Mono-shaft four-stroke engine

Details Mono-shaft four-stroke engine Mono-shaft four-stroke engine

2006-02-21

2006-02-21

Denion, Thomas (Department: 3748)

Internal-combustion engines

Poppet valve operating mechanism

Valve driven closed

C123S090150, C123S090200, C123S090600

Reexamination Certificate

active

07000581

ABSTRACT:
A 4-stroke engine incorporating a mono-shaft multi-valve operating system, the multi-valve operating system incorporating a first cam follower assembly that is associated with an intake valve, a second cam follower assembly that is associated with an exhaust valve, and a cam follower channel assembly that is integrated into a crank web of the engine, the cam follower channel assembly including a base circle channel, a cam channel, and a cross-over channel. The cam follower channel assembly is configured to commonly interact with the two cam follower assemblies to operate the intake valve at a first instance, and the exhaust valve at a second instance, with both instances occurring while the crank web completes two rotations. When either of the two cam follower assemblies engages with a cam channel of the cam follower channel assembly, the cam follower channel assembly is configured to provide a camming operation to operate the respective valve. When either of the two cam follower engages a base circle channel of the cam follower channel assembly, the cam follower channel assembly is configured to prevent operation of the respective valve.

REFERENCES:
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patent: 5347967 (1994-09-01), Todero et al.
patent: 5582145 (1996-12-01), Aizawa et al.
Naoki Okanishi et al. ‘Torque boosting of 4-stroke Cycle Spark-Ignition Engines by Crankcase-Supercharging’, SAE Technical paper No. 900173, 1990.

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