Variable length connecting rod for internal combustion engine

Details Variable length connecting rod for internal combustion engine Variable length connecting rod for internal combustion engine

1991-11-22

1993-09-21

Argenbright, Tony M.

Internal-combustion engines

Transmission mechanism from piston

Crankshaft and connecting rod

74579E, 92187, F02B 7532

Patent

active

052459624

ABSTRACT:
An improved apparatus in an internal combustion engine for causing a piston to remain generally at the top dead center position for a period after the crank has passed top dead center, permitting constant volume combustion of a fuel mixture. A rotatable disc mounted in the upper sleeve end of a connecting rod as an eccentric bore for receiving the wrist pin of a piston. Another eccentric bore in the disc pivotally receives an upper end of a rigid shifter bar. An intermediate portion of the shifter bar is slidably attached to a pin mounted to a lower portion of the piston and a lower portion of the shifter bar is slidably attached to a pin mounted to an intermediate portion of the connecting rod. Thus, angular movement of the connecting rod relative to the pin will cause the shifter bar to rotate the disc imparting an upward motion to the piston to counteract for a time the downward motion of the connecting rod. The position of at least one of the pins may be remotely controlled to be repositioned in proportion to engine speed, or to accommodate alternative fuels.

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