Torque-Based Transmission Shift Control for Real-Time Ratio Matching
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Solution Overview
Problem
Current speed change control systems for automatic transmission vehicles cannot achieve real-time gear ratio matching, leading to inefficient engine operation and transmission efficiency, with a limited number of gears and abrupt shifts, resulting in suboptimal working conditions.
Innovation Solution
A transmission speed change control system utilizing effective torque force as a master control parameter, incorporating a power input structure, driven structure, effective torque force monitoring and feedback device, and gearshift, with optional auxiliary devices like torque force adjusting and buffering devices, to enable real-time gear shifting based on continuously changing torque force signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional sensor-based shift logic control is used, then the system structure is simple, but real-time speed ratio matching cannot be achieved and transmission efficiency is low
Solution Approach 1:
The patent replaces traditional sensor-based electronic control with a direct mechanical sensing system. The mechanical sensor directly detects torque force on the input shaft and converts it to hydraulic signals for gearshift control, eliminating complex electronic sensors and processors while achieving real-time response
Solution Approach 2:
The system uses the transmission's own operating parameters (torque force on input shaft) as the control signal source. The mechanical sensor automatically converts this physical parameter into control signals without requiring external sensing systems or complex data processing
2Productivity
If a limited number of gears are used, then the system structure is simple, but the engine cannot be maintained in optimal working condition and efficiency is reduced
Solution Approach 1:
The patent implements continuous variable gear ratio adjustment instead of fixed discrete gears. The gear ratio can dynamically change according to the detected torque force, allowing the transmission to continuously adapt to varying engine conditions and maintain optimal efficiency across the entire operating range
Solution Approach 2:
The system changes the gear ratio parameter continuously based on the torque force signal. By varying the gear ratio according to real-time torque conditions, the engine can operate at optimal points regardless of the vehicle speed or load requirements
3Ease of operation
If traditional shift control is used, then the system is simple, but shift smoothness is poor and abrupt shifts occur
Solution Approach 1:
The patent implements a closed-loop feedback system where the mechanical sensor continuously monitors torque force and provides real-time feedback signals to the gearshift mechanism. This allows the system to detect changing load conditions and adjust gear ratios smoothly without abrupt transitions
Solution Approach 2:
The patent introduces a mechanical sensor as an intermediary between the torque force and the gearshift control. This sensor acts as a mediator that converts mechanical torque into hydraulic control signals, enabling smooth and progressive gear transitions
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This system maintains the transmission in an optimal condition by enabling real-time speed ratio matching, improving efficiency and smoothness, and extending the service life of the power input source, with faster gear shifting responses and simplified configuration.
Implementation Method 1
The effective torque force monitoring and feedback device can monitor the effective torque force in the torque transmission process between the power input structure and the transmission and generate feedback signals
Implementation Method 2
The torque force buffering device can buffer the effective torque force, eliminate sudden change of the torque force, ensure smooth change of the torque force
Implementation Method 3
The transmission can change the rotating speed and torque transmitted from the power input source to the driven structure, and can change a gear ratio between the power input source and the driven structure
Data Source
AI summary
A transmission speed change control system using effective torque force as a master control parameter instead of throttle percentage signal and engine speed signal. Response time of this system is extremely shorter than existing system, therefore, when this transmission speed change control system is used in cooperation with a continuously variable transmission, the real-time speed ratio matching, can be realized, and the transmission system is maintained in an optimal working condition at any time, so as to improve the transmission efficiency of the transmission system. Meanwhile, the load of the power source can be adjusted without abrupt change. Hence, the work efficiency of the power source is improved, and the service life thereof is prolonged. At the same time, compared with the existing transmission system, the composition and control logic of this control system are simpler and more efficient, and easier to calibrate and adjust.