Vehicle speed signal selection method and vehicle speed signal adjustment verification method

Patent metadata

Field	Value
Publication number	US-9789879-B2
Application number	US-201514717097-A
Country	US
Kind code	B2
Filing date	May 20, 2015
Priority date	Nov 20, 2014
Publication date	Oct 17, 2017
Grant date	Oct 17, 2017

Abstract

A vehicle speed signal adjustment verification method may include an accelerator and vehicle speed change measuring step to obtain a change of an accelerator pedal sensor and a vehicle speed change calculated by an engine control unit, a change comparing step to determine whether the change of the vehicle speed calculated by the engine control unit is within a predetermined range as compared with the change of the accelerator pedal sensor, and a vehicle speed signal changing step to change a vehicle speed signal inputted into the engine control unit, if it is determined that the change of the vehicle speed calculated by the engine control unit is not within the predetermined range as compared with the change of the accelerator pedal sensor.

First claim

What is claimed is:

1. A vehicle speed signal selection method, comprising:
determining, in a communication checking step, whether all control units of a vehicle receive a communication message, and an engine control unit receives the communication message from an ABS control unit;
determining, in a wheel speed sensor checking step, whether the engine control unit receives a vehicle speed signal of a wheel speed sensor from the wheel speed sensor, when it is determined that all the control units of the vehicle do not receive the communication message or the engine control unit does not receive the communication message from the ABS control unit;
determining, in an emission regulation checking step, whether the engine control unit is meant for receiving the vehicle speed signal of the wheel speed sensor from the wheel speed sensor, when it is determined that the engine control unit does not receive the vehicle speed signal of the wheel speed sensor; and
determining, in a transmission checking step, whether the vehicle is an automatic transmission vehicle, when it is determined that the engine control unit is not meant for receiving the vehicle speed signal of the wheel speed sensor.

2. The method of claim 1 , further comprising:
performing an ABS speed data receiving step wherein the engine control unit receives a vehicle speed signal of the ABS control unit from the ABS control unit, when it is determined in the communication checking step that all the control units of the vehicle receive the communication message, and the engine control unit receives the communication message from the ABS control unit.

3. The method of claim 1 , further comprising:
performing a wheel speed data receiving step wherein the engine control unit receives the vehicle speed signal of the wheel speed sensor from the wheel speed sensor, when it is determined in the wheel speed sensor checking step that the engine control unit receives the vehicle speed signal of the wheel speed sensor from the wheel speed sensor.

4. The method of claim 1 , further comprising:
performing a wiring error display step to generate a wiring error signal of the wheel speed sensor, when it is determined in the emission regulation checking step that the engine control unit is meant for receiving the vehicle speed signal of the wheel speed sensor.

5. The method of claim 1 , further comprising:
performing a transmission data receiving step wherein the engine control unit receives a vehicle speed signal of the transmission control unit from the transmission control unit, when it is determined in the transmission checking step that the vehicle is the automatic transmission vehicle.

6. The method of claim 1 , further comprising;
performing a vehicle speed data receiving step wherein the engine control unit receives the vehicle speed signal of the vehicle speed sensor from the vehicle speed sensor, when it is determined in the transmission checking step that the vehicle is not the automatic transmission vehicle.

7. The method of claim 2 , wherein in the ABS speed data receiving step, the engine control unit receives the vehicle speed signal of the wheel speed sensor from the ABS control unit through a digital input unit of the engine control unit.

8. The method of claim 3 , wherein in the wheel speed data receiving step, the engine control unit receives the vehicle speed signal of the wheel speed sensor from the wheel speed sensor through an analog input unit of the engine control unit.

9. The method of claim 5 , wherein in the transmission data receiving step, the engine control unit receives the vehicle speed signal of the transmission control unit from the transmission control unit through the digital input unit of the engine control unit.

10. The method of claim 6 , wherein in the vehicle speed data receiving step, the engine control unit receives the vehicle speed signal of the vehicle speed sensor from the vehicle speed sensor through the digital input unit of the engine control unit.

Assignees

• Hyundai Motor Co Ltd
• Kia Motors Corp

Inventors

• Seo Yoo-Jin

Classifications

• B60W50/0205 Primary

  Diagnosing or detecting failures; Failure detection models · CPC title

• B60W2520/10

  Longitudinal speed · CPC title

• B60W2520/28

  Wheel speed · CPC title

• B60W2050/0045

  using databus protocols · CPC title

• H04L2012/40215

  Controller Area Network CAN · CPC title