Societe D'etudes De Machines Thermiques

Basset Bretogne Loire-b.b.l.

Francis Charron

The invention relates to a method of manufacturing cooled valves for internal combustion engines. From a first cylindrical billet is formed a valve blank by drilling an axial blind bore therein and machining an inner circumferential groove at the blind end portion of said bore. From a second cylindrical billet is machined a cylindrical rod-shaped core and at least two coolant feed and return flow channels, said core being inserted into the bore of said blank. Then said blank and said core are assembled by a hydrostatic extrusion.

Method of making cooled valves for internal combustion engines and

A device for and process of pre-heating the intake air of a supercharged, low-compression ratio Diesel engine when operating at low loads, comprising the apparatus for and steps of taking the heat required for said pre-heating from at least one portion of the exhaust gases of said engine and conveying it to at least one part of the intake air. The device includes heat exchange apparatus having a heating fluid inlet connected to the diesel engine exhaust line through a three-way valve, a heating fluid outlet, a heated fluid inlet, a heated fluid outlet connected to the intake air duct of the engine, and a heat conveying means moving in a closed path between the heating fluid and the heated fluid. A temperature sensor in the air intake duct controls the three-way valve to apportion the flow of exhaust gases between the heating fluid inlet and the atmosphere to maintain a predetermined minimum intake air temperature.

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Croissy sur Seine, France

Francis Charron