GB832125A - Improvements in hydraulic mechanisms for taking-up clearance in the valve gear of aninternal combustion engine - Google Patents

Improvements in hydraulic mechanisms for taking-up clearance in the valve gear of aninternal combustion engine

Info

Publication number
GB832125A
GB832125A GB37920/57A GB3792057A GB832125A GB 832125 A GB832125 A GB 832125A GB 37920/57 A GB37920/57 A GB 37920/57A GB 3792057 A GB3792057 A GB 3792057A GB 832125 A GB832125 A GB 832125A
Authority
GB
United Kingdom
Prior art keywords
space
valve
pressure
piston
clearance
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.)
Expired
Application number
GB37920/57A
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.)
Anciens Etablissements Panhard et Levassor SA
Panhard et Levassor
Original Assignee
Anciens Etablissements Panhard et Levassor SA
Panhard et Levassor
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 Anciens Etablissements Panhard et Levassor SA, Panhard et Levassor filed Critical Anciens Etablissements Panhard et Levassor SA
Publication of GB832125A publication Critical patent/GB832125A/en
Expired 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
    • 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
    • F01L1/182—Centre pivot rocking arms the rocking arm being pivoted about an individual fulcrum, i.e. not about a common shaft
    • F01L1/183—Centre pivot rocking arms the rocking arm being pivoted about an individual fulcrum, i.e. not about a common shaft of the boat type
    • 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
    • F01L1/12—Transmitting gear between valve drive and valve
    • F01L1/14—Tappets; Push rods
    • F01L1/146—Push-rods
    • 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
    • F01L2001/188—Fulcrums at upper surface

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)

Abstract

832,125. Valve gear. ANCIENS ETABLISSEMENTS PANHARD & LEVASSOR S. A., DES. Dec. 5, 1957 [Dec. 19, 1956], No. 37920/57. Class 7(6) A hydraulic clearance adjuster 11 comprises a piston 30, Fig. 2, with non-return valve 31 dividing a pressure chamber B from a supply chamber A, and elastic means acting upon a movable member 32 closing the'end of chamber B and creating a pressure which acts upon an effective area of the piston equal to that of the piston rod 30a to urge it in the direction to take up valve clearance. As shown, the valve rocker 1, Fig. 1, of an overhead valve engine is mounted on a movable fulcrum 4, which is adjusted to take up valve clearance by the hydraulic adjuster 11, The fulcrum 4 is slidably supported on a bolt 5 screwed to the cylinder head 6 and bears against a lever 7 pivoted at one end on an adjustable screw 9 and resting at the other end on the piston rod 30a, Fig. 2. The reservoir A is closed by a stationary sealed plug 27 and the space C is filled with nitrogen under pressure. The non-return valve 31 comprises a split ring, Fig. 2a, the split 31c in which permits a predetermined small leakage from the pressure space B to the supply space A when the lever 7 is under load during operation of the rocker. Upward movement of piston 30 is resisted by the pressure in space B, the non-return valve being closed, but if clearance develops in the valve gear piston 30 is forced down due to the differential action on the piston of the pressures in spaces B and A set up by the gas formed in space C. In a modification, the gas pressure in space C is replaced by a leaf spring and in Fig. 4 the pressure in space B is developed by a spring-loaded plunger 37 urged into space B.
GB37920/57A 1956-12-19 1957-12-05 Improvements in hydraulic mechanisms for taking-up clearance in the valve gear of aninternal combustion engine Expired GB832125A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR832125X 1956-12-19

Publications (1)

Publication Number Publication Date
GB832125A true GB832125A (en) 1960-04-06

Family

ID=9295812

Family Applications (1)

Application Number Title Priority Date Filing Date
GB37920/57A Expired GB832125A (en) 1956-12-19 1957-12-05 Improvements in hydraulic mechanisms for taking-up clearance in the valve gear of aninternal combustion engine

Country Status (1)

Country Link
GB (1) GB832125A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1229334B (en) * 1960-12-07 1966-11-24 Ford Werke Ag Rocker arm arrangement for the valve control of internal combustion engines

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1229334B (en) * 1960-12-07 1966-11-24 Ford Werke Ag Rocker arm arrangement for the valve control of internal combustion engines

Similar Documents

Publication Publication Date Title
SE7513930L (en) ADJUSTABLE PILLARS.
FR1587528A (en)
GB726505A (en) Improvements in valve control mechanism, particularly for internal combustion engines
GB596759A (en) Shock absorbers
GB1424556A (en) Device for adjusting and maintaining valve play in internal combustion engines
GB832125A (en) Improvements in hydraulic mechanisms for taking-up clearance in the valve gear of aninternal combustion engine
GB1308814A (en) Valve gear assembly with valve clearance adjustment for example for internal combustion engines
GB1517842A (en) Engine decompressing device
GB1017793A (en) Hydraulic self-regulating valve tappet for piston engines
GB736431A (en) Improvements in or relating to vehicle shock absorbers
GB1380757A (en) Valve actuating device for an internal combustion engine
US2827887A (en) Hydraulic valve lifter
GB1104036A (en) Hydraulic tappet with metering
GB806824A (en) Improvements relating to liquid springs
US2862486A (en) Hydraulic clearance taking-up mechanism for valve gears
GB731863A (en) Gas-pressure relief valves
GB893092A (en) Improvements in or relating to rockers for the operation of valves in engines
GB978966A (en) Hydraulically retarded door closer
GB768336A (en) Improvements relating to devices for the automatic regulation of valve stroke in internal combustion engines
GB707720A (en) Improvements in apparatus for regulating the supply of fuel to internal combustion engines
GB809729A (en) Improvements relating to adjustment of valve clearance in internal combustion engines
FR2252022A5 (en) Shock absorber for IC engine valve tappet - has flanged spring loaded piston forcing engine oil through restriction
GB1254044A (en) Hydraulically self-adjusting play-compensating element
GB954216A (en) Improvements in or relating to hydraulically checked door closers
GB753092A (en) Improvements in or relating to motor vehicle shock absorbers