JPS54121316A - Valve lift varying mechanism for internal combustion engine - Google Patents
Valve lift varying mechanism for internal combustion engineInfo
- Publication number
- JPS54121316A JPS54121316A JP2824778A JP2824778A JPS54121316A JP S54121316 A JPS54121316 A JP S54121316A JP 2824778 A JP2824778 A JP 2824778A JP 2824778 A JP2824778 A JP 2824778A JP S54121316 A JPS54121316 A JP S54121316A
- Authority
- JP
- Japan
- Prior art keywords
- spring
- pressure chamber
- varying mechanism
- valve lift
- valve
- 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.)
- Pending
Links
Landscapes
- Valve-Gear Or Valve Arrangements (AREA)
- Valve Device For Special Equipments (AREA)
Abstract
PURPOSE: To raise the natural frequency of a valve lift varying mechanism employing a hydraulic tappet and prevent noises, by providing in an oil pressure chamber a spring for applying a force to a check valve to reduce the volume of a pressure chamber.
CONSTITUTION: The vibration of a spring system is generally represented as f= {(K1+K2).g/w}1/2/2π where K1 and K2 denote spring constants. Therefore, f is increased by raising K2 if K1 and w are constant. The check valve 57 having a conical face is thrusted upward by the tension spring 59 provided in the oil chamber 53b so that the conical face is fitted on a valve seat. Because the spring 59 is placed in the oil chamber 53b, the volume of the pressure chamber 51b is thoroughly reduced. Thus, the natural frequency of the vibration system including the hydraulic tappet and an intake valve is increased and noises are prevented.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2824778A JPS54121316A (en) | 1978-03-14 | 1978-03-14 | Valve lift varying mechanism for internal combustion engine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2824778A JPS54121316A (en) | 1978-03-14 | 1978-03-14 | Valve lift varying mechanism for internal combustion engine |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54121316A true JPS54121316A (en) | 1979-09-20 |
Family
ID=12243242
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2824778A Pending JPS54121316A (en) | 1978-03-14 | 1978-03-14 | Valve lift varying mechanism for internal combustion engine |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54121316A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60111009A (en) * | 1983-11-21 | 1985-06-17 | Matsuaki Kudou | Variable valve timing device of internal-combustion engine |
US4554895A (en) * | 1983-02-17 | 1985-11-26 | Aisin Seiki Kabushiki Kaisha | Hydraulic lifter for internal combustion engines |
-
1978
- 1978-03-14 JP JP2824778A patent/JPS54121316A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4554895A (en) * | 1983-02-17 | 1985-11-26 | Aisin Seiki Kabushiki Kaisha | Hydraulic lifter for internal combustion engines |
JPS60111009A (en) * | 1983-11-21 | 1985-06-17 | Matsuaki Kudou | Variable valve timing device of internal-combustion engine |
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