METHOD OF OPERATING AN ENGINE

摘要

A method of operating an engine is provided. The method includes determining a temperature and a pressure of intake air, and a temperature and a pressure of exhaust generated by the engine. The method includes determining a work performed by the engine based at least on an engine speed of the engine, and determining heating losses of the engine. The method includes determining an enthalpy of the intake air based at least on the work, the heating losses, a heating value of a fuel used for combustion within the engine, and the temperature and the pressure of the exhaust. The method includes determining a humidity value of the intake air based on the enthalpy, temperature and pressure of the intake air and determining an amount of NOx based on the humidity value. The method further includes controlling an operation of the engine based on the determined amount of NOx.

主权项

1. A method of operating an engine, the method comprising:
determining a temperature and a pressure of intake air; determining a temperature and a pressure of exhaust generated by the engine; determining a work performed by the engine based at least on an engine speed of the engine; determining heating losses of the engine; determining an enthalpy of the intake air based at least on the work performed by the engine, the heating losses of the engine, a heating value of a fuel used for combustion within the engine, and the temperature and the pressure of the exhaust; determining a humidity value of the intake air based on the enthalpy, the temperature and the pressure of the intake air; determining an amount of NOx based at least on the humidity value of the intake air; and controlling an operation of the engine based on the determined amount of NOx.