Cruise Control Switch Combination Validation
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Solution Overview
Problem
Cruise control systems face issues with unintentional switch operations, leading to mistrust among drivers due to incorrect interpretation of simultaneous switch presses, which can result in continued cruise control despite the driver's intention to cancel it.
Innovation Solution
A cruise control system with a detecting unit and determining unit to identify and prevent acceptance of instructions when specific combinations of switch operations match predetermined disallowed combinations, ensuring accurate execution of driver intentions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the cruise control system accepts instructions from multiple switches independently, then the system responds to individual switch operations, but unintentional simultaneous switch presses cause incorrect interpretation of driver intentions
Solution Approach 1:
The system pre-defines invalid switch combinations in advance (main switch + set switch, main switch + resume switch, cancel switch + set switch, cancel switch + resume switch) and checks against these combinations when simultaneous presses are detected, preventing incorrect interpretation before it occurs
Solution Approach 2:
The control unit acts as an intermediary that receives signals from multiple switches, validates their combinations against pre-defined invalid patterns, and only processes valid combinations, thereby mediating between raw switch inputs and cruise control execution
2Reliability
If the system disables all switches when simultaneous presses are detected, then conflicting instructions are prevented, but the latest intended operation may also be disabled causing driver discomfort
Solution Approach 1:
The system segments the switch handling process into two distinct phases: validation phase (checking if the combination is invalid) and execution phase (processing the valid instruction). This segmentation allows the system to reject only invalid combinations while processing valid ones, rather than disabling all switches
3Device complexity
If the cruise control system uses simple switch detection without combination validation, then the system structure remains simple, but simultaneous switch presses lead to mistrust among drivers
Solution Approach 1:
The control unit performs preliminary validation of switch combinations by comparing detected simultaneous presses against pre-defined invalid patterns before executing any cruise control function, ensuring reliable interpretation of driver intentions
Solution Approach 2:
The system provides feedback to the driver through appropriate cruise control responses - accepting valid switch combinations and rejecting invalid ones - which builds driver trust by ensuring the system consistently interprets intentions correctly
Data Source
AI summary
In a cruise control system installed in a vehicle and electrically connected to a plurality of switches installed therein, a detecting unit detects that one of the plurality of switches is operated. A cruise control unit executes cruise control of the vehicle based on an instruction corresponding to the one of the plurality of switches upon detection of the one of the plurality of switches being operated. When the detecting unit detects that, during the first switch being operated, the second switch is operated, and when a combination of first and second instructions sent from the detected first and second switches is matched with at least one predetermined combination of instructions to be sent from the plurality of switches, a cruise control disabling unit disables the cruise control unit to execute cruise control of the vehicle based on the second instruction.