Motor Control Unit Signaling for Faster Vehicle Stability Torque Control
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Solution Overview
Problem
Existing vehicle control systems face challenges in quickly and accurately responding to acceleration and deceleration requirements, particularly in harsh conditions such as icy or snowy roads, leading to increased slipping probability due to prolonged torque control times.
Innovation Solution
Establish communication between a vehicle control unit and a motor control unit to facilitate faster torque adjustments based on signals from the electronic stability program, including torque saturation states and vehicle status parameters, enabling rapid stability control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the ESP system determines slipping status and calculates torque through the traditional communication path (ESP→VCU→MCU), then the vehicle maintains stability control, but the control time is prolonged and slipping probability increases on harsh road surfaces
Solution Approach 1:
The patent segments the traditional centralized control architecture (ESP→VCU→MCU) into distributed control units (front axle control unit and rear axle control unit) that can independently process torque control signals. This segmentation enables parallel processing of torque adjustments for different axles, reducing overall control time while maintaining stability control reliability.
Solution Approach 2:
The patent implements preliminary action by having control units pre-process torque saturation states and vehicle status parameters locally. When slipping is detected, the control units can immediately adjust torque without waiting for sequential processing through multiple communication hops, thereby reducing control time while ensuring reliable stability control.
2Ease of operation
If the VCU arbitrates torque requests and sends commands to the MCU, then torque control is coordinated, but the communication delays reduce vehicle maneuverability in extreme scenarios
Solution Approach 1:
The patent applies dynamics by enabling control units to dynamically switch between different control modes based on real-time vehicle status. In normal conditions, coordinated torque arbitration is performed; in extreme scenarios, control units can independently execute torque adjustments without waiting for arbitration, thereby improving response speed while maintaining operational coordination.
Solution Approach 2:
The patent introduces communication interfaces as intermediaries that enable direct signal transmission between control units and motor control units. This intermediary layer facilitates faster communication by establishing dedicated signal paths that bypass traditional multi-hop communication routes, improving control response speed without compromising coordinated torque control.
Data Source
AI summary
A vehicle control unit, a motor control unit and a related device. The motor control unit sends a first signal to the vehicle control unit. The motor control unit is connected to the motor control unit or the vehicle control unit and sends a second signal. The vehicle control unit is configured to send a third signal to the motor control unit. Before receiving the second signal, the vehicle control unit generates the third signal by using the first signal, and sends the third signal to any one or more of at least one motor control unit, so that the motor control unit that receives the third signal adjusts torque, to perform stability control on a vehicle. In this way, a slip rate of the vehicle on a slippery road surface can be reduced.