unspecified internal thread, via which the switching element 21 is mounted on the spindle 20. By rotation of the spindle 20 by means of the electric motor 19, the switching element 21 can be moved in the axial direction of the spindle 20.
  • the cam element 12 has an actuating element 22, via which the cam element 12 is coupled to the switching unit 18.
  • the actuator 22 is formed as a rib. The formed as a rib actuator 22 is between the cam tracks 13, 14, 15 for actuating the one valve 16 and the cam tracks 13 ', 14', 15 'for actuating the another valve 17 is arranged.
  • the switching element 21 is positively connected to the
  • Actuator 22 is connected.
  • the switching element 21 has a recess in which the actuating element 22 formed as a rib is arranged.
  • the actuating element 22 is formed in another manner which appears appropriate to the person skilled in the art, for example as a groove.
  • the switching element 21 of the switching unit 18 would be formed equivalent equivalent. If the switching element 21 of the switching unit 18 axially displaced by rotation of the spindle 20, the cam member 12 by the coupling with the
  • the cam member 12 By rotating the spindle 20 in a second direction opposite to the first direction, the cam member 12 is displaced on the camshaft 10 in a second shift direction, which is opposite to the first axial direction. Thereby can be switched back and forth via the switching unit 18 between the cam tracks 13, 13 ', 14, 14', 15, 15 ', which are engaged.
  • the valve drive device For actuating the switching unit 18, the valve drive device has a control and regulating unit 23.
  • the control unit 23 is provided to the
  • the control unit 23 is designed as part of a motor control. In principle, it is also conceivable that the control and regulation unit 23 is designed as a separate control unit. By controlling the control and
  • Control unit 23 can drive the electric motor 19 of the switching unit 18 in both directions and so can the switching element 21 via the spindle 20 in both
  • the valve drive device comprises a sensor element 24 which is associated with the cam element 12.
  • the valve drive device preferably has one sensor element 24 per displaceable cam element 12.
  • the sensor element 24 is provided to output a sensor signal, by means of which a switching position of the cam element 12 can be determined.
  • the sensor element 24 is provided in particular for this purpose by means of a switching position of the switching unit 18, which is the
  • the sensor element 24 is connected to the control and
  • Control unit 23 electrically coupled.
  • the sensor signal output by the sensor element 24 is detected by the control and regulation unit 23.
  • the control unit determines a current switching position of the switching unit 18. This determines the control unit 23 at the same time the current switching position of the cam member 12.
  • the control unit 23 stores the current
  • control unit 23 passes on the current switching position of the cam member 12 to another control unit.
  • the control and regulating unit can constantly determine a current switching position of the switching unit 18 and the camshaft element during operation.
  • an operation should in particular be understood as a state in which the control and regulation unit 23 and thus also the sensor element 24 are supplied with a current.
  • an operation is to be understood as a state in which the ignition is switched on.
  • a switching position of the switching units 18 and the corresponding cam elements 12 of the valve drive device can be determined unambiguously by the control and regulation unit 23 even before a start of the internal combustion engine.
  • the sensor element 24 is fixed to the housing in the
  • Valve train device attached. Due to the housing-fixed arrangement of
  • Sensor element 24 thermal changes in length of the switching unit 18, which may occur during operation of the internal combustion engine can be corrected automatically.
  • the sensor element 24 outputs a corresponding sensor signal 31, 32, 33 as a function of the switching position of the switching unit 18. Depending on the switching position of the switching unit 18, the sensor signal 31, 32, 33 which is output by the sensor element 24 is different.
  • the sensor signal 31, 32, 33 which outputs the sensor element 24 is formed as an electrical signal. That of the sensor element 24
  • FIGS. 1 to 3 show in each case a diagram 30, 30 ', 30 "which shows a sensor signal 31, 32, 33 corresponding to the respective switching position of the switching unit 18 shown in the FIGURE.
  • the sensor element 24 is as a
  • the trained as a sensor coil sensor element 24 is here in particular designed to form a magnetic circuit 34 at least with a part of the switching unit 18 for determining a switching position of the switching unit 18.
  • the sensor element 24 is provided in particular for outputting different sensor signals 31, 32, 33 through a change in the magnetic circuit 34 produced.
  • the sensor element 24 has a carrier element 28.
  • the support member 28 is formed of a magnetically conductive material.
  • the carrier element is designed as a yoke plate.
  • the carrier element 28 has at its opposite axial ends in each case three spaced-apart end elements 25, 26, 27, 25 ', 26', 27 '.
  • the carrier element 28 at the axial ends in each case a different number of end elements 25, 26, 27, 25 ', 26', 27 ', which in particular corresponds to a number of different switching positions, by means of the switching unit 18th and / or the cam member 12 can be displayed.
  • the end elements
  • 25, 26, 27, 25 ', 26', 27 'of the support member 28 are each at 90 degrees to one
  • the sensor element 24 has a coil 29 which is wound with its windings around the middle part of the carrier element 28.
  • the coil is intended to generate a magnetic flux in the carrier element 28.
  • the coil 29 of the sensor element 24 is thereby of the control and
  • the coil 29 of the sensor element 24 is provided with a
  • Carrier element 28 facing the switching unit 18.
  • the end elements 25, 26, 27, 25 ', 26', 27 ' which are arranged on one side of the carrier element 28 each have different lengths.
  • the sensor coil 24 is in particular provided with the switching element 21 of the switching unit 18 to form a magnetic circuit 34.
  • two corresponding end elements 25, 26, 27, 25 ', 26', 27 ' are provided in a switching position of the switching unit 18 to form a magnetic circuit 34 with the switching element 21 of the switching unit 18.
  • the sensor element is arranged so that in each case in a switching position of the switching unit 18 only one pair of corresponding end elements 25,
  • Sensor element 24 and the switching element 21 of the switching unit lead to a circuit-dependent magnetic resistance in the magnetic circuit 34, whereby a height of the current flowing in the coil 29 can be clearly assigned to a switching position of the switching unit.
  • the end elements 25, 25 ' are provided to form a magnetic circuit 34 with the switching element 21 (see FIG. 1).
  • the end elements 25, 25 'of the support member 28 are formed longer than the end members 26, 26' and the end members 27, 27 '. This is in the first
  • the switching element 21 of the switching unit 18 is displaced on the spindle 20 accordingly.
  • the switching element 21 thus changes its axial position to the
  • Sensor element 21 and is in the second switching position below the end members 26, 26 'arranged (see Figure 2).
  • the sensor element 24 forms a magnetic circuit 34 with the switching element 21 via the end elements 26, 26 '.
  • Switching element 21 and the end elements 26, 26 ' is greater than the gap between the switching element 21 and the end elements 25, 25' in the first switching position of the switching unit 18.
  • a magnetic resistance of the magnetic circuit 34 in the second switching position is greater than in the first Switching position of the switching unit 18, whereby in the coil 29, a current 32 flows, which can be clearly assigned to the second switching position of the switching unit.
  • the switching element 21 of the switching unit 18 is displaced on the spindle 20 accordingly.
  • the switching element 21 thus changes its axial position to the
  • the sensor element 24 forms a magnetic circuit 34 with the switching element 21 via the end elements 27, 27 '.
  • Switching element 21 and the end elements 27, 27 ' is greater than the gap between the switching element 21 and the end elements 26, 26' in the second switching position of the switching unit 18.
  • a magnetic resistance of the magnetic circuit 34 in the third switching position is greater than in the second Switching position of the switching unit 18, whereby in the coil 29, a current flows 33, which can be clearly assigned to the third switching position of the switching unit.
  • the principle of the sensor unit 24 is also applicable to more than three switching positions of the switching unit 18. This would require a number of different lengths
  • End elements 25, 26, 27, 25 ', 26', 27 'of the sensor element 24 are adapted to a corresponding number of switching positions of the switching unit. Due to the configuration of the sensor unit 24, by means of the control and regulation unit 23, at any time when the sensor unit 24 and the control unit are energized, a
  • Switching position of the switching unit 18 and thereby a switching position of the cam member 12 are determined, in particular before a start of the internal combustion engine.
  • Ventiltechnischvorraum be ensured that the current switching positions of the switching unit 18 and the cam member 12 are always stored correctly on the control unit. This can advantageously be prevented that a stored on the control and regulation unit 23 switching position of the switching unit 18 differs from the actual switching position of the switching unit 18.
  • the senor element 24 is formed in another way that appears appropriate to a person skilled in the art, one of a
  • Switching position of the switching unit 18 or from the switching unit of the camshaft member 12 outputs directly dependent sensor signal. It is conceivable that the

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

Abstract

L'invention concerne un système de distribution, en particulier pour un moteur à combustion interne, comprenant au moins un arbre à cames (10) et au moins un élément came (12) monté mobile sur l'arbre à cames (10) ainsi qu'au moins une unité de commutation (18) qui est conçue pour permettre le déplacement axial dudit au moins un élément came (12) sur l'arbre à cames (10). Selon l'invention, ledit système de distribution comprend au moins un élément de détection (24) associé audit au moins un élément came (12), lequel élément de détection délivre le signal de détection au moins en fonction d'une position de commutation de l'unité de commutation (18) correspondante.
PCT/EP2017/001013 2016-10-12 2017-08-25 Système de distribution WO2018068875A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016012197.1A DE102016012197A1 (de) 2016-10-12 2016-10-12 Ventiltriebvorrichtung
DE102016012197.1 2016-10-12

Publications (1)

Publication Number Publication Date
WO2018068875A1 true WO2018068875A1 (fr) 2018-04-19

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2017/001013 WO2018068875A1 (fr) 2016-10-12 2017-08-25 Système de distribution

Country Status (2)

Country Link
DE (1) DE102016012197A1 (fr)
WO (1) WO2018068875A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109209546A (zh) * 2018-09-30 2019-01-15 东风汽车集团有限公司 连续可变气门升程机构的间隙调节装置及调节方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114233435A (zh) * 2020-09-09 2022-03-25 舍弗勒技术股份两合公司 具有调节单元的配气机构控制设备

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19611641C1 (de) 1996-03-25 1997-06-05 Porsche Ag Ventiltrieb einer Brennkraftmaschine
DE102007054979A1 (de) * 2007-11-17 2009-05-20 Daimler Ag Ventiltriebvorrichtung
JP2009197768A (ja) * 2008-02-25 2009-09-03 Toyota Motor Corp 可変作用角機構の異常判定装置
DE102011056833A1 (de) * 2011-12-21 2013-06-27 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Ventiltriebvorrichtung für eine Brennkraftmaschine
DE102014205763A1 (de) * 2013-04-05 2014-10-09 Ford Global Technologies, Llc Positionsdetektion für Nockenschalt-Nockenwellensystem

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19611641C1 (de) 1996-03-25 1997-06-05 Porsche Ag Ventiltrieb einer Brennkraftmaschine
DE102007054979A1 (de) * 2007-11-17 2009-05-20 Daimler Ag Ventiltriebvorrichtung
JP2009197768A (ja) * 2008-02-25 2009-09-03 Toyota Motor Corp 可変作用角機構の異常判定装置
DE102011056833A1 (de) * 2011-12-21 2013-06-27 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Ventiltriebvorrichtung für eine Brennkraftmaschine
DE102014205763A1 (de) * 2013-04-05 2014-10-09 Ford Global Technologies, Llc Positionsdetektion für Nockenschalt-Nockenwellensystem

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109209546A (zh) * 2018-09-30 2019-01-15 东风汽车集团有限公司 连续可变气门升程机构的间隙调节装置及调节方法

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