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Real Time Simulation Method Research of Automatic Transmission Driveline System

Author: HuangZuo
Tutor: ZhanJun
School: Jilin University
Course: Vehicle Engineering
Keywords: Driveline model Modular Lock-up clutch model Automatic transmission model Limited slip differential model
CLC: U463.2
Type: Master's thesis
Year: 2011
Downloads: 183
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Abstract

Acceleration auto automobile power is one of the five performance, accurate simulation acceleration performance, especially acceleration dynamic process and its impact on the handling and stability has been a vehicle dynamics modeling and simulation of one of the key areas of research. Combined with Jilin University Automotive Simulation and Control State Key Lab of automotive development model to improve the dynamic driving simulator model simulation accuracy and extended application of working conditions, the completion of this study: the research compared the powertrain modeling approach Based on the analysis in the phase to establish a suitable powertrain driving simulator real-time simulation model; driveline modular analysis, implementation driveline module unified interface to facilitate different forms of modeling and driveline replacement; research comparing the torque converter The modeling method, and to achieve separation based on static and dynamic friction torque converter lockup clutch modeling; research comparing different types of modeling principles of limited slip differential, and its impact on the handling and stability; final with commercial software Carsim comparing simulation results verify the correctness and accuracy of the model. Powertrain modeling method. The first survey compared the driveline real-time simulation modeling approach based on status and stall torque converter state phase analysis carried out on the train, on the different phases of the power train passing state of motion and constraints for a detailed calculation of torque The analysis, based on the analysis in the phase of this paper presents two degrees of freedom powertrain model. Studied modular driveline model. Based on the analysis in the phase to determine the movement between each module and torque transmission between the modular interface definitions laid the foundation; followed the same functions as part of the package for the same modules, namely: the torque converter module, transmission module , actuator module and differential modules, each module defines functions and unified interface. Automatic transmission system modeling method. Research compared the torque converter modeling methods, and on this basis, the establishment of a torque converter with a characteristic curve describes the steady state characteristics of the pump wheel turbine end, with the separation model describes the static and dynamic friction lock-up clutch slipping and lockup torque converter dynamic process model, and based on two parameters of the law of automatic shifting automatic transmission model. Studied the limited slip differential modeling method. Several typical limited slip differential (friction-type, viscosity, and differential lock type clutch) modeling methods were compared, respectively, to model and analyze the performance of the vehicle's power and driving stability. Driveline model simulation and verification. The driveline model by defining the input and output interfaces with the engine model and the model of the vehicle is connected to 7 degrees of freedom is 9 degrees of freedom model in visual studio environment prepared by c program to be implemented. For vehicle power acceleration and handling stability condition simulation and the simulation results with commercial software CarSim simulation results comparing the models obtained simulation results are consistent with the conclusions of CarSim to verify the accuracy and precision of the model. By defining the driveline while modular, simple and convenient replacement of the differential gear subsystem and power subsystem and steering stability analysis conditions through comparison shows different forms of power transmission system of the car and handling stability resistance of.

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