Method for preventing stalling of an internal combustion engine of a motor vehicle
AssigneeVolkswagen Aktiengesellschaft
InventorRainer Hofmann
Life of this patent
Estimating the term…
Abstract
A method for preventing stalling of an internal combustion engine of a motor vehicle, wherein the motor vehicle has at least one internal combustion engine, at least one automatically controlled clutch, and at least one transmission, wherein a drive shaft of the internal combustion engine can be coupled to a transmission input shaft of the transmission by means of the clutch to transmit torque, wherein the clutch is disengaged if a calculated rotational speed value of the drive shaft is less than a certain threshold value, and wherein the rotational speed value is calculated, in particular continually or continuously, as a function of a determined, current rotational speed of the drive shaft and as a function of a determined, current speed gradient of the drive shaft.
Claims10
A method for preventing stalling of an internal combustion engine of a motor vehicle, the motor vehicle comprising at least one internal combustion engine, at least one automatically controlled clutch, and at least one transmission, wherein a drive shaft of the internal combustion engine is adapted to be coupled to a transmission input shaft of the transmission via the clutch to transmit torque, wherein the clutch is designed as part of an automatic transmission or part of an automatic dual-clutch transmission, the method comprising:
- calculating a rotational speed value continually or continuously as a function of a determined, current rotational speed of the drive shaft and as a function of a determined, current speed gradient of the drive shaft;
- determining a current temperature of the clutch;
- determining a response time of the clutch as a function of the temperature of the clutch via a control and/or regulation device of the motor vehicle;
- and
- calculating the rotational speed value from a sum of the determined, current rotational speed of the drive shaft and the product of the current speed gradient of the drive shaft and the response time of the clutch;
- and
- disengaging the clutch if the calculated rotational speed value of the drive shaft is less than a certain threshold value.
Dependencies are inferred from the claim text.