Vehicle MCU Failure Backup Circuit Using Ignition Coil Voltage
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Solution Overview
Problem
In automobile systems, MCU circuit failures due to environmental factors like high temperature, high humidity, and electromagnetic interference can lead to system paralysis and compromised safety functions, affecting driving safety.
Innovation Solution
A circuit and method that includes a failure state detector, a maintaining voltage signal generator, and a driving maintainer to convert ignition coil voltage into a failure maintaining voltage signal, which is output to driving controllers to maintain normal operation of vehicle loads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If the MCU circuit is used for driving control in vehicle systems, then the functional capabilities and automation level are improved, but the system reliability deteriorates due to susceptibility to high temperature, high humidity, electromagnetic interference and other environmental factors causing circuit failure
Solution Approach 1:
The patent implements preliminary action by detecting MCU failure states before complete system paralysis occurs. The failure state detector continuously monitors MCU operational status and triggers the maintaining voltage signal generator to activate backup control mechanisms proactively, preventing total system failure rather than reacting after damage occurs.
Solution Approach 2:
The patent applies beforehand cushioning by creating a protective backup system that cushions against MCU failure. The maintaining voltage signal generator and driving maintainer constitute a pre-prepared safety mechanism that activates when MCU failure is detected, providing a buffer that prevents complete system collapse and maintains essential vehicle functions.
2Adaptability or versatility
If the MCU circuit operates in harsh environmental conditions (high temperature, high humidity, electromagnetic interference), then the vehicle can function in diverse conditions, but the circuit stability and reliability worsen due to environmental stress causing abnormality or breakage
Solution Approach 1:
The patent implements feedback by having the failure state detector continuously monitor MCU status and feed this information back to the maintaining voltage signal generator. This closed-loop feedback mechanism enables real-time detection of environmental stress effects and automatic activation of backup control, allowing the system to adapt to harsh conditions while maintaining stability.
3Device complexity
If no safety functions are activated when MCU failure occurs, then the device complexity is reduced, but the driving safety deteriorates seriously due to system paralysis
Solution Approach 1:
The patent introduces an intermediary mechanism - the maintaining voltage signal generator and driving maintainer - that mediates between MCU failure and complete system paralysis. This intermediary backup system provides a middle ground where essential functions continue operating through alternative control paths, maintaining driving safety without requiring complex redundant systems for all vehicle functions.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Ensures normal functioning of vehicle systems even after MCU failure, enhancing safety by maintaining control over essential functions such as power supply, headlamps, windscreen wipers, and doors.
Implementation Method 1
converting a voltage from an ignition coil of a vehicle to form a failure maintaining voltage signal
Data Source
AI summary
A circuit for controlling failure of a vehicle MCU includes: a failure state detector, configured to monitor the state of a MCU circuit in real time; a maintaining voltage signal generator, configured to: when the MCU circuit is detected to be in a failure state, convert a voltage from an ignition coil of a vehicle to form a failure maintaining voltage signal; and a driving maintainer, configured to output the failure maintaining voltage signal to a driving controller of each load in the vehicle so as to maintain the normal work of the driving controller.