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Internal combustion engine e.g. gasoline engine, operating method, involves detecting running smoothness difference between cylinders, and making mixture lean, and detecting another running smoothness difference between cylinders
Internal combustion engine e.g. gasoline engine, operating method, involves detecting running smoothness difference between cylinders, and making mixture lean, and detecting another running smoothness difference between cylinders
The method involves making a mixture of an internal combustion engine (100) lean in a cylinder (102a), and detecting running smoothness difference between the cylinder and another cylinder (102c). The mixture is made lean in the latter cylinder, and another running smoothness difference between the cylinders is detected. A difference between the two running smoothness differences is evaluated. Running smoothness of the cylinders is determined. The internal combustion engine is regulated by a lambda sensor (112). Independent claims are also included for the following: (1) a computer program comprising instructions to perform a method for operating an internal combustion engine (2) an electrical storage medium for a control and/or regulating device of an internal combustion engine to perform a method for operating the internal combustion engine (3) a control and/or regulating device of an internal combustion engine to perform a method for operating the internal combustion engine.
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