US 2003/0188707 A1Published application

Internal combustion engine provided with decompressing mechanisms

AssigneeHonda Giken Kogyo Kabushiki Kaisha

InventorsHideaki Takada, Nobuo Suzuki, Hiroyuki Yoshida

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Abstract

An internal combustion engine is provided with a decompressing mechanism (D) including: a pin (71) supported so as to be turnable on a camshaft (15); a flyweight(81) supported for turning relative to the camshaft (15) by the pin (71) on the camshaft (15); and a decompression cam (82) capable of operating together with the flyweight (81) to apply valve opening force to the engine valve(43). The pin (71) is inserted in holes (84) formed in the flyweight (81) so as to be turnable. A spring washer (72) restrains the pin (71)and the flyweight (81) from movement relative to each other, so that generation of rattling noise due to collision between the pin (71) and the flyweight (81) can be prevented or controlled.

Claims10

Dependent claims

An internal combustion engine comprising:

a crankshaft;
a camshaft driven for rotation in synchronism with the crankshaft;
an engine valve controlled for opening and closing by a valve-operating cam;
and a decompressing mechanism for opening the engine valve during a compression stroke in a starting phase;
wherein the decompressing mechanism includes:
a pin supported so as to be turnable on the camshaft;
a flyweight supported for turning relative to the camshaft by the pin on the camshaft;
and a decompression cam operating together with the flyweight to apply valve opening force to the engine valve;
the pin is inserted in holes formed in the flyweight so as to be turnable;
and restraining means is provided to restrain the pin and the flyweight from movement relative to each other.

7 more elements

Dependencies are inferred from the claim text.