Alfa Romeo Auto S.p.a.

Alfa Romeo S.p.a.

Luigi Bernardoni

Domenico D'Angelo

Umberto Invernizzi

In a multi-cylinder engine provided with several intake valves per cylinder and with the relative intake ducts, non-return valve means are provided in one of the intake ducts of each cylinder, in series with the respective intake valve.

Intake system for an internal combustion engine provided with several

This invention relates to a diesel engine with an effective compression ratio substantially equal to the geometrical compression ratio, the individual intake ducts of said engine being fitted with automatic non-return valves arranged to prevent air flowing to the outside, and disposed immediately upstream of and in series with the normal intake valves.

Diesel engine with an effective compression ratio substantially equal to

The invention relates to an intake duct for feeding mixture or air to a four-stroke internal combustion engine cylinder provided with the usual intake valve or valves, non-return valve means being provided in said duct in series with said intake valve or valves, said non-return valve means being arranged to allow the flow of mixture or air to said cylinder, and being arranged to prevent the reverse flow of mixture returned by the cylinder, from the intake duct to the outside.

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Tradate, Italy

Luigi Bernardoni