Method for operating a motor vehicle

• US 20050010335A1
• Filed: 06/25/2004
• Published: 01/13/2005
• Est. Priority Date: 06/26/2003
• Status: Active Grant

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Wendt, Hauke, Saile, Juergen, Schopf, Ulrich, Kettenacker, Guenter
• Granted Patent: US 7,225,059 B2
• Time in Patent Office: Days
• US Class Current: 701/1
• CPC Class Codes: B60K 31/00 Vehicle fittings, acting on a single sub-unit only, for automatically controlling vehicle speed, i.e. preventing speed from exceeding an arbitrarily established velocity or maintaining speed at a particular velocity, as selected by the vehicle operator fittings acting on two or more sub-units B60W30/14; speedometers G01P; systems or devices for controlling speed in general G05D13/00 ; in traffic anti-collision system for road vehicles G08G1/16
• CPC Class Codes: B60K 31/0008 including means for detecting potential obstacles in vehicle path
• CPC Class Codes: B60T 1/062 acting on transmission parts
• CPC Class Codes: F02D 13/0203 Variable control of intake and exhaust valves
• CPC Class Codes: F02D 13/04 using engine as brake
• CPC Class Codes: F02D 2009/024 Increasing intake vacuum
• CPC Class Codes: F02D 2013/005 of throttleless spark ignited engines
• CPC Class Codes: F02D 2250/18 Control of the engine output torque
• CPC Class Codes: F02D 29/02 peculiar to engines driving vehicles; peculiar to engines driving variable pitch propellers
• CPC Class Codes: F02D 41/12 for deceleration F02D41/0005, F02D41/107 take precedence

Abstract

In a method for operating a vehicle having a drive, a value of an internal torque to be supplied by the drive is determined from a positive propulsion torque requested by a user or a control and/or regulating system and the drive is triggered accordingly. Furthermore, the drive may supply a negative propulsion torque. A value of a negative propulsion torque requested by the user or by the control and/or regulating system is determined and then used to determine a value of a corresponding negative internal torque to be supplied by the drive and the drive may be triggered accordingly.

Claims

1. A method for operating a motor vehicle having a drive capable of supplying a negative propulsion torque, comprising:

determining a value of an internal torque that is to be supplied by the drive, the value being determined from a positive propulsion torque requested by a user and by a control and/or regulating system, the drive being triggered accordingly;

determining a value of a negative propulsion torque requested by one of the user and by the control and/or regulating system; and

determining from the value of the negative propulsion torque a value of a corresponding negative internal torque to be made available by the drive, the drive being triggered accordingly.

2. The method as recited in claim 1, further comprising:

determining a value of a maximum negative propulsion torque;

setting the value of the negative propulsion torque in a ratio to the value of the maximum negative propulsion torque.

3. The method as recited in claim 2, wherein:

the value of the maximum negative propulsion torque depends on an instantaneous operating condition of at least one of the drive and the motor vehicle.

4. The method as recited in claim 1, further comprising:

transmitting the determined value of the negative internal torque to at least one processing unit that, as a function thereof, generates a value of a triggering signal for an actuator.

5. The method as recited in claims 2, wherein:

the value of the maximum negative propulsion torque is determined in a processing unit.

6. The method as recited in claim 4, further comprising:

sending to the at least one processing unit information regarding which device has requested a negative propulsion torque.

7. The method as recited in claim 1, wherein:

the determined value of the negative internal torque is sent only to a certain processing unit.

8. The method as recited in claim 1, wherein:

the negative internal torque of an internal combustion engine is made available by at least one of a decompression valve brake, a throttle valve brake, and a hydraulic retarder.

9. The method as recited in claim 1, wherein:

the negative internal torque supplied is infinitely adjustable.

10. The method as recited in claim 1, wherein:

a transition from the negative internal torque to the positive propulsion torque takes place gradually.

11. The method as recited in claim 1, wherein:

when a negative and a positive propulsion torque are requested at the same time, either a requested positive propulsion torque is not taken into account;

or the positive requested propulsion torque is taken into account if immediately before that a positive propulsion torque had also been requested, and the negative requested propulsion torque is taken into account when immediately before a negative propulsion torque had also been requested;

or a requested negative propulsion torque is not taken into account.

12. The method as recited in claim 1, wherein:

when a negative propulsion torque is requested by a manual operating device, the value of the requested propulsion torque is formed from the minimum of the values determined for the propulsion torque from a position of an accelerator pedal and a control signal of a cruise control.

13. The method as recited in claim 1, wherein:

when a negative propulsion torque is not requested by a manual operating device and an accelerator pedal is operated, the value of the requested propulsion torque is formed from the maximum of the values determined for the propulsion torque from a position of the accelerator pedal and a control signal of a cruise control.

14. The method as recited in claim 1, wherein:

when a negative propulsion torque is not requested by a manual operating device and an accelerator pedal is not operated, the value of the requested propulsion torque corresponds to the value determined for the propulsion torque from the control signal of a cruise control.

15. A computer program containing instructions that when executed results in a performance of the following:

determining a value of an internal torque that is to be supplied by the drive, the value being determined from a positive propulsion torque requested by a user and by a control and/or regulating system, the drive being triggered accordingly;

determining a value of a negative propulsion torque requested by one of the user and by the control and/or regulating system; and

determining from the value of the negative propulsion torque a value of a corresponding negative internal torque to be made available by the drive, the drive being triggered accordingly.

16. An electric memory medium for a control and/or regulating device of a motor vehicle, the electric memory medium storing a computer program containing instructions that when executed results in a performance of the following:

determining a value of an internal torque that is to be supplied by the drive, the value being determined from a positive propulsion torque requested by a user and by a control and/or regulating system, the drive being triggered accordingly;

determining a value of a negative propulsion torque requested by one of the user and by the control and/or regulating system; and

determining from the value of the negative propulsion torque a value of a corresponding negative internal torque to be made available by the drive, the drive being triggered accordingly.

17. A control and/or regulating device for a motor vehicle, the control and/or regulating device being programmed to perform the method of:

determining a value of an internal torque that is to be supplied by the drive, the value being determined from a positive propulsion torque requested by a user and by a control and/or regulating system, the drive being triggered accordingly;

determining a value of a negative propulsion torque requested by one of the user and by the control and/or regulating system; and

determining from the value of the negative propulsion torque a value of a corresponding negative internal torque to be made available by the drive, the drive being triggered accordingly.

18. A motor vehicle, comprising:

control and/or regulating device for a motor vehicle, the control and/or regulating device being programmed to perform the method of;

determining a value of an internal torque that is to be supplied by the drive, the value being determined from a positive propulsion torque requested by a user and by a control and/or regulating system, the drive being triggered accordingly;

determining a value of a negative propulsion torque requested by one of the user and by the control and/or regulating system; and

determining from the value of the negative propulsion torque a value of a corresponding negative internal torque to be made available by the drive, the drive being triggered accordingly.