Internal-combustion engines – Poppet valve operating mechanism – Overhead camshaft
Patent
1999-06-24
2000-10-03
Lo, Wellun
Internal-combustion engines
Poppet valve operating mechanism
Overhead camshaft
123 9041, 123 9044, F01L 118
Patent
active
061258067
ABSTRACT:
In a valve drive system, a plurality of intake or exhaust valves are disposed radially in a cylinder, and the intake or exhaust valves each are driven by respective rocker arms supported for rotation on a cylinder head via a rocker pin and an intake or exhaust cam shaft having three-dimensional cams for engaging these rocker arms. A boss of the rocker arm is coupled to the rocker pin for tilting movement in a direction perpendicular to the axis of the rocker pin. The rocker arm is tiltable with respect to the rocker pin to follow the three-dimensional cam surface. The cam surface can be in line contact with the sliding surface of the rocker arm throughout its circumference.
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Patents Abstract of Japan, vol. 008, No. 124 (M-301), Jun 9, 1994 & JP 59 029709 A (Honda Giken Kogyo KK), Feb. 17, 1984.
Narita Matsunori
Nishi Kengo
Saiki Yuji
Takahashi Toshiyuki
Lo Wellun
Yamaha Hatsudoki Kabushiki Kaisha
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