Method of controlling an internal combustion engine
AssigneeRobert Bosch GmbH
InventorsMichael Nicolaou, Juergen Neubert
Life of this patent
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Abstract
A method of controlling an internal combustion engine is described; in this method, at least two operating states are differentiated, at least one operating variable of the engine being controlled, a setpoint torque being predetermined on the basis of the optimum operating point for the respective operating state and on the basis of the position of a throttle valve operated by the driver, the value of at least one operating variable to be output being determined from the setpoint torque. A cylinder-individual firing angle retardation value is predetermined by a knock control system, so that the cylinder-individual firing angle retardation value is taken into account directly in calculating the setpoint torque.
Claims5
A method of calculating a firing angle of an internal combustion engine in which a position of a throttle valve is preselected by a driver, a setpoint torque (mi_fa) being calculated by multiplying a firing angle efficiency (etazwvgd) by an optimum torque (mi_opt), a setpoint of the firing angle (zw_soll) being determined from the setpoint torque (mi_fa), a cylinder-individual firing angle retardation value (dzwkrd) being predetermined by a knock control system,
- wherein the cylinder-individual firing angle retardation value (dzwkrd) is taken into account directly in calculating the firing angle efficiency (etazwvgd).
The method as recited in one of the preceding claims, wherein the cylinder-individual firing angle retardation value (dzwkrd) is additionally taken into account in forming the value of the firing angle (zw_out) to be output, in a manner such that the difference (ddzwkrd) between the average of the cylinder-individual firing angle retardation values (dzwkrdm) and the cylinder-individual firing angle retardation value (dzwkrd) assigned to the particular cylinder is added to a setpoint firing angle (zw_soll).
The method as recited in one of the preceding claims, wherein the cylinder-individual firing angle retardation value (dzwkrd) is composed of an anti-knock value (dzwks) and a firing angle retardation value (dwkr), which depends on the operating point.
Dependencies are inferred from the claim text.