Method and device for controlling the speed of a vehicle

• US 20050021211A1
• Filed: 09/06/2002
• Published: 01/27/2005
• Est. Priority Date: 10/11/2001
• Status: Active Grant

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Schulte, Hans, Muehlbauer, Christian, Kustosch, Mario, Knobloch, Boris, Guenthner, Jens
• Granted Patent: US 7,548,812 B2
• Time in Patent Office: Days
• US Class Current: 701/93
• CPC Class Codes: B60K 31/047 the memory being digital
• CPC Class Codes: B60W 2520/105 Longitudinal acceleration

Abstract

A method and a device for controlling the speed of a vehicle are described. In the transition from a dynamic to a steady-state operating state, the initially accepted setpoint value is corrected using a correcting value which depends on the system deviation prevailing at the time when the longitudinal acceleration of the vehicle has reached, exceeded, or fallen below a predetermined threshold value.

Claims

1-8. -8. (Canceled).

9. A method for controlling the speed of a vehicle having a vehicle speed controller, comprising:

controlling a drive motor of the vehicle as a function of a setpoint value for the vehicle speed and an actual vehicle speed; and

modifying the setpoint value for the vehicle speed using a modifying value that depends on a system deviation prevailing at a time when an acceleration of the vehicle has one of (i) equaled, (ii) exceeded, and (iii) fallen below a predetermined threshold value, while the vehicle speed controller is in a transition from a dynamic operating state to a steady-state operating state.

10. The method according to claim 9, wherein the dynamic operating state is one of an acceleration phase and a deceleration phase.

11. The method according to claim 10, wherein the vehicle speed present at the transition from the dynamic operating state to the steady-state operating state is specified as the setpoint value, and wherein the setpoint value is modified using the modifying value.

12. The method according to claim 11, wherein the transition from the dynamic operating state to the steady-state operating state is achieved by a driver performing one of (i) releasing a corresponding control key for the dynamic operating state and (ii) discontinuing a corresponding position of an operator control for the dynamic operating state.

13. The method according to claim 11, wherein the modifying value is an offset value that is added to the setpoint value in the case of an acceleration phase, and wherein the modifying value is an offset value that is subtracted from the setpoint value in the case of a deceleration phase.

14. The method according to claim 13, wherein the modifying value is limited to a maximum value.

15. The method according to claim 13, wherein the threshold value for the vehicle acceleration is determined from an acceleration value that was present in the transition from the dynamic operating state to the steady-state operating state.

16. A device for controlling the speed of a vehicle, comprising:

an arrangement configured to specify a setpoint value for a vehicle speed;

an arrangement configured to determine an actual vehicle speed;

a detector configured to detect a longitudinal acceleration of the vehicle;

an arrangement configured to control a drive motor of the vehicle as a function of a system deviation value derived from the setpoint value for the vehicle speed and the actual vehicle speed; and

an arrangement configured to modify, in a transition from a dynamic operating state to a steady-state operating state, the setpoint value for the vehicle speed using a modifying value that depends on the system deviation prevailing at a time when the acceleration of the vehicle has one of (i) equaled, (ii) exceeded, and (iii) fallen below a predetermined threshold value.