Camshaft phase changing device

Details Camshaft phase changing device Camshaft phase changing device

1995-03-17

1997-01-14

Lo, Weilun

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

123 9031, 74508R, 464 2, F01L 134

Patent

active

055929095

ABSTRACT:
A variable camshaft phase changing device has an annular piston and lash take up front and rear gears with inner and outer helical spline for phase changing and a return spring for the piston. The annular piston is maintained in drive relation with the front and rear gears in such a manner as to relieve lash take-up friction on the piston stroke against the return spring and on the piston return stroke.

REFERENCES:
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patent: 5033327 (1991-07-01), Lichti et al.
patent: 5088456 (1992-02-01), Suga
patent: 5119691 (1992-06-01), Lichti et al.
patent: 5163872 (1992-11-01), Niemiec et al.
patent: 5197421 (1993-03-01), Hara
patent: 5203290 (1993-04-01), Tsuruta et al.
patent: 5309873 (1994-05-01), Suga et al.

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