Variable camshaft timing for internal combustion engine

Details Variable camshaft timing for internal combustion engine Variable camshaft timing for internal combustion engine

1990-09-19

1991-09-10

Okonsky, David A.

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

123 9017, 123 9031, F01L 134

Patent

active

050464604

ABSTRACT:
A variable camshaft timing arrangement for an internal combustion engine in hich a camshaft, for example, an intake valve operating camshaft in a dual camshaft engine, is advanced or retarded in its position relative to the crankshaft and to the exhaust valve operating camshaft in reaction to torque pulsations in such intake valve operating camshaft. In an engine having cam followers of the friction type, the unidirectionally acting torque on the camshaft which results from the friction between the camshaft and the followers can be offset by providing resilient means to act on one of the opposed cylinders to introduce a countertorque into the camshaft which is oppositely directed to the frictional torque.

REFERENCES:
patent: 2861557 (1958-11-01), Stolte
patent: 3721220 (1973-03-01), Garcea
patent: 4895113 (1990-01-01), Speier et al.

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