Method and Device for Operating an Internal Combustion Engine

摘要

The present disclosure provides a method for adjusting the operation of an internal combustion engine comprising: determining a gradient of an overrun-air line based on an ambient condition and a current operating point; determining a value for a cylinder air mass situated in a cylinder after closure of the gas exchange valves; and using the determined cylinder air mass to adjust one or more operating parameters of the internal combustion engine. The overrun-air line may correspond to an air mass situated in the respective cylinder after closure of the gas exchange valves at predefined operating temperature for the engine, when the engine is operated briefly without fuel metering and combustion. Determining a cylinder air mass may be based at least in part on the current operating point and the current ambient value of the at least one ambient variable.

主权项

1. A method for operating an internal combustion engine having one or more cylinders each assigned corresponding gas inlet valves and gas outlet valves, wherein gas exchange valves comprise gas inlet valves and gas outlet valves, the method comprising:
determining a gradient of an overrun-air line for a current ambient value of at least one ambient variable of the internal combustion engine based at least in part on a current operating point of the internal combustion engine, wherein the overrun-air line corresponds to an air mass situated in the respective cylinder after closure of the gas exchange valves if, in the case of the internal combustion engine being at a predefined operating temperature, said internal combustion engine is operated briefly without fuel metering and combustion, and determining a cylinder air mass situated in the respective cylinder after closure of the gas exchange valves based at least in part on the respective current operating point and the respective current ambient value of the at least one ambient variable, and using the determined cylinder air mass to adjust one or more operating parameters of the internal combustion engine.