Vehicle Transmission Shift Control for Autonomous and Manual Modes
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Solution Overview
Problem
Existing vehicle transmission control systems face challenges in shifting gears optimally between autonomous driving and manual driving, often resulting in poor response during manual driving and excessive shift shock during autonomous driving.
Innovation Solution
A control device and method that utilizes an electronic control unit to adjust transmission shift times based on driving modes, setting shift times shorter during manual driving and longer during autonomous driving to improve response and reduce shock.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If shift control is performed with an emphasis placed on suppression of shock during autonomous driving, then smooth shifting is achieved, but the transmission is shifted with poor response during manual driving
Solution Approach 1:
The patent applies dynamics by making the shift control characteristics changeable based on driving mode. The electronic control unit dynamically adjusts shift control parameters - using shock-suppression prioritized control during autonomous driving and response-speed prioritized control during manual driving. This allows the transmission shifting behavior to adapt to different operational requirements, resolving the contradiction between smooth shifting and fast response.
2Loss of time
If the shift time is shortened to improve shift response during manual driving, then shift response is improved, but shift shock increases during autonomous driving
Solution Approach 1:
The patent applies local quality by implementing different shift control strategies for different driving modes. During manual driving, the control unit prioritizes reducing shift time to improve response. During autonomous driving, the control unit prioritizes suppressing shift shock for comfort. This localized optimization for each operational context resolves the contradiction between fast shifting and smooth shifting.
3Device complexity
If a single shift control strategy is used for both autonomous and manual driving, then device complexity is reduced, but the system cannot achieve optimal performance for both modes
Solution Approach 1:
The patent applies universality by designing a single electronic control unit that performs multiple shift control functions. The same control unit automatically selects appropriate shift control strategies based on the detected driving mode (autonomous or manual), providing both shock suppression and fast response capabilities without requiring separate control systems. This multi-functional approach resolves the contradiction between simplicity and adaptability.
Data Source
AI summary
A control device for a vehicle, the vehicle includes a transmission provided in a power transmission path between a drive power source and drive wheels. The control device includes an electronic control unit configured to i) shift the transmission according to traveling conditions, ii) switch a driving mode for running the vehicle between autonomous driving under autonomous driving control, and manual driving based on driving operation of a driver, and iii) shift the transmission such that a shift time required for shifting of the transmission during the manual driving is shorter than a shift time required for shifting of the transmission during the autonomous driving.