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US 11,548,519 B2Granted
Calibrating a drive system for an axle of a motor vehicle
AssigneeGKN Automotive AG
InventorsVolker Rene Ruiters, Andreas Langhanki
Life of this patent
Estimating the term…
Abstract
The disclosure relates to a method for calibrating a drive system for an axle of a motor vehicle; wherein the drive system includes at least one electric machine as the drive unit, a drive shaft driven by the drive unit, a first output shaft and a second output shaft, as well as a first clutch connecting the drive shaft to the first output shaft and a second clutch connecting the drive shaft to the second output shaft.
Claims14
A system, comprising a computer including a processor and a memory, the memory storing instructions executable by the processor to:
- a) provide a first torque at a drive unit for a first operating point;
- b) determine a first actuating pressure for a first clutch and a second actuating pressure for a second clutch from a first characteristic diagram and to apply the first and second actuating pressures to first and second output shafts to transmit the first torque based on the first operating point;
- c) determine a first actual differential rotational speed between a rotational speed of the first output shaft and a rotational speed of a drive shaft and a second actual differential rotational speed between a rotational speed of the second output shaft and the rotational speed of the drive shaft;
- d) one of:
- (1) adjust a first calibrated actuating pressure for the first clutch until reaching a first target differential rotational speed and to adjust a second calibrated actuating pressure for the second clutch until reaching a second target differential rotational speed,
- or (2) adjust a first calibrated torque at the drive unit until achieving a first target differential rotational speed on the first clutch and a second target differential rotational speed on the second clutch;
- and
- e) generate a second characteristic diagram based on the calibrated actuating pressures or the first calibrated torque at the drive unit, wherein either the higher value of the actuating pressures is at first changed or both actuating pressures are changed at the same time in a weighting based on their value.
5 more elements
A method, comprising:
- a) providing a first torque at a drive unit for a first operating point;
- b) determining a first actuating pressure for a first clutch and a second actuating pressure for a second clutch from a first characteristic diagram and applying the first and second actuating pressures to first and second output shafts to transmit the first torque based on the first operating point;
- c) determining a first actual differential rotational speed between a rotational speed of the first output shaft and a rotational speed of a drive shaft and a second actual differential rotational speed between a rotational speed of the second output shaft and the rotational speed of the drive shaft;
- d) one of:
- (1) adjusting a first calibrated actuating pressure for the first clutch until reaching a first target differential rotational speed and adjusting a second calibrated actuating pressure for the second clutch until reaching a second target differential rotational speed,
- or (2) adjusting a first calibrated torque at the drive unit until achieving a first target differential rotational speed on the first clutch and a second target differential rotational speed on the second clutch and
- e) generating a second characteristic diagram based on the calibrated actuating pressures or the first calibrated torque at the drive unit, wherein either the higher value of the actuating pressures is at first changed or both actuating pressures are changed at the same time in a weighting based on their value.
4 more elements
Dependencies are inferred from the claim text.