Vehicle Shift Control for Simultaneous P and N Button Operation
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Solution Overview
Problem
Existing vehicle shift control systems fail to efficiently handle simultaneous operations of multiple switches, leading to unintended shift position selections that can compromise safety and efficiency.
Innovation Solution
A control method that prioritizes the operation of switches for shift positions where power is not transmitted to the drive wheel over those where power is transmitted, maintaining the intended shift position even when multiple switches are operated simultaneously.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a plurality of switches are simultaneously operated including the switch operation for selecting a parking position and a neutral position, then safety is improved by determining a default shift position, but the driver's intended shift position may be incorrectly selected
Solution Approach 1:
The control device performs preliminary detection of switch operation states before final shift position determination. When multiple switches are simultaneously operated, the system detects the timing and state of each switch operation in advance, identifies the driver's intended shift position based on operation sequence, and then determines the final shift position accordingly, preventing incorrect selection while maintaining safety
Solution Approach 2:
The control device dynamically adjusts the shift position determination based on the temporal sequence of switch operations. Rather than using a static default position, the system monitors the timing and state changes of switch operations in real-time, allowing the determination logic to adapt to the driver's actual intent while still providing safety through controlled default behavior
2Reliability
If a default shift position is determined when multiple switches are simultaneously operated, then safety is improved, but control efficiency is reduced due to incorrect shift position selection
Solution Approach 1:
The control device incorporates feedback mechanisms that monitor switch operation states and use this information to optimize shift position determination. By detecting the sequence and timing of switch operations, the system provides feedback to the determination logic, enabling efficient and accurate shift position selection that maintains safety while improving control efficiency
Solution Approach 2:
The control device replaces traditional mechanical switch priority mechanisms with electronic detection and control logic. Instead of relying on fixed mechanical hierarchies that reduce efficiency, the system uses electronic sensors and processors to detect switch states, analyze operation sequences, and determine shift positions dynamically, thereby improving control efficiency while maintaining safety
Data Source
AI summary
A vehicle selects a parking position when a state in which a P range button (2) is operated overlaps a state in which an N range button (4) is operated. Thereafter, the vehicle maintains the parking position when the operation of P range button (2) is released and switched to the state in which N range button (4) is operated. This allows the vehicle to suppress the selection of a shift position that is different from the intention of the driver.