GB2006373A - I. C. Engine Valve Clearance Regulating Means - Google Patents
I. C. Engine Valve Clearance Regulating MeansInfo
- Publication number
- GB2006373A GB2006373A GB7839981A GB7839981A GB2006373A GB 2006373 A GB2006373 A GB 2006373A GB 7839981 A GB7839981 A GB 7839981A GB 7839981 A GB7839981 A GB 7839981A GB 2006373 A GB2006373 A GB 2006373A
- Authority
- GB
- United Kingdom
- Prior art keywords
- valve
- housing
- chamber
- valve clearance
- tappet
- 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- Withdrawn
Links
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
- F01L1/20—Adjusting or compensating clearance
- F01L1/22—Adjusting or compensating clearance automatically, e.g. mechanically
- F01L1/24—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically
- F01L1/2405—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically by means of a hydraulic adjusting device located between the cylinder head and rocker arm
-
- 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
- F01L1/20—Adjusting or compensating clearance
- F01L1/22—Adjusting or compensating clearance automatically, e.g. mechanically
- F01L1/24—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically
- F01L1/245—Hydraulic tappets
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
- Lubrication Of Internal Combustion Engines (AREA)
Abstract
A hydraulic valve tappet (100) comprises a tubular housing (112), and a piston (113) abutting a socket (114) and both slidable in the housing. A pressure chamber (126) below the piston crown (113A) is controlled by a non-return ball valve (116, 115A). Pressure oil from the engine lubrication system is admitted into the housing and can enter the chamber through the valve and be trapped therein to maintain normal valve clearance. A sliding plunger (133) is spring-biassed towards the piston crown and engages the ball (116) to open the valve and vent the chamber (126) when the oil pressure in the housing is below a threshold value, thus collapsing the tappet and increasing the valve clearance above the normal running value. When the oil pressure in the housing exceeds the threshold value it overcomes the plunger spring and lifts the plunger, allowing the valve to close and trap oil in the chamber, so reestablishing the normal valve clearance. Thus for starting up, the tappet provides increased valve clearance so long as the oil pressure is low, thereby facilitating starting by shortening the valve opening period. <IMAGE>
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB7839981A GB2006373A (en) | 1977-10-10 | 1978-10-10 | I. C. Engine Valve Clearance Regulating Means |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3977078 | 1977-10-10 | ||
GB7839981A GB2006373A (en) | 1977-10-10 | 1978-10-10 | I. C. Engine Valve Clearance Regulating Means |
Publications (1)
Publication Number | Publication Date |
---|---|
GB2006373A true GB2006373A (en) | 1979-05-02 |
Family
ID=26264218
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB7839981A Withdrawn GB2006373A (en) | 1977-10-10 | 1978-10-10 | I. C. Engine Valve Clearance Regulating Means |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB2006373A (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2185549A (en) * | 1985-10-15 | 1987-07-22 | Honda Motor Co Ltd | Hydraulic lash adjuster for use in a valve operating mechanism |
EP0324085A1 (en) * | 1988-01-15 | 1989-07-19 | Daimler-Benz Aktiengesellschaft | Hydraulic lash adjuster |
EP0497194A1 (en) * | 1991-01-29 | 1992-08-05 | MAN Nutzfahrzeuge Aktiengesellschaft | Method for actuating an exhaust valve tappet during braking of an internal combustion engine |
US5163389A (en) * | 1991-03-28 | 1992-11-17 | Aisin Seiki Kabushiki Kaisha | Hydraulic valve lifter having function to stop valve drive |
WO1999056006A1 (en) * | 1998-04-23 | 1999-11-04 | INA Wälzlager Schaeffler oHG | Valve gear of an internal combustion engine |
EP1568852A1 (en) * | 2004-02-26 | 2005-08-31 | Eaton Corporation | Hydraulic lash adjuster and its method of assembly |
CN111894694A (en) * | 2020-06-29 | 2020-11-06 | 东风商用车有限公司 | Lift-controllable hydraulic tappet system |
WO2021134484A1 (en) * | 2019-12-31 | 2021-07-08 | 舍弗勒技术股份两合公司 | Hydraulic lash adjuster for valve mechanism |
US12049835B2 (en) | 2021-05-13 | 2024-07-30 | Eaton Intelligent Power Limited | Lash adjuster with hydraulic lash assembly and mechanical lash assembly |
-
1978
- 1978-10-10 GB GB7839981A patent/GB2006373A/en not_active Withdrawn
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2185549A (en) * | 1985-10-15 | 1987-07-22 | Honda Motor Co Ltd | Hydraulic lash adjuster for use in a valve operating mechanism |
GB2185549B (en) * | 1985-10-15 | 1990-01-24 | Honda Motor Co Ltd | Hydraulic lash adjuster for use in a valve operating mechanism |
EP0324085A1 (en) * | 1988-01-15 | 1989-07-19 | Daimler-Benz Aktiengesellschaft | Hydraulic lash adjuster |
EP0497194A1 (en) * | 1991-01-29 | 1992-08-05 | MAN Nutzfahrzeuge Aktiengesellschaft | Method for actuating an exhaust valve tappet during braking of an internal combustion engine |
US5163389A (en) * | 1991-03-28 | 1992-11-17 | Aisin Seiki Kabushiki Kaisha | Hydraulic valve lifter having function to stop valve drive |
WO1999056006A1 (en) * | 1998-04-23 | 1999-11-04 | INA Wälzlager Schaeffler oHG | Valve gear of an internal combustion engine |
US6318322B1 (en) | 1998-04-23 | 2001-11-20 | Ina Walzlager Schaeffler Ohg | Valve drive of an internal combustion engine |
EP1568852A1 (en) * | 2004-02-26 | 2005-08-31 | Eaton Corporation | Hydraulic lash adjuster and its method of assembly |
WO2021134484A1 (en) * | 2019-12-31 | 2021-07-08 | 舍弗勒技术股份两合公司 | Hydraulic lash adjuster for valve mechanism |
CN111894694A (en) * | 2020-06-29 | 2020-11-06 | 东风商用车有限公司 | Lift-controllable hydraulic tappet system |
US12049835B2 (en) | 2021-05-13 | 2024-07-30 | Eaton Intelligent Power Limited | Lash adjuster with hydraulic lash assembly and mechanical lash assembly |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |