METHOD FOR DETERMINING QUANTITIES OF FUEL DURING A DIRECT INJECTION OF A MOTOR VEHICLE

摘要

In the method provided herein, quantities of fuel are determined during a direct injection of a motor vehicle. In this connection, within one work cycle, test injections are carried out in two cylinders of an internal combustion engine of the motor vehicle during overrun phases, speed oscillations of moved masses of the cylinders are measured and a relative difference in quantity of the fuel quantity of the test injections within one work cycle is determined from the speed oscillations. By evaluating a relative signal between the test injections within one work cycle in the two cylinders, an intrinsic dependence of the drive train of the quantity of fuel signal is compensated.

主权项

1. A method for determining a quantity of fuel during a direct injection of a motor vehicle, comprising:
carrying out test injections in two cylinders of an internal combustion engine of the motor vehicle during overrun phases within one work cycle; measuring speed oscillations of moved masses of the cylinders; and determining a relative difference in quantity of a quantity of fuel of the test injections within one work cycle from the speed oscillations.