Method for operating a motor vehicle by creep mode of the clutch
AssigneeZF Friedrichshafen AG
InventorsStefan Bemetz, Roland Mair, Achim Chiandetti, Thomas Jäger
Life of this patent
Estimating the term…
Abstract
A method of controlling a creep mode of a motor vehicle with a drive train having a drive unit (1), a gear mechanism (2) and a friction clutch (4) arranged between the drive unit (1) and the gear mechanism (2). The creep function, for controlling the creep mode, having a first partial function for controlling the creep mode, in a case of an activated brake pedal (15), and a second partial function for controlling a creep mode, in a case of a non-activated brake pedal (15). The first partial function of the creep function is only activated once the second partial function of the creep function is activated.
Claims9
A method for controlling a creep mode of a motor vehicle with a drive train having a drive unit, a gear mechanism and a friction clutch arranged between the drive unit and the gear mechanism, in which a creep function for controlling the creep mode comprises a first partial function for controlling the creep mode in a case of an activated brake pedal and a second partial function for controlling the creep mode in a case of a non-activated brake pedal, the method comprising:
- only activating the first partial function of the creep function once the second partial function of the creep function has been activated;
- and
- activating the first partial function and deactivating the second partial function when the brake pedal is moved from a non-activated position to a position which lies between the non-activated position and a predefined threshold value of the brake pedal position or of a braking pressure.
A control device for controlling a creep mode of a motor vehicle comprising at least a reception interface, which is designed to receive input signals from drive train components, an analysis unit to analyze either the received input signals or information from the received input signals, and a sending interface to emit control signals to the drive train components, the control device being designed to control the creep mode of the motor vehicle by a creep function,
- wherein the control device only enables a first partial function for controlling the creep mode, in a case of an activated brake pedal, when previously a second partial function for controlling the creep mode, in a case of a non-activated brake pedal, has been activated by the control device, and
- the control device enabling activation of the first partial function and deactivation of the second partial function when the brake pedal is moved from a non-activated position to a position which lies between the non-activated position and a predefined threshold value of the brake pedal position or of a braking pressure.
A computer program product with program code means, which are stored on a computer-readable medium to carry out a method for controlling a creep mode of a motor vehicle when the computer program product is executed on either a computer or a control device of the motor vehicle with a drive train having a drive unit, a gear mechanism and a friction clutch arranged between the drive unit and the gear mechanism, in which a creep function for controlling the creep mode comprises a first partial function for controlling the creep mode, in a case of an activated brake pedal, and a second partial function for controlling the creep mode, in a case of a non-activated brake pedal, the method comprising only activating the first partial function of the creep function once the second partial function of the creep function is activated, and activating the first partial function and deactivating the second partial function when the brake pedal is moved from a non-activated position to a position which lies between the non-activated position and a predefined threshold value of the brake pedal position or of a braking pressure, the computer or the control device having a reception interface, which is designed to receive input signals from drive train components, an analysis unit to analyze either the received input signals or information from the received input signals, and a sending interface to emit control signals to the drive train components, the control device being designed to control the creep mode of the motor vehicle by the creep function, the control device only enabling the first partial function for controlling the creep mode in the case of the activated brake pedal when previously the second partial function for controlling the creep mode in the case of the non-activated brake pedal has been activated by the control device.
Dependencies are inferred from the claim text.