CN111306349A - Oil control valve - Google Patents

Oil control valve Download PDF

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Publication number
CN111306349A
CN111306349A CN201910902276.1A CN201910902276A CN111306349A CN 111306349 A CN111306349 A CN 111306349A CN 201910902276 A CN201910902276 A CN 201910902276A CN 111306349 A CN111306349 A CN 111306349A
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CN
China
Prior art keywords
control valve
frame
communication hole
oil control
oil
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.)
Withdrawn
Application number
CN201910902276.1A
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Chinese (zh)
Inventor
崔命植
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.)
Hyundai Motor Co
Kia Corp
Original Assignee
Hyundai Motor Co
Kia Motors 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
Application filed by Hyundai Motor Co, Kia Motors Corp filed Critical Hyundai Motor Co
Publication of CN111306349A publication Critical patent/CN111306349A/en
Withdrawn legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/44—Mechanical actuating means
    • F16K31/52—Mechanical actuating means with crank, eccentric, or cam
    • F16K31/524—Mechanical actuating means with crank, eccentric, or cam with a cam
    • F16K31/52408—Mechanical actuating means with crank, eccentric, or cam with a cam comprising a lift valve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
    • F01L1/3442—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using hydraulic chambers with variable volume to transmit the rotating force
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L9/00—Valve-gear or valve arrangements actuated non-mechanically
    • F01L9/10—Valve-gear or valve arrangements actuated non-mechanically by fluid means, e.g. hydraulic
    • F01L9/11—Valve-gear or valve arrangements actuated non-mechanically by fluid means, e.g. hydraulic in which the action of a cam is being transmitted to a valve by a liquid column
    • F01L9/12—Valve-gear or valve arrangements actuated non-mechanically by fluid means, e.g. hydraulic in which the action of a cam is being transmitted to a valve by a liquid column with a liquid chamber between a piston actuated by a cam and a piston acting on a valve stem
    • 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
    • F01L13/0015—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
    • 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
    • F01L13/0042—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 being 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
    • F01L9/00—Valve-gear or valve arrangements actuated non-mechanically
    • F01L9/10—Valve-gear or valve arrangements actuated non-mechanically by fluid means, e.g. hydraulic
    • F01L9/11—Valve-gear or valve arrangements actuated non-mechanically by fluid means, e.g. hydraulic in which the action of a cam is being transmitted to a valve by a liquid column
    • 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
    • F01L9/00—Valve-gear or valve arrangements actuated non-mechanically
    • F01L9/10—Valve-gear or valve arrangements actuated non-mechanically by fluid means, e.g. hydraulic
    • F01L9/11—Valve-gear or valve arrangements actuated non-mechanically by fluid means, e.g. hydraulic in which the action of a cam is being transmitted to a valve by a liquid column
    • F01L9/12—Valve-gear or valve arrangements actuated non-mechanically by fluid means, e.g. hydraulic in which the action of a cam is being transmitted to a valve by a liquid column with a liquid chamber between a piston actuated by a cam and a piston acting on a valve stem
    • F01L9/14—Valve-gear or valve arrangements actuated non-mechanically by fluid means, e.g. hydraulic in which the action of a cam is being transmitted to a valve by a liquid column with a liquid chamber between a piston actuated by a cam and a piston acting on a valve stem the volume of the chamber being variable, e.g. for varying the lift or the timing of a valve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K15/00—Check valves
    • F16K15/02—Check valves with guided rigid valve members
    • F16K15/025—Check valves with guided rigid valve members the valve being loaded by a spring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/04—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
    • F16K31/046—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor with electric means, e.g. electric switches, to control the motor or to control a clutch between the valve and the motor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
    • F01L1/3442—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using hydraulic chambers with variable volume to transmit the rotating force
    • F01L2001/34423—Details relating to the hydraulic feeding circuit
    • F01L2001/34426—Oil control 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
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
    • F01L1/3442—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using hydraulic chambers with variable volume to transmit the rotating force
    • F01L2001/3445—Details relating to the hydraulic means for changing the angular relationship
    • F01L2001/34453—Locking means between driving and driven members
    • F01L2001/34459—Locking in multiple positions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
    • F01L1/3442—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using hydraulic chambers with variable volume to transmit the rotating force
    • F01L2001/3445—Details relating to the hydraulic means for changing the angular relationship
    • F01L2001/34453—Locking means between driving and driven members
    • F01L2001/34469—Lock movement parallel to camshaft axis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2820/00—Details on specific features characterising valve gear arrangements
    • F01L2820/01—Absolute values
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2820/00—Details on specific features characterising valve gear arrangements
    • F01L2820/03—Auxiliary actuators
    • F01L2820/033—Hydraulic engines

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

Abstract

The present disclosure provides an oil control valve controlling oil pressures of first and second hydraulic chambers formed in first and second electro-hydraulic valve (EHV) devices, respectively, the first and second EHV devices being driven by first and second cams, respectively, and the first and second valves being connected to lower portions of the first and second EHV devices, respectively, the oil control valve including: a main body including a communication hole having a first end communicating with the first hydraulic chamber and a second end communicating with the second hydraulic chamber; a hollow lower frame formed or fixedly installed at a lower end portion of the main body, having an upper end height disposed in an inner space of the communication hole and an upper portion communicated with the communication hole and a lower portion communicated with an oil passage supplying oil; and a pin frame disposed between the actuator moving up and down and the lower frame to vertically pass through the communication hole and to be in contact with or separated from an upper end of the lower frame, the first end and the second end of the communication hole not being communicated with each other when the pin frame and the lower frame are in contact with each other.

Description

Oil control valve
Cross Reference to Related Applications
This application claims priority and benefit of korean patent application No. 10-2018-.
Technical Field
The present disclosure relates to an Oil Control Valve (OCV). More particularly, the present disclosure relates to an oil control valve that prevents lift deviation between two valves of the same type.
Background
Variable valve control technology is one area used to improve the efficiency of vehicle engines.
Generally, the opening and closing timings of the valves are adjusted by the shape of the cams and the phase difference between the cams to control intake and exhaust of the engine.
A Variable Valve Timing (VVT) device adjusts the opening and closing timings of valves to control the overlap in which intake and exhaust valves are simultaneously opened, and a Variable Valve Lift (VVL) device adjusts the valve lift to control the intake air amount.
As the VVT device evolves into a Continuously Variable Valve Timing (CVVT) device, the VVL device evolves into a Continuously Variable Valve Lift (CVVL) device, and a mechanical electro-hydraulic valve Mechanism (MEHV) device has been developed and actively applied to a vehicle engine.
The MEHV device is a combination of a mechanical valve mechanism and an electro-hydraulic valve (EHV) device, and controls a valve lift by using an oil pressure.
Generally, a MEHV device operates two electro-hydraulic valve (EHV) devices having the same structure and two valves of the same type (intake or exhaust) respectively connected to the devices by using one Oil Control Valve (OCV).
The EHV device is generally driven by a mechanical cam, and a hydraulic chamber is formed in the EHV device, and when oil is supplied to or discharged from the hydraulic chamber through the OCV, the driving effect of the cam is controlled. That is, if the EHV device is cam-driven in a state where sufficient oil is supplied to the EHV device, a valve connected to the EHV device operates, resulting in a valve lift. However, if the EHV device is cam-driven in a state where oil is discharged from the EHV device, a valve connected to the EHV device does not operate.
The conventional MEHV device uses an OCV configured to allow two EHV devices to communicate with each other to smoothly supply oil. Therefore, when there is an oil pressure difference between the two EHV devices, oil pulsation may occur between the two EHV devices, and thus lift deviation occurs between the two valves respectively connected to the two EHV devices.
Fig. 5 is a graph showing a valve lift according to a cam angle when a conventional oil control valve is applied.
Referring to fig. 5, a lift deviation occurs between the left and right valves. In this state, combustion imbalance between the engine cylinders may occur, and fuel efficiency, emission, or knock characteristics may deteriorate.
The above information disclosed in this background section is only for enhancement of understanding of the background of the invention and therefore it may contain information that does not form the prior art that is already known to a person skilled in the art.
Disclosure of Invention
The present disclosure provides an oil control valve for preventing lift deviation between two valves.
The present disclosure provides an oil control valve that controls oil pressures of first and second hydraulic chambers formed in first and second electro-hydraulic valve (EHV) devices, respectively, the first and second EHV devices being driven by first and second cams, respectively, and the first and second valves being connected to lower portions of the first and second EHV devices, respectively, the oil control valve may include: a main body including a communication hole, and the communication hole having a first end communicating with the first hydraulic chamber and a second end communicating with the second hydraulic chamber; a hollow lower frame formed or fixedly installed at a lower end portion of the main body, and having an upper end height disposed at an inner space of the communication hole such that an upper portion is communicated with the communication hole and a lower portion is communicated with an oil passage supplying oil; and a pin frame disposed between the actuator moving up and down and the hollow lower frame to vertically pass through the communication hole and to contact or separate from an upper end of the hollow lower frame, wherein when the pin frame and the hollow lower frame contact each other, a first end and a second end of the communication hole do not communicate with each other.
The pin frame may be hollow, and the oil control valve may further include a spring that applies a restoring force to the pin frame since an upper end is connected to an upper portion of the pin frame and a lower end is connected to a support portion formed in an inner space of the hollow lower frame.
The actuator may be operated up and down by a solenoid.
The pin frame may be integrally formed with the lower end portion of the actuator.
The lower frame, the communication hole, and the pin frame may have a cylindrical shape, respectively, and diameters of the lower frame and the pin frame may be larger than a diameter of the communication hole.
A chamfer may be formed on the pin frame along an outer circumferential surface of a lower end of the pin frame, and a chamfered surface may be formed on an upper end of the lower frame to maintain a fixed state and an airtight state by cooperating with the chamfer.
In the oil control valve according to an exemplary embodiment of the present disclosure, when the pin frame is separated from the lower frame, since oil is discharged from the first and second EHV devices, the first and second valves may not be operated although the first and second cams are operated.
In the oil control valve, when the pin frame is in contact with the lower frame, the first valve and the second valve may be operated by operation of the first cam and the second cam.
As described above, according to the present disclosure, since lift curves between two valves are identical to each other, fuel efficiency and emissions may be improved, and occurrence of knocking may be reduced.
Drawings
Fig. 1 is a schematic diagram of a valve mechanism structure mounted with an oil control valve according to an exemplary embodiment of the present disclosure.
Fig. 2 is a side view of a valve mechanism structure with an oil control valve mounted thereto according to an exemplary embodiment of the present disclosure.
FIG. 3 is a cross-sectional view along line A-A of an oil control valve according to an exemplary embodiment of the present disclosure.
FIG. 4 is a cross-sectional view of an oil control valve along line B-B according to an exemplary embodiment of the present disclosure.
Fig. 5 is a graph showing a valve lift according to a cam angle when a conventional oil control valve is applied.
Fig. 6 is a graph illustrating a valve lift according to a cam angle when an oil control valve according to an exemplary embodiment of the present disclosure is applied.
Detailed Description
The present disclosure now will be described more fully hereinafter with reference to the accompanying drawings, in which exemplary embodiments of the disclosure are shown.
The exemplary embodiments are examples of the present disclosure and may be modified in various ways by those skilled in the art, and thus the scope of the present disclosure is not limited to the exemplary embodiments to be described below.
Throughout this specification, unless explicitly stated otherwise, the word "comprise", or variations such as "comprises" or "comprising", will be understood to imply the inclusion of further elements but not the exclusion of any other elements. Further, the names of the components do not limit their functions.
Fig. 1 is a schematic diagram of a valve mechanism structure mounted with an oil control valve according to an exemplary embodiment of the present disclosure.
Fig. 2 is a side view of a valve mechanism structure with an oil control valve mounted thereto according to an exemplary embodiment of the present disclosure.
Referring to fig. 1 and 2, the oil control valve 10 according to an exemplary embodiment is configured to control oil pressures of a first hydraulic chamber 21a and a second hydraulic chamber 22a formed in a first electro-hydraulic valve (EHV) device 21 and a second electro-hydraulic valve (EHV) device 22, respectively. The first EHV device 21 and the second EHV device 22 are driven by the first cam 1 and the second cam 2, respectively, and the first valve 3 and the second valve 4 are connected to lower portions of the first EHV device 21 and the second EHV device 22, respectively. Therefore, the operations of the first valve 3 and the second valve 4 are controlled by the oil control valve 10.
The oil control valve 10 may include: a main body 30 including a communication hole 312, and the communication hole 312 includes a first end 31 communicating with the first hydraulic chamber 21a and a second end 32 communicating with the second hydraulic chamber 22 a; a hollow lower frame 40 formed or fixedly installed at a lower end portion of the main body 30, and having an upper end height disposed at an inner space of the communication hole 312 such that an upper portion is communicated with the communication hole 312 and a lower portion is communicated with the oil passage 34 supplying the oil; and a pin frame 50 disposed between the actuator 15 moving up and down and the lower frame 40 to vertically pass through the communication hole 312 and to contact or separate from the upper end of the lower frame 40.
The oil control valve 10 is configured such that the first end 31 and the second end 32 of the communication hole 312 do not communicate with each other when the pin frame 50 and the lower frame 40 contact each other. That is, the first end 31 and the second end 32 are blocked by the lower frame 40 and the pin frame 50.
For this, the lower frame 40, the communication hole 312, and the pin frame 50 may have a cylindrical shape, respectively, and the lower frame 40 and the pin frame 50 may have a diameter larger than that of the communication hole 312. However, the exemplary embodiment is not limited thereto, and any structure is allowed as long as the lower frame 40 and the pin frame 50 block the inside of the communication hole 312 such that the first end 31 and the second end 32 of the communication hole 312 do not communicate with each other when the lower frame 40 and the pin frame 50 are in contact.
The first hydraulic chamber 21a and the first end 31 of the communication hole 312 may communicate through the left tube 5, and the second hydraulic chamber 22a and the second end 32 of the communication hole 312 may communicate through the right tube 6. In this case, the left and right tubes 5 and 6 may be formed in the cylinder head 7. The oil control valve 10 is typically mounted on the cylinder head 7.
Mechanisms in which the first and second hydraulic chambers 21a and 22a are formed in the first and second EHV devices 21 and 22, respectively, are well known to those skilled in the art, and thus detailed description is omitted.
When the pin frame 50 is separated from the upper end of the lower frame 40, the first and second EHV devices 21 and 22 may communicate with each other through the first and second hydraulic chambers 21a and 22a, the left and right tubes 5 and 6, and the communication hole 312.
Also, referring to fig. 2, the valve mechanism structure mounted with the oil control valve 10 according to the exemplary embodiment may further include a reservoir 25 formed in the cylinder head 7. In this case, when the oil control valve 10 is opened, that is, when the pin frame 50 is separated from the lower frame 40, the valve mechanism structure may be formed such that oil in the first and second EHV devices 21 and 22 may be accumulated in the reservoir 25. By the oil flowing to the reservoir 25, the first valve 3 and the second valve 4 are closed although the first cam 1 and the second cam 2 operate.
Referring to fig. 1, in an oil control valve 10 according to an exemplary embodiment, a pin frame 50 may be hollow. Also, the oil control valve 10 may further include a spring 60, the spring 60 applying a restoring force to the pin frame 50 as an upper end thereof is connected to an upper portion of the pin frame 50 and a lower end thereof is connected to the support portion 35 formed in the inner space of the lower frame 40.
The actuator 15 provided in the oil control valve 10 may be operated up and down by a solenoid (solenoid). In this case, when current is applied to the oil control valve 10, the actuator 15 operates upward or downward.
Therefore, when the actuator 15 is operated downward such that the pin frame 50 is in contact with the lower frame 40, the spring 60 may be compressed, and when the actuator 15 is operated upward such that the pin frame 50 is separated from the lower frame 40, the spring 60 may be extended. When the current applied to the oil control valve 10 is cut off, the pin frame 50 may return to the original position of the pin frame 50 by the restoring force of the compressed or extended spring 60.
The pin frame 50 may be integrally formed with the lower end of the actuator 15, but need not be so. The pin frame 50 may be a separate component from the actuator 15. The pin frame 50 may be selectively contacted or separated from the lower frame 40 by the actuator 15 and the spring 60.
FIG. 3 is a cross-sectional view along line A-A of an oil control valve according to an exemplary embodiment of the present disclosure.
FIG. 4 is a cross-sectional view of an oil control valve along line B-B according to an exemplary embodiment of the present disclosure.
Referring to fig. 3 and 4, in the oil control valve 10 according to the exemplary embodiment of the present disclosure, a chamfer 52 may be formed on the pin frame 50 along an outer circumferential surface of a lower end of the pin frame 50, and a chamfer surface 42 may be formed on an upper end of the lower frame 40 to maintain a fixed state and an airtight state by cooperating with the chamfer 52. The combination of the chamfer 52 and the chamfer surface 42 can ensure achievement of the fixed state of the pin frame 50 and the lower frame 40 and the airtight state between the first end and the second end of the communication hole 312.
Fig. 3 and 4 both show a state in which the lower frame 40 and the pin frame 50 are separated from each other. Oil may be supplied to the first and second EHV devices 21 and 22 through the separation gap and the communication hole 312, or oil may be discharged from the first and second EHV devices 21 and 22 to the reservoir 25.
Referring to fig. 1, 3 and 4, the oil control valve 10 according to an exemplary embodiment of the present disclosure is configured such that when the pin frame 50 is separated from the lower frame 40, the first and second valves 3 and 4 do not operate although the first and second cams 1 and 2 operate since oil is discharged from the first and second EHV devices 21 and 22.
The oil control valve 10 is configured such that the first valve 3 and the second valve 4 are operated by the operation of the first cam 1 and the second cam 2 when the pin frame 50 is in contact with the lower frame 40.
Fig. 6 is a graph illustrating a valve lift according to a cam angle when an oil control valve according to an exemplary embodiment of the present disclosure is applied.
Referring to fig. 6, if the oil control valve 10 is used, it can be confirmed that the lifts of the first valve 3 and the second valve 4 are substantially identical. This is because when the communication hole 312 is not blocked by the lower frame 40 and the pin frame 50, the first EHV device 21 and the second EHV device 22 communicate with each other so that the pressures become equal, and in the case of blocking, the first EHV device 21 and the second EHV device 22 are fluidly separated from each other at the same pressure and operate independently.
While the present disclosure has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the disclosure is not limited to the disclosed embodiments. On the contrary, the disclosure is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims (8)

1. An oil control valve that controls oil pressures of first and second hydraulic chambers formed in first and second electro-hydraulic valve devices, namely first and second EHV devices, respectively, which are driven by first and second cams, respectively, and to which first and second valves are connected to lower portions of the first and second EHV devices, respectively, comprising:
a main body including a communication hole, and the communication hole having a first end communicating with the first hydraulic chamber and a second end communicating with the second hydraulic chamber;
a hollow lower frame formed or fixedly installed at a lower end portion of the main body, and having an upper end height disposed at an inner space of the communication hole such that an upper portion is communicated with the communication hole and a lower portion is communicated with an oil passage supplying oil; and
a pin frame disposed between the actuator moving up and down and the hollow lower frame to vertically pass through the communication hole and to be in contact with or separated from an upper end of the hollow lower frame,
wherein the first end and the second end of the communication hole are not communicated with each other when the pin frame and the hollow lower frame are in contact with each other.
2. The oil control valve of claim 1,
the pin frame is hollow, and
the oil control valve further includes a spring which applies a restoring force to the pin frame due to an upper end connected to an upper portion of the pin frame and a lower end connected to a support portion formed in an inner space of the hollow lower frame.
3. The oil control valve of claim 1,
the actuator is operated up and down by a solenoid.
4. The oil control valve of claim 1,
the pin frame is integrally formed with a lower end portion of the actuator.
5. The oil control valve of claim 1,
the hollow lower frame, the communication hole, and the pin frame have cylindrical shapes, respectively, and diameters of the hollow lower frame and the pin frame are larger than a diameter of the communication hole.
6. The oil control valve of claim 1,
a chamfer is formed on the pin frame along an outer peripheral surface of a lower end of the pin frame, and
a chamfered surface is formed at an upper end of the lower frame to maintain a fixed state and an airtight state by fitting with the chamfer.
7. The oil control valve of claim 1,
when the pin frame is separated from the hollow lower frame, since oil is discharged from the first and second EHV devices, the first and second valves do not operate although the first and second cams operate.
8. The oil control valve of claim 1,
the first and second valves are operated by operation of the first and second cams when the pin frame is in contact with the hollow lower frame.
CN201910902276.1A 2018-12-11 2019-09-24 Oil control valve Withdrawn CN111306349A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2018-0159341 2018-12-11
KR1020180159341A KR20200071518A (en) 2018-12-11 2018-12-11 Oil control valve

Publications (1)

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Application publication date: 20200619