Power Seat LIN Control for Reduced Wiring and CAN Fault Tolerance
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Solution Overview
Problem
The existing power seat control systems face challenges with increased volume and complexity due to multiple motors and extensive wiring, and are prone to interworking issues when CAN communication abnormalities occur, requiring a more efficient and space-effective control method.
Innovation Solution
A power seat integrated control method using a single integrated controller connected to multiple power seats via a LIN communication bus, which transmits driving information to motor controllers independently of the main CAN communication bus, allowing for normal interworking operations even during CAN bus abnormalities and enabling specification changes without replacing motor modules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a higher-level controller is separately provided for each power seat to control multiple motors, then the control precision and reliability of each seat is improved, but the volume of the controller and the complexity of the wire harness increase significantly
Solution Approach 1:
The patent merges multiple higher-level controllers into a single integrated controller that controls all power seats. This integrated controller consolidates the control functions that were previously distributed across multiple separate controllers, thereby reducing wire harness complexity while maintaining control reliability through centralized management of all seat motors.
Solution Approach 2:
The integrated controller performs multiple control functions for different power seats simultaneously. Instead of requiring dedicated controllers for each seat, the single integrated controller universally manages all seat adjustments, reducing the overall system complexity while maintaining the reliability needed for each individual seat's control requirements.
2Measurement precision
If a higher-level controller is provided for each power seat with multiple motors, then the control precision of each motor is improved, but the volume of the controller increases requiring more installation space
Solution Approach 1:
The patent combines multiple separate higher-level controllers into one integrated controller, consolidating their volumes into a single unit. This integration maintains the precision control capabilities needed for each motor while reducing the total volume occupied by controller hardware, as the integrated design shares common control resources and processing units.
3Reliability
If separate higher-level controllers are used for each power seat, then the independence and reliability of each seat control is improved, but the interworking operation between seats fails when CAN communication abnormalities occur
Solution Approach 1:
The patent merges the control functions into a single integrated controller that manages all power seats, eliminating the need for inter-controller CAN communication. This centralized approach maintains control independence through internal resource allocation while ensuring interworking capability by having all seats controlled by the same controller, thus avoiding CAN communication failures.
4Adaptability or versatility
If the number of motors in the power seat is increased to provide more functions, then the functionality and convenience are improved, but the volume of the wire harness and controller increases
Solution Approach 1:
The integrated controller consolidates the control of multiple motors into a single device, reducing wire harness volume by eliminating redundant control lines. The integrated design efficiently manages multiple motor functions through shared communication channels and control resources, allowing enhanced seat functionality without proportional increases in wire harness complexity.
Solution Approach 2:
The integrated controller provides universal control capabilities for multiple motors and seat functions. This multi-functional controller handles various seat adjustments (reclining, cushion angle, headrest, leg rest) through a single control unit, reducing the need for separate control circuits for each function and thereby reducing overall wire harness volume.
Data Source
AI summary
The present disclosure relates to a power seat integrated control method. One embodiment of the present disclosure includes: a signal input step of receiving a power seat operation signal input that a user inputs through an interface of a vehicle; a determination step of determining an operating condition for operating a motor module that is built into the power seat and moves a specific area of the power seat; and an information transmission step of transmitting driving information for controlling the motor module in accordance with a type of the operation signal. The motor module includes a driving motor and a motor controller which controls the driving motor, and one LIN communication bus is provided between the integrated controller and each power seat. In the information transmission step, the integrated controller transmits the driving information to the motor controller through the LIN communication bus.