Automatic compression releasing device for four-cycle engine

Details Automatic compression releasing device for four-cycle engine Automatic compression releasing device for four-cycle engine

1985-12-20

1987-03-24

Dolinar, Andrew M.

Internal-combustion engines

Starting device

Compression relieving type

123 9016, F01L 1308

Patent

active

046516875

ABSTRACT:
An automatic compression releasing device intended for reducing the pressure inside the combustion chamber of the four cycle engine at the start by opening and closing the intake or exhaust valve of the combustion chamber actuated by the cam on the cam shaft through the tappet. A single moving piece mounted, on the side of the gear integrated with the cam shaft, as enclosing the cam shaft, can slide over the side of the gear in a given direction, guided by two slots opened in the moving piece and two pins planted on the gear side. A tappet lifting arm is extended from the moving piece to such a position as to push up the tappet. At the start, the centrifugal force on the moving piece is designed not to exceed the opposing force, thus keeping the tappet lifting arm projected out of the cam base circle, and also retaining the returning force of the moving piece acting on the tappet lifting arm through the tappet being supported by the guide slots and pins. During the normal rpm, the centrifugal force on the moving piece overcomes aforesaid opposing force to slide the moving piece along said guide slots, bringing the tappet lifting arm level with or further down into the cam base circle.

REFERENCES:
patent: 3362390 (1968-01-01), Esty
patent: 3381676 (1968-05-01), Campen
patent: 3897768 (1975-08-01), Thiel

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