Method for starting a mobile vehicle
AssigneeZF Friedrichshafen AG
InventorsHans Höfler, Joachim Sauter, Norbert Brugger, Matthias Duller
Life of this patent
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Abstract
A method of starting or holding a mobile vehicle and, in particular, a working machine. The method determines whether the vehicle is rolling backward on an inclined surface and, as a function of that knowledge, the rotational speed of the drive engine is increased, or a downshift by one gear is carried out in the transmission.
Claims7
A method of starting or holding a mobile vehicle, having a drive engine which drives a vehicle wheel by way of a hydrodynamic torque converter, the method comprising:
- either:
- increasing a rotational speed of the drive engine, or
- downshifting a shiftable step-down transmission from an engaged gear ratio to a higher gear ratio,
- for starting or holding the vehicle as a function of at least one condition parameter of the vehicle;
- and
- determining an inclination of the vehicle, as the at least one condition parameter, by an inclination sensor, and
- above a predetermined inclination of the mobile vehicle, increasing the rotational speed of the drive engine.
A method of starting or holding a mobile vehicle, having a drive engine which drives a vehicle wheel by way of a hydrodynamic torque converter, the method comprising:
- either:
- increasing a rotational speed of the drive engine, or
- downshifting a shiftable step-down transmission from an engaged gear ratio to a higher gear ratio,
- for starting or holding the vehicle as a function of at least one condition parameter of the vehicle;
- and
- determining, as the at least one condition parameter, an inclination of the vehicle by an inclination sensor, and,
- above a predefined inclination of the mobile vehicle, downshifting the shiftable step-down transmission from an engaged gear ratio to a higher gear ratio.
A method of starting or holding a mobile vehicle, having a drive engine which drives a vehicle wheel by way of a hydrodynamic torque converter, the method comprising:
- either:
- increasing a rotational speed of the drive engine, or
- downshifting a shiftable step-down transmission from an engaged gear ratio to a higher gear ratio,
- for starting or holding the vehicle as a function of at least one condition parameter of the vehicle;
- and
- determining, with a sensor, a rotation direction of a vehicle wheel of the mobile vehicle as the at least one condition parameter, and
- when a gear is engaged for a forward driving direction and the vehicle wheel rotates in a backward driving direction, increasing the rotational speed of the drive engine.
Dependencies are inferred from the claim text.