Variable compression ratio control system for internal combustion engines

Claim 1

A variable compression ratio internal combustion engine controlled by a throttle comprising, a main cylinder block with a cylinder bore and a cylinder head over said cylinder bore, a piston reciprocatingly mounted in said cylinder bore, a combustion space between said piston and said cylinder head, a passage for compressed combustible gases passing through said cylinder head, said passage connected to a separate second cylinder in which a first auxiliary piston is slidably mounted, said auxiliary piston supported on a piston rod, said piston rod extending to a second auxiliary piston that is also reciprocatingly mounted so that both pistons float in opposed relationship in said separate cylinder, said first and second auxiliary pistons movable in said separate cylinder away from said combustion area when there is an increased pressure in said main cylinder, and a check valve in said cylinder to limit the degree of movement, a hydraulic fluid pressure system controlled by the throttle that is in turn connected to a differential resolver, said differential resolver controlling a rotary valve through which the hydraulic fluid pressure passes to one end of said second cylinder to act upon said second auxiliary piston, said fluid pressure acting upon the second auxiliary piston producing a floating motion of both first and second auxiliary pistons between a maximum compression and a minimum compression to in turn vary the position of the first auxiliary piston and in turn vary the compression in the combustion area, said second cylinder having a stop at one end to limit the movement of said first auxiliary piston when said combustion area of said main cylinder is exhausted of its pressure charge.