A PCV system for an internal combustion engine that can suppress occurrence of preignition due to oil inflow into a cylinder is provided. A path switching valve 70 is controlled so that blowby gas flows via a bypass passage 72, in a preig occurrence region...

The function of the fresh air mass flow detected by an air mass sensor (25) connected to the internal combustion engine (1) is determined, and a cylinder filling of one of the cylinders (6) of the internal combustion engine is determined. During operation ...

A working gas circulation engine includes a combustion chamber (10a) that can expand a working gas, which has a specific heat ratio higher than that of the air, with the combustion between an oxidizing agent and a fuel; a circulation path (20) that can all...

The saddle type vehicle includes an engine (3), an intake path (35), an air cleaner (42), a blow-by gas path (92), a catch tank (60), an air path (78), and an airflow control valve (66). The engine (3) includes a crank case (31). The intake path (35) is co...

To provide a blowby gas ventilation system for an internal combustion engine capable of preventing oil from being diluted by efficiently and quickly exhausting a blowby gas together with a water content and the like from a crank chamber through forced vent...

The internal combustion engine for a motor vehicle has a fuel tank and a fuel pump (26) to feed a fuel injector (20). A leakage passage (36) feeds fuel to an air inlet (18) of the engine and has a lubricant separator (42) to prevent lubricant entering the ...