JPS54159521A - Hydraulic valve lift device - Google Patents
Hydraulic valve lift deviceInfo
- Publication number
- JPS54159521A JPS54159521A JP6807378A JP6807378A JPS54159521A JP S54159521 A JPS54159521 A JP S54159521A JP 6807378 A JP6807378 A JP 6807378A JP 6807378 A JP6807378 A JP 6807378A JP S54159521 A JPS54159521 A JP S54159521A
- Authority
- JP
- Japan
- Prior art keywords
- oil
- valve
- plunger
- chamber
- hole
- 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 prevent shocking brake force operated at a valve mechanism when an engine rotates at high speed by so forming the hydraulic pressure in a brake chamber of a valve lift device as to control the pressure less than set value by a relief valve.
CONSTITUTION: Before a cam shaft 1 rotated by an engine pushes up a lifter body 5, oil flown from an oil inlet 11 is flown through a supply groove 12 and oil feed hole 13 of a plunger 6 into an oil feed chamber 14 and through a variable throttle hole formed by a slit 15 and a flange 9 into a brake chamber 10. The oil also pushes down a ball 18 to thereby flow into the hydraulic oil chamber 26 through throttle hole 27, escape groove 28 and drain oil hole 29 out. When the plunger 6 is then lowered upon closure of the valve 25 after opening the valve 25 upon rotation of the cam shaft 1, the opening area of the slit 15 becomes small to thereby increase the reaction against the droppage of the plunger 6 so as to thereby reduce the impact upon closing of the valve 25.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6807378A JPS54159521A (en) | 1978-06-06 | 1978-06-06 | Hydraulic valve lift device |
US06/034,186 US4347812A (en) | 1978-04-28 | 1979-04-27 | Hydraulic valve lift device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6807378A JPS54159521A (en) | 1978-06-06 | 1978-06-06 | Hydraulic valve lift device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54159521A true JPS54159521A (en) | 1979-12-17 |
Family
ID=13363222
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6807378A Pending JPS54159521A (en) | 1978-04-28 | 1978-06-06 | Hydraulic valve lift device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54159521A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4407241A (en) * | 1980-12-31 | 1983-10-04 | Cummins Engine Company, Inc. | Expandable hydraulic tappet with a variable exit valve |
-
1978
- 1978-06-06 JP JP6807378A patent/JPS54159521A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4407241A (en) * | 1980-12-31 | 1983-10-04 | Cummins Engine Company, Inc. | Expandable hydraulic tappet with a variable exit valve |
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