Vehicle Shift Control for Overlapping Range Button Inputs
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Solution Overview
Problem
Existing vehicle shift control systems fail to efficiently determine the intended shift position when multiple switches are operated simultaneously, leading to unintended shift positions that can compromise safety and efficiency.
Innovation Solution
A control method that prioritizes switches based on whether they transmit power to the drive wheel, ensuring that the shift position where power is not transmitted to the drive wheel is maintained when overlapping operations occur, and only switches to a position transmitting power to the drive wheel when the previous state is released.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a plurality of switches are simultaneously operated, then safety is improved by determining a default shift position, but the shift position selected may differ from the driver's intention
Solution Approach 1:
The control device performs preliminary determination of the shift position based on the operation state of switches before actual shift execution. When multiple switches are simultaneously operated, the control device determines the shift position in advance according to predetermined priority rules, ensuring safety while maintaining clear control logic.
Solution Approach 2:
The control device continuously monitors the operation state of switches and provides feedback control. When a switch operation is detected, the control device determines the corresponding shift position and provides feedback by controlling the shift mechanism to move to the determined position, ensuring the actual shift matches the intended operation.
2Productivity
If the shift position is determined by switch operation priority, then control efficiency is improved, but false starts may occur
Solution Approach 1:
The control device applies preliminary anti-action by determining the shift position based on the operation state of switches before the actual shift occurs. When multiple switches are simultaneously operated, the control device uses predetermined priority rules to determine which shift position should be selected, preventing false starts by ensuring the correct shift position is chosen in advance.
Solution Approach 2:
The control device prepares for potential conflicts by establishing predetermined priority rules for switch operations in advance. This beforehand cushioning ensures that when multiple switches are simultaneously operated, the system can smoothly determine the correct shift position without causing false starts or operational conflicts.
Data Source
AI summary
A vehicle selects a parking position or a neutral position when a state in which a P range button (2) or an N range button (4) is operated overlaps a state in which a D range button (5) or an R range button (3) is operated. Thereafter, the vehicle maintains the parking position or neutral position when the operation of P range button (2) or N range button (4) is released to switch to a state in which D range button (5) or R range button (3) is operated. This allows the vehicle to suppress a false start and inhibit the selection of a shift position that is different from the intention of the driver.