Robert Boschgmbh

Jurgen Assenheimer

Johannes Brettschneider

Reinhard Latsch

Valerio Bianchi

Dieter Scherenberg

The process and apparatus disclosed herein is concerned with adjusting the composition of a combustible mixture supplied to an internal combustion engine by adding a supplementary quantity of air to the suction tube thereof. As disclosed the supplementary substance quantity is controlled as a dependent function of the fuel fed to the internal combustion engine and the fuel fed is gauged by way of the gas pressure in the exhaust system of the internal combustion engine.

Method and apparatus for controlling the operating mixture supplied to

The induction tube of an internal combustion engine is provided with an air flow measuring device which may be part of a carburetor and with a normal throttle valve, settable arbitrarily from the outside. A bypass channel conducts air around one or both of these elements and contains a flow restricting device. The induction tube further includes an air flow throttling mechanism for establishing a definite pressure drop across the inlet and terminus of the bypass to insure air flow therethrough even at full throttle and low rpm when the engine vacuum is low. The air flow throttling mechanism may be a pivoted baffle plate or a slide which enters the induction tube and partially blocks the air flow therethrough and which is moved by differential pressures in the induction tube. The slide retracts from the induction tube at full throttle and at high engine speed.

Supplementary air supply system for an internal combustion engine

A process for controlling the operation of an internal combustion engine based on the volumetric efficiency of the engine to define a primary nominal fuel quantity. The process also includes measuring the fluctuations in the volumetric efficiency. In order to operate the engine in a preferred leaned-out condition, a nominal set-point value of the permitted range of fluctuations of the volumetric efficiency is established and the actual measured fluctuations are maintained in that range by changing the fuel metered out to the engine. Various methods for measuring the volumetric efficiency indirectly by pressure measurements in the induction tube are presented.

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Vaihingen, Germany

Jurgen Assenheimer