Vehicle Shift Control System Parking Lock Indicator Logic
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Solution Overview
Problem
The existing vehicle shift control systems face issues with the lock indicator lamp turning on or off at inappropriate times, leading to user confusion and potential decreases in charging efficiency during plug-in charging, especially when the vehicle is in a power-off or partially powered state without a shift operation.
Innovation Solution
A vehicle shift control system that synchronizes the lock indicator lamp's operation with the vehicle's power status, ensuring it turns on or off based on the predetermined request signal for setting the locked state, thereby preventing unnecessary illumination and maintaining accurate indication of the parking lock state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the lock indicator lamp is turned on whenever parking lock is set (including during power-off status), then the parking lock state is indicated to the driver, but the lamp may dazzle the user and decrease charging efficiency during plug-in charging
Solution Approach 1:
The patent applies parameter changes by modifying the operational conditions of the lock indicator lamp based on the power supply status parameter. When the vehicle is in power-off status, the lamp's illumination parameter is changed to off state, while in power-on status it operates normally. This conditional parameter adjustment resolves the contradiction by eliminating harmful illumination during charging without compromising indication reliability when the system is active.
Solution Approach 2:
The patent implements dynamics by making the lock indicator lamp's operation dynamic rather than static. The lamp adapts its state based on real-time power supply conditions and parking lock status. This dynamic behavior allows the system to optimize between providing accurate indication and avoiding harmful effects like user confusion and reduced charging efficiency.
2Loss of energy
If the lock indicator lamp is turned off during power-off status, then charging efficiency is maintained, but the parking lock state indication may be lost when power is restored
Solution Approach 1:
The patent applies feedback by implementing a system that continuously monitors both the power supply status and parking lock state, and adjusts the indicator lamp accordingly. When power is restored, the system detects the current parking lock state and activates the lamp to provide accurate indication. This feedback mechanism ensures that information is not lost during power transitions while maintaining energy efficiency during power-off status.
3Adaptability or versatility
If the parking lock device is activated on basis of request signal during power-off status, then the locked state is set for plug-in charging, but the lock indicator lamp turns on unnecessarily
Solution Approach 1:
The patent applies parameter changes by introducing conditional logic that modifies the lock indicator lamp's operational parameter based on power supply status. When the vehicle is in power-off status (even though parking lock can be activated for plug-in charging), the lamp illumination parameter is set to off. When in power-on status, the lamp operates normally. This resolves the contradiction by allowing parking lock activation for charging versatility while preventing unnecessary energy consumption from lamp illumination during power-off status.
Data Source
AI summary
When a P lock state is set on the basis of a predetermined request signal for setting the P lock state, a P position indicator lamp (62) is turned on or off on the basis of the status of power supplied to the vehicle (10). For example, when the P lock state is set, the P position indicator lamp (62) is turned off when the power status is an ALL-OFF status where a combination meter (56), or the like, is not turned on or is raised to an ACC-ON status; whereas, when the P lock state is set, the P position indicator lamp (62) is turned on when the power status is an IG-ON status, when the power status is changed from the IG-ON status during vehicle driving to the ACC-ON status, or within a predetermined period of time from when the power status is changed from the IG-ON status to the ALL-OFF status.