Method and arrangement for controlling the drive unit of a vehicle

• US 20010029422A1
• Filed: 04/06/2001
• Published: 10/11/2001
• Est. Priority Date: 04/06/2000
• Status: Active Grant

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Schmitt, Johannes
• Granted Patent: US 6,466,856 B2
• Time in Patent Office: Days
• US Class Current: 701/82
• CPC Class Codes: B60K 28/16 responsive to, or preventing, skidding of wheels brake control systems for vehicle drive stability B60T8/1755; arrangements responsive to a speed condition for adjusting wheel braking force B60T8/32; control of vehicle driving stability otherwise than by controlling the propulsion unit only B60W30/02; preventing wheel slippage by reducing power in rail vehicles B61C15/00
• CPC Class Codes: B60W 2710/105 Output torque

Abstract

The invention is directed to a method and an arrangement for controlling the drive unit of a vehicle wherein a control quantity of the drive unit is controlled in dependence upon a driver command value. A limiting of the increase of the control quantity is undertaken when the driver command value exceeds a pregiven threshold value.

Claims

1. A method for controlling a drive unit of a vehicle wherein an operator of the vehicle inputs an input value for a control quantity of the drive unit, the method comprising the steps of:

controlling said control quantity on the basis of said input value of the operator; and

,

limiting an increase of said control quantity when said input value of the operator is greater than a pregiven threshold value.

2. The method of

claim 1

, comprising the further steps of:

determining the maximally transmittable value for said control quantity; and

,

deriving said threshold value from said maximally transmittable value.

3. The method of

claim 2

, wherein said maximum value represents the torque maximally transmittable to a roadway.

4. The method of

claim 1

, comprising the further step of limiting the increase of said control quantity by providing an input value which forms the basis for the control of said control quantity of said drive unit in lieu of said input value of the operator.

5. The method of

claim 1

, comprising the further step of providing a drive slip controller having a last desired value input which is stored during a slip control intervention.

6. The method of

claim 1

, comprising the further step of controlling said control quantity of said drive unit to a start value when said threshold value is exceeded by said input value of the operator.

7. The method of

claim 6

, comprising the further step of forming said start value from said maximum value or from the minimum value of said maximally transmittable value and the stored value.

8. The method of

claim 6

, comprising the further step of increasing said control quantity of said drive unit in dependence upon time starting from said start value.

9. The method of

claim 8

, wherein said increase is also dependent upon an operating variable.

10. The method of

claim 1

, wherein said control quantity of said drive unit is a torque value.

11. The method of

claim 1

, wherein the limiting of said increase is again permitted when said input value of the operator again drops below said threshold value.

12. An arrangement for controlling a drive unit, the arrangement comprising:

a control unit for determining an operator input value for controlling a control quantity of said drive unit in dependence upon signals representing operating variables;

means for forming a control signal for controlling said control quantity of said drive unit on the basis of said operator input value; and

,

means for limiting an increase of said control quantity of said drive unit when said operator input value exceeds a pregiven threshold value.