EP3173594B1 - Variable valve lift actuator of engine - Google Patents

Variable valve lift actuator of engine Download PDF

Info

Publication number
EP3173594B1
EP3173594B1 EP16163100.7A EP16163100A EP3173594B1 EP 3173594 B1 EP3173594 B1 EP 3173594B1 EP 16163100 A EP16163100 A EP 16163100A EP 3173594 B1 EP3173594 B1 EP 3173594B1
Authority
EP
European Patent Office
Prior art keywords
variable valve
engine
valve
lift actuator
latching pin
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP16163100.7A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3173594A1 (en
Inventor
Lee Sang Ryul
Hwang Soo Hyun
Park Jong Wung
Park Chan Wung
Kim Do Joong
Lee Dong Hyeong
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Motonic Corp
Original Assignee
Motonic Corp
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
Priority claimed from KR1020150168362A external-priority patent/KR101716315B1/ko
Priority claimed from KR1020160008088A external-priority patent/KR101736806B1/ko
Application filed by Motonic Corp filed Critical Motonic Corp
Publication of EP3173594A1 publication Critical patent/EP3173594A1/en
Application granted granted Critical
Publication of EP3173594B1 publication Critical patent/EP3173594B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • 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
    • F01L1/26—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of two or more valves operated simultaneously by same transmitting-gear; peculiar to machines or engines with more than two lift-valves per cylinder
    • F01L1/267—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of two or more valves operated simultaneously by same transmitting-gear; peculiar to machines or engines with more than two lift-valves per cylinder with means for varying the timing or the lift of the valves
    • 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
    • F01L13/0005—Deactivating valves
    • 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
    • F01L13/0005—Deactivating valves
    • F01L2013/001—Deactivating cylinders

Definitions

  • the present invention relates to a variable valve lift actuator of an engine, and more particularly to a variable valve lift actuator of an engine, capable of controlling a lift amount of a valve according to driving conditions of a vehicle.
  • a valve mechanism applied to a vehicle engine supplies fuel-air mixture to a combustion chamber and discharges combustion gas according to strokes of the vehicle engine.
  • variable valve mechanisms have been developed to optimize an inflow of the fuel-air mixture and a discharge efficiency of the combustion gas by varying an opening rate or an opening phase of a valve depending on operating areas of an engine which are divided according to operating conditions of the engine, that is, the rotation speed and the load of the engine, and applied to the engine.
  • variable valve mechanisms for the vehicle engine can enhance the performance of the engine, such as the fuel efficiency, the torque, or the power of the engine, and reduce an amount of discharged gas.
  • the variable valve mechanism for the vehicle engine includes a variable valve timing unit to change an opening/closing time of a valve, a variable valve lift unit to change an open degree of the valve, and a variable valve actuation angle unit to change an actuation angle of the valve.
  • variable valve lift unit is used to enhance the power and the fuel efficiency of the vehicle at middle and low-speed modes, and classified into rock arm, pivot, tappet, and bucket-type variable valve lift units.
  • Applicant of the present invention has multiple disclosures including patent documents (Korean Patent Registration Nos. 10-1084739 and 10-1084741 (issued on Nov. 22, 2011 ) and Korean Unexamined Patent Publication No. 10-2012-0088363 (filed on Aug. 8, 2012 ) related to the variable valve lift unit.
  • variable valve lift mechanism of the related art the displacement of an intake valve is always constant regardless of the load of the vehicle, so that an engine speed has a limitation in representing the optimal efficiency.
  • variable valve lift unit since hydraulic pressure is used to deactivate a valve, the structure of the variable valve lift unit becomes complicated, so that the workability may be degraded.
  • variable valve lift unit erroneously operates so that the precision may be degraded when controlling the lift amount of the valve.
  • variable valve lift technology of an engine capable of improving the efficiency of the engine by performing a deactivation control operation and a variable two-stage control operation of high and low speed modes in which some cylinders are deactivated at a low-speed and low-load state of the engine and whole cylinders are activated at high-speed and high-load state
  • patent documents 4 and 5 Korean Patent Publication No. 10-2012-0088363 (published on Aug. 08, 2012 ) and Korean Patent Registration No. 10-1465635 (issued on Nov. 27, 2014 ).
  • variable valve lift unit may be not applied to an engine of an actual vehicle.
  • variable valve lift actuator comprising the features of the preamble of claim 1 and claim 2 is known from the US 5,544,626 A .
  • the variable valve lift actuator includes a first body to rotate at an angle within a preset angle range through rotation motion of a high speed cam coupled to a camshaft, a second body coupled to the first body or decoupled from the first body to rotate at an angle within a preset angle range such that a valve is open or closed through the rotation motion of the high speed cam when the second body is coupled to the first body, a latching pin provided retractably forward the first body through the second body such that the first body is coupled to the second body or decoupled from the second body, a driving module to retractably actuate the latching pin, a rotation shaft provided on the valve while traversing both sidewalls of the first and second bodies such that the first body is rotatable, and a return spring fitted around the rotation shaft to provide restoring force for the first body such that the first body rotated by the high speed cam returns to an original position thereof.
  • a deactivation control operation of the valve is performed to deactivate a cylinder by operating the latching pin to de
  • variable valve lift actuator includes a first body to rotate at an angle within a preset angle range through rotation motion of a high speed cam coupled to a camshaft, a second body coupled to the first body or decoupled from the first body to rotate through the rotation motion of a high speed cam when being coupled to the first body, and to rotate through rotation motion of low speed cams provided at both sides of the high speed cam when being decoupled from the first body such that a lift amount of a valve is controlled, a latching pin provided retractably forward the first body through the second body such that the first body is coupled to the second body or decoupled from the second body, a driving module to retractably actuate the latching pin, a rotation shaft provided on the valve while traversing both sidewalls of the first and second bodies such that the first body is rotatable, and a return spring fitted around the rotation shaft to provide restoring force for the first body such that the first body rotated by the cam returns to an original position thereof.
  • the lift amount of the valve includes a first body to rotate at an angle
  • the present invention is made in order to solve the problems occurring in the related art, and an object of the present invention is to provide a variable valve lift actuator of an engine, capable of controlling a lift amount of a valve according to driving conditions of a vehicle.
  • Another object of the present invention is to provide a variable valve lift actuator of an engine, capable of deactivating some cylinders at a low-speed and low-load state of a vehicle.
  • Still another object of the present invention is to provide a variable valve lift actuator of an engine, capable of improving workability in a manufacturing work, and improving dynamic characteristics by decreasing weight and inertia.
  • the second body comprises a front wall, inner sidewalls, and outer sidewalls provided at a front surface and both sides of the second body, respectively, to be arranged correspoinding to a front surface and both sides of the first body; a pressing plate mounted at each of both sides of the front wall of the second body to press an upper end of the valve through rotation motion of the second body, and a support plate provided at a rear end portion of the inner sidewall to be supported in contact with an upper end of a pivot support member, and wherein the return spring has a central portion protruding to be supported to the front surface of the second body, and both ends supported to support steps formed at the both sidewalls of the first body.
  • the deactivation control operation of the valve to deactivate some cylinders and the variable two-stage control operation at the high-speed mode and low-speed mode can be performed according to the operating conditions of the engine.
  • the first and second bodies are coupled to or decoupled from each other using the latching pin to realize the opening and closing operation and the deactivation control operation of the valve, so that some cylinders can be deactivated at the low-speed and low-load state of the engine.
  • the fuel consumption can be minimized at the low-speed and low-load state of the engine to improve the efficiency of the engine and maximize the fuel efficiency of the vehicle.
  • the return spring is mounted at both sides of the first body to return the first body to the original position thereof, the head machining work of the first body, which is required when the compressive spring is mounted in contact with a lower portion of the first body according to the related art, can be omitted.
  • the head machining work of the first body which is required as the compressive spring is employed in the related art, is omitted, the workability can be improved, and the configuration of the variable valve lift actuator can be simplified, so that the variable valve lift actuator can be easily applied to the engine of an actual vehicle.
  • the weight and the inertial are decreased, so that dynamic characteristics may be improved.
  • the first and second bodies have respective rollers thereof to receive rotational force in contact with the cam, thereby minimizing power loss resulting from the friction with the cam, so that the fuel efficiency of the vehicle can be improved.
  • the latching spring to provide the restoring force for the latching pin is omitted, and the latching pin is integrally coupled to the T-shaped front end portion of the solenoid to move forward and backward the latching pin. Accordingly, the operability of the latching pin can be improved in a latching operation, and the number of components can be reduced, so that the manufacturing cost can be saved.
  • variable valve lift actuator of an engine according to an exemplary embodiment of the present invention will be described in detail with reference to accompanying drawings.
  • variable valve lift actuator of the engine according to the present invention is configured to perform a deactivation control operation of activating or deactivating a cylinder according to driving conditions of a vehicle and a variable two-stage control operation of controlling a lift amount of a valve in two stages of high and low speeds.
  • the configuration of realizing the deactivation control operation of the valve will be described according to a first embodiment, and the configuration of realizing the variable two-stage control operation of variably controlling the valve in two stages will be described according to a second embodiment based on the configuration of the first embodiment.
  • one cam may be mounted on a camshaft of the engine in the case that the deactivation control operation is realized, and a high speed cam and low-speed cams provided at both sides of the high speed cam may be mounted on the camshaft of the engine in the case that the variable two-stage control operation is realized.
  • FIG. 1 is a perspective view showing the variable valve lift actuator of an engine according to a first embodiment of the present invention
  • FIG. 2 is an exploded perspective view showing the variable valve lift actuator of the engine shown in FIG. 1
  • FIG. 3 is a partially exploded sectional surface view showing a carrier in which the variable valve lift actuator of the engine shown in FIG. 1 is mounted.
  • the variable valve lift actuator of the engine includes a first body 20 rotated at an angle within a preset angle range by rotating a cam coupled to a camshaft, a second body 30 to maintain a valve 14 in an opening state or closing state based on the coupling state of the first body 20, a latching pin 40 provided retractably forward of the first body 20 so that the first body 20 is coupled to or decoupled from the second body 30, and a driving module 50 to retractably actuate the latching pin 40.
  • the first body 20 is mounted on a rotation shaft 21 that performs rotation motion, and a return spring 15 may be further provided to provide restoring force to return the first body 20 rotated by the cam 11 to the original position of the first body 20.
  • the return spring 15 may include a torsion spring having the center protruding forward.
  • the central portion of the return spring 15 protrudes forward to be supported by a front wall 31 of a second body 30 to be described below, and both ends of the return spring 15 may be supported by support steps 26 formed at both sidewalls of the first body 20 to be described below.
  • the return spring to return the first body according to the present invention to the original position thereof is mounted on the rotation shaft of the first body, a head machining process of the first body, which is required when the compressive spring is mounted under the first body in contact with the first body according to the related art, may be omitted.
  • variable valve lift actuator of the engine has a simple configuration, so that the variable valve lift actuator can be easily applied to the engine of an actual vehicle.
  • the first body 20 may have both sidewalls and a rear wall so that the sectional surface of the first body 20 has a substantially U shape having an open front portion when viewed from the top.
  • a rotation roller 22 may be mounted in the first body 20 to rotate according to the rotation of the cam 11 in order to minimize friction when the rotation roller 22 makes contact with the cam 11.
  • a latching spring which provides restoring force to the latching pin 40, is not provided in the first body 20.
  • Coupling holes 23 coupled to the rotation shaft 21 may be formed in front ends of both sidewalls of the first body 20, and mounting holes 25, into which a roller shaft 24 of the rotation roller 22 is inserted, may be formed at centers of the both sidewalls of the first body 20.
  • the rotation shaft 21 may be coupled to the both sidewalls of the first body 20 and both sidewalls of the second body 30 while passing through the both sidewalls of the first and second bodies 20 and 30, and the return spring 15 may be fitted around an outer circumference of the central portion of the rotation shaft 21.
  • the first body 20 may be rotated about the rotation shaft 21.
  • the roller shaft 24 is coupled to a pair of mounting holes 25 formed in both sidewalls of the first body 20 while passing through the mounting holes 25, and a bearing may be interposed between the roller shaft 24 and the rotation roller 22 so that the rotation roller 22 may be smoothly rotated.
  • the support steps 26 may be formed on inner surfaces of the both sidewalls of the first body 20 to support both ends of the return spring 15, respectively.
  • first body 20 may be provided at a rear wall thereof with a locking step 27, to which the latching pin 40 is locked, so that the first and second bodies 20 and 30 are integrally rotated according to the rotation of the cam 11 when the latching pin 40 is moved forward.
  • the second body 30 may include the front wall 31, both sidewalls, and a rear surface that is open, to have a U shape when viewed from the top and to be arranged corresponding to a front surface and both lateral sides of the first body 20, respectively.
  • Each sidewall of the second body 30 may include an inner sidewall 32 and an outer sidewall 33.
  • a pressing plate 34 may be mounted at each of both sides of the front wall 31 of the second body 30 and interposed between the inner sidewall 32 and the outer sidewall 33 to press an upper end of the valve 14.
  • the pressing plates 34 may be mounted in a horizontal direction, and press the upper end of the valve 14 when the second body 20 is rotated to move up or down the upper end of the valve 14, thereby opening or closing the valve 14.
  • a rear end portion of the second body 30 may be supported by pivot support members 16.
  • the pivot support member 16 may include a hydraulic lash adjuster to automatically adjust an opening of the valve 14 using hydraulic pressure.
  • the hydraulic lash adjuster extends or contracts depending on the variation in the pressure of oil in the state that the hydraulic lash adjuster is constantly supplied with oil therein, thereby finely adjusting the opening of the valve 14.
  • the hydraulic lash adjuster is maintained in a contacting state as a check valve provided in the hydraulic lash adjuster is maintained in a closing state.
  • the hydraulic lash adjuster extends to move up the rear end of the second body 30, so that the opening of the valve 14 can be adjusted.
  • support plates 35 may be formed outside a pair of inner sidewalls 32 of the second body 30 to be supported in contact with upper ends of the pivot support members.
  • the second body 30 may rotate about the pivot support member 16.
  • the second body 30 is provided at a lower end portion thereof with a mounting part 36 allowing the latching pin 40 to slidably move forward, and a moving space 37 (see FIG. 4 ) may be formed at the central portion of the mounting part 36 in a forward-backward direction.
  • the mounting part 36 may be interposed between rear end portions of a pair of inner sidewalls 32 of the second body 30.
  • the latching pin 40 is integrally coupled to a solenoid pin 51 of the driving module 50, and may move forward or backward as the solenoid pin 51 moves forward or backward.
  • the latching pin 40 may be formed in the shape of a cylinder having a substantially circular or oval-shaped sectional surface, and formed therein with a mounting space 41 corresponding to a front end of the solenoid pin 51 formed in a substantially T shape.
  • the driving module 50 may be provided in the form of a solenoid to move forward and backward the solenoid pin 51 according to a control signal of an electronic control unit (not shown) to control the operation of the engine.
  • the solenoid For example, if power is applied to the solenoid by the control signal in the state that a front end portion of the solenoid pin 51 is mounted in the latching pin 40, the solenoid generates a magnetic field from an internal winding coil to move forward the solenoid pin 51 and to press the latching pin 40 so that the latching pin 40 is moved.
  • FIG. 3 is a partially enlarged sectional surface showing a carrier in which the variable valve lift actuator of the engine shown in FIG. 1 is mounted.
  • variable valve lift actuators of the engine may be provided in number corresponding to that of cylinders of the engine, and mounted to be inclined at a preset angle with respect to the upper portion of a carrier 60.
  • variable valve lift actuator of the engine according to the first embodiment of the present invention will be described in detail with reference to FIGS. 4 and 5 .
  • FIGS. 4 and 5 are views showing the operating state of the variable valve lift actuator of the engine according to the first embodiment of the present invention.
  • FIG. 4 is a view showing the operation state of opening or closing the valve through the rotation motion of the cam in the variable valve lift actuator of the engine.
  • FIG. 5 shows the operating state of controlling the deactivation of the valve.
  • variable valve lift actuator of the engine operates the driving module 50 to move forward the latching pin 40 as shown in FIG. 4 when opening or closing the valve 14 through the rotation motion of the cam 11.
  • variable valve lift actuator of the engine may open or close the valve 14 by moving up or down the valve 14 as the first and second bodies 20 and 30 are rotated at an angle within a preset angle range through the rotation motion of the cam 11.
  • the central portion of the return spring 15 fitted around the rotation shaft 21 is supported to the lower end of the front wall 31 of the second body 31, and both ends of the return spring 15 are supported to the support steps 26 formed at both sidewalls of the first body 20.
  • the return spring 15 provides the restoring force to the first body 20 so that the first and second bodies 20 and 30 rotated by the cam 11 may be returned to the original positions thereof.
  • variable valve lift actuator according to the first embodiment of the present invention, the power applied to the driving module 50 is cut off by the control signal of the electronic control unit in the case that the deactivation control operation of the valve 14 is realized to deactivate a portion of the cylinders.
  • the latching pin 40 is returned to the original position thereof as the solenoid pin 51 of the driving module 50 is moved backward as shown in FIG. 5 .
  • variable valve lift actuator of the engine according to the first embodiment of the present invention, even if the cam 11 is rotated, since the second body 30 is fixed in contact with the upper end of the valve 14, the deactivation control operation of the valve 14 can be realized.
  • the opening or closing operation of the valve and the deactivation control operation can be realized by selectively coupling or decoupling the first body to or from the second body using the latching pin, so that a portion of the cylinders can be deactivated in the low-speed and low-load state of the engine.
  • the fuel consumption can be minimized at the low-speed and low-load state to improve the efficiency of the engine and maximize the fuel efficiency of the vehicle.
  • the deactivation control operation of the valve may be performed to deactivate some cylinders according to the operating conditions of the engine.
  • variable valve lift actuator of an engine according to the second embodiment of the present invention will be described in detail with reference to FIGS. 6 and 7 .
  • FIG. 6 is a perspective view showing the variable valve lift actuator of the engine according to the second embodiment of the present invention.
  • FIG. 7 is an exploded perspective view showing the variable valve lift actuator of the engine shown in FIG. 6 .
  • variable valve lift actuator of the engine according to the second embodiment of the present invention has the configuration similar to that of the first embodiment as shown in FIGS. 6 and 7 except that additional components may be further provided to perform the variable two-stage control operation for the lift amount of the valve according to the operating conditions of the engine at a high-speed or low-speed mode.
  • a high speed cam 12 which is used to control the lift amount of the valve 14 to a maximum value at a high-speed and high-load state of the engine
  • a low-speed cam 13 which is used to control the lift amount of the valve 14 to a minimum value at the low-speed and low-load state of the engine, may be mounted on the camshaft 10.
  • the high speed cam 12 may be manufactured in a shape corresponding to that of the cam 11 according to the first embodiment.
  • a pair of low-speed cams 13 may be provided so that the low-speed cams 13 make contact with both sides of the second body 30, and may be mounted at both sides of the second body 30.
  • Each low-speed cam 13 has a diameter less than the maximum diameter of the high speed cam 12.
  • First and second rollers 38 and 39 may be mounted at both sides of the second body 30 to perform rotation motion in contact with the low-speed cams 13 at the low-speed and low-load state of the engine.
  • the outer sidewalls 33 of the second body 30 may extend with lengths corresponding to the lengths of the inner sidewalls 32, and the pressing plate 34 and the support plate 35 may be formed between the outer sidewall 33 and the inner sidewall 32.
  • roller shaft 24 may extend with a length corresponding to the distance between a pair of outer sidewalls 33 of the second body 30.
  • the first and second rollers 38 and 39 may be rotatably mounted on a roller shaft 24 through-coupled to the inner sidewalls 32 and the outer sidewalls 33 at both sides of the second body 30, respectively.
  • variable valve lift actuator of the engine according to the second embodiment of the present invention will be described in detail with reference to FIGS. 8 and 9 .
  • FIGS. 8 and 9 show the operating state of the variable valve lift actuator of the engine according to the second embodiment of the present invention.
  • FIG. 8 shows the operating state of the variable valve lift actuator of the engine, which operates at the high-speed mode when the engine is at the high-speed and high-load state.
  • FIG. 9 shows the operating state of the variable valve lift actuator of the engine, which operates at the low-speed mode when the engine is at the low-speed and low-load state.
  • variable valve lift actuator of the engine operates the driving module 50 to move forward the latching pin 40 as shown in FIG. 8 when the engine is at the high-speed and high-load state of the engine.
  • the front end portion of the latching pin 40 protrudes forward through the mounting part 36 of the second body 30 while be locked to the locking step 27 formed on the rear wall of the first body 20 to couple the first body 20 to the second body 30.
  • the first body 20 makes contact with the high speed cam 12 mounted on the camshaft 10 to perform rotation motion together with the second body 30.
  • variable valve lift actuator of the engine rotates the first and second bodies 20 and 30 at an angle within a present angle range through the rotation motion of the high speed cam 12 while moving up or down the valve 14 to open or close the valve 14.
  • variable valve lift actuator of the engine operates in the state that the mounting part 36 of the body 30 is received therein and the first and second bodies 20 and 30 are decoupled from each other as shown in FIG. 9 at the low-speed and low-load state of the engine.
  • first and second rollers 38 and 39 mounted in the second body 30 perform rotation motion in contact with a pair of low speed cams 13 mounted on the camshaft 10.
  • the second body 30 rotates about the pivot support member 16 to open or close the valve 14 as the low speed cam 13 rotates.
  • the first and second bodies are coupled to or decoupled from each other using the latching pin so that the lift amount of the valve can be controlled in two stages of high and low speed modes through the rotation motion of the high speed cam and the low speed cam.
  • the deactivation control operation of the valve may be realized.
  • the two-stage control operation and the deactivation control operation of the valve may be realized according to the configuration of the cam by changing only the components of the cam and using the configuration of the second embodiment.
  • FIG. 10 is a perspective view showing a variable valve lift actuator of an engine according to the third embodiment of the present invention.
  • variable valve lift actuator according to the third embodiment of the present invention has a configuration similar to that of the second embodiment as shown in FIG. 10 except that the front wall is provided at the central portion thereof with a mounting hole to fix upper and lower ends of the central portion of the return spring to improve latching performance.
  • the front wall may include a first fixing bar, which fixes the upper end of the central portion of the return spring, a second fixing bar, which fixes the lower end of the central portion of the return spring, while interposing the mounting hole between the first and second fixing bars.
  • the central portion of the return spring may be fixedly mounted in the mounting hole between the first and second fixing bars constituting the front wall of the second body, and both ends of the return spring may be supported to the support steps formed on both sidewalls of the first body.
  • the return spring may provide the restoring force to return the first body rotated by the cam to the original position thereof, and may facilitate a latching function of the latching pin based on the retractable motion of the latching pin.
  • the deactivation control operation of the valve to deactivate a portion of the cylinders and the variable two-stage control operation at the high-speed mode and low-speed mode can be performed according to the operating conditions of the engine.
  • the present invention is applied to a variable valve lift actuator technology of an engine to perform the deactivation control operation of the valve to deactivate a portion of the cylinders and the variable two-stage control operation at the high-speed mode and low-speed mode.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
EP16163100.7A 2015-11-30 2016-03-31 Variable valve lift actuator of engine Active EP3173594B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
KR1020150168362A KR101716315B1 (ko) 2015-11-30 2015-11-30 엔진의 가변밸브 리프트 장치
KR20150168363 2015-11-30
KR1020160008088A KR101736806B1 (ko) 2015-11-30 2016-01-22 엔진의 가변밸브 리프트 장치

Publications (2)

Publication Number Publication Date
EP3173594A1 EP3173594A1 (en) 2017-05-31
EP3173594B1 true EP3173594B1 (en) 2019-12-18

Family

ID=55642342

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16163100.7A Active EP3173594B1 (en) 2015-11-30 2016-03-31 Variable valve lift actuator of engine

Country Status (2)

Country Link
EP (1) EP3173594B1 (ja)
JP (1) JP6258383B2 (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022171260A1 (en) * 2021-02-12 2022-08-18 Eaton Intelligent Power Limited Deactivating valvetrain assembly

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101945286B1 (ko) * 2017-08-10 2019-02-08 (주)모토닉 엔진의 가변밸브 리프트 장치

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5544626A (en) * 1995-03-09 1996-08-13 Ford Motor Company Finger follower rocker arm with engine valve deactivator
JP4191891B2 (ja) * 2000-12-21 2008-12-03 本田技研工業株式会社 ロッカアーム
US7934477B2 (en) * 2008-08-25 2011-05-03 GM Global Technology Operations LLC Rocker arm assembly
KR101084739B1 (ko) 2009-03-31 2011-11-22 (주)모토닉 엔진의 연속가변밸브 리프트 장치
KR101084741B1 (ko) 2009-06-10 2011-11-22 (주)모토닉 엔진의 연속가변밸브 리프트 장치
KR101244845B1 (ko) 2011-01-31 2013-03-19 (주)모토닉 엔진의 가변밸브 리프트 장치
EP2653673A1 (en) * 2012-04-19 2013-10-23 Eaton S.r.l. A switchable rocker arm
JP2015534005A (ja) * 2012-11-05 2015-11-26 イートン コーポレーションＥａｔｏｎ Ｃｏｒｐｏｒａｔｉｏｎ 内燃機関における気筒休止のためのスイッチングローラーフィンガーフォロワーの開発
JP2015010554A (ja) * 2013-06-28 2015-01-19 ヤマハ発動機株式会社 エンジン
KR101465635B1 (ko) 2014-06-19 2014-11-27 (주)모토닉 엔진의 가변밸브 리프트 장치
KR101465636B1 (ko) * 2014-06-19 2014-11-27 (주)모토닉 엔진의 가변밸브 리프트 장치

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022171260A1 (en) * 2021-02-12 2022-08-18 Eaton Intelligent Power Limited Deactivating valvetrain assembly

Also Published As

Publication number Publication date
JP2017101651A (ja) 2017-06-08
JP6258383B2 (ja) 2018-01-10
EP3173594A1 (en) 2017-05-31

Similar Documents

Publication Publication Date Title
JP4827865B2 (ja) 内燃機関の可変動弁装置
EP1533486B1 (en) Valve-actuating device for internal combustion engine
EP3620624B1 (en) Switchable rocker arm and roller retainer thereof
US8402933B2 (en) Rocker arm changeover device for engine
US6067947A (en) Valve driving apparatus for engine
EP1515009A1 (en) Engine valve driver
EP3173594B1 (en) Variable valve lift actuator of engine
US9464544B2 (en) Variable valve lift apparatus of engine
JP4829562B2 (ja) 内燃機関用直動型バルブリフタ
KR101716321B1 (ko) 엔진의 가변밸브 리프트 장치
US10450903B2 (en) Variable valve lift actuator of engine
EP1878883B1 (en) Valve operating device for internal combustion engine
KR101736806B1 (ko) 엔진의 가변밸브 리프트 장치
US5870984A (en) Variable engine valve driver
KR101675511B1 (ko) 엔진의 가변밸브 리프트 장치
US10533465B2 (en) Variable valve lift actuator of engine
US20090272346A1 (en) Continuous variable valve lift apparatus
KR101716315B1 (ko) 엔진의 가변밸브 리프트 장치
US7918201B2 (en) Variable valve mechanism for engine
US7469668B2 (en) Valve-moving device for engine
JPH10212913A (ja) 可変バルブリフト装置
US7673603B2 (en) Valve timing control device and engine device and vehicle including the same
JP3933290B2 (ja) 内燃機関の吸排気弁駆動制御装置
JPH07102923A (ja) 直動型可変バルブ作動装置
JP2002122011A (ja) 内燃機関の動弁装置

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20160502

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

17Q First examination report despatched

Effective date: 20190214

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

INTG Intention to grant announced

Effective date: 20190626

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAJ Information related to disapproval of communication of intention to grant by the applicant or resumption of examination proceedings by the epo deleted

Free format text: ORIGINAL CODE: EPIDOSDIGR1

GRAL Information related to payment of fee for publishing/printing deleted

Free format text: ORIGINAL CODE: EPIDOSDIGR3

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

GRAR Information related to intention to grant a patent recorded

Free format text: ORIGINAL CODE: EPIDOSNIGR71

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE PATENT HAS BEEN GRANTED

INTC Intention to grant announced (deleted)
INTG Intention to grant announced

Effective date: 20191106

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 602016026235

Country of ref document: DE

REG Reference to a national code

Ref country code: AT

Ref legal event code: REF

Ref document number: 1214840

Country of ref document: AT

Kind code of ref document: T

Effective date: 20200115

REG Reference to a national code

Ref country code: NL

Ref legal event code: MP

Effective date: 20191218

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20191218

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20191218

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20191218

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200318

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20191218

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200319

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200318

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG4D

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20191218

Ref country code: RS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20191218

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20191218

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200513

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20191218

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20191218

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20191218

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20191218

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200418

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20191218

Ref country code: SM

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20191218

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 602016026235

Country of ref document: DE

REG Reference to a national code

Ref country code: AT

Ref legal event code: MK05

Ref document number: 1214840

Country of ref document: AT

Kind code of ref document: T

Effective date: 20191218

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20191218

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20191218

Ref country code: MC

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20191218

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

26N No opposition filed

Effective date: 20200921

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20191218

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20191218

REG Reference to a national code

Ref country code: BE

Ref legal event code: MM

Effective date: 20200331

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200331

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20191218

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200331

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200331

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200331

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200331

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20191218

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20191218

Ref country code: MT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20191218

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20191218

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20191218

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20230301

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20240319

Year of fee payment: 9

Ref country code: GB

Payment date: 20240322

Year of fee payment: 9