Vehicle Immobilizer with Segmented HVAC Control for Impaired Drivers
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Solution Overview
Problem
Current ignition interlock devices that prevent vehicles from starting when a driver's blood alcohol concentration exceeds a threshold do not adequately ensure the safety of the driver, particularly in extreme temperatures, as they disable all vehicle systems, potentially putting the driver at risk of hypothermia or heatstroke.
Innovation Solution
A system comprising an impairment sensor and a control subsystem that analyzes a driver's impairment metrics, allowing certain non-mobility-related vehicle systems, such as HVAC, to remain operational even when mobility is disabled, ensuring the driver's safety by maintaining a comfortable environment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an ignition interlock device disables all vehicle systems when blood alcohol concentration exceeds a threshold, then public safety is improved by preventing impaired driving, but driver safety deteriorates in extreme temperatures due to lack of HVAC operation
Solution Approach 1:
The vehicle systems are segmented into mobility-related apparatus (engine, transmission, steering) and non-mobility-related apparatus (HVAC, radio, windows). The control subsystem selectively disables only mobility-related apparatus while allowing non-mobility-related apparatus to operate, resolving the contradiction between preventing impaired driving and maintaining driver safety in extreme temperatures.
Solution Approach 2:
Different quality states are applied to different parts of the vehicle system. Mobility-related apparatus are disabled to prevent impaired driving, while non-mobility-related apparatus continue operating to maintain driver comfort and safety. This local differentiation resolves the contradiction by applying appropriate control quality to each subsystem.
2Reliability
If an ignition interlock device prevents vehicle starting when impairment is detected, then the vehicle cannot be operated by an impaired driver, but the driver is left without shelter or rest in extreme environments
Solution Approach 1:
The vehicle functions are segmented into essential mobility functions and non-essential comfort functions. The control subsystem disables essential mobility functions (engine, transmission) to prevent impaired driving while allowing non-essential comfort functions (HVAC, radio) to continue operating, thereby maintaining driver comfort during temporary immobilization.
Solution Approach 2:
Instead of completely disabling all vehicle systems, the control subsystem applies partial action by selectively disabling only mobility-related apparatus while allowing non-mobility-related apparatus to operate. This partial disabling approach prevents impaired driving while excessive enough to maintain driver comfort through continued HVAC and entertainment system operation.
3Reliability
If all vehicle apparatus are disabled when impairment is detected, then the vehicle is fully immobilized, but essential safety systems like HVAC cannot operate in extreme temperatures
Solution Approach 1:
The vehicle apparatus are segmented into mobility-related apparatus (engine, transmission, steering wheel) and non-mobility-related apparatus (HVAC system, radio, window controls). The control subsystem disables only mobility-related apparatus while allowing non-mobility-related apparatus including HVAC to operate, resolving the contradiction between full immobilization and temperature control capability.
Solution Approach 2:
Different operational qualities are applied locally to different vehicle subsystems. Mobility-related apparatus receive a disabled quality state to prevent impaired driving, while non-mobility-related apparatus including HVAC receive an enabled quality state to maintain cabin temperature control and driver safety in extreme temperatures.
Data Source
AI summary
Embodiments include systems and methods for immobilizing a motor vehicle. A system comprises an impairment sensor system and a control subsystem. The impairment sensor system is adapted to perform an analysis of a sample provided by an operator of a motor vehicle, where the analysis includes determining an impairment-related metric based on the sample. The control subsystem is adapted to control at least one mobility-related apparatus and at least one non-mobility-related apparatus of the motor vehicle. When the result of the analysis indicates that the impairment-related metric does not meet a criteria, the control subsystem is adapted to control the at least one mobility-related apparatus in a manner that disables the motor vehicle from moving and to control the at least one non-mobility-related apparatus in a manner that allows the at least one non-mobility-related apparatus to operate.