Valve operating system for multi-valve engine

Details Valve operating system for multi-valve engine Valve operating system for multi-valve engine

1995-06-07

1997-03-04

Lo, Weilun

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

123 9017, 123 9027, 123 9028, 123 906, F01L 1300, F01L 112

Patent

active

056069421

ABSTRACT:
A number of embodiments of overhead cam internal combustion engines having multiple intake and exhaust valves. The valve actuating mechanism is such that the valves are opened at a non-symmetrical rate so as to minimize the clearance requirements at top dead center and also so as to minimize the overlap between the closing of the exhaust valve and the opening of the intake valve without decreasing volumetric efficiency. A number of embodiments having either direct or rocker arm actuation are disclosed.

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Patent Abstract of Japan, vol. 95, No. 0005, 16 May 1995 & JP-A-07 127403 (Einaga Hideo) 16 May 1995.

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