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.

CAN-Bus Communication Design for Automated Mechanical Transmission

2012 ◽  
Vol 241-244 ◽  
pp. 1787-1791
Author(s):  
Hong Kun Zhang ◽  
Wen Jun Li
Keyword(s):  
Communication Protocol ◽  
Can Bus ◽  
Control Unit ◽  
Controller Area Network ◽  
Mechanical Transmission ◽  
Area Network ◽  
Coordination Control ◽  
Transmission Control ◽  
Interface Circuit ◽  
Communication Design

The Transmission Control Unit (TCU) of Automated Mechanical Transmission (AMT) can not only control drive train to shift automatically but also communicate with other controller to achieve coordination control. In this paper, Controller Area Network (CAN) communication of AMT is designed by using Motorola Scalable CAN Module (MSCAN) integrated in MC9S12DP256 Microcontroller. CAN communication protocol, CAN interface circuit and software are developed.

Experimental Study on Engine Control Strategy during Gear Shifting for Vehicles Equipped with Automated Mechanical Transmission

2011 ◽  
Vol 52-54 ◽  
pp. 1199-1205
Author(s):  
Guo Qiang Wan ◽  
Ying Huang ◽  
Fu Jun Zhang ◽  
Tao Cui
Keyword(s):  
Experimental Study ◽  
Control Strategy ◽  
Can Bus ◽  
Control Unit ◽  
Experimental Results ◽  
Mechanical Transmission ◽  
Area Network ◽  
Vehicle Speed ◽  
Engine Control ◽  
Time Operation

This paper presents an experimental study on engine control strategy during gear shifting for a Unimog U4000 equipped with an automated mechanical transmission (AMT) based on the controller area network (CAN) bus. First, an integrated powertrain control system based on the CAN bus is introduced. Second, the ideal AMT gear shifting process is described, and the engine control strategy during gear shifting is proposed. Then, the communication information for the engine control unit (ECU) and transmission control unit (TCU) during gear shifting is determined based on the SAE J1939 protocol. Finally, effectiveness is verified by the experimental results. The experimental results show that: engine control during gear shifting based on the CAN bus can meet the requirement for real-time operation; the engine control strategy presented in this paper during gear shifting can achieve good shift quality with shorter shifting time and less vehicle speed loss.

Time-Optimal Coordination Control for the Gear-Shifting Process in Electric-Driven Mechanical Transmission (Dog Clutch) without Impacts

2020 ◽  
Vol 9 (2) ◽  
pp. 155-168
Author(s):  
Ziwang Lu ◽  
◽  
Guangyu Tian ◽  
Keyword(s):  
Control Strategy ◽  
Position Control ◽  
Control Method ◽  
Synchronization Control ◽  
Mechanical Transmission ◽  
Coordination Control ◽  
Optimal Position ◽  
Drive Motor ◽  
Time Optimal ◽  
Optimal Coordination

Torque interruption and shift jerk are the two main issues that occur during the gear-shifting process of electric-driven mechanical transmission. Herein, a time-optimal coordination control strategy between the the drive motor and the shift motor is proposed to eliminate the impacts between the sleeve and the gear ring. To determine the optimal control law, first, a gear-shifting dynamic model is constructed to capture the drive motor and shift motor dynamics. Next, the time-optimal dual synchronization control for the drive motor and the time-optimal position control for the shift motor are designed. Moreover, a switched control for the shift motor between a bang-off-bang control and a receding horizon control (RHC) law is derived to match the time-optimal dual synchronization control strategy of the drive motor. Finally, two case studies are conducted to validate the bang-off-bang control and RHC. In addition, the method to obtain the appropriate parameters of the drive motor and shift motor is analyzed according to the coordination control method.

Simulation Analysis on Control Strategy of Launch with Two Clutches for Dry DCT

2012 ◽  
Vol 479-481 ◽  
pp. 932-936
Author(s):  
Zhen Jun Liu ◽  
Chuan Bing Ren ◽  
Lei Wang
Keyword(s):  
Control Strategy ◽  
Maximum Degree ◽  
Engine Speed ◽  
Simulation Analysis ◽  
Control Process ◽  
Coordination Control ◽  
Change Rate ◽  
Maximum Change ◽  
Simulation Results ◽  
Control Principle

Based on the control principle with a constant engine speed, the coordination control process between engine and clutches during launching was analyzed. The maximum engaging speed of clutches and the maximum change rate of throttle were calculated with the maximum degree of jerk as the limited condition, and the control strategy of launch with two clutches was established. Genetic algorithm was used to optimize the distribution coefficient of torque between two clutches. The simulation results show that the control strategy of launch with two clutches using two clutches work together and the reasonable distribution of torque could be advantageous for clutches enduring life.

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.

Predictive-model-based dynamic coordination control strategy for power-split hybrid electric bus

2015 ◽  
Vol 60-61 ◽  
pp. 785-798 ◽  
Author(s):  
Xiaohua Zeng ◽  
Nannan Yang ◽  
Junnian Wang ◽  
Dafeng Song ◽  
Nong Zhang ◽  
...  
Keyword(s):  
Predictive Model ◽  
Control Strategy ◽  
Coordination Control ◽  
Hybrid Electric Bus ◽  
Model Based ◽  
Dynamic Coordination ◽  
Electric Bus ◽  
Power Split ◽  
Hybrid Electric

Wind Farm Predictive Coordination Control Strategy

2020 ◽  
Author(s):  
Xue Xia ◽  
Huan Xie ◽  
Tianqi Zhao ◽  
Zesen Wang ◽  
Hao Liang ◽  
...  
Keyword(s):  
Control Strategy ◽  
Wind Farm ◽  
Coordination Control

Design of Environment Monitoring System Based on CAN Bus and Wireless Sensor Networks for Greenhouse

2014 ◽  
Vol 1049-1050 ◽  
pp. 1163-1166
Author(s):  
Bo Chang ◽  
Xin Rong Zhang ◽  
Li Hong Li
Keyword(s):  
Wireless Sensor Networks ◽  
Sensor Networks ◽  
Can Bus ◽  
Environmental Parameters ◽  
Wireless Sensor ◽  
Area Network ◽  
Environment Monitoring ◽  
Effective Solution ◽  
Greenhouse Crops ◽  
Backbone Network

In order to accurately collect the environmental parameters (such as temperature, humidity, illumination, etc.), which influence growth of greenhouse crops, the paper proposed a design for greenhouse environment monitoring based on CAN bus and wireless sensor networks (WSNs). The communication network of the system consists of two parts: the backbone network being constructed by CAN bus and area network being constructed by WSNs. At the same time, the designed of hardware and software about the system is illustrated in detail. System architecture indicates that the system is an effective solution for greenhouse environment monitoring.

Study on Electro-Pneumatic Clutch for Automatic Mechanical Transmission

2011 ◽  
Vol 148-149 ◽  
pp. 1149-1153
Author(s):  
Wu Chao Zhang ◽  
Yong Zhai
Keyword(s):  
Diesel Engine ◽  
Field Experiment ◽  
Control Strategy ◽  
Engine Speed ◽  
Mechanical Transmission ◽  
Control Law ◽  
Clutch Engagement ◽  
Automotive Powertrain ◽  
System Requirements ◽  
Clutch Control

The clutch control is one of the cores and most difficult issues in the development of an AMT system. In this paper the pneumatic clutch engagement characteristic is analyzed. Thereto, a simulation model of an automotive powertrain comprises a diesel engine, drivetrain and wheels driving a vehicle through tire-road adhesion are built using Matlab/Simulink. In the simulation, a refined control law of constant engine speed in part process is proposed and tested. The engaging speed and displacement of the clutch vary with the accelerate paddle opening, engine speed, clutch driven plate speed and gears according the control law. Field experiment results show that the control strategy fulfills the system requirements.

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