Analysis of Improving Automatic Transmission Upshift Performance by Using Off-Going Clutch During Inertia Phase
ASME Journal of Dynamic Systems, Measurement, and Control, Vol. 144, No. 2, pp. 021001-0210142022The paper presents a detailed numerical and algebraic analysis of potential for improving the step ratio automatic transmission (AT) upshift performance by means of modulating the off-going clutch during the inertia phase. The numerical analysis is based on Pareto optimal frontiers obtained by using the previously developed methods for AT shift control trajectory optimization and piecewise-linear control profile parameter optimization, where the control objectives include minimization of shift time, vehicle RMS jerk, and clutch dissipated energy. The analysis concerns the following control scenarios related to inertia phase: 1) oncoming clutch control only, 2) combined action of oncoming and off-going clutch; 3) oncoming clutch control extended with engine torque reduction control, and 4) combining all three control actions. The numerical results relate to an advanced 10-speed AT and various single-step and double-step upshifts, with emphasis on 1-3 shift. The numerical analysis results are proven algebraically based on a simplified AT model represented in bond graph form. The presented analysis shows that the off-going clutch can reduce either shift time or RMS jerk index by introducing power recirculation via the two clutches, which is in turn paid for by certain increase of AT energy loss. engines; inertia (Mechanics); optimization; torque; dynamics (mechanics); torque convertersengines; inertia (mechanics); optimization; torque; dynamics (mechanics); torque converters
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ASME Journal of Dynamic Systems, Measurement, and Control, Vol. 144, No. 2, pp. 021001-021014
2022
Cited by 9
▾
-
[1] Modeling and Time Discrete Characteristics Analysis of the Oil Filling Process of Wet Clutch for a Specialized Vehicle’s Automatic Transmission🔗SAE technical paper series, 2024
-
[2] Adaptive coordinated control strategy for improving shift quality under different operating conditions🔗Proceedings of the Institution of mechanical engineers. Part D, journal of automobile engineering, 2024
-
[3] Optimal Control Allocation-Based Automatic Transmission Upshift Control Strategy for Inertia Phase🔗IEEE Transactions on Vehicular Technology, 2024
-
[4] Multi-objective parameter optimization strategy based on engine coordinated control for improving shifting quality🔗Advances in Mechanical Engineering, 2023
-
[5] Model Predictive Control for Automatic Transmission Upshift Inertia Phase🔗IEEE Transactions on Control Systems Technology, 2023
-
[6] Surrogate-assisted multi-objective optimization for control parameters of adjacent gearshift process with multiple clutches🔗Control Engineering Practice, 2023
-
[8] Rule-Based Time-Optimal Engine-Start Coordination Control with a Predesigned Vehicle Acceleration Trajectory in P2 Hybrid Electric Vehicles🔗Journal of Dynamic Systems Measurement, and Control, 2022