A Study on Shift Process Control of AMT for Battery Electric Bus

2011 ◽  
Vol 88-89 ◽  
pp. 128-133 ◽  
Author(s):  
Hong Bo Liu ◽  
Yu Long Lei ◽  
Yu Zhang ◽  
Xiao Lin Zhang ◽  
You De Li
Keyword(s):  
Electric Vehicles ◽  
Control Strategy ◽  
Mechanical Transmission ◽  
Environment Protection ◽  
Battery Electric Vehicles ◽  
Shift Control ◽  
Shift Performance ◽  
Electric Bus ◽  
Dynamics Models ◽  
Energy Shortage

With ever increasing concerns on energy shortage and environment protection, the development of the battery electric vehicles (BEVs) has taken on an accelerated pace. In this paper, firstly, an AMT (Automatic Mechanical Transmission) without clutch and synchronizer used in battery electric bus is introduced. Then, the dynamics models of the shift process are created, and the factors that affect the shift performance are discussed. Finally, the AMT shift control strategy is designed and applied in the field buses. The on-road tests results show that the shift control strategy is valid and reliable, which meets the vehicle comfort and power requirements.

Hardware-in-the-Loop Test and Failure Mode Simulation for AMT

2012 ◽  
Vol 188 ◽  
pp. 292-299 ◽  
Author(s):  
Zai Min Zhong ◽  
Xue Ping Chen ◽  
Guo Ling Kong ◽  
Xin Bo Chen
Keyword(s):  
Control Strategy ◽  
Failure Modes ◽  
Driving Ability ◽  
Mechanical Transmission ◽  
Extreme Conditions ◽  
Hardware In The Loop ◽  
Test Rig ◽  
Shift Performance ◽  
Time Simulation ◽  
And Control

Control strategy and stability of actuator are highly important for the performance of Automated Mechanical Transmission (AMT). Targeting an electric AMT actuator, this paper sets up a Hardware-in-the-loop (HIL) test rig which is composed of TCU, AMT actuator, dSPACE Simulator, real-time simulation computer and AMT actuator loading simulation electric servo-system. In order to verify actuator and control strategy, the paper carries out several tests in typical driving conditions. it also analyses the shift performance and gives advices on further improvement. This paper lists several failure modes and extreme conditions of AMT. Some of them will be modeled in Simulink, in order to optimize AMT actuator and control strategy while ensuring enough driving ability when AMT is failed or vehicle is driven in extreme conditions.

scholarly journals Shift Force Loading Rules Research for Automated Mechanical Transmission

2015 ◽  
Vol 9 (1) ◽  
pp. 574-578
Author(s):  
Li Bo ◽  
Ge Wenqing ◽  
Zhao Yiqiang ◽  
Chen Shanshi
Keyword(s):  
Control Strategy ◽  
Mechanical Transmission ◽  
Analysis Model ◽  
Force Output ◽  
Three Dimensional Model ◽  
Element Analysis ◽  
Maximum Deformation ◽  
Force Loading ◽  
Shift Control ◽  
Strength And Stiffness

To improve the system reliability and reduce the shift shock of Automated Mechanical Transmission, shift force loading rules is researched on the basis of strength and stiffness analyzing of shift fork. The shift mechanism of A-5- speed manual transmission is used as an example to illustrate the simulation, co-relation and validation of the shift fork strength and stiffness. The three-dimensional model of the shift fork is built and the finite element analysis model based on ABAQUS is established. And then, the influence of strength and stiffness of shift fork on the shift force loading rules can be analyzed. The fork tends to deflect with the synchronizer sleeve during synchronization thus acting as a damper and storing energy, the maximum instantaneous force output by driving device under the strength requirement of shift fork is determined. The shift control strategy is corrected according to the stiffness analysis of shift fork. The results shown that, in order to meet the strength requirement of shift fork, the maximum instantaneous force for the 4 gear fork is 1185.5N. In the same time, the maximum deformation on fork legs is 0.617 mm. The research provides a sufficient theoretical basis for formulating the shift control strategy.

An Investigation on the Effect of Drivetrain Hybridization in a Transit Bus, Series Configuration

2006 ◽  
Author(s):  
Ahmad Khanipour ◽  
Mohsen Esfahanian ◽  
Farhad Sangtarash ◽  
Meisam Amiri
Keyword(s):  
Fuel Consumption ◽  
Electric Vehicles ◽  
Control Strategy ◽  
Control Strategies ◽  
Drive Cycle ◽  
Conventional Vehicle ◽  
Vehicle Engine ◽  
Electric Bus ◽  
Series Configuration ◽  
Hybrid Electric

To achieve higher fuel economy and lower emissions hybridization of conventional vehicles seems to be an effective solution and an important step. In this paper, after a short introduction about the hybrid electric vehicles a brief design of series electric vehicles is introduced. Then one of the Iran-Khodro city buses named O457 is chosen to change to a series hybrid electric bus. After choosing the proper hybrid components the bus performance is investigated to assure whether it can satisfy the required performance or not. Then the conventional O457 and its series configurations for two different control strategies are defined and evaluated using the ADvanced VehIcle SimulatOR, ADVISOR. Simulations are carried out in a combined urban drive cycle because of the lack of a real drive cycle for Tehran city. The fuel consumption and the amount of produced emissions are compared together for three mentioned cases. The validity of simulation has been proved by the close conformity between the value of fuel consumption of the conventional vehicle reported by the company to what has been achieved from the simulation. It is observed that compared to the conventional vehicle, a reduction in fuel consumption about 32% in the maximum SOC control strategy and about 27% in the thermostat control strategy are possible to achieve. In addition, simulation results indicate that air pollution caused by vehicle engine can be greatly reduced through hybridization using each of the mentioned control strategies.

The Study of PHEV Shift Strategy Based on AMT Without Synchronizer

2011 ◽  
Author(s):  
Xiangyu Dong ◽  
Junqiang Xi ◽  
Huiyan Chen
Keyword(s):  
Control Strategy ◽  
Hybrid Electric Vehicle ◽  
Mechanical Transmission ◽  
Dynamics Model ◽  
Parallel Hybrid Electric Vehicle ◽  
Shift Control ◽  
Strategy Model ◽  
Parallel Hybrid ◽  
Axis Parallel ◽  
Shift Strategy

The research is based on single-axis parallel hybrid electric vehicle (PHEV) equipped with AMT (Automatic mechanical transmission). Dynamics model of shift process is established based on the shift control strategy without disengaging the clutch. This paper analyses the active synchronization and shift process. On this basis, the control strategy model of shifting without synchronizer and vehicle model are established respectively by using MATLAB and Cruise. Through the union simulation and analysis of the simulation data, it validates that the control strategy of shifting without synchronizer is feasible.

Study on Control Process of Automatic Mechanical Transmission System for Pure Electric Bus

2012 ◽  
Vol 220-223 ◽  
pp. 1795-1799 ◽  
Author(s):  
Ling Ling ◽  
Zhen Sheng Chen ◽  
Yuan Yue Luo
Keyword(s):  
Control Strategy ◽  
Can Bus ◽  
Control Process ◽  
Mechanical Transmission ◽  
Area Network ◽  
Coordination Control ◽  
Optimum Control ◽  
Evaluation Standards ◽  
Synchronous Motors ◽  
Electric Bus

The vehicle driveline of pure electric bus based on the automatic mechanical transmission (AMT) was introduced and the rationality and necessity of using AMT in electric bus was discussed. The control network structure of vehicle driveline was built in this paper. According to the evaluation standards of automatic gear shifting, that is, the shift time and shift jerk, the optimum control strategy of automatic gear shifting was proposed in terms of the principle and method of adjusting torque and speed of motor. The experimental results indicate that, by the use of the developed gear-shifting control system for pure electric bus with AMT, the coordination control of gear-shifting process between AMT and synchronous motors based on the controller area network (CAN) bus technology can be realized. Consequently, the shifting quality can be improved thus to achieve the predetermined effect.

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