Abstract: A process for determining the flow rate of a fluid, in particular of an air flow of an internal combustion engine, a temperature dependent resistor through which a heating current flows being arranged in the flow path of the fluid, the size of the heating current being a measure of the flow rate of the fluid, the temperature of the resistor being determined by a temperature sensor and being set to a constant value by means of a circuit arrangement which influences the heating current, and the fluid flow rate determined immediately after the start of the fluid flow being corrected by means of a correction value (k, k') in order to compensate for a measurement error which occurs when the heating current is switched on but when fluid is not yet flowing due to temperature deviation of the resistor.

Abstract: With a process and an apparatus for cold-start control in an electronic internal combustion engine system, the combustion chambers of the internal combustion engine are supplied, during starting, with the increased fuel feed. The fuel feed per an ignition interval (TD.sub.n) is effected by a plurality of short cold-start injection pulses generated at increased frequency at linear time intervals with respect to one another in respective ignition intervals. This frequency control replaces the normal formation of fuel injection pulses corresponding to half-periods of crankshaft rotation, during starting, and is cancelled upon commencement of preset fuel reduction thresholds. Owing to the fuel atomisation attained, there results a spontaneously ignitable mixture, so that a cold start is still possible even at extremely cold temperatures.