Valve operating system in internal combustion engine

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

1992-09-02

1993-05-04

Cross, E. Rollins

Internal-combustion engines

Poppet valve operating mechanism

Overhead camshaft

123 9016, 123308, 123432, F01L 104, F01L 134

Patent

active

052071936

ABSTRACT:
A valve operating system in an overhead cam type multicylinder internal combustion engine having three intake-side rocker arms disposed to operate a pair of intake valves and two exhaust-side rocker arms disposed to operate a pair of exhaust valves. The intake-side rocker arms are provided with a connection switchover mechanism capable of switching-over the connection and disconnection of the adjacent in take-side rocker arms. Exhaust-side cams are provided on a cam shaft on opposite sides of intake-side cams which are provided adjacent one another. Two of the intake-side rocker arms and both of the exhaust-side rocker arms are in rolling contact with the corresponding cams through rollers mounted on the rocker arms. The exhaust-side a rocker arms are provided with notches in the area near the cam shaft for accommodating portions of the intake-side rocker arms, respectively. Thus, it is possible to reduce the loss of valve operational friction to the utmost, to position the rocker arms in an axially compact arrangement and to position the intake valves and exhaust valves at a small angle.

REFERENCES:
patent: 4662323 (1987-05-01), Moriya
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patent: 4844022 (1989-07-01), Konno
patent: 4995352 (1991-02-01), Machino
patent: 5060605 (1991-10-01), Yamazaki
patent: 5095859 (1992-03-01), Iwata et al.
patent: 5101778 (1992-04-01), Fukuo et al.
patent: 5127380 (1992-07-01), Morishita

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