Dual-ECU Accelerator Pedal Control for Fault-Tolerant Driving
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Solution Overview
Problem
Conventional vehicle control systems face reliability issues when the electronic control unit (ECU) for the accelerator pedal position sensor fails, leading to impaired vehicle functionality.
Innovation Solution
A driving control system with a dual ECU configuration, where a position sensor is connected to two ECUs through separate signal transmission circuits, allowing one ECU to take over control if the other fails.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single ECU is used to control the accelerator pedal position, then the device complexity is reduced, but the reliability deteriorates because the vehicle cannot operate normally when the ECU is faulty
Solution Approach 1:
The control system is segmented into two independent ECUs (first ECU and second ECU), each capable of independently receiving accelerator pedal position signals and controlling vehicle power output. This segmentation allows the system to maintain functionality even if one ECU fails, thereby improving reliability while managing complexity through modular design
Solution Approach 2:
The system changes the redundancy parameter from 0 to 1 by adding a backup ECU. When the first ECU is faulty, the system automatically switches to using the second ECU, changing the operational state from single-point control to redundant control, thereby maintaining vehicle operability and improving reliability
2Reliability
If redundant ECUs are added to improve reliability, then the reliability improves, but the device complexity increases due to additional components and signal transmission circuits
Solution Approach 1:
The position sensor serves multiple functions by connecting to both the first ECU and the second ECU through separate signal transmission circuits. This multi-functional configuration allows the same sensor to provide data to multiple control units, enabling redundancy without requiring additional sensors, thereby improving reliability while limiting the increase in overall system complexity
Solution Approach 2:
The system pre-configures dual signal transmission circuits and dual ECUs before any fault occurs. The redundant pathways are established in advance, so when a fault is detected in one ECU, the system can immediately switch to the other ECU without requiring complex real-time decision logic or additional circuitry, thus improving reliability while keeping the added complexity manageable
Data Source
AI summary
The present disclosure provides a driving control system, a driving control method, and a related apparatus, and relates to the field of vehicle technologies. The driving control system includes an accelerator pedal position detection unit, a first electronic control unit, and a second electronic control unit. The accelerator pedal position detection unit includes a position sensor, a first signal transmission circuit, and a second signal transmission circuit. The position sensor can output a position signal to the first electronic control unit and the second electronic control unit through the first signal transmission circuit and the second signal transmission circuit respectively.