Regie Nationale Des Usines Renault

Christian Guicherd

Pierre Cochard

Pierre Chaffiotte

Takiang Tchang

Alain Saindon

The invention concerns a rocker mechanism designed to put out of use at least one cylinder, or a group or row of cylinders, of an internal combustion engine by acting on the inlet valve. The mechanism includes at least one rocker comprised of two components meshed with one another, one of those components controlling the inlet valve of the cylinder while the other is controlled by the cam shaft of the engine, and associated with control means allowing for the disconnection of the rocker components from one another. Application is to energy savings.

Disconnecting valve rocker mechanism

The invention relates to a speed limiting device for a vehicle driven by an internal combustion engine provided with a twin-body carburettor or a dual fuel injection unit comprising two throttle butterfly valves controlled by the vehicle's accelerator pedal through an operating mechanism, a flexible connection mechanism combined with at least one of the said throttle valves and a depression valve calibrated at a given depression value corresponding to a vehicle speed not to be exceeded and designed to operate, above the said given speed, in the direction of closure, at least one of the said throttle valves combined with the said flexible connection means. The flexible connection means (3-7, 15) is placed between the said throttle valves (P.sub.1, P.sub.2), one of which (P.sub.1) is controlled by the movements of the accelerator pedal, and comprises a spring (6) of the right stiffness to lock the said throttle valves (P.sub.1, P.sub.2) in rotation in the opening direction below the said given speed and to yield and allow the other throttle valve (P.sub.2) to be closed by the depression valve (8, 8a, 8b, 8c) above the said given speed.

Speed limiting device for vehicle driven by internal combustion engine

In a method and apparatus for controlling the fuel feed to a stratified-charge internal combustion engine, from idle up to the position corresponding with the maximum flow of air, the overall richness (r.sub.g) of the combustible mixture is reduced by acting simultaneously upon the flow of fuel feeding the main chamber and upon the flow of fuel injected into the auxiliary chamber. For higher loads the maximum flow of air is kept constant and r.sub.g is increased by continuing to act upon both fuel flows. By keeping the richness of the mixture in the auxiliary chamber substantially constant, it is possible to obtain the best compromise between the performance of the engine and the emission of pollutant gases.

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Le Pecq, France

Christian Guicherd