Abstract: A method and a device for operating an internal combustion engine allow an optimal restriction of the ignition angle. In this context, a limit value for an ignition angle is specified as a function of an operating point of the internal combustion engine. The limit value for the ignition angle is corrected as a function of a misfire limit of the internal combustion engine.

Abstract: The invention relates to a method for operating an internal combustion engine (1) especially of a motor vehicle, wherein fuel, which is to be injected into a combustion chamber (4) or into an intake manifold (7) of the engine (1), is present in a pressure store (13) at a variable injection pressure (p). The injection pressure (p) in the pressure store (13) is adjusted in dependence upon the temperature (T) of the engine (1) in order to obtain an optimal operation of the engine (1) with respect to the lowest possible consumption of fuel and a lowest possible exhaust-gas emission in specific operating states of the engine (1), for example, after a cold start or during a warm-up phase. Preferably, the injection pressure (p) is increased at a temperature (T) of the engine (1) below the operating temperature thereof. In addition, the injection time point can be adjusted to later time points at low temperatures (T) of the engine (1).

Abstract: A method and a device for operating an internal combustion engine allow an optimal restriction of the ignition angle. In this context, a limit value for an ignition angle is specified as a function of an operating point of the internal combustion engine. The limit value for the ignition angle is corrected as a function of a misfire limit of the internal combustion engine.

Abstract: The invention relates to a method for operating an internal combustion engine (1) especially of a motor vehicle, wherein fuel, which is to be injected into a combustion chamber (4) or into an intake manifold (7) of the engine (1), is present in a pressure store (13) at a variable injection pressure (p). The injection pressure (p) in the pressure store (13) is adjusted in dependence upon the temperature (T) of the engine (1) in order to obtain an optimal operation of the engine (1) with respect to the lowest possible consumption of fuel and a lowest possible exhaust-gas emission in specific operating states of the engine (1), for example, after a cold start or during a warm-up phase. Preferably, the injection pressure (p) is increased at a temperature (T) of the engine (1) below the operating temperature thereof. In addition, the injection time point can be adjusted to later time points at low temperatures (T) of the engine (1).