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.

scholarly journals VLC-Based Car-to-Car Communication

2020 ◽  
Vol 20 (1) ◽  
pp. 16
Author(s):  
Arnez Pramesti Ardi ◽  
Ilham Sukma Aulia ◽  
Rizky Ardianto Priramadhi ◽  
Denny Darlis
Keyword(s):  
Visible Light ◽  
Communication System ◽  
Control Unit ◽  
Visible Light Communication ◽  
Engine Control Unit ◽  
Experimental Results ◽  
Vehicle Speed ◽  
Engine Control ◽  
Infrared Communication ◽  
Car Accidents

Based on data from the Indonesian Traffic Corps by September 2019, the number of car accidents was dominated by rear-hit crashes with 6,966 accidents. Most of these accidents occurred during car convoys. It needs a car-to-car communication to increase driver awareness. One of the technologies that can be applied is Visible Light Communication (VLC) and infrared communication. The transmitted data are the vehicle speed data, throttle position, and brake stepping indicator. The data are obtained by reading the Engine Control Unit (ECU) in the car. The data are packaged from the three data and sent to other cars at day and night using VLC and infrared communication. The experimental results show that in a communication system that uses VLC, data can be exchanged between cars during the day up to 2 meters and at night up to 11 meters. Otherwise, in infrared communication, vehicles can communicate during the day up to 2 meters and at night up to 0.7 meter. The test was also carried out with some conditions such as rain, smoke, passers, and other vehicle lights.

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.

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.

Development of Field Control System of Automated Guided Vehicle Based on Wireless Local Area Network and CAN Bus

2013 ◽  
Vol 579-580 ◽  
pp. 792-797
Author(s):  
Yan Wang ◽  
Zhong Da Yu ◽  
Chen Xing Bao ◽  
Dong Xiang Shao
Keyword(s):  
Control System ◽  
Real Time ◽  
Wireless Local Area Network ◽  
Local Area Network ◽  
Can Bus ◽  
Control Unit ◽  
Local Area ◽  
Automated Guided Vehicle ◽  
Area Network ◽  
Control Units

In this paper, we realize a real-time communication based on wireless local area network (WIFI) and controller area network (CAN) bus and develop a distributed control system for an automated guided vehicle (AGV). The system consists of two levels: (1) communication between AGVs and main computer based on WIFI, (2) communicationg between control units of AGV based on CAN bus. A real-time operating system μC/OS-II was used to control time, which significantly reduces the time for program and improves development efficiency. Finally, a small-size distributed AGV controller is developed as the main control unit of AGV and a distributed I/O system is developed based on it.

Optimal Fuzzy Control of Automated Mechanical Transmission Clutch Engagement during Start-Up Process

2013 ◽  
Vol 694-697 ◽  
pp. 2089-2093 ◽  
Author(s):  
Han Yu Jin ◽  
Xiu Sheng Cheng ◽  
Yong Dao Song
Keyword(s):  
Control Strategy ◽  
Control Unit ◽  
Mechanical Transmission ◽  
Subtle Change ◽  
Start Up ◽  
Clutch Engagement ◽  
Driver’S Intention ◽  
Starting Process ◽  
Clutch Control ◽  
The Impact

Engagement control of the clutch in the starting process is the core part and difficulty of the Automated Mechanical Transmission (AMT) control strategy, which was directly related to the clutch disc lifetime and riding. Engine speed, clutch speed and throttle angle are the only signals to develop clutch control strategy in the entire start-up process made by Transmission Control Unit (TCU) in a vehicle equip with AMT. The TCU even need to determine the driver's intention to select different control schemes. In this paper, fuzzy logic control was adopted in order to eliminate the impact of subtle change during driver operation, thus the start quality was optimized.

Research on the Braking System Control Strategy of Hybrid Electronic Bus

2011 ◽  
Vol 148-149 ◽  
pp. 1231-1235
Author(s):  
Ji Shun Liu ◽  
Jun Li ◽  
Yong Sheng Zhang ◽  
Liang Chu ◽  
Liang Yao
Keyword(s):  
Control Strategy ◽  
Electronic Control Unit ◽  
Control Unit ◽  
Regenerative Braking ◽  
System Control ◽  
Vehicle Speed ◽  
Braking System ◽  
Execution Unit ◽  
Braking Force ◽  
Braking Control

As one of the key technologies of Hybrid Electronic Bus, regenerative braking technology can recover energy without changing the traditional bus braking habit. This is of vital importance in the research of regenerative braking system. Because the braking force distribution relationship between the front and rear axle of the vehicle has a remarkable influence in the braking stability,especially adding the regenerative braking force, the influence is even larger. So the anti-lock braking control strategy for the hybrid electronic vehicle is updated in this paper according to the condition of regenerative braking. The anti-lock braking control and regenerative braking control were integrated in one ECU (Electronic Control Unit) of braking control system, collecting signals of wheel rotate speed, vehicle speed, SOC and brake pedal position by CAN bus. And the output control commands are sent to the execution unit of anti-lock braking system and regenerative braking system. The effectiveness of energy regeneration and the braking stability of this strategy are tested on the off-line simulation platform.

scholarly journals (Semi-)Automatically Parsing Private Protocols for In-Vehicle ECU Communications

Entropy ◽  
2021 ◽  
Vol 23 (11) ◽  
pp. 1495
Author(s):  
Tongtong Chen ◽  
Xiangxue Li
Keyword(s):  
Electronic Control Unit ◽  
Control Unit ◽  
Area Network ◽  
Vehicle Speed ◽  
Electronic Control ◽  
Continuous Variables ◽  
Important Indicator ◽  
Penetration Testing ◽  
Discrete Manner ◽  
Parsing Algorithm

In-vehicle electronic control unit (ECU) communications generally count on private protocols (defined by the manufacturers) under controller area network (CAN) specifications. Parsing the private protocols for a particular vehicle model would be of great significance in testing the vehicle’s resistance to various attacks, as well as in designing efficient intrusion detection and prevention systems (IDPS) for the vehicle. This paper proposes a suite of methods for parsing ECU private protocols on in-vehicle CAN network. These methods include an algorithm for parsing discrete variables (encoded in a discrete manner, e.g., gear state), an algorithm for parsing continuous variables (encoded in a continuous manner, e.g., vehicle speed), and a parsing method based on upper-layer protocols (e.g., OBD and UDS). Extensive verifications have been performed on five different brands of automobiles (including an electric vehicle) to demonstrate the universality and the correctness of these parsing algorithms. Some parsing tips and experiences are also presented. Our continuous-variables parsing algorithm could run in a semi-automatic manner and the parsing algorithm from upper-layer protocols could execute in a completely automatic manner. One might view the results obtained by our parsing algorithms as an important indicator of penetration testing on in-vehicle CAN network.

Integrated Powertrain Control for Gear Shifting

2011 ◽  
Vol 148-149 ◽  
pp. 725-730
Author(s):  
Guo Qiang Wan ◽  
Ying Huang ◽  
Fu Jun Zhang ◽  
Gang Li
Keyword(s):  
Fuel Economy ◽  
Control Strategy ◽  
Experimental Results ◽  
Engine Control ◽  
Transmission Control ◽  
Shift Quality ◽  
Powertrain Control ◽  
Output Torque ◽  
Turbine Speed ◽  
Torque Observer

Drivability and fuel economy are continuously emphasized during the development of automobiles, and shift quality is the most important part of the drivability. To improve the shift quality, the integrated powertrain control strategy for gear shifting is presented in this paper. First of all, the transmission control strategy based on the turbine speed trajectory is proposed. Furthermore, an output torque observer is determined to implement the coordinated engine control, and then the torque based coordinated engine control is presented. Finally, the integrated powertrain control strategy is studied by experiments. The experimental results show that the integrated powertrain control reduces the shift jerk and the dissipated clutch energy during gear shifting.

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