Apparatus for detecting valve lifting characteristic of cam shaf

Details Apparatus for detecting valve lifting characteristic of cam shaf Apparatus for detecting valve lifting characteristic of cam shaf

1996-03-26

1997-06-10

Lo, Weilun

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

123 9031, F01L 1300

Patent

active

056366035

ABSTRACT:
In an apparatus for detecting a valve lifting characteristic of a cam shaft assembly for use in a multi-cylinder internal combustion engine with a cylinder head to control opening and closure of cylinder valves, a sensor which is so arranged and constructed as to detect the valve lifting characteristic of the cam shaft assembly is disposed on an end of at least one of either a first eccentric control cam or a second eccentric control cam, both of the first and second eccentric cams being rotatably coupled with an intermediate member supported by a support so as to vary an eccentricity of the intermediate member to a shaft axis of a driven shaft according to a rotation position of the first eccentric control cam, the first and second eccentric control cam, the intermediate member, the support, and the driven shaft constituting the cam shaft assembly. In an embodiment, a potentiometer is attached onto an end of a control rod integrally formed with the first eccentric control cam, the other end of the control rod being attached with a hydraulic actuator to rotate the control rod according to an engine driving condition.

REFERENCES:
patent: 5271360 (1993-12-01), Kano et al.
patent: 5333579 (1994-08-01), Hara et al.
patent: 5363817 (1994-11-01), Ikeda et al.
patent: 5365896 (1994-11-01), Hara et al.
patent: 5494009 (1996-02-01), Yamada et al.
patent: 5501186 (1996-03-01), Hara et al.
patent: 5553573 (1996-09-01), Hara et al.

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