US 5,343,833 AGranted

Valve gear device for internal combustion engines

AssigneeAisin Seiki Kabushiki Kaisha

InventorEiji Shirai

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Abstract

A valve gear device for internal combustion engines comprises a suction and exhaust valve which is driven to be opened or closed by a high-speed cam or low-speed cams through a lifter wherein a guide plate is formed on the cam shaft and a guide groove which constantly engages with the guide plate is formed on the top portion of the body of the lifter. Also, the high-speed cam itself may function as the guide plate. The contacting surface of the high speed cam and the low speed cams can be surely regulated by the guide groove which constantly engages with the guide plate. Accordingly, the present invention can provide a small-sized valve gear device which surely regulates the contacting surface of the high-speed cam and the low-speed cams with the lifter.

Claims2

Dependent claims

A valve gear device for an internal combustion engine comprises:

a high-speed cam and low-speed cams which are fixed to a cam shaft, being adjacent to each other;
and
at least one of an intake and exhaust valve which is driven by at least one of said high-speed cam and low-speed cams through a lifter;
wherein said lifter comprises:
a body which slides inside of a lifter hole formed at a cylinder head of the engine;
a slider which slides inside a slider hole formed in said body and which engages with said high-speed cam;
a spring which urges said slider toward said high-speed cam;
a pin which is supported inside of said body and which is capable to control the relative movement between said body and said slider;
and
a guide groove which is formed on a top portion of said body and which constantly engages with a guide plate fixed to said cam shaft.

7 more elements

Dependencies are inferred from the claim text.