REDUNDANT HARDWARE ARCHITECTURE FOR THE CONTROL SIGNAL STAGE OF THE BRAKING SYSTEM OF A VEHICLE IN WHICH EACH OF THE WHEELS ARE CONNECTED TO AT LEAST ONE ROTARY ELECTRICAL MACHINE

• US 20090234525A1
• Filed: 06/15/2007
• Published: 09/17/2009
• Est. Priority Date: 06/26/2006
• Status: Active Grant

• Current Assignee: Michelin Recherche et Technique SA (Compagnie Generale DES Etablissements Michelin SCA)
• Original Assignee: Michelin Recherche et Technique SA (Compagnie Generale DES Etablissements Michelin SCA)
• Inventors: Bourqui, Gerard, Linda, Jean-Louis, Cudre-Mauroux, Fabrice
• Granted Patent: US 8,634,990 B2
• Time in Patent Office: Days
• US Class Current: 701/22
• CPC Class Codes: B60L 2200/26 Rail vehicles
• CPC Class Codes: B60L 2260/28 Four wheel or all wheel drive
• CPC Class Codes: B60L 3/0023 Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
• CPC Class Codes: B60L 7/00 Electrodynamic brake systems for vehicles in general
• CPC Class Codes: B60L 7/006 Dynamic electric braking by reversing current, i.e. plugging

Abstract

An electric braking system is provided for a road vehicle that includes at least one wheel connected for rotation to at least one rotary electric machine. At least one electronic wheel control module controls an electric machine of a corresponding wheel, The electric braking system includes: a central unit (3) for ensuring management of a vehicle displacement, the central unit controlling the at least one electronic wheel control module (23); a braking control available to a driver, the braking control being connected mechanically to at least: a first sensor (C1) outputting a vehicle braking control signal having a given amplitude representing a total braking force desired for the vehicle, and a second sensor (C2) outputting a vehicle braking control signal having a given amplitude representing the total braking force desired for the vehicle. The first sensor (C1) outputs its control signal to the central unit (3) and the second sensor (C2) outputs its control signal to one or each of the at least one electronic wheel control module (23).

Claims

1. An electric braking system for a road vehicle that includes:

at least one wheel connected for rotation to at least one rotary electric machine, and at least one electronic wheel control module (23) each controlling an electric machine of a corresponding wheel, the electric braking system comprising;

a central unit (3) for ensuring management of a vehicle displacement, the central unit controlling each electronic wheel control module (23);

a braking control available to a driver, the braking control being connected mechanically to at least;

a first sensor (C1) outputting a vehicle braking control signal having a given amplitude representing a total braking force desired for the vehicle, and a second sensor (C2) outputting a vehicle braking control signal having a given amplitude representing the total braking force desired for the vehicle,

wherein the first sensor (C1) outputs its control signal to the central unit (3) and the second sensor (C2) outputs its control signal to one or each of the at least one electronic wheel control module (23).

2. A system according to claim 1, further comprising at least two sub-systems (A and B), each of the at least two sub-systems including:

the at least one electronic wheel control module (23);

a low-voltage electrical supply stage for supplying electronics controlling and driving power elements, the low-voltage electrical supply stage including a first supply and at least one second supply, the first supply and the at least one second supply being interconnected by an electric line (43) that includes a first section (43A) and a second section (43B), the first and second sections being connected by a device (430) that electrically separates the first and second sections, and being configured to interrupt an interconnection on demand in an event of one of the first and second sections experiencing an undervoltage or an overcurrent, the first sensor (C1) being supplied by a same section as the central unit (3), and the second sensor (C2) being supplied both by a first wheel control electronics (23) of one of the at least two sub-systems (A) and by a second wheel control electronics (23) of the other of the at least two sub-systems (B) via a pair of diodes isolating supplies from the first and second wheel control electronics.

3. A system according to claim 2, further comprising at least one electronic dissipation module (60) for each of the at least two sub-systems (A, B), one (A) of the electronic dissipation modules (60) being supplied by the first section (43A) and the other (B) of the electronic dissipation modules (60) being supplied by the second section (43B).

4. A system according to claim 2, wherein the first supply is a battery (42).

5. A system according to claim 2, further comprising a central electric line (40), wherein one of the at least one second supply includes a voltage converter (41) connected to the central electric line (40).

6. A vehicle braking system according to claim 2, wherein the vehicle includes four wheels each connected for rotation to at least one rotary electric machine (2) specific thereto, and wherein each of the at least two sub-systems includes two of the four wheels.

7. A vehicle braking system according to claim 2, wherein each of the at least two sub-system groups together the wheels of the vehicle disposed diagonally at opposite corners of the vehicle.

8. A system according to claim 2, wherein the central unit (3) is supplied by both the first section and the second section via a pair of diodes isolating the first and second sections.

9. A system according to claim 3, wherein at least one of the electronic dissipation modules (60) is associated with a dissipator.

10. A system according to claim 9, wherein the vehicle has a mass of M kg, and wherein the dissipator is of a power greater than 250*M/1000 kW per sub-system.