Internal-combustion engines – Poppet valve operating mechanism – Spring
Patent
1987-10-05
1988-10-18
Wolfe, Willis R.
Internal-combustion engines
Poppet valve operating mechanism
Spring
123188SC, F01L 310
Patent
active
047779160
ABSTRACT:
The invention relates to a valve spring device for a valve in an internal combustion engine. The valve has a valve disc (4) cooperating with a valve seat (5) to control the flow in an engine duct (3), and a valve spindle (6) extending from the valve disc (4). The valve spring device comprises at least one spring (10,11) which is arranged to act between an abutment surface (12) of the engine and an actuating device (8) joined to the valve spindle (6) to bias the valve disc (4) towards the valve seat (5). According to the invention the spring (10,11) consists of a relatively weak helical compression spring. The actuating device (8) is arranged around the valve spindle (6) and is axially displaceable and sealingly guided to form a chamber (15), which at one end is limited by the abutment surface (12) and at the other end is limited by the actuating device (8). The chamber (15) is in communication (24- 27) with the engine duct (3) in which the valve (4,6) is arranged to control the flow.
REFERENCES:
patent: 1331826 (1920-02-01), Shepherd
patent: 2595775 (1952-05-01), Wrangell
patent: 3094976 (1963-06-01), May
patent: 3301239 (1967-01-01), Thauer
patent: 4602598 (1986-07-01), Moore
AB Volvo
Wolfe Willis R.
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