Vehicle Shift Mode Control for Speed Ratio-Based Auto Return
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Solution Overview
Problem
Existing shift mode control systems in vehicles do not allow for immediate switching from manual shift mode to automatic shift mode when the driver reaches a desired speed ratio, requiring additional manual operations and causing inconvenience.
Innovation Solution
A shift mode control system that calculates and updates the speed ratio change amount as a switching condition, allowing for automatic switching from manual to automatic mode when the desired speed ratio is reached, using a processor and memory to manage the switching operations through paddle switch and shift lever inputs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the system uses a fixed predetermined distance for automatic mode switching, then the control logic is simple, but it causes driver inconvenience when the desired speed ratio is reached before the predetermined distance
Solution Approach 1:
The patent applies dynamics by changing the switching condition from a fixed predetermined distance to a dynamic speed ratio change amount. The system now adapts the switching criterion based on actual speed ratio changes rather than relying on a static distance threshold, allowing immediate switching when the desired speed ratio is reached regardless of distance traveled.
Solution Approach 2:
The patent changes the control parameter from predetermined distance to speed ratio change amount. By monitoring the difference between current and target speed ratios, the system can determine when switching to automatic mode is appropriate, directly addressing driver needs without requiring additional manual operations.
2Productivity
If the system requires additional manual operations for mode switching, then the switching condition is clearly defined, but it increases the number of操作步骤 and causes driver inconvenience
Solution Approach 1:
The system performs self-service by automatically detecting when the desired speed ratio is reached and initiating the mode switch without requiring additional manual operations from the driver. The control apparatus monitors speed ratio changes and autonomously determines when to switch from manual to automatic mode, eliminating unnecessary操作步骤.
Solution Approach 2:
The system uses feedback by continuously monitoring the speed ratio change amount and comparing it to the target speed ratio. When the feedback indicates that the desired speed ratio has been reached, the system automatically triggers the mode switching, creating a closed-loop control that responds to actual driving conditions.
3Adaptability or versatility
If the system uses learning correction to shorten predetermined distance, then it adapts to driver behavior, but it still relies on distance-based switching which may not be optimal
Solution Approach 1:
The patent fundamentally changes the measurement parameter from distance to speed ratio change amount. This provides more precise and direct measurement of whether the driver's desired speed ratio has been reached, improving switching condition accuracy beyond what distance-based learning can achieve.
Solution Approach 2:
The patent replaces the mechanical distance-based switching mechanism with a speed ratio-based electronic control system. This substitution allows for more precise and flexible adaptation to driver behavior by directly monitoring transmission state changes rather than relying on odometer readings.
Data Source
AI summary
A shift mode control system includes a control apparatus that controls a shift mode of a vehicle, a first operation device that receives a first operation to switch an automatic mode to a manual mode, and a second operation device that receives a second operation to switch the manual mode to the automatic mode. The control apparatus includes a processor that calculates a speed ratio change amount that is a difference between a first speed ratio set when the automatic mode is switched to the manual mode in accordance with the first operation and a second speed ratio set when the manual mode is switched to the automatic mode in accordance with the second operation. The processor updates the speed ratio change amount set as a switching condition for automatically switching the manual mode to the automatic mode to the speed ratio change amount calculated by the processor.