Means for variable valve timing for engine

Details Means for variable valve timing for engine Means for variable valve timing for engine

1987-05-06

1988-02-23

Lazarus, Ira S.

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

123 9031, F01L 134

Patent

active

047263318

ABSTRACT:
Several embodiments of variable valve timing arrangements for double overhead camshaft engines having cylinder banks disposed at an angle to each other. In each embodiment, the variable timing is achieved by means of a pair of idler sprockets that are disposed between the camshafts of the respective cylinder banks and which are operated in unison so as to rotate the camshafts in an appropriate direction to achieve simultaneous valve timing adjustment of all camshafts in the desired relationship. In addition, an improved arrangement is disclosed for driving the camshafts of one cylinder bank from those of another cylinder bank.

REFERENCES:
patent: 2010056 (1935-08-01), Brush
patent: 3441009 (1969-04-01), Rafanelli
patent: 3496918 (1970-02-01), Finlay
patent: 3888217 (1975-06-01), Hisserich
patent: 4576127 (1986-03-01), Doi et al.
patent: 4685429 (1987-08-01), Oyaizu

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