Tappet with hydraulic valve clearance compensation and floating

Details Tappet with hydraulic valve clearance compensation and floating Tappet with hydraulic valve clearance compensation and floating

1994-07-15

1995-04-25

Miller, Carl S.

Internal-combustion engines

Poppet valve operating mechanism

Tappet

74569, F01L 124

Patent

active

054089590

ABSTRACT:
A tappet (2) has a hydraulic clearance compensating element (8) composed of a high pressure chamber (18), a housing (3) with a spring-loaded, longitudinally movable compensating piston (15) and a free piston (11) with a smaller diameter than the compensating piston (15). In order to obtain by simple manufacturing means a reduced elasticity in valve operation during the base circle phase of a cam (6), the ratio between the projected surface (20) of the compensating piston (15) that faces the high pressure chamber (18) and the projected surface (19) of the free piston (11) that faces the high pressure chamber (18) is higher than 3.

REFERENCES:
patent: 4164917 (1979-08-01), Glasson
patent: 4867113 (1989-09-01), Pieprzak et al.

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