Method and arrangement for controlling the speed of a vehicle
AssigneeRobert Bosch GmbH
InventorsJohannes Schmitt, Tobias Weiss
Life of this patent
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Abstract
The invention is directed to a method and an arrangement for controlling the speed of a vehicle. The actual speed of the vehicle is determined and a desired speed and/or limit speed is pregiven. Furthermore, an engine drag torque controller and/or a drive slip controller are provided. The deviation between desired and/or limit and actual speed is supplied to at least one of these controllers. In the active speed control operation, at least one of these controllers influences an output quantity of the drive unit in dependence upon the speed deviation. In the active road speed limit operation, the drive slip controller influences an output quantity of the drive unit in dependence upon the speed deviation.
Claims12
A method for controlling the speed of a vehicle having a drive unit, the method comprising the steps of:
- pregiving a desired speed of said vehicle;
- determining the actual speed of said vehicle;
- providing a drive slip controller and an engine drag torque controller which generate at least one control quantity for controlling an output quantity of said drive unit in dependence upon the wheel behavior of at least one drive wheel;
- determining the deviation between said desired and actual speeds;
- and,
- for controlling the road speed, forming said one control quantity in dependence upon said deviation.
A method for controlling the speed of a vehicle having a drive unit, the method comprising the steps of:
- pregiving a limit speed;
- determining the actual speed of said vehicle;
- providing a drive slip controller for generating at least one control quantity for controlling an output quantity of said drive unit in dependence upon the wheel behavior of at least one drive wheel;
- determining the deviation between said limit speed and said actual speed;
- and,
- for limiting the road speed, forming at least one control quantity of said drive slip controller in dependence upon said deviation.
An arrangement for controlling the speed of a vehicle, the arrangement comprising:
- a control unit for detecting the actual speed of said vehicle and for outputting a desired speed of said vehicle;
- an engine drag torque controller for generating a control quantity in dependence upon the behavior of at least one drive wheel;
- a drive slip controller for generating at least one control quantity in dependence upon the behavior of at least one drive wheel;
- means for forming the deviation between said actual and desired speeds of said vehicle;
- and,
- at least one of said controllers being so configured that said one controller changes the control quantity thereof in dependence upon said deviation between said desired and actual speeds.
An arrangement for controlling the speed of a vehicle having a drive unit, the arrangement comprising:
- a control unit for detecting the actual speed and for inputting a limit speed;
- a drive slip controller for generating a control quantity in dependence upon the behavior of at least one drive wheel;
- means for forming the deviation between said limit speed and said actual speed;
- and,
- said drive slip controller being so configured that said drive slip controller changes the control quantity thereof in dependence upon said deviation in the active drive speed limit operation.
Dependencies are inferred from the claim text.