Two-Layer Structure Control of an Automatic Mechanical Transmission Clutch During Hill Start for Heavy-Duty Vehicles

Two-Layer Structure Control of an Automatic Mechanical Transmission Clutch During Hill Start for Heavy-Duty Vehicles

Blog Article

The engagement control of an automatic mechanical transmission (AMT) clutch during the hill start of a heavy-duty vehicle has a significant impact on the comfort, safety and service life of the vehicle.However, the control effect of a traditional control strategy can be easily affected by interference (clutch wear, temperature).Therefore, this paper proposes a two-layer structure control strategy based on an AMT clutch automatic actuator with the clutch engagement speed as 4 Piece Pub Set the control target.First, the clutch automatic actuator is designed and the governing characteristics of the diesel engine and the control characteristics of the solenoid valve are studied.Second, a logic threshold control method and PID control method are adopted in the proposed two-layer structure control method.

Moreover, the robustness of the proposed control algorithm is validated by a co-simulation platform (TruckSim, MATLAB/Simulink).Finally, experimental research under different slopes (13% and 22%) is carried out to verify the simulation results.The experimental results prove that compared with a single-layer control strategy, the two-layer control strategy proposed in this paper can shorten the start time by more than 10%, and reduce the vehicle start-up jerking Power Converters by approximately 20%, which significantly improves the performance of the vehicle in the hill start process.