METHOD FOR IMPROVING THE EFFICIENCY OF AN INTERNAL-COMBUSTION ENGINE IN PARTICULAR A SUPERCHARGED ONE

摘要

The method is for operation of a four-stroke-cycle internal combustion engine. It gives an effective compression ratio that is capable of automatic variation, without introducing additional elements whatever the load, by adapting the engine cycle timing diagram(fig.). The timing diagram includes an overlap stage between the lifts of at least one exhaust valve and at least one intake valve. The intake valve is closed near or before the bootom, dead center of the piston. The exhaust valve is closed beyond the instant of fixed closing of the intake valve.