Valve gear of internal combustion engine

Details Valve gear of internal combustion engine Valve gear of internal combustion engine

2005-02-15

2005-02-15

Denion, Thomas (Department: 3748)

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

C123S090480

Reexamination Certificate

active

06854432

ABSTRACT:
A valve operating system for an internal combustion engine including a main valve lifter, a subsidiary valve lifter, a low-speed cam operating the main valve lifter, a high-speed cam operating the subsidiary valve lifter, a connecting device switched over between a non-connecting state in which the valve lifters are disconnected from each other, and a connecting state in which the valve lifters are connected to each other, a valve spring for biasing the valve in a closing direction, a lifter spring for biasing the subsidiary valve lifter toward the cam; thus, in a low-speed mode, that is non-connected states, an influence of a load of the lifter spring on the valve can be prevented, and in a high-speed mode, that is connected states, a sum total of loads of the valve spring and the lifter spring cap be applied to both of the valve lifters to improve the closing responsiveness of the valve.

REFERENCES:
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patent: 5036807 (1991-08-01), Kaneko
patent: 5351662 (1994-10-01), Dopson et al.
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patent: 5960754 (1999-10-01), Sugimoto et al.
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patent: 9-184409 (1997-07-01), None
patent: 10-77813 (1998-03-01), None
patent: 11-62532 (1999-03-01), None

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