GB2006373A - I. C. Engine Valve Clearance Regulating Means - Google Patents

I. C. Engine Valve Clearance Regulating Means

Info

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Withdrawn
Application number
GB7839981A
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.)
Ricardo PLC
Original Assignee
Ricardo and Co Engineers 1927 Ltd
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 Ricardo and Co Engineers 1927 Ltd filed Critical Ricardo and Co Engineers 1927 Ltd
Priority to GB7839981A priority Critical patent/GB2006373A/en
Publication of GB2006373A publication Critical patent/GB2006373A/en
Withdrawn legal-status Critical Current

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>
GB7839981A 1977-10-10 1978-10-10 I. C. Engine Valve Clearance Regulating Means Withdrawn GB2006373A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (11)

* Cited by examiner, † Cited by third party
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)