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Thirty driving cycles are screened from forty three driving cycles provided in ADVISOR. All the maximum vehicle traction power requirement of the thirty driving cycles calculated on the basis of dynamics theory are less than vehicle actual traction power. Statistical results show that sedan HEV (hybrid electric vehicle)'s ideal proportion of the city driving, suburban driving and highway driving is...
A parallel type hybrid-electric bus model is constructed to study hybrid powertrain and its sub-systems. The model is a forward-looking model based on LabVIEW simulation module. The engine, clutch and battery model were specially designed according to the target powertrain. Each part of the model is separately validated by test bench experiment. Part model behavior is compared with that of real target...
The construction of a model that represents the behavior of an Electric Vehicle is studied in detail. The contribution of this work is twofold. On one hand an efficient and compact way to model dynamical systems is introduced. On the other hand, the power interchange between the electrical and mechanical sub-models allows a deep understanding of the dynamics involved in electrically driven vehicles...
The parameter optimization for parallel hydraulic hybrid vehicle(PHHV) system has a significant impact on the vehicle dynamic performance, fuel economy and emission. In this article, several factors affecting system efficiency are used as the objective functions, system parameters are used as the independent variables, and the multi-objective optimization process is compiled in MATLAB. The process...
Electrotic Power Steeritg system is a closed loop cottrolled steeritg system came to use a few years ago. It this paper the performatce of EPS system is studied to geterate assist torque it differett types of drivitg situati ots. As assist torque is depetd ot vehicle velocity atd steeritg w heel's torque, these two are used as cottroller's itput.
Regarding limitation of fossil fuels and the high consumption rate of this energy for transportation, inclination of vehicle industry toward other sources of energy is inevitable. Electric vehicles and hybrid vehicles could be a good solution. Thanks to the state of art of electric motors, power electronics, embedded power train controller and energy storage systems like batteries, the performance...
The vehicles in non-steady working condition often suffer the trade-off between power performance and fuel economy and also the lack of accurate ratio control target in the control strategy. With the analysis of power performance and economic performance and a driveline model with MATLAB/Simulink based on experiment data, the optimum matching datasheet control strategy is proposed. The relationship...
Electric Power Steering (EPS) has important significance in improving the auto's dynamic and static performances. This paper deals with the mathematical model and characteristic curves of EPS System. First, the principle and structure of EPS are discussed. Then the characteristics of EPS system are analyzed, including the typical power curves which deal the relationship of the assist torque and the...
The application of lock-up clutch in hydraulic torque converter means an essential improvement of transmission technology to vehicle. Based on engine and torque converter characteristics, this article introduces a method to get a locking-up control algorithm of hydraulic torque converter through MATLAB programming. The analysis of locking-up process is presented at first, following the establishment...
This study discusses the construction of an electric motorcycle simulation system. It is applicable for childrenpsilas toy motorcycles and adultspsila motorcycles, and also is a reference for constructing larger electric vehicles. The complete model of the electric motorcycle is established by establishing models of individual components (such as battery, motor, transmission, etc.) based upon their...
In automotive applications, effective and affordable acquirement of drive shaft torque value could greatly benefit the vehicle driveline feedback control. This paper presents a model-based torque observer to estimate the drive shaft torque using transmission output shaft angular speed and driven wheel angular speed. A detailed drive line model used for characterizing the behavior of the HEV driveline...
The aim of this paper is to present a method to carry out a vehicle transmission simulator coupled to a vehicle dynamic model. The transmission simulator uses electric actuators with dedicated control laws to reproduce the mechanical characteristics of the real vehicle transmission chain. The vehicle dynamic model, takes into account the longitudinal, the vertical and the pitch motions. The coupled...
The aim of this paper is to present a method to carry out a vehicle transmission simulator coupled to a vehicle dynamic model. The transmission simulator uses electric actuators with dedicated control laws to reproduce the mechanical characteristics of the real vehicle transmission chain. In order to improve the control law robustness of this electric simulator a sliding mode control is used. The...
According to the design requirements, the powertrain dynamic simulation model of an integrated starter/generator (ISG) hybrid electric vehicle (HEV) was established using Simulink. The parallel electric assist control strategy (PEACS) was researched and designed in this paper. The analysis of dynamics performance and fuel economy of the model was carried out under the FTP drive cycle, which can provide...
To accomplish the demand of minimum fuel consumption and good power performance for continuously variable transmission (CVT) car. Aiming at the whole vehicle model including the engine, the clutch and the CVT, the dynamics mathematical model of CVT system is established according to different stages of clutch engaging, that the dynamic integrated simulation model is developed. A parameter self-adjusting...
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