Optimal starting control of zero-synchronous shock AMT based on torque compensation

Area of Science:

• Automotive Engineering
• Control Systems
• Mechanical Engineering

Background:

• Current automated manual transmission (AMT) starting control methods exhibit shortcomings.
• Starting control involves dynamic, smoothness, and low slippage requirements, with dynamic requirements as the primary objective.

Purpose of the Study:

• To propose an optimal control principle for AMT starting.
• To develop an optimal starting control method with zero synchronous shock based on torque compensation.
• To design an optimal starting controller with three control loops.

Main Methods:

• Dynamic analysis of the AMT starting process.
• Determining clutch target engagement based on power requirements.
• Establishing engine speed control strategy and target speed for low slip wear.
• Calculating clutch engagement speed and synchronous compensation torque for ride comfort.

Main Results:

• An optimal starting control method with zero synchronous shock was proposed.
• A three-loop optimal starting controller was designed for closed-loop control functions.
• Vehicle tests and simulations confirmed the effectiveness of the proposed control method.

Conclusions:

• The proposed control method effectively meets AMT starting control goals.
• Synchronization shock is eliminated simply and efficiently.
• The approach enhances vehicle performance and reduces clutch wear during starting.