Transmission Shift Torque Control Using Hydraulic Pressure Matrices
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Solution Overview
Problem
Conventional methods for controlling vehicle powertrains rely heavily on human experience and are time-consuming, resulting in unreliable and slow mapping of control data for transmission systems, affecting gear shifting quality and marketability.
Innovation Solution
A method that uses a controller to determine transmission shifting and select control matrices based on angular velocities, accelerations, and torques to calculate and apply hydraulic control pressures, enabling rapid and reliable control data mapping for improved gear shifting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual mapping of control data is performed by human experts, then control data can be constructed with some reliability, but the process requires a considerable period of time and heavily relies on human experience
Solution Approach 1:
The patent replaces the manual mechanical process of expert mapping with an automated computational system. The control data mapping is performed through mathematical calculations using correlation equations involving angular velocities, angular accelerations, moments of inertia, and torques, eliminating the need for manual human expertise while significantly reducing the time required to construct control data.
2Productivity
If manual mapping of control data is performed by human experts, then control data can be constructed, but the process heavily relies on human experience or proficiency resulting in lack of data reliability
Solution Approach 1:
The patent transforms the control data construction process from a subjective expert-based approach to an objective parameter-based calculation system. By using physical parameters (angular velocities, angular accelerations, moments of inertia, torques) and their correlation equations, the system achieves both high productivity and reliability through deterministic mathematical relationships rather than human judgment.
3Ease of operation
If conventional manual methods are used for transmission control mapping, then the process is simple to perform, but the gear shifting quality and marketability are affected due to time-consuming and unreliable control data
Solution Approach 1:
The system enables self-service automation where the controller automatically performs control data mapping using pre-established correlation equations and real-time sensor data from the powertrain components. This eliminates the need for manual intervention while improving gear shifting quality and marketability through consistent, repeatable, and rapid control data generation.
Data Source
AI summary
A method of controlling a powertrain of a vehicle includes determining, by a controller, whether or not a transmission is shifting and, if the transmission is shifting, the type of shifting, selecting a predetermined control matrix according to whether or not the transmission is shifting and the type of shifting, calculating a required torque of a transmission component to be controlled based on the selected control matrix, calculating a hydraulic control pressure to implement the required torque of the transmission component to be controlled, and controlling the transmission component to be controlled using the calculated hydraulic control pressure, wherein the control matrix is calculated using correlation equations of angular velocities, angular accelerations, moments of inertia, and torques of powertrain components, and boundary conditions according to the state of the transmission.