Method And Device For Operating An Internal Combustion Engine

摘要

The present disclosure relates to internal combustion engines in general. The teachings may be embodied in methods and devices for operating an internal combustion engine having one or more cylinders which are each assigned gas inlet valves. The method may include: in a first operating state, determining a model temperature of a gas in the intake tract cyclically for a present point in time using a predefined intake pipe model without reference to a present temperature measurement value of the gas; determining a cylinder air mass situated in a respective cylinder after closing the gas exchange valves based at least in part on the model temperature determined for the present point in time; and metering fuel into the respective cylinder based at least in part on the determined cylinder air mass. The model temperature for the present point in time depends at least in part on a model temperature determined for a preceding point in time.

主权项

1. A method for operating an internal combustion engine comprising an intake tract and one or more cylinders with associated gas exchange valves comprising gas inlet valves and gas outlet valves, the method comprising:
in a first operating state, determining a model temperature of a gas in the intake tract cyclically for a present point in time using a predefined intake pipe model without reference to a present temperature measurement value of the gas; wherein the model temperature for the present point in time depends at least in part on a model temperature determined for a preceding point in time; determining a cylinder air mass situated in a respective cylinder after closing the gas exchange valves based at least in part on the model temperature determined for the present point in time; and metering fuel into the respective cylinder based at least in part on the determined cylinder air mass.