초록 ▼

A method of determining a combustion air ratio of a reciprocating-piston internal combustion engine includes the steps of measuring a gradient of a combustion chamber pressure as a function of a position of a piston in a piston cylinder, for at least one operating cycle of the engine. Measured signa

A method of determining a combustion air ratio of a reciprocating-piston internal combustion engine includes the steps of measuring a gradient of a combustion chamber pressure as a function of a position of a piston in a piston cylinder, for at least one operating cycle of the engine. Measured signals are formed representing the gradient of the combustion chamber pressure. The measured signals are digitized and entered into a programmed evaluation unit, where they are evaluated on the premise that energy prior to combustion and energy following or toward the end of combustion are at least approximately equal. Further, they are evaluated based on the equation [Figure] [Figure] A value of the combustion air ratio is calculated from the evaluated digitized measured signals in an iterative computation process, and the value is displayed.

대표청구항 ▼

A method of determining a combustion air ratio of a reciprocating-piston internal combustion engine, comprising the steps of: measuring a gradient of a combustion chamber pressure as a function of a position of a piston in a piston cylinder, for at least one operating cycle of the engine; forming me

A method of determining a combustion air ratio of a reciprocating-piston internal combustion engine, comprising the steps of: measuring a gradient of a combustion chamber pressure as a function of a position of a piston in a piston cylinder, for at least one operating cycle of the engine; forming measured signals representing the gradient of the combustion chamber pressure; digitizing the measured signals; entering the digitized measured signal into a programmed evaluation unit; evaluating the digitized measured signals in the programmed evaluation unit on the premise that energy prior to combustion and energy following or toward the end of combustion are at least approximately equal, and based on the equation [Figure] [Figure] calculating a value of the combustion air ratio from the evaluated digitized measured signals in an iterative computation process; and displaying the value.