Biasing assembly for a variable valve timing mechanism

Details Biasing assembly for a variable valve timing mechanism Biasing assembly for a variable valve timing mechanism

1994-11-04

1996-05-14

Lo, Weilun

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

123 9044, 123 9065, F01L 134, F01L 310

Patent

active

055158196

ABSTRACT:
A biasing device for a free rocker arm in an engine valve actuating system wherein driven rocker arms are selectively engaged with the free rocker arm to provide variable valve operating characteristics. The biasing device includes interfitting, cold-formed cup-shaped members within which a compression spring is received in interference fit at one end with the body and at the other end with the plunger. In a preferred embodiment, at least two coils of the spring are in interference fit with the body to provide spring damping.

REFERENCES:
patent: 4787346 (1988-11-01), Ajiki et al.
patent: 4883027 (1989-11-01), Okawa et al.
patent: 4905639 (1990-03-01), Konno
patent: 5320082 (1994-06-01), Murata et al.
patent: 5367991 (1994-11-01), Asai et al.

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