The Platform Develpotment Of Rapid Control Prototype For Intergrated Powertrain

The vehicle powertrain system is the general designation of the engine and transmission. The vehicle integral control technology is widely used in vehicle control field, and the integrated control of power transmission is gradually becoming one of the important development directions of the vehicle integral control. The rapid control prototype of integrated powertrain can quickly and truly verify the control strategy, using dSPACE MicroAutoBox, which has more powerful function than common chip and can verify more complicated control strategy. However, the MicroAutoBox is unable to do the bench experiment, needs a set of hardware device to realize some drive function and some signal processing function. In this paper, a prototype platform of integrated powertrain is developed, and some experiments are carried out on it.1. Design the control software for integrated powertrain by using the method of model. The construction of the model is based on the method of software component, which is easy to debug, modify, update and develop two times and greatly improve the software development efficiency and shorten the development cycle. According to the torque structure, the power transmission system is divided into three parts: the engine control system, the gearbox control system and the torque coordination system.2. The development of the hardware of the rapid control prototype is completed by the original one integrated controller. The power supply board, signal processing board, engine driving board and transmission drive board of the controller are reserved, and the original digital board is removed, then a interface circuit board is developed, which contains the CPLD chip circuit and the optocoupler circuits of MicroAutoBox input and output signals. In addition to the design of the digital board, it is also required to complete the wiring harness connection for the three of the Micro AutoBox, the controller and the bench equipment(engine and gearbox).3. Make the hardware-in-loop simulation of MicroAutoBox using the AutoBox. Separately, the control model is downloaded to MicroAutoBox, and the object model is downloaded to AutoBox. With the help of real-time platform, before doing the real platform experiment, it is needed to verify the correctness of the control strategy, as early as possible to discovery problems of control strategy, and as soon as possible to solve them. Before simulation, we need to configure the port of the control model and the object model, then make the simulation experiment, at the same time adjust the discomfort in the model.4. The final validation experiment is divided into two parts, one is the engine simulation platform in the laboratory, and the other is the real engine bench test. First, the engine simulation platform can separately test the 8 cylinder pump current drive waveform, and determine the injection timing of the 8 cylinders. It can also detect hardware drive circuit and the quality of wire harness. Subsequently, the verification of the control strategy is done on the real engine bench.