Desmodromic valve system

Details Desmodromic valve system Desmodromic valve system

1986-12-04

1988-08-16

Wolfe, Jr., Willis R.

Internal-combustion engines

Poppet valve operating mechanism

Valve driven closed

123 9049, 123 9047, F01L 130

Patent

active

047636157

ABSTRACT:
The invention relates to a desmodromic system in which a valve stem is arranged to be acted upon directly, or by way of rockers, by an opening cam and a closing cam rotatable together at constant or varying angular velocity in synchronism with the rotation of the engine crankshaft, and in which a compliance device is incorporated in the transmission train from the cams to the valve stem, the compliance device comprising two cup-shaped members nested together with a limited relative movement between and resiliently urged away from one another, the compliance device operating to provide zero clearance when the valve is open and maximum clearance when closed to accommodate valve recession and thermal expansion.

REFERENCES:
patent: 2817326 (1957-12-01), Taylor
patent: 2831470 (1958-04-01), Lorscheidt
patent: 2954016 (1960-09-01), Leese
patent: 3430614 (1969-03-01), Meacham

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