US20170016357A1 - Valve opening/closing device for engine - Google Patents
Valve opening/closing device for engine Download PDFInfo
- Publication number
- US20170016357A1 US20170016357A1 US14/949,178 US201514949178A US2017016357A1 US 20170016357 A1 US20170016357 A1 US 20170016357A1 US 201514949178 A US201514949178 A US 201514949178A US 2017016357 A1 US2017016357 A1 US 2017016357A1
- Authority
- US
- United States
- Prior art keywords
- valve
- closing device
- valve opening
- valves
- engine
- 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.)
- Abandoned
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/12—Transmitting gear between valve drive and valve
- F01L1/18—Rocking arms or levers
- F01L1/181—Centre pivot rocking arms
-
- 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
-
- 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
- F01L1/185—Overhead end-pivot rocking arms
-
- 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
-
- 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
- F01L2305/00—Valve arrangements comprising rollers
Definitions
- the present disclosure relates to a valve opening/closing device for an engine, and more particularly, to a three-point supported valve opening/closing device.
- a valve opening/closing device is a device which makes a lever motion by rotation of a cam to open or close an intake valve or an exhaust valve by the lever motion.
- a hydraulic lash adjuster may be coupled to the valve opening/closing device.
- the hydraulic lash adjuster is a device for making a valve lifter to move in close contact with the cam, and is also called “valve gap control device”.
- one valve opening/closing device In case that intake valves or exhaust valves are disposed at one cylinder by two, one valve opening/closing device, one hydraulic lash adjuster, and one cam may be required for each intake valve or each exhaust valve.
- the cost of an engine may be increased and it may be complex to supply hydraulic pressure to the hydraulic lash adjuster if one intake valve or one exhaust valve requires one valve opening/closing device, one hydraulic lash adjuster, and one cam.
- the present disclosure provides a valve opening/closing device for an engine having advantages of opening/closing two valves by rotation of one cam.
- the present disclosure provides a valve opening/closing device for an engine having further advantages of applying one hydraulic lash adjuster and easily supplying hydraulic pressure.
- a valve opening/closing device for an engine may make a lever motion by rotation of a cam so as to open or close valves.
- the valve opening/closing device may include: a body portion to which a valve gap control device is mounted and an axis of a lever motion is positioned; an extended portion extended from the body portion toward the valve; and two valve contact portions respectively protruded to both sides from the extended portion so as to function to push the two valves.
- the valve opening/closing device for an engine may be supported on three points by one valve gap control device and two valves.
- the valve opening/closing device for an engine may further include a connecting portion formed to connect the two valve contact portions with each other.
- Both ends of the connecting portion may be bent toward an upper direction so as to be connected with the valve contact portions.
- the two valve contact portions and the connecting portion are formed in flat.
- the valve opening/closing device for an engine may further include blocking protrusions protruded toward each lower direction from the valve contact portions which are respectively protruded to the both sides.
- FIG. 1 is a perspective view showing a state that a valve opening/closing device is connected with a valve and a valve gap control device for an engine according to the present disclosure
- FIG. 2 is a perspective view of a valve opening/closing device for an engine
- FIG. 3 is a perspective view of a valve opening/closing device for an engine according to another embodiment of the present disclosure.
- FIG. 1 is a perspective view showing a state that a valve opening/closing device connected with a valve and a valve gap control device for an engine according to an embodiment of the present disclosure
- FIG. 2 is a perspective view of a valve opening/closing device for an engine according to an embodiment of the present disclosure.
- a valve opening/closing device 1 for an engine is a three-point supported valve opening/closing device 1 that is supported on two valves 30 and one valve gap control device 40 .
- the valve 30 is an intake valve or an exhaust valve of an engine
- the valve gap control device 40 may be a general hydraulic lash adjuster (HLA) as a device for making the valve opening/closing device 1 move in close contact with a cam (not shown).
- HLA hydraulic lash adjuster
- a valve opening/closing device 1 for an engine includes a body portion 10 , an extended portion 12 , a valve contact portion 14 , a connecting portion 16 , a bent portion 17 , a blocking protrusion 18 , and a roller 20 .
- the body portion 10 is a body of the valve opening/closing device 1 that an axis of a lever motion of the valve opening/closing device 1 is positioned thereto.
- the valve gap control device 40 is coupled to a lower side of the body portion 10 .
- a seating portion 15 is formed at the body portion 10 such that the valve gap control device 40 is seated thereon.
- the extended portion 12 is formed to be extended toward the valve 30 from the body portion 10 .
- the valve contact portion 14 is formed at an end of the extended portion 12 which is extended from the body portion 10 .
- the valve contact portion 14 is a part which pushes the valve 30 to be opened in accordance with a lever motion of the valve opening/closing device 1 .
- the valve contact portions 14 are respectively protruded to both sides from the end of the extended portion 12 so as to function to respectively push two valves 30 . That is, the two valve contact portions 14 are formed.
- the connecting portion 16 is formed on the end of the extended portion 12 so as to connect the two valve contact portions 14 with each other. As the connecting portion 16 is formed, it can be prevented that the extended portion 12 and the valve contact portion 14 are twisted or the two valve contact portions 14 are estranged from each other.
- the bent portion 17 is bent toward an upper direction from both ends of the connecting portion 16 so as to be connected with the valve contact portion 14 . As the bent portion 17 is formed, strength of the connecting portion 16 and the valve contact portion 14 can be improved.
- the blocking protrusion 18 is protruded toward each lower direction from each end of the valve contact portions 14 protruded to the both sides. That is, the valve 30 is connected with the valve contact portion 14 between the bent portion 17 and the blocking protrusion 18 . In addition, the bent portion 17 and the blocking protrusion 18 prevents that the valve opening/closing device 1 escapes from the valve 30 and suppresses movement of the valve opening/closing device 1 .
- the roller 20 is provided at the extended portion 12 so as to get a rolling-contact to the cam.
- the roller 20 is rotatably coupled with the extended portion 12 by a roller pivot shaft 25 .
- a part that the valve opening/closing device 1 is contacted to the cam by the valve gap control device 40 is a contact point between the roller 20 and the cam.
- the roller 20 may be substituted to a sliding pad which is integrally formed with the extended portion 12 .
- up and down directions to separate an upper side and a lower side are determined with respect to directions that the cam is disposed at an upper side of the valve opening/closing device 1 and the valve 30 is disposed at a lower side of the valve opening/closing device 1 .
- height difference between the valves 30 may be compensated by a design that a ramp height of the cam is increased when height of contact points, that the two valves 30 are contacted to the each valve contact portion 14 , are different.
- the compensation about height difference between valves 30 can be realized as a shim is interposed between the valve 30 and the valve contact portion 14 depending on a design.
- valve opening/closing device 1 for an engine according to another embodiment of the present disclosure will be described.
- repeated descriptions regarding the constituent elements to same with a valve opening/closing device 1 for an engine that described referring to FIG. 1 to FIG. 2 will be omitted.
- a valve opening/closing device 2 is configured to remove the bent portion 17 from a valve opening/closing device 1 for an engine. Therefore, one valve contact portion 14 , a connecting portion 19 , and the other one valve contact portion 14 are extended in flat between the two blocking protrusions 18 .
- valve opening/closing device 2 has simple composition and reduced cost to compare with a valve opening/closing device 1 of the present disclosure.
- valve opening/closing device 2 has profitableness by applying to an engine requiring small strength.
- the number of the cams and the rollers 20 which are required may be decreased and production cost may be reduced as two valves 30 are driven by rotation of one cam. Further, the number of the hydraulic lash adjusters 40 which are required may be decreased and it may become simple that hydraulic pressure is supplied to the hydraulic lash adjuster 40 . Furthermore, weight of an engine may become small and fuel consumption may be improved as the number of the cam, the roller 20 , and the valve gap control device 40 are decreased.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
Abstract
The present disclosure provides a valve opening/closing device for an engine which opens/closes two valves by rotation of one cam. In particular, the valve opening/closing device may make a lever motion by rotation of a cam so as to open/close valves. The valve opening/closing device may include: a body portion adapted to which a valve gap control device is mounted and an axis of a lever motion is positioned; an extended portion extended from the body portion toward the valve; and two valve contact portions respectively protruded to both sides from the extended portion so as to function to push the two valves.
Description
- This application claims the benefit of Korean Patent Application No. 10-2015-0099201, filed on Jul. 13, 2015, which is incorporated herein by reference in its entirety.
- The present disclosure relates to a valve opening/closing device for an engine, and more particularly, to a three-point supported valve opening/closing device.
- The statements in this section merely provide background information related to the present disclosure and may not constitute prior art.
- Generally, a valve opening/closing device is a device which makes a lever motion by rotation of a cam to open or close an intake valve or an exhaust valve by the lever motion.
- A hydraulic lash adjuster (HLA) may be coupled to the valve opening/closing device. The hydraulic lash adjuster is a device for making a valve lifter to move in close contact with the cam, and is also called “valve gap control device”.
- In case that intake valves or exhaust valves are disposed at one cylinder by two, one valve opening/closing device, one hydraulic lash adjuster, and one cam may be required for each intake valve or each exhaust valve.
- However, the cost of an engine may be increased and it may be complex to supply hydraulic pressure to the hydraulic lash adjuster if one intake valve or one exhaust valve requires one valve opening/closing device, one hydraulic lash adjuster, and one cam.
- The above information disclosed in this Background section is only for enhancement of understanding of the present disclosure and it may contain information that is not already known to a person of ordinary skill in the art.
- The present disclosure provides a valve opening/closing device for an engine having advantages of opening/closing two valves by rotation of one cam.
- In addition, the present disclosure provides a valve opening/closing device for an engine having further advantages of applying one hydraulic lash adjuster and easily supplying hydraulic pressure.
- A valve opening/closing device for an engine according to an embodiment of the present disclosure may make a lever motion by rotation of a cam so as to open or close valves. The valve opening/closing device may include: a body portion to which a valve gap control device is mounted and an axis of a lever motion is positioned; an extended portion extended from the body portion toward the valve; and two valve contact portions respectively protruded to both sides from the extended portion so as to function to push the two valves.
- The valve opening/closing device for an engine may be supported on three points by one valve gap control device and two valves.
- The valve opening/closing device for an engine may further include a connecting portion formed to connect the two valve contact portions with each other.
- Both ends of the connecting portion may be bent toward an upper direction so as to be connected with the valve contact portions.
- The two valve contact portions and the connecting portion are formed in flat.
- The valve opening/closing device for an engine may further include blocking protrusions protruded toward each lower direction from the valve contact portions which are respectively protruded to the both sides.
- Further areas of applicability will become apparent from the description provided herein. It should be understood that the description and specific examples are intended for purposes of illustration only and are not intended to limit the scope of the present disclosure.
- In order that the disclosure may be well understood, there will now be described various forms thereof, given by way of example, reference being made to the accompanying drawings, in which:
-
FIG. 1 is a perspective view showing a state that a valve opening/closing device is connected with a valve and a valve gap control device for an engine according to the present disclosure; -
FIG. 2 is a perspective view of a valve opening/closing device for an engine; and -
FIG. 3 is a perspective view of a valve opening/closing device for an engine according to another embodiment of the present disclosure. - The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way.
-
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- 1, 2: valve opening/closing device
- 10: body portion
- 12: extended portion
- 14: valve contact portion
- 15: seating portion
- 16, 19: connecting portion
- 17: bent portion
- 18: blocking protrusion
- 20: roller
- 25: roller pivot shaft
- 30: valve
- 40: valve gap control device
- The following description is merely exemplary in nature and is not intended to limit the present disclosure, application, or uses. It should be understood that throughout the drawings, corresponding reference numerals indicate like or corresponding parts and features.
-
FIG. 1 is a perspective view showing a state that a valve opening/closing device connected with a valve and a valve gap control device for an engine according to an embodiment of the present disclosure, andFIG. 2 is a perspective view of a valve opening/closing device for an engine according to an embodiment of the present disclosure. - As shown in
FIG. 1 , a valve opening/closing device 1 for an engine according to an embodiment of the present disclosure is a three-point supported valve opening/closing device 1 that is supported on twovalves 30 and one valvegap control device 40. Herein, thevalve 30 is an intake valve or an exhaust valve of an engine, and the valvegap control device 40 may be a general hydraulic lash adjuster (HLA) as a device for making the valve opening/closing device 1 move in close contact with a cam (not shown). - As shown in
FIG. 1 toFIG. 2 , a valve opening/closing device 1 for an engine includes abody portion 10, an extendedportion 12, avalve contact portion 14, a connectingportion 16, abent portion 17, ablocking protrusion 18, and aroller 20. - The
body portion 10 is a body of the valve opening/closing device 1 that an axis of a lever motion of the valve opening/closing device 1 is positioned thereto. In addition, the valvegap control device 40 is coupled to a lower side of thebody portion 10. Further, aseating portion 15 is formed at thebody portion 10 such that the valvegap control device 40 is seated thereon. - The extended
portion 12 is formed to be extended toward thevalve 30 from thebody portion 10. - The
valve contact portion 14 is formed at an end of the extendedportion 12 which is extended from thebody portion 10. In addition, thevalve contact portion 14 is a part which pushes thevalve 30 to be opened in accordance with a lever motion of the valve opening/closing device 1. Further, thevalve contact portions 14 are respectively protruded to both sides from the end of the extendedportion 12 so as to function to respectively push twovalves 30. That is, the twovalve contact portions 14 are formed. - The connecting
portion 16 is formed on the end of the extendedportion 12 so as to connect the twovalve contact portions 14 with each other. As the connectingportion 16 is formed, it can be prevented that the extendedportion 12 and thevalve contact portion 14 are twisted or the twovalve contact portions 14 are estranged from each other. - The
bent portion 17 is bent toward an upper direction from both ends of the connectingportion 16 so as to be connected with thevalve contact portion 14. As thebent portion 17 is formed, strength of the connectingportion 16 and thevalve contact portion 14 can be improved. - The blocking
protrusion 18 is protruded toward each lower direction from each end of thevalve contact portions 14 protruded to the both sides. That is, thevalve 30 is connected with thevalve contact portion 14 between thebent portion 17 and theblocking protrusion 18. In addition, thebent portion 17 and theblocking protrusion 18 prevents that the valve opening/closing device 1 escapes from thevalve 30 and suppresses movement of the valve opening/closing device 1. - The
roller 20 is provided at theextended portion 12 so as to get a rolling-contact to the cam. In addition, theroller 20 is rotatably coupled with theextended portion 12 by aroller pivot shaft 25. Herein, a part that the valve opening/closing device 1 is contacted to the cam by the valvegap control device 40 is a contact point between theroller 20 and the cam. Meanwhile, theroller 20 may be substituted to a sliding pad which is integrally formed with theextended portion 12. - In this specification, up and down directions to separate an upper side and a lower side are determined with respect to directions that the cam is disposed at an upper side of the valve opening/
closing device 1 and thevalve 30 is disposed at a lower side of the valve opening/closing device 1. - Meanwhile, height difference between the
valves 30 may be compensated by a design that a ramp height of the cam is increased when height of contact points, that the twovalves 30 are contacted to the eachvalve contact portion 14, are different. The compensation about height difference betweenvalves 30 can be realized as a shim is interposed between thevalve 30 and thevalve contact portion 14 depending on a design. - Referring to
FIG. 3 , a valve opening/closing device for an engine according to another embodiment of the present disclosure will be described. In the description below, repeated descriptions regarding the constituent elements to same with a valve opening/closing device 1 for an engine that described referring toFIG. 1 toFIG. 2 will be omitted. - As shown in
FIG. 3 , a valve opening/closing device 2 is configured to remove thebent portion 17 from a valve opening/closing device 1 for an engine. Therefore, onevalve contact portion 14, a connectingportion 19, and the other onevalve contact portion 14 are extended in flat between the two blockingprotrusions 18. - The structure of a valve opening/
closing device 2 has simple composition and reduced cost to compare with a valve opening/closing device 1 of the present disclosure. In addition, the valve opening/closing device 2 has profitableness by applying to an engine requiring small strength. - The number of the cams and the
rollers 20 which are required may be decreased and production cost may be reduced as twovalves 30 are driven by rotation of one cam. Further, the number of the hydraulic lashadjusters 40 which are required may be decreased and it may become simple that hydraulic pressure is supplied to thehydraulic lash adjuster 40. Furthermore, weight of an engine may become small and fuel consumption may be improved as the number of the cam, theroller 20, and the valvegap control device 40 are decreased. - While this present disclosure has been described in connection with what is presently considered to be practical embodiments, it is to be understood that the present disclosure is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.
Claims (6)
1. A valve opening/closing device of an engine configured to open and close valves by a cam, the valve opening/closing device comprising:
a body portion to which a valve gap control device is mounted and an axis of a lever motion is positioned;
an extended portion extended from the body portion toward the valves; and
at least two valve contact portions respectively protruded to both sides from the extended portion so as to function to push the at least two valves, respectively.
2. The valve opening/closing device of claim 1 , wherein the valve opening/closing device is supported on three points by one valve gap control device and two valves.
3. The valve opening/closing device of claim 1 , further comprising a connecting portion formed to connect the at least two valve contact portions with each other.
4. The valve opening/closing device of claim 3 , wherein both ends of the connecting portion are bent toward an upper direction so as to be connected with the at least two valve contact portions.
5. The valve opening/closing device of claim 3 , wherein the at least two valve contact portions and the connecting portion are formed in flat.
6. The valve opening/closing device of claim 1 , further comprising blocking protrusions protruded toward a lower direction from the at least two valve contact portions which are respectively protruded to the both sides.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR10-2015-0099201 | 2015-07-13 | ||
KR20150099201 | 2015-07-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
US20170016357A1 true US20170016357A1 (en) | 2017-01-19 |
Family
ID=57775166
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US14/949,178 Abandoned US20170016357A1 (en) | 2015-07-13 | 2015-11-23 | Valve opening/closing device for engine |
Country Status (1)
Country | Link |
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US (1) | US20170016357A1 (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20100307437A1 (en) * | 2009-06-05 | 2010-12-09 | Schaeffler Technologies Gmbh & Co. Kg | Rocker arm for a valve train of an internal combustion engine |
KR20110127944A (en) * | 2010-05-20 | 2011-11-28 | 주식회사 케이보배 | A compulsory open-close device for intake/exhaust valve of engine |
-
2015
- 2015-11-23 US US14/949,178 patent/US20170016357A1/en not_active Abandoned
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20100307437A1 (en) * | 2009-06-05 | 2010-12-09 | Schaeffler Technologies Gmbh & Co. Kg | Rocker arm for a valve train of an internal combustion engine |
KR20110127944A (en) * | 2010-05-20 | 2011-11-28 | 주식회사 케이보배 | A compulsory open-close device for intake/exhaust valve of engine |
Non-Patent Citations (2)
Title |
---|
English Machine Translation of JP 2001-355413 A translated from Espacenet on March 3, 2017. * |
English Machine Translation of KR 2011-012794 A translated from Espacenet on March 3, 2017. * |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: HYUNDAI MOTOR COMPANY, KOREA, REPUBLIC OF Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:CHOI, MYUNGSIK;REEL/FRAME:038328/0652 Effective date: 20151119 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |