Hybrid Vehicle Shifting Control Method for Mode Switching
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Solution Overview
Problem
Current shifting control methods for hybrid vehicles with automatic mechanical transmission lack mode switching capabilities, limiting their ability to adapt to different driving requirements and resulting in poor fuel economy and limited use scope.
Innovation Solution
A shifting control method that detects operating parameters and determines work modes to perform speed adjustment and shifting control, enabling seamless transitions between electric-vehicle and hybrid-electric-vehicle modes, and includes a power transmission system with a motor-generator and a detecting module to optimize gear shifts and improve vehicle smoothness and comfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single controlling mode is used for shifting control, then the control system is simple, but it cannot satisfy driving requirements of different modes and results in poor fuel economy
Solution Approach 1:
The control system dynamically switches between different controlling modes (first controlling mode for engine-only operation, second controlling mode for hybrid operation) based on detected operating parameters such as vehicle speed and accelerator pedal position. This dynamic adaptation allows the system to optimize fuel economy across varying driving conditions without requiring a permanently complex control architecture.
Solution Approach 2:
The system changes operational parameters by switching between different controlling modes. The HCU determines whether to operate in engine-only mode or hybrid mode based on detected parameters, and adjusts motor torque, engine torque, and synchronizer control accordingly. This parameter-based mode switching enables the system to adapt to different driving requirements while maintaining a relatively simple underlying control structure.
2Use of energy by moving object
If mode switching is added to satisfy different driving requirements, then fuel economy improves, but the control system becomes more complex
Solution Approach 1:
The control system implements dynamic mode switching between engine-only operation and hybrid operation based on real-time detection of operating parameters. This dynamic capability allows the system to optimize fuel economy by selecting the appropriate mode for current driving conditions, while the complexity is managed through a unified control architecture that handles both modes through standardized detection and control流程和.
3Ease of operation
If speed adjustment and shifting control are performed under various working conditions, then vehicle smoothness and comfort improve, but the control algorithm becomes more complex
Solution Approach 1:
The control algorithm adjusts operational parameters (motor torque, engine torque, synchronizer position) based on detected operating parameters and the determined working mode. By changing these parameters appropriately during mode transitions and gear shifts, the system maintains vehicle smoothness and comfort. The complexity is managed by implementing these parameter adjustments within a unified control framework that handles multiple working conditions through a structured decision-making process.
Data Source
AI summary
The present disclosure discloses a shifting control method for a hybrid vehicle. The shifting control method includes: detecting operating parameters of the hybrid vehicle, where the operating parameters of the hybrid vehicle includes vehicle speed, vehicle acceleration as reflected from an accelerator-pedal signal and a current gear of the hybrid vehicle; determining a work mode of the hybrid vehicle; performing speed adjustment and shifting control to the first motor-generator according to a work mode and the operating parameters of the hybrid vehicle to implement shifting control of the hybrid vehicle, where the work mode includes an electric-vehicle mode and a hybrid-electric-vehicle mode. The method considers performing speed adjustment and shifting control under various working conditions. This improves smoothness and comfort of the vehicle and enlarges the use scope. The present disclosure further discloses a power transmission system of a hybrid vehicle and a hybrid vehicle.