Patent ID: 6390035
Filing Date: 2002-05-21
Classification: F02B

Abstract:
A multiple-link type reciprocating internal combustion engine, comprising:a piston movable through a stroke in the engine and having a piston pin; a crankshaft changing reciprocating motion of the piston into rotating motion and having a crank pin; a linkage comprising: an upper link connected to the piston pin; a lower link connecting the upper link to the crank pin; and a third link pivoted at one end to a body of the engine and connected at its other end to either of the upper and lower links to permit oscillating motion of the third link on the body of the engine; the upper link, the lower link, and the third link being dimensioned and laid out so that an amplitude of a second-order vibration component of a vibrating system of reciprocating motion of the piston, synchronizing rotary motion of the crankshaft, is reduced to below a predetermined threshold value.