Vehicle Transmission Synchronizer Torque Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing vehicle transmission systems face challenges in accurately and smoothly changing speed due to inadequate synchronization torque control, leading to potential shock during gear changes and incomplete engagement between the sleeve and clutch gear.
Innovation Solution
A method and apparatus that calculate the synchronization torque and control the synchronizer's displacement based on real-time driving conditions and feedback calibration, ensuring optimal speed change modes and minimizing shock during gear transitions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high synchronization torque is applied to the synchronizer, then the sleeve can engage with the clutch gear, but shock is generated due to gear inertia and driving quality is lowered
Solution Approach 1:
The patent applies dynamics by making the synchronization torque variable rather than constant. The torque is adjusted in real-time based on the actual speed difference between gears and the current engagement stage, allowing the system to adapt to changing conditions during the gear change process.
Solution Approach 2:
The patent changes the parameter of synchronization torque from a fixed value to a dynamically adjusted value. The control unit calculates and modifies the torque based on speed difference, engagement progress, and other real-time parameters to optimize both engagement reliability and shock reduction.
2Object-affected harmful factors
If low synchronization torque is applied to the synchronizer, then shock is minimized, but the sleeve may fail to engage with the clutch gear
Solution Approach 1:
The synchronization torque is made dynamic, increasing when needed for engagement and decreasing when the engagement progresses, ensuring both reliable engagement and minimal shock throughout the process.
Solution Approach 2:
The control unit calculates the required synchronization torque in advance based on predicted speed differences and engagement requirements, preparing the optimal torque profile before the actual engagement occurs.
3Device complexity
If fixed synchronization torque is used, then the control system is simple, but accurate speed change control cannot be achieved under varying driving conditions
Solution Approach 1:
The patent implements feedback control where the control unit continuously monitors actual speed differences, engagement progress, and other parameters, then adjusts the synchronization torque accordingly to achieve precise speed change control under varying driving conditions.
Solution Approach 2:
The patent replaces a purely mechanical fixed-torque synchronization system with an electronically controlled system that uses sensors, processors, and actuators to dynamically adjust torque, substituting mechanical simplicity with electronic intelligence for improved precision.
Data Source
AI summary
The present invention relates to a method and apparatus for controlling a transmission of a vehicle and, more particularly, to a method and apparatus for controlling synchronization of a synchronizer included in a transmission. The method includes determining a speed change mode of a vehicle and a target time corresponding to the speed change mode; calculating a difference in speed between an input shaft and an output shaft with respect to a current time; calculating a speed increment or decrement of the output shaft from the current time to the target time; calculating a synchronization torque using the difference in speed and the speed increment or decrement; determining a target displacement of a synchronizer using the synchronization torque; and controlling the synchronizer according to the target displacement and recognizing a sleeve with a clutch gear.