Internal combustion engine piston crank mechanism

Details Internal combustion engine piston crank mechanism Internal combustion engine piston crank mechanism

2008-04-15

2008-04-15

Vo, Hieu T. (Department: 3747)

Internal-combustion engines

Four-cycle

Variable clearance

C123S0480AA, C123S197400

Reexamination Certificate

active

11717957

ABSTRACT:
A piston crank mechanism has an upper link coupled to a piston by a piston pin, a lower link having a crankpin journal, wherein the crankpin journal is coupled to a crankpin of a crankshaft and is coupled to the upper link by an upper pin, and a control link is coupled to an eccentric cam of a control shaft that is supported by an engine block and coupled to a control pin boss by a control pin. The crankpin journal of the lower link is arranged and dimensioned relative to the upper pin such that a projection area defined by projecting the width of the upper pin along a direction line passing through a center of the piston pin and a center of the upper pin does not obscure an area defined by the crankpin during operation of the crankshaft as viewed in an axial direction of the crankpin.

REFERENCES:
patent: 6684828 (2004-02-01), Ushijima et al.
patent: 2006/0137629 (2006-06-01), Mizuno et al.
patent: 2004-124776 (2004-04-01), None

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