Valve train in internal combustion engine

Details Valve train in internal combustion engine Valve train in internal combustion engine

1997-12-18

1999-05-04

Lo, Weilun

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

123 9031, 123 906, 123508, F01L 104, F02M 5902

Patent

active

058991816

ABSTRACT:
A valve train for driving an engine valve in an internal combustion engine. A pump having a pressure chamber compresses and supplies fuel to the engine. An intake camshaft has valve cams for selectively opening and closing the intake valves and a pump cam for driving the pump. The intake camshaft has a torque fluctuation as a result of driving the intake valves and as a result of compressing fuel by the pump. A timing belt connects a crankshaft to the intake camshaft. The pump cam has a phase with respect to the intake camshaft to reduce a composite of the torque fluctuation (the net torque fluctuation) generated in the intake camshaft by the intake valves and the pump. This improves the life of the timing belt.

REFERENCES:
patent: 4942854 (1990-07-01), Shirai et al.
patent: 5040500 (1991-08-01), Reece
patent: 5107805 (1992-04-01), Butterfield et al.
patent: 5603303 (1997-02-01), Okajima et al.
patent: 5605077 (1997-02-01), Tsunoda et al.

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