The Modeling And Simulation Of Powertrain For Engineering Vehicles

In this dissertation we present an overview of our engine, hydraulic torque converter and driveline modeling for heavy-duty engineering vehicles. The models we construct are suitable for control design and simulation, and they are used in our vehicular experiment for engineering vehicles. We first review basic concepts from spark-ignition engine modeling and then proceed to a detailed description of our model of a turbocharged intercooled diesel engine, which is the engine type used in engineering vehicles. Then we review basic concepts of transmission modeling, including torque converter and transmission mechanicals. At last, we review basic methods of driveline modeling and construct a practical model for it. In diesel engine modeling chapter the problem is the development of a turbocharged diesel engine model suitable for longitudinal control design for engineering vehicles. The vast majority of existing internal combustion engine models serves purposes such as engine performance improvement or diagnostics. Engine models meant for vehicle control have been developed only for normally aspirated spark ignition (SI) engines. Unfortunately, they cannot be adapted to describe the compression ignition (CI) of the diesel engine and to capture the effect of the turbocharger. After studying both gasoline and diesel engine models at different levels of complexity we tried to build a model that best suits our needs. A serious effort was made to achieve simplicity without sacrificing accuracy. Simulations were performed using SIMULINK the results testify the validity of the model. As we all know manual transmissions require a clutch to uncouple the transmission from the engine so that gears can be shifted. In an AT, hydraulic pressure is used to control shifts. Instead of flowing through the clutch to the gears, engine power flows from the crankshaft to the torque converter. The latter is filled with oil and acts as a fluid coupling. It allows gear shifting while power is flowing through the transmission. However, there are still other advantages of hydraulic torque converter we don't mention here. In this torque converter modeling chapter, the basic principle of...