Diagnostics method for device for controlling a motor vehicle powered by an electric motor, and associated device

• US 9,864,664 B2
• Filed: 12/17/2012
• Issued: 01/09/2018
• Est. Priority Date: 12/21/2011
• Status: Active Grant

• Current Assignee: Vitesco Technologies GmbH (Continental AG)
• Original Assignee: Continental Automotive France (Continental AG), Continental Automotive GmbH (Continental AG)
• Inventors: Gonzalez, Alain, Pasquier, Jeremy, Vales, Stephan
• Primary Examiner(s): PATEL, SHARDUL D
• Application Number:
  US14/365,666
• Publication Number:
  US 20140343779A1
• Time in Patent Office: 1,849 Days
• Field of Search: 701 1, 701 22, 701 36
• CPC Class Codes: B60L 3/00 Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption methods or circuit arrangements for monitoring or controlling batteries or fuel cells B60L58/00
• CPC Class Codes: B60L 3/0084 relating to control modules
• CPC Class Codes: G06F 11/221 to test buses, lines or interfaces, e.g. stuck-at or open line faults
• CPC Class Codes: Y02T 90/16 Information or communication technologies improving the operation of electric vehicles

Abstract

A diagnostic method for a control device of a motor vehicle with an electric propulsion motor, including: an electronic control unit (500); a data communication bus (Tx; Rx) connecting at least the electronic control unit (500) and a controller of the electric motor; and a controller (510) of the data communication bus (Tx; Rx); includes the following steps:

• • the disabling of the controller (510) of the data communication bus (Tx; Rx) by the electronic control unit (500),
  • the transmission by the electronic control unit of a signal frame on the data communication bus (Tx; Rx),
  • the reading by the electronic control unit of the signals traveling along the data communication bus (Tx; Rx), and
  • the issue of the positive safety diagnosis if the signal frame is not read by the electronic control unit.

Claims

1. A method comprising:

A diagnostic method for a control device of a motor vehicle with an electric propulsion motor, comprising;

an electronic control unit, a data communication bus for communication between at least the electronic control unit and a control driver of the electric motor, a control driver of the data communication bus, including the following steps;

inhibiting the control driver of the data communication bus for communication by the electronic control unit, emitting by the electronic control unit of a signal frame on the data communication bus for communication which does not correspond to a standard frame of the protocol of the data communication bus for communication, reading by the electronic control unit of the signals traveling along the data communication bus for communication, and setting up a positive safety diagnosis if the signal frame is not read by the electronic control unit.

2. The method according to claim 1, wherein the signal frame is limited to a test bit.