Integrated Circuit Control Unit for Passenger Protection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current control units for passenger protection systems in vehicles require multiple components, leading to increased costs, complexity, and potential breakdowns due to the separation of functions like power supply, sensor monitoring, and ignition output stages, which complicates cost reduction and reliability.
Innovation Solution
An integrated circuit with a housing in a control unit that combines a power supply unit, watchdog for processor monitoring, independent sensor value monitoring, ignition output stages, and communication interfaces like CAN bus or K line, reducing the number of elements and enhancing reliability by integrating these functions into a single compact component.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple separate components are used for power supply, sensor monitoring, and ignition output stages, then each component can be optimized independently, but the overall device complexity and cost increase
Solution Approach 1:
The patent combines power supply unit, watchdog timer, sensor monitoring circuitry, and ignition output stages into a single integrated control unit. This merging reduces the total number of separate components, simplifies the overall system architecture, and lowers cost while maintaining functional independence of each subsystem through internal modular design
Solution Approach 2:
The control unit is designed as a multi-functional integrated circuit that simultaneously performs power management, processor monitoring, sensor data evaluation, and ignition signal generation. This universal approach allows one component to replace multiple specialized components, reducing device complexity while maintaining reliability through consolidated design
2Reliability
If multiple separate components are used, then each function can be implemented with dedicated hardware, but the circuit board area and material costs increase
Solution Approach 1:
By integrating power supply, watchdog, sensor monitoring, and ignition output stages into a single control unit housing, the patent significantly reduces the circuit board area required. The consolidated design eliminates the need for multiple separate component footprints and interconnecting traces, while maintaining dedicated hardware implementation for each function within the integrated unit
Solution Approach 2:
The control unit employs a nested architecture where functional subunits (power supply circuit, watchdog timer, sensor interface, ignition driver) are contained within the single integrated housing. This nesting approach allows each function to have dedicated hardware resources while sharing the common package and mounting footprint, optimizing space utilization
3Ease of repair
If multiple separate components are used, then fault isolation is easier, but the overall breakdown rate of the control unit increases
Solution Approach 1:
The integrated control unit consolidates multiple functions into one component, reducing the total number of potential failure points in the system. While internal fault isolation mechanisms are provided through separate functional blocks, the unified design eliminates interconnection failures between separate components and reduces overall system breakdown rate
4Device complexity
If functions are integrated into a single component, then cost and complexity are reduced, but the autonomy and independent monitoring capability must be maintained
Solution Approach 1:
The integrated control unit is internally segmented into distinct functional modules: power supply unit, watchdog timer for processor monitoring, independent sensor evaluation circuitry, and ignition output stages. This segmentation maintains independent monitoring capabilities within the integrated design, allowing each function to operate autonomously while sharing the common package
Data Source
AI summary
An integrated circuit having a housing in a control unit provides at least two voltage levels, has a watchdog for monitoring a processor, performs an evaluation of at least one acceleration signal to enable at least one ignition output stage, and has at least one first interface for connecting to at least one sensor situated outside the control unit.