Importance

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Abstract

The invention relates a system for an internal combustion engine using a fluid as a virtual fast piston with variable stroke. This system enables the engine to behave like a variable compression ratio engine. It consists of a duct relatively long and narrow serving as a cylinder for the virtual piston and opening into a valve. This duct is an extension of the clearance volume in the cylinder head of the engine. When the piston arrive near to the top dead center, a second compression of the air/fuel mixture is carried out by introducing a fluid at high-pressure via a valve. The introduction of fluid in a duct is manifested as a jet of fluid without mixing with the air/fuel mixture. This system allows regardless of the load, to regulate the pressure at the ignition of combustion and to increase the quantity of matter in the cylinder, despite the air/fuel mixture is close to Stochiometric proportions.

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First Claim