Control system for at least one electric motor, usable as a generator, of a vehicle; and braking system for a vehicle

Patent metadata

Field	Value
Publication number	US-9840148-B2
Application number	US-201514885560-A
Country	US
Kind code	B2
Filing date	Oct 16, 2015
Priority date	Oct 16, 2014
Publication date	Dec 12, 2017
Grant date	Dec 12, 2017

Abstract

A control system for an electric motor usable as a generator of a vehicle includes: a first control device and a second control device each configured to define, in consideration of at least one furnished first specification signal with regard to a driver-requested or autonomously requested braking input, at least one target braking torque variable with regard to at least one generator braking torque to be exerted by way of the at least one electric motor on at least one wheel of the vehicle and/or on at least one axle of the vehicle, and to output to the at least one electric motor, and/or to at least one electronic control system of the at least one electric motor, at least one output signal corresponding to the at least one target braking torque variable.

First claim

What is claimed is:

1. A control system for at least one electric motor usable as a generator of a vehicle, comprising:
a first control device configured to define, in consideration of at least one furnished first specification signal with regard to one of a driver-requested or autonomously requested braking input, at least one target braking torque variable with regard to at least one generator braking torque to be exerted by way of the at least one electric motor on at least one of (i) at least one wheel of the vehicle and (ii) at least one axle of the vehicle; and the first control device is further configured to output at least one output signal corresponding to the at least one target braking torque variable to at least one of (i) the at least one electric motor and (ii) at least one electronic control system of the at least one electric motor; and
a second control device configured to define, at least in the case of a functional failure of the first control device, the at least one target braking torque variable in consideration of at least one of the at least one furnished first specification signal and at least one furnished second specification signal with regard to one of the driver-requested or autonomously requested braking input, and to output the at least one corresponding output signal to at least one of (i) the at least one electric motor, and (ii) the at least one electronic control system of the at least one electric motor.

2. The control system as recited in claim 1 , wherein the first control device is additionally configured to apply control to at least one hydraulic component of the braking system.

3. The control system as recited in claim 1 , wherein the first control device has a master status and the second control device has a slave status.

4. The control system as recited in claim 1 , wherein at least the first control device is configured to define the at least one target braking torque variable in additional consideration of at least one furnished first wheel rotation speed signal with regard to at least one wheel rotation speed of the at least one wheel of the vehicle.

5. The control system as recited in claim 4 , wherein the second control device is configured to define the at least one target braking torque variable in additional consideration of at least one of the at least one furnished first wheel rotation speed signal and at least one furnished second wheel rotation speed signal with regard to the at least one wheel rotation speed of the at least one wheel of the vehicle.

6. The control system as recited in claim 4 , wherein the first control device is integrated into a first microcontroller, and the second control device is integrated into a second microcontroller.

7. The control system as recited in claim 6 , wherein the first microcontroller and the second microcontroller are integrated into one circuit board.

8. The control system as recited in claim 6 , wherein the first microcontroller having the integrated first control device and the second microcontroller having the integrated second control device are connected to one another via an internal interconnection.

9. The control system as recited in claim 4 , wherein the first control device is connected to a first energy supply apparatus and the second control device is connected to a second energy supply apparatus.

10. The control system as recited in claim 9 , wherein the first control device is connected to a vehicle battery constituting the first energy supply apparatus and the second control device is connected to a high-voltage source constituting the second energy supply apparatus.

11. The control system as recited in claim 10 , wherein the second control device is connected to the second energy supply apparatus via a DC voltage converter integrated into the second control device.

12. A braking system for a vehicle, comprising:
a control system of a least one electric motor usable as a generator of the vehicle, the control system including:
a first control device configured to define, in consideration of at least one furnished first specification signal with regard to one of a driver-requested or autonomously requested braking input, at least one target braking torque variable with regard to at least one generator braking torque to be exerted by way of the at least one electric motor on at least one of (i) at least one wheel of the vehicle and (ii) at least one axle of the vehicle, and the first control device is further configured to output at least one output signal corresponding to the at least one target braking torque variable to at least one of (i) the at least one electric motor and (ii) at least one electronic control system of the at least one electric motor; and

a second control device configured to define, at least in the case of a functional failure of the first control device, the at least one target braking torque variable in consideration of at least one of the at least one furnished first specification signal and at least one furnished second specification signal with regard to one of the driver-requested or autonomously requested braking input, and to output the at least one corresponding output signal to at least one of (i) the at least one electric motor, and (ii) the at least one electronic control system of the at least one electric motor.

13. The braking system as recited in claim 12 , further comprising:
at least one sensor configured to (i) output to the first control device the at least one first specification signal with regard to the driver-requested braking input, and (ii) output to the second control device the at least one second specification signal with regard to the driver-requested braking input, the at least one sensor having a first sensor chip with which the at least one first specification signal is output and a second sensor chip with which the at least one second specification signal is output.

14. The braking system as recited in claim 12 , further comprising:
at least one first sensor outputting to the first control device the at least one first specification signal with regard to the driver-requested braking input; and
at least one second sensor outputting to the second control device the at least one second specification signal with regard to the driver-requested braking input.

Assignees

• Bosch Gmbh Robert

Inventors

• Kistner Matthias
• Bussmann Otmar
• Foitzik Bertram
• Bauer Urs
• Ellwein Rolf
• Kaster Robert

Classifications

• B60T13/586

  the retarders being of the electric type · CPC title

• B60T13/66 Primary

  Electrical control in fluid-pressure brake systems · CPC title

• B60T13/662

  characterised by specified functions of the control system components · CPC title

• Y02T10/72

  Electric energy management in electromobility · CPC title

• B60L7/26 Primary

  Controlling the braking effect · CPC title