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The friction coefficient identification of dry clutch is a precondition for precise model-based dry clutch control. Recursive Least Square with forgetting factors is adopted to identify the friction coefficient of dry clutch during vehicle starting-up process. Because the accuracy of the engine damp coefficient affects friction coefficient identification of the clutch, it is necessary to identify...
Control problem is investigated for dry clutch engagement process during a standing start in AMT vehicles. Based on the control-oriented simplified driveline dynamic model under consideration of parametric uncertainties of the driveline due to the mechanical wear and tear, the elastic deformation of shaft and so on, an adaptive tracking control strategy is examined paying particular attention to the...
Vehicle energy-saving is important to relieve source shortage and protect environment. This article mainly discusses the control of parallel hydraulic hybrid heavy vehicle (PHHHV), which uses hydraulic components to recycle the brake energy. Through analyzing the two power sources and two brake systems in the PHHHVs, the control rules have been brought out. By logic threshold value control strategy,...
In this paper, the controller is proposed for vehicle start-up process by using Model Predictive Control (MPC) strategy, which considers the state and input variables (engine speed ωe, clutch friction torque Tc and engine torque Te) constraints in the problem formulation. The contradictive requirements of less friction loss and less driveline shock are included in the objective function. The proposed...
Study on the friction torque of diesel engine is quite important to the transient fuel control. For the complexity of the system, there is no effective model the friction torque. After further study on the diesel engine, the friction torque is divided into several components and different model was built for each component. The model is used for multi-cylinder, four stroke engine. In order to prove...
Parallel hydraulic hybrid vehicles (PHHV) have the potential of improving fuel economy by operating the engine in the optimum efficiency range and making use of regenerative braking during deceleration. Based on the analysis of the characteristics of braking in the city drive cycle and high power density of hydraulic hybrid vehicles, a new regenerative braking strategy tailored specially for PHHV...
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