초록 ▼

A process determines the torque transmitted by the gas forces to the crankshaft of an internal-combustion engine. The rotational speed data which is detected by determining the angular speed of a component fixedly connected with the crankshaft is analyzed, and the rotating moment is computed from th

A process determines the torque transmitted by the gas forces to the crankshaft of an internal-combustion engine. The rotational speed data which is detected by determining the angular speed of a component fixedly connected with the crankshaft is analyzed, and the rotating moment is computed from the angular speed correlated with the rotational speed by way of the moment of inertia of the engine. In addition to the rotational moment of the engine, the torques of the oscillating masses, the torsional moments of the crankshaft and the static torques resulting from all slowly variable friction moments, effective moments and load moments are determined. From a balance of these individual torques, the torque resulting form the gas forces is determined. Subsequently, the work delivered by the individual cylinders per working cycle is determined from this torque. The thus determined operating parameters is used for the engine control and/or for the on-board diagnosis.

대표청구항 ▼

Process for determining operating parameters of an internal-combustion engine, comprising the steps of analyzing a rotational speed data which is detected by determining rotational speed of a component fixedly connected with an engine crankshaft, a rotating moment being computed by an inertia moment

Process for determining operating parameters of an internal-combustion engine, comprising the steps of analyzing a rotational speed data which is detected by determining rotational speed of a component fixedly connected with an engine crankshaft, a rotating moment being computed by an inertia moment of the engine from angular speed correlated with the rotational speed, using an engine model to compute torque of oscillating masses, moment of crankshaft torsion and static torque composed of slowly variable friction moments, effective moments and load moments, determining torque on a cylinder-individual basis from the torques and moments, resulting from gas pressures in engine cylinders, and supplying the resulting torque to at least one of a control system and/or a diagnostic system.