초록 ▼

A method and a device for operating an internal combustion engine make it possible to shift the combustion limit. In this context, a predefined output variable of the internal combustion engine such as the torque, for example, is realized in at least one operating state of the internal combustion en

A method and a device for operating an internal combustion engine make it possible to shift the combustion limit. In this context, a predefined output variable of the internal combustion engine such as the torque, for example, is realized in at least one operating state of the internal combustion engine by at least a retardation of an ignition angle. It is checked whether, due to the retardation of the ignition angle, a variable like, for example, a misfiring, characteristic for the combustibility of the air/fuel mixture in a combustion chamber of the internal combustion engine, exceeds a predefined limiting value in terms of a deterioration of the combustibility, and in this case, at least one actuator of the internal combustion engine, different from an actuator for setting the ignition angle, such as the exhaust-gas recirculation valve or EGR valve, for instance, is controlled along the lines of improving the combustibility of the air/fuel mixture.

대표청구항 ▼

What is claimed is: 1. A method for operating an internal combustion engine, comprising:obtaining a predefined output variable of the internal combustion engine in at least one operating state of the internal combustion engine at least by a retardation of an ignition angle;checking whether, due to t

What is claimed is: 1. A method for operating an internal combustion engine, comprising:obtaining a predefined output variable of the internal combustion engine in at least one operating state of the internal combustion engine at least by a retardation of an ignition angle;checking whether, due to the retardation of the ignition angle, a variable characteristic for a combustibility of an air/fuel mixture in a combustion chamber of the internal combustion engine exceeds a predefined limiting value in terms of a deterioration of the combustibility, and if the predefined limiting value is exceeded, driving at least one actuator of the internal combustion engine, which is different from an actuator for setting the ignition angle, to improve the combustibility of the air/fuel mixture; andcompensating for a jump in torque at an instant of a switchover between a first operation of the internal combustion engine with a first number of activated cylinders and a second operation of the internal combustion engine with a second number of activated cylinders, wherein the compensating is substantially based on the retardation of the ignition angle.