Automatic Transmission Shift Control with Pre-Selected Manual Mode
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Solution Overview
Problem
Conventional automatic transmission systems require complex operations to select between normal and temporary manual modes, leading to potential driver errors and increased operational complexity.
Innovation Solution
A shift control system that automatically sets the vehicle to a temporary manual mode when the ignition switch is turned on, allowing for simplified operation by enabling gear stage changes and reverting to automatic transmission mode when specific conditions are met, such as vehicle speed exceeding a threshold.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the control device provides both normal manual mode and temporary manual mode with complex selection operations, then the functionality and versatility are improved, but the ease of operation deteriorates and driver errors increase
Solution Approach 1:
The system performs preliminary action by automatically setting the temporary manual mode as the default when the ignition is turned on, before the driver needs to make any selection. This eliminates the need for complex mode selection operations while still providing both normal and temporary manual modes when needed, thereby resolving the contradiction between versatility and ease of operation
Solution Approach 2:
The control device serves itself by automatically selecting the temporary manual mode without requiring driver intervention for mode selection. The system self-determines the appropriate default mode based on ignition status, reducing operational complexity while maintaining full functionality when manual mode selection is actually needed
2Adaptability or versatility
If the control device requires driver operation for mode selection, then the adaptability is improved, but the device complexity increases
Solution Approach 1:
The system performs the mode selection action preliminarily and automatically based on ignition status, eliminating the need for complex driver operations. The temporary manual mode is pre-selected as default, simplifying the interface while preserving the ability to access both manual modes when needed
Data Source
AI summary
A shift control system for an automatic transmission is provided, which is mounted on a vehicle configured to be started by an ignition switch being turned on, where an automatic transmission mode or a manual transmission mode is selectively set. The system includes a shift switch through which a manual transmission command for arbitrarily changing a gear stage of the automatic transmission can be inputted in the manual transmission mode, and a controller. The manual transmission mode includes a first manual mode in which the gear stage is changed and maintained by inputting the manual transmission command using the shift switch, and a second manual mode in which the automatic transmission mode is resumed by satisfying a resuming condition after the gear stage is changed. When the ignition switch is turned on, the controller selects in advance the second mode to be set to the automatic transmission.