Electronic Brake CAN Redundancy With Wheel-End Termination
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing electronic mechanical brake systems face communication failures between main control units and wheel control units due to physical damage or deformation, leading to loss of termination resistance functionality and inability to transmit backup braking commands.
Innovation Solution
Incorporating termination resistances into each wheel control unit within the first and second local CANs to ensure stable communication channels, forming a primary and backup communication network between the main control unit and wheel control units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a main control unit experiences physical damage, then the termination resistance function is lost, but this should not affect the backup control unit's ability to communicate
Solution Approach 1:
The patent pre-configures termination resistances in wheel control units before any failure occurs. These resistances are ready to be activated immediately when a main control unit fails, eliminating the need for reconfiguration or manual intervention and ensuring continuous communication stability
Solution Approach 2:
The patent enables dynamic activation of termination resistances in wheel control units based on the operational status of main control units. When a main control unit fails, the system changes the electrical parameter state by activating the previously dormant termination resistances in wheel control units to maintain proper CAN bus termination
Data Source
AI summary
An apparatus for communication for use in an electronic mechanical brake system for braking a vehicle by using electronic mechanical brakes respectively disposed on a left front wheel disposed on the front left side of the vehicle, a right front wheel disposed on the front right side of the vehicle, a left rear wheel disposed on the rear left side of the vehicle, and a right rear wheel disposed on the rear right side of the vehicle, comprising: a main control unit for controlling braking of the vehicle by transmitting a braking command to each of the electronic mechanical brakes; a wheel control unit disposed on each of the electronic mechanical brakes; a first local CAN forming a communication channel through which braking commands are transmitted and received between the main control unit and the wheel control unit; and a second local CAN forming a communication channel between the main control unit and the wheel control unit to secure communication redundancy of the vehicle with the first local CAN.