Method for starting a motor vehicle engine and engine control unit for controlling a motor vehicle engine

摘要

A method for starting an automotive engine is provided with the steps of measuring the progression of a rotational speed of an engine shaft of the motor vehicle engine, determining an estimated rotational speed of the engine shaft which is likely to be present after a power stroke in a cylinder of the vehicle engine to be ignited next, comparing the estimated rotational speed with a resonance rotational speed range of in particular, as a dual mass flywheel, vibration damper, wherein within the resonance speed range resonant vibrations occur in the vibration damper, and in the case that the estimated speed is within the resonance speed range, changing introduction parameters for the introduction, in particular suction and / or injection of a Einbringfluids, in particular fuel and / or a fuel / air mixture, into the cylinder and / or changing an ignition timing of the cylinder, so that after changing in the current for the cylinder used set injection parameters and the currently set ignition timing then the expected estimated speed is outside the resonance speed range. By determining the estimated speed by a prediction based on the measured speed history, a lingering of the current speed within the resonance speed range can be avoided and a fast passage of the resonance speed range can be achieved during the working stroke of the cylinder, so that a low occurrence of resonance vibrations in a drive train of a motor vehicle and simultaneously with a start of the motor vehicle engine quickly achievable idle speed is possible.