Physical gear acquisition system and acquisition method for pure electric light commercial vehicle

A collection system, a pure electric technology, applied to vehicle components, circuits or fluid pipelines, transportation and packaging, etc., can solve problems such as the inability to guarantee the normal driving of vehicles, and achieve increased hardware costs, improved reliability, and simple circuit principles Effect

Active Publication Date: 2020-09-15
DONGFENG AUTOMOBILE COMPANY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method of collecting physical gear positions only through the CAN bus cannot guarantee the normal driving of the vehicle when the communication between the VCU and the electronic shifter fails.

Method used

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  • Physical gear acquisition system and acquisition method for pure electric light commercial vehicle
  • Physical gear acquisition system and acquisition method for pure electric light commercial vehicle
  • Physical gear acquisition system and acquisition method for pure electric light commercial vehicle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] see Figure 1-Figure 4 , a pure electric light commercial vehicle physical gear acquisition system, comprising a vehicle controller 1, an electronic shifter 2, the vehicle controller 1 is connected to the electronic shifter 2 through a CAN bus 3; The vehicle controller 1 is provided with a No. 1 I / O input port 11 and a No. 2 I / O input port 12, and the electronic shifter 2 is provided with a No. 1 I / O output port 21 and a No. 2 I / O output port 22 , the No. 1 I / O output port 21 is connected to the No. 1 I / O input port 11, the No. 2 I / O output port 22 is connected to the No. 2 I / O input port 12 through hard wire 4, and the electronic shifter The signal input port of 2 is connected to the analog voltage output module 5 of the Hall sensor, and the analog voltage output module 5 of the Hall sensor is used to convert the rotation angle and displacement signal of the electronic shifter knob switch into an analog voltage signal and then transmit it For the electronic shifter 2,...

Embodiment 2

[0061] The difference with Example 1 is:

[0062] The method also includes the step of the electronic shifter 2 judging the real-time physical gear position according to four groups of analog voltage signals from the analog voltage output module 5 of the Hall sensor, the step is:

[0063] The electronic shifter 2 generates a logic level combination according to the analog voltage signal. If the generated logic level combination is [01 1 0], it is determined that the real-time physical gear is the D gear; if it is [0 1 0 1], Then it is judged that the real-time physical gear is the N gear; if it is [1 01 0], then it is judged that the real-time physical gear is the R gear; It is: if a certain group of analog voltage signals received is greater than or equal to K1*battery voltage V, and lasts for X1ms, a high level 1 is generated; if a certain group of analog voltage signals received is less than or equal to K2*battery voltage V, and lasts for X2ms , then a low level 0 is gener...

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PUM

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Abstract

The invention discloses a physical gear acquisition system for a pure electric light commercial vehicle. The system comprises a vehicle control unit and an electronic gear shifter connected with the vehicle control unit through a CAN bus; the vehicle control unit is connected with a first I/O output port hard wire and a second I/O output port hard wire through a first I/O input port and a second I/O input port respectively, wherein the first I/O output port hard wire and the second I/O output port hard wire are arranged on the electronic gear shifter; the electronic gear shifter is used for judging a real-time physical gear according to an analog voltage signal and then transmitting the real-time physical gear to the vehicle control unit through the CAN bus and the hard wires; and the vehicle control unit is used for carrying out open circuit, to-ground short circuit and to-power supply short circuit fault diagnosis on the first I/O input port and the second I/O input port through thereal-time physical gear signal transmitted by the CAN bus when communication with the electronic gear shifter is normal, and determining an output physical gear according to fault diagnosis information and the real-time physical gear signal transmitted by the hard wire when the communication with the electronic gear shifter fails. With the physical gear acquisition system adopted, the normal running of a vehicle in the case of communication failure is ensured. The physical gear acquisition system has the advantages of structural simplicity and easiness in implementation.

Description

technical field [0001] The invention belongs to the technical field of automobile control, and in particular relates to a physical gear acquisition system and acquisition method of a pure electric light commercial vehicle. Background technique [0002] With the electronic development of new energy vehicles, smart cars and traditional power vehicle shift control systems, more and more vehicles use electronic shifters. The main function of the electronic shifter is to accept the driver's shifting demand, convert the driver's shifting operation action into electrical signals through the position sensor, etc., and the electronic shifter EGSM receives these electrical signals, and recognizes them as Different shift position signals are encoded, and then output to the vehicle controller VCU through the CAN bus, so that the VCU can collect physical gear information. This method of collecting physical gear positions only through the CAN bus cannot guarantee the normal driving of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60R16/023
CPCB60R16/0232
Inventor 何正伟郑杭林凌郭启翔白鹃
Owner DONGFENG AUTOMOBILE COMPANY
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