CN114233430A - Valve train control device with a control unit - Google Patents
Valve train control device with a control unit Download PDFInfo
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- CN114233430A CN114233430A CN202010941253.4A CN202010941253A CN114233430A CN 114233430 A CN114233430 A CN 114233430A CN 202010941253 A CN202010941253 A CN 202010941253A CN 114233430 A CN114233430 A CN 114233430A
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- lift
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- 230000005540 biological transmission Effects 0.000 claims abstract description 79
- 238000002485 combustion reaction Methods 0.000 claims abstract description 11
- 238000005259 measurement Methods 0.000 claims description 24
- 238000001514 detection method Methods 0.000 claims description 22
- 230000007704 transition Effects 0.000 claims description 12
- 238000006073 displacement reaction Methods 0.000 claims 1
- 238000002360 preparation method Methods 0.000 claims 1
- 230000008878 coupling Effects 0.000 description 10
- 238000010168 coupling process Methods 0.000 description 10
- 238000005859 coupling reaction Methods 0.000 description 10
- 230000007246 mechanism Effects 0.000 description 6
- 230000006870 function Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 3
- 230000001419 dependent effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000032683 aging Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000002604 ultrasonography Methods 0.000 description 2
- 230000009849 deactivation Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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Classifications
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- 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
- F01L1/12—Transmitting gear between valve drive and valve
- F01L1/18—Rocking arms or levers
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- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve Device For Special Equipments (AREA)
Abstract
The invention relates to a valve control device for controlling a variable valve train associated with an internal combustion engine, which presets the valve lift of a valve of the internal combustion engine and has a switchable lift transmission element with a lift switching device, which implements the valve lift control, which has a switching device for controlling the lift transmission element, which has an actuator, an actuating element and a switching transmission element, which implement at least one first actuating position and one second actuating position, and which can assume switching positions preset by the actuating position and the switching transmission position, which valve control device has a sensor device, which has a sensor element for detecting the switching positions and for outputting sensor signals associated therewith, which actuator is operated via an adjusting unit for changing the actuating position, which adjusting unit is designed to receive the sensor signals as input variables, the sensor element is configured to incrementally detect the switching position by setting the actuating position as an output variable as a function of the sensor signal by means of the control.
Description
Technical Field
The invention relates to a valve gear control device for controlling a variable valve gear associated with an internal combustion engine, which valve gear presets a valve lift of at least one valve of the internal combustion engine by means of a cam and which valve gear has a switchable lift transmission element which acts between the cam and the at least one valve, which lift transmission element comprises a lift switching device which enables valve lift control by switching between at least a first switching state in which a first maximum valve lift of the valve is set and a second switching state in which a second maximum valve lift of the valve is set, wherein the valve gear control device has a switching device and a sensor device which are designed to control the lift transmission element, wherein the switching device has an actuator with an actuating element for realizing at least a first and a second actuating position, and has a switching transmission element which is coupled to the lift switching device and can assume at least a first or a second switching transmission position associated with the actuating position in order to switch a switching state of the lift transmission element, wherein the switching device can assume a switching position predetermined by the actuating position and the switching transmission position, and the sensor device has at least one sensor element for detecting the switching position and for outputting a sensor signal associated with the switching position.
Background
A valve train control device is known, for example, from DE 102017101792 a 1. The valve train control apparatus is assigned to a variable valve train of an internal combustion engine. The internal combustion engine has gas exchange valves, the valve lifts of which are preset by a primary cam and a secondary cam of a camshaft, respectively, and which can be selectively transferred to the associated gas exchange valves via a switchable rocker arm having a primary lever and a secondary lever. The primary lever can be coupled to a secondary lever via an axially displaceable coupling bolt, which can be adjusted by an adjusting device, and the secondary lever is pivotably supported on the primary lever. The coupling bolt can be displaced against the restoring force of the spring element by means of an axially displaceably mounted switching bolt. The axial outer end part of the switching bolt is connected with an adjusting plate, and the adjusting plate is coupled with the push rod. The push rod is arranged above the rocker arm parallel to the associated camshaft and can be moved along the longitudinal axis from an initial position into a switching position against the restoring force of a restoring spring via a linear actuator.
For example, DE 102018120424.8 describes a valve train control device having a sensor element. A variable valve gear having a regulating device and a regulating path sensor is described. The adjusting device comprises a push rod and an adjusting plate. The rocker arm is controlled by the switching position of the push rod. The rocker arm has a switching bolt which is actuated by an adjusting plate depending on the switching position and thus selectively switches off or switches the valve lift. The adjustment path sensor enables detection of a change in position of the adjustment plate or the push rod. The sensor measured values output by the control path sensor are used to determine the switching position of the control plate or the tappet, in order to be able to determine the switching state of the switchable rocker and the correct function of the rocker control.
Disclosure of Invention
The object of the invention is to improve a valve train control device. It should be possible to set the switching timing of the valve train control apparatus more accurately. Furthermore, valve lift control should be able to be performed independently of external influences and aging influences.
At least one of the objects is achieved by the valve train control device according to the invention in that the actuator for changing the actuating position is actuated via an actuating unit which is designed to receive the sensor signal as an input variable and to preset the actuating position as an output variable as a function of the sensor signal via an adjustment, wherein the sensor element is designed to incrementally detect the switching position. Thereby, the switching performance of the valve gear control apparatus can be improved. The switching time can be set with accuracy and more quickly. Valve lift control can be performed less independent of external influences, such as temperature fluctuations, voltage fluctuations or spring force variations. The valve lift control can be reliably set via the adjustment. Thereby, external influences and aging influences acting on the valve lift control can be compensated. Furthermore, calibration of the sensor element can be dispensed with, in particular before the sensor element is put into operation.
The valve gear control apparatus can be incorporated in a vehicle. The vehicle can be an automobile.
The sensor device can have at least two sensor elements. One sensor element can be associated with the switching transmission element and one sensor element can be associated with the actuating element. Both sensor elements can also be associated with a switching transmission element or an actuating element.
The sensor signal can be used to identify disturbances. From the sensor signals, functional disturbances of the switching device can be deduced.
The actuator can be electrically operated. The manipulated position can be related to a voltage applied to the actuator. The adjustment unit can form a relationship between a sensor signal value of the sensor signal and a voltage value of the voltage and store the relationship in an associated memory. When the actuator is actuated, the voltage can be set according to the stored relationship and the desired switching position. Self-learning and self-optimizing valve lift control is thereby enabled.
The first operating position enables a first switching transmission position and the second operating position enables a second switching transmission position. In the case of the first operating position and, correspondingly, in the case of the first switching transmission position, there can be a first switching position, and in the case of the second operating position and, correspondingly, in the case of the second switching transmission position, there can be a second switching position.
In a preferred embodiment of the invention, the lift transmission element is a switchable rocker arm, and/or the switch transmission element is an axially movable push rod, and/or the first switch position or the second switch position is a position along the longitudinal axis. The switchable rocker arm can be a switchable roller rocker arm. The lift switching device can include a switching pin. The shift transmission element can be coupled to the shift pin via a coupling element. The switching pin can be moved against the restoring force of the restoring spring. The switch pin is movable along an axis extending parallel to the longitudinal axis. The switching pin can be connected to a locking pin via which the primary lever and the secondary lever of the switchable roller rocker can be coupled to or decoupled from one another.
In a particular embodiment of the invention, the switching between the respective switching positions is effected by shifting the transmission element and/or the actuating element along the longitudinal axis.
In a further particular embodiment of the invention, the sensor signal is formed by at least one first sensor signal value or second sensor signal value, and the sensor element is designed to determine the switching position via a sequence of the first sensor signal value and the second sensor signal value. Thereby enabling binary detection of the switching position.
In a preferred embodiment of the invention, the first sensor signal value corresponds to a minimum measurement interval between the sensor element and the switching device, and the second sensor signal value corresponds to a maximum measurement interval between the sensor element and the switching device.
In an advantageous embodiment of the invention, the sensor element is designed to detect the switching position by a sequence of transitions between a minimum measurement interval and a maximum measurement interval.
In a preferred embodiment of the invention, the switching device has a detection mechanism and the sensor element is associated with the detection mechanism, wherein the detection mechanism has a comb-like structure with a plurality of transitions between elevations and depressions. The detection means can be formed in one piece from the switching transmission element and/or the actuating element. The detection means can be firmly connected as a separate component to the switch transmission element and/or the actuating element.
The transitions between the elevations and depressions can be present at equal distances or at different intervals. The width of the ridges and/or the width of the depressions can be the same or different. The width can relate to a dimension parallel to the longitudinal axis. The height of the elevations and/or the depth of the depressions can be the same and/or different.
The transition can be configured as a recess into the switching transmission element. Here, the raised portion can be formed by switching the region of the transmission element adjacent to the recessed portion. This enables a space-saving arrangement.
In a particular embodiment of the invention, the elevations preset a minimum measurement interval and the depressions preset a maximum measurement interval.
In an advantageous embodiment of the invention, the sensor element enables a contactless detection of the switching position, in particular of the switching transmission position and/or the actuating position. The contactless detection can be performed electromagnetically, in particular capacitively, inductively or according to the hall principle and/or optically and/or acoustically, in particular via ultrasound.
In a particular embodiment of the invention, detecting the switching position comprises identifying an absolute switching position and/or identifying a switching position gradient that characterizes the switching position as a function of time. If the elevations differ in height and/or the depressions differ in depth, the sensor element can detect the absolute switching position by means of different maximum or minimum measuring intervals. The switching position gradient can be detected via the time-sequential speed of the transition.
Further advantages and advantageous embodiments of the invention emerge from the description of the figures and the figures.
Drawings
The present invention is described in detail below with reference to the accompanying drawings. Showing in detail:
fig. 1 shows a plan view of a valve train control device in a special embodiment of the invention.
Fig. 2 shows a plan view of the valve train control device in a first operating state in a further special embodiment of the invention.
Fig. 3 shows sensor signals of the valve train control device of fig. 2.
Fig. 4 shows a plan view of the valve train control device of fig. 2 in a second operating state.
Fig. 5 shows sensor signals of the valve train control device of fig. 4.
Fig. 6 shows a detail of a valve train control device in a further special embodiment of the invention.
Detailed description of the preferred embodiments
Fig. 1 shows a plan view of a valve train control device 10 in a special embodiment of the invention. The valve train control device 10 is provided for controlling a variable valve train 12 assigned to an internal combustion engine. The valve train 12 comprises a camshaft, not shown here, which is rotatable about an axis of rotation and has a plurality of cams by means of which the valve lift of the valves of the internal combustion engine is preset.
The respective valve is preferably a gas exchange valve, in particular an intake valve or an exhaust valve. The valve train 12 comprises in each case a switchable lift transmission element 14, which can be designed as a switchable roller rocker, arranged between the cam and the respective valve. The respective switchable lift transmission element 14 effects a movement which is dependent on the cam position of the respective cam in order to actuate the respectively associated valve.
Each lift transmission element 14 has a lift switching device 16 which enables valve lift control by switching between at least a first switching state in which a first maximum valve lift of the respective valve can be set and a second switching state in which a second maximum valve lift of the respective valve can be set. The first valve lift is preferably greater than the second valve lift. The first valve lift can be a full lift and the second valve lift can be a zero lift. This enables selective cylinder deactivation of the internal combustion engine. The first valve lift can also be a full lift, while the second valve lift can be a back lift that follows the full lift in time and is less in value than the full lift. This enables internal exhaust gas recirculation or pressure reduction in the working lift of the piston.
The valve train control device 10 has a switching device 18 for controlling the lift transmission element 14. The switching device 18 comprises an actuator 20, in particular a linear actuator, which in turn has an actuating element 22 that is movable along a longitudinal axis a1 for achieving at least one first and one second actuating position. Furthermore, the switching device 18 comprises a switching transmission element 24 which is designed as a plunger which is movable along the longitudinal axis a1 and can assume at least a first switching transmission position or a second switching transmission position in relation to the actuating position in order to switch the switching state of the lift transmission element 14. In this case, the switching transmission elements 24 are each connected to the lift switching device 16 via a coupling element 26, in particular a spring-elastic actuating plate. The coupling element 26 transmits the first or second switching transmission position to the respective lift switching device 16 of the respective lift transmission element 14.
The lift switching device 16 comprises a switching pin 28 which can be transferred from the extended position into the extended position against the spring force of a return spring 30. The moved-out position corresponds to a first switching state of the lift transmission element 14 and the moved-in position corresponds to a second switching state of the lift transmission element 14. The switching pin 28 is movable along an axis a2 running parallel to the longitudinal axis a1 and is connected to a locking pin, not shown here, via which the primary lever 32 can be coupled to or decoupled from the secondary lever 34 of the lift transmission element 14, whereby a first valve lift or a second valve lift can be set.
The first actuating position of the actuating element 22 effects a first switching transmission position of the switching transmission element 24. The first switching transmission position sets a first switching state on the respective lift transmission element 14 via the coupling element 26. The second manipulated position effects a second switch transmission position. The second shift transmission positions each set a second shift state on the lift transmission elements 14 via the coupling element 26. The switching device 18 is able to occupy a switching position preset by the manoeuvring position and the switching transmission position. If the first operating position and thus also the first switching transmission position is present, the first switching position is given. If a second operating position is present and therefore also a second switching transmission position is present, a second switching position is provided. The switching state of the respective lift transmission element 14 is achieved if the respective valve is released, i.e. not actuated by the cam, preferably when the preset switching transmission position of the transmission element 24 is switched.
The valve train control device 10 further comprises a sensor arrangement 35 with at least one sensor element 36 for incrementally detecting the switching position of the switching device 18 and for outputting a sensor signal which is dependent on the switching position. Incremental detection is possible, so that the switching position can be determined via an alternating sequence of sensor signal values of the sensor signal. The sensor signal values generated by the sensor elements 36 can preferably be formed by the first sensor signal values and the second sensor signal values, and are in particular restricted thereto. Thereby enabling binary detection of the switching position.
The sensor element 36 is associated with the switching transmission element 24. The switch transmission element 24 has a detection mechanism 38, which can be formed in one piece from the switch transmission element 24 or can be firmly connected to the switch transmission element 24 as a separate component. The detection means 38 have a comb structure 40 with a plurality of equidistantly arranged transitions 41 between elevations 42 and depressions 43, by means of which transitions, when changing the switching position, a sequence of measurement intervals between the sensor element 36 and the detection means 38 is detected by the sensor element 36, which measurement intervals alternate between a minimum measurement interval H1 formed by the elevations 42 and a maximum measurement interval H2 formed by the depressions 43.
The sensor element 36 enables a contactless detection of the switching position of the switching transmission element 24. The contactless detection can be performed electromagnetically, in particular capacitively, inductively or according to the hall principle and/or optically and/or acoustically, in particular via ultrasound. Detecting the switching position of the switching transmission element 24 can include identifying an absolute switching position and/or identifying a switching position gradient that characterizes a change over time of the switching position of the switching transmission element 24. The absolute switch position may be detected by the sensor element 36 from a different minimum measured distance H1 for each bump 42 by modifying the minimum measured distance H1 for the same bump 42 as shown here. By means of the different minimum measuring distances H1 of the elevations 42, different measuring distances between the sensor element 36 and the detection means 38 are possible at each elevation 42, as a result of which the absolute switching position can be detected. The switching position gradient can be detected via the time-series speed of the transition portion 41.
The actuator 20 is actuated via an actuating unit 44 in order to change the actuating position of the actuating element 22, which is designed to receive sensor signals as input variables and to set the actuating position as an output variable for the actuator 20 via an adjustment as a function of the sensor signals. Thereby, the switching performance of the valve train control apparatus 10 can be improved. The switching time can be set with accuracy and more quickly, and valve lift control can be performed independently of external influences, such as temperature fluctuations, voltage fluctuations, or spring force changes.
The actuator 20 is electrically operable. The actuating position of actuating element 22 is dependent on the voltage applied to actuator 20. The adjusting unit 44 is able to form a relation between the sensor signal and the voltage value of the voltage and store the relation in an associated memory 46. When the actuator 20 is actuated, the voltage for actuator actuation is set according to the stored relationship and the desired switch position 48. Self-learning and self-optimizing valve lift control is thereby enabled. The sensor signal can also be used to detect disturbances. From the sensor signal, functional disturbances of the switching device 18 can be inferred.
Fig. 2 shows a plan view of the valve train control device 10 in a first operating state in a further special embodiment of the invention. The switching device 18 is in a first switching position S1, in which the actuating element 22 occupies a first actuating position and the switch transmission element 24 occupies a first switch transmission position. In this case, the coupling element 26 is not stressed with respect to the shift pin 28, which is in the extended position by the restoring spring 30. In the first switching position S1, the sensor element 36 detects a maximum measurement interval H2.
Fig. 3 shows the sensor signal M of the valve train control device of fig. 2. Here, the sensor signal M detected by the sensor element at the time t (S1) of the first switching position is a second sensor signal value M2, which corresponds to the maximum measurement interval H2. If the second switching position S2 is occupied, the sensor element also detects a second sensor signal value M2 again at the time t (S2) of the second switching position S2, which second sensor signal value corresponds to the maximum measurement interval H2. However, the second switching position S2 can be identified by a sequence of sensor signal values of the sensor signal M between two times t (S1) and t (S2), which sensor signal values alternate between a first sensor signal value M1 and a second sensor signal value M2 corresponding to the minimum measurement interval H1.
Fig. 4 shows a plan view of the valve train control device 10 in a second operating state in a further special embodiment of the invention. The switching device 18 is in a second switching position S2, which is offset along the longitudinal axis a1 with respect to the first switching position S1 and in which the actuating element 22 assumes the second actuating position and the switching transmission element 24 assumes the second switching transmission position. The coupling element 26 loads the shift pin 28, which is in the retracted position and thus loads the return spring 30. The switching pin 28 acts on a corresponding locking pin, not visible here, via which the primary lever 32 and the secondary lever 34 of the lift transmission element 14 are coupled to one another.
Fig. 5 shows the sensor signal M of the valve train control device of fig. 4. In the second switching position S2, the sensor element also detects again a second sensor signal value M2 at the time t (S2) of the second switching position S2, which second sensor signal value corresponds to the maximum measurement interval H2. However, the second switching position S2 is identified by a sequence of sensor signal values of the sensor signal M between two instants t (S1) and t (S2), which sensor signal values alternate between the first sensor signal value M1 and the second sensor signal value M2.
Fig. 6 shows a detail of a valve train control device 10 in a further special embodiment of the invention. The transition 41 is designed as a recess into the switching transmission element 24. Here, the raised portion is formed by switching the region of the transmission element 24 adjacent to the recessed portion. This enables a space-saving arrangement.
List of reference numerals
10 valve train control device
12 air distribution mechanism
14 Lift Transmission element
16-lift switching apparatus
18 switching device
20 actuator
22 operating element
24 switching transmission element
26 coupling element
28 switching pin
30 return spring
32 primary lever
34 Secondary lever
35 sensor device
36 sensor element
38 detection mechanism
40 measurement interval
41 transition part
42 raised portion
43 concave part
44 adjusting unit
46 memory
48 desired switching position
Longitudinal axis of A1
Axis A2
H1 minimum measurement interval
H2 maximum measurement interval
M sensor signal
M1 first sensor signal value
M2 second sensor signal value
S1 first switching position
S2 second switching position
Claims (10)
1. A valve gear control device (10) for controlling a variable valve gear (12) associated with an internal combustion engine, which valve gear presets a valve lift of at least one valve of the internal combustion engine by means of a cam and which valve gear has a switchable lift transmission element (14) which acts between the cam and the at least one valve, which lift transmission element comprises a lift switching device (16) which enables valve lift control by switching between at least one first switching state, in which a first maximum valve lift of the valve is set, and a second switching state, in which a second maximum valve lift of the valve is set, wherein the valve gear control device (10) has a switching device (18) which is designed to control the lift transmission element (14) and a sensor device (35), wherein the switching device (18) has an actuator (20) having an actuating element (22) for realizing at least one first and second actuating position and a switching transmission element (24) which is coupled to the lift switching device (16) and can assume at least a first or second switching transmission position associated with the actuating position in order to switch a switching state of the lift transmission element (14), wherein the switching device (18) can assume a switching position (S1, S2) predetermined by the actuating position and the switching transmission position, and the sensor device (35) has at least one sensor element (36) for detecting the switching position (S1, S2) and outputting a sensor signal (M) associated with the switching position (S1, S2),
it is characterized in that the preparation method is characterized in that,
actuating the actuator (20) for changing the actuating position via an actuating unit (44) which is designed to receive the sensor signal (M) as an input variable and to preset the actuating position as an output variable as a function of the sensor signal (M) via an adjustment, wherein the sensor element (36) is designed to incrementally detect the switching position (S1, S2).
2. Valve train control arrangement (10) according to claim 1, characterized in that the lift transmission element (14) is a switchable rocker arm, and/or the switch transmission element (24) is an axially movable push rod, and/or the first or second switching position (S1, S2) is a position along the longitudinal axis (a 1).
3. Valve train control device (10) according to claim 1 or 2, characterized in that the changeover between the respective switching positions (S1, S2) is effected by a displacement of the switching transmission element (24) and/or the operating element (22) along the longitudinal axis (A1).
4. Valve train control device (10) according to one of the preceding claims, characterised in that the sensor signal (M) is formed by at least one first sensor signal value (M1) or second sensor signal value (M2) and the sensor element (36) is set up to determine the switching position (S1, S2) via a sequence of the first sensor signal value (M1) and second sensor signal value (M2).
5. Valve train control device (10) according to claim 4, characterized in that the first sensor signal value (M1) corresponds to a minimum measurement interval (H1) between the sensor element (36) and the switching device (18) and the second sensor signal value (M2) corresponds to a maximum measurement interval (H2) between the sensor element (36) and the switching device (18).
6. Valve train control arrangement (10) according to claim 5, characterised in that the sensor element (36) is set up for detecting the switching position (S1, S2) by a sequence of transitions (41) between the minimum measurement interval (H1) and the maximum measurement interval (H2).
7. Valve train control device (10) according to one of the preceding claims, characterized in that the switching device (18) has a detection means (38) and the sensor element (36) is associated with the detection means (38), wherein the detection means (38) has a comb-like structure (40) with a number of transitions (41) between elevations (42) and depressions (43).
8. Valve train control device (10) according to claim 7, characterized in that the bump (42) presets the minimum measurement interval (H1) and the recess (43) presets the maximum measurement interval (H2).
9. Valve train control arrangement (10) according to one of the preceding claims, characterized in that the sensor element (36) enables a contactless detection of the switching position (S1, S2).
10. Valve train control arrangement (10) according to any of the preceding claims, characterized in that detecting the switching position (S1, S2) comprises identifying an absolute switching position (S1, S2) and/or identifying a switching position gradient characterizing the switching position (S1, S2) as a function of time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010941253.4A CN114233430A (en) | 2020-09-09 | 2020-09-09 | Valve train control device with a control unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010941253.4A CN114233430A (en) | 2020-09-09 | 2020-09-09 | Valve train control device with a control unit |
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| Publication Number | Publication Date |
|---|---|
| CN114233430A true CN114233430A (en) | 2022-03-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010941253.4A Pending CN114233430A (en) | 2020-09-09 | 2020-09-09 | Valve train control device with a control unit |
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| CN (1) | CN114233430A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001082191A (en) * | 1999-09-20 | 2001-03-27 | Unisia Jecs Corp | Control position detecting device for variable valve system of internal combustion engine |
| US20030041823A1 (en) * | 2001-08-29 | 2003-03-06 | Nissan Motor Co., Ltd. | Variable valve operating system of internal combustion engine enabling variation of valve-lift characteristic and phase |
| JP2007051602A (en) * | 2005-08-19 | 2007-03-01 | Toyota Motor Corp | Variable valve gear for internal combustion engine |
| CN104948247A (en) * | 2014-02-19 | 2015-09-30 | 舍弗勒技术股份两合公司 | Variable stroke valve train for internal combustion engine |
| CN204804892U (en) * | 2013-03-01 | 2015-11-25 | 伊顿公司 | Switch switching rocking arm subassembly of rocking arm subassembly, latch assembly that is used for switching rocking arm subassembly, manufacture equipment and economy |
| CN109139168A (en) * | 2017-06-19 | 2019-01-04 | 舍弗勒技术股份两合公司 | Valve train having an adjustable rocker arm |
-
2020
- 2020-09-09 CN CN202010941253.4A patent/CN114233430A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001082191A (en) * | 1999-09-20 | 2001-03-27 | Unisia Jecs Corp | Control position detecting device for variable valve system of internal combustion engine |
| US20030041823A1 (en) * | 2001-08-29 | 2003-03-06 | Nissan Motor Co., Ltd. | Variable valve operating system of internal combustion engine enabling variation of valve-lift characteristic and phase |
| JP2007051602A (en) * | 2005-08-19 | 2007-03-01 | Toyota Motor Corp | Variable valve gear for internal combustion engine |
| CN204804892U (en) * | 2013-03-01 | 2015-11-25 | 伊顿公司 | Switch switching rocking arm subassembly of rocking arm subassembly, latch assembly that is used for switching rocking arm subassembly, manufacture equipment and economy |
| CN104948247A (en) * | 2014-02-19 | 2015-09-30 | 舍弗勒技术股份两合公司 | Variable stroke valve train for internal combustion engine |
| CN109139168A (en) * | 2017-06-19 | 2019-01-04 | 舍弗勒技术股份两合公司 | Valve train having an adjustable rocker arm |
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