Internal-combustion engines – Poppet valve operating mechanism – With means for varying timing
Patent
1991-07-22
1992-10-20
Cross, E. Rollins
Internal-combustion engines
Poppet valve operating mechanism
With means for varying timing
123 9031, 464 2, F01L 134
Patent
active
051561190
ABSTRACT:
A valve timing control apparatus for use in an internal combustion engine having a crankshaft driven by the engine and a camshaft adapted to drive at least one valve. The valve timing control apparatus comprises a rotary member drivingly connected to the crankshaft for rotation with rotation of the crankshaft, and a coupling mechanism for coupling the rotary member to the camshaft to transmit rotation of the rotary member to the camshaft. The rotary member has at least one rotary disc rotatably supported thereon, the rotary disc having a peripheral surface. A pair of friction members is provided on the opposite sides of the rotary member. The friction members are moved in a first direction bringing one of the friction members into frictional engagement with the peripheral surface of the rotary disc so as to rotate the rotary disc in a forward direction and in a second direction bringing the other friction member into frictional engagement with the peripheral surface of the rotary disc so as to rotate the rotary disc in a reversed direction. Rotation of the rotary disc is transmitted through the coupling mechanism to move the camshaft at a desired position with respect to the rotary member.
REFERENCES:
patent: 4231330 (1980-11-01), Garcea
patent: 4754727 (1988-07-01), Hampton
patent: 4841924 (1989-06-01), Hampton et al.
patent: 5031585 (1991-07-01), Muir et al.
patent: 5056479 (1991-10-01), Suga
Atsugi Unisia Corp.
Cross E. Rollins
Kananen Ronald P.
Lo Weilun
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