Valve operating system in internal combustion engine

Details Valve operating system in internal combustion engine Valve operating system in internal combustion engine

1997-08-28

1999-10-05

Lo, Weilun

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

123 9042, F01L 118, F01L 1300

Patent

active

059607548

ABSTRACT:
A valve operating system in an internal combustion engine including rollers which are in rolling contact with valve operating cams and rotatably supported by support shafts fixed to rocker arms in a manner such that the support shafts can be easily fixed to the rocker arms. In one embodiment, a rocker arm 25.sub.1 is provided with a fitting bore 37 in which a support shaft 34.sub.1 is fitted and with a press-fit bore 40 leading to an inner surface of the fitting bore 37. A locking groove 43 is provided in an outer surface of the support shaft 34.sub.1 in correspondence to an opening of the press-fit bore 40 into the inner surface of the fitting bore 37, and extends in a direction tangent to a phantom circle C.sub.1 about an axis of the support shaft 34.sub.1. A pin 46 is press-fitted into the press-fit bore 40 and engaged in the locking groove 43.

REFERENCES:
patent: 1984198 (1934-12-01), Notter
patent: 4848285 (1989-07-01), Konno
patent: 5388552 (1995-02-01), Sugimoto et al.
patent: 5460130 (1995-10-01), Fukuzawa et al.
patent: 5515820 (1996-05-01), Sugimoto et al.
patent: 5606939 (1997-03-01), Spath

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