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.

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.

Simulations of Engagement Control in Actuated Dry-Clutch: Influence of Frictional Response of Facing Materials

2017 ◽  
Vol 868 ◽  
pp. 15-20
Author(s):  
Adolfo Senatore ◽  
Carmine D'Auria ◽  
Mario Pisaturo
Keyword(s):  
Frictional Coefficient ◽  
Control Unit ◽  
Interface Temperature ◽  
Temperature Estimation ◽  
Start Up ◽  
Clutch Engagement ◽  
Dry Clutch ◽  
Effective Models ◽  
And Control

This paper focuses on the simulation of clutch engagement behavior in automated manual transmissions (AMTs) to virtualize the vehicle start-up maneuver through implementation of the driveline model and the role of transmission control unit featuring different levels of knowledge regarding to clutch material frictional response. Simulation results underline the crucial requirement of accurate prediction of the frictional coefficient evolution in each clutch maneuver, particularly regarding to the interface temperature estimation to develop effective models and control algorithms.

scholarly journals Feedback in Automated Clutch Control Circuit for Truck Start-Up Process

2018 ◽  
Vol 17 (5) ◽  
pp. 421-431 ◽  
Author(s):  
Le Van Nghia
Keyword(s):  
Control System ◽  
Power Unit ◽  
Intelligent Systems ◽  
Mechanical Transmission ◽  
Feedback Parameter ◽  
Start Up ◽  
Control Threshold ◽  
Friction Clutch ◽  
Multidisciplinary Model ◽  
Clutch Control

The paper presents description of a mechatronic control system for mechanical transmission of a 20-ton truck, as well as its adaptive start-up algorithm, transient process behavior which significantly affects durability of automated power unit elements, vehicle movement smoothness and driver’s comfort when driving. A multidisciplinary model of the mechatronic control system has been developed in the software package Imagine Lab AMESim because its power unit including a diesel engine, a dry frictional two-disc clutch, a main mechanical stepped gearbox and an additional gearbox has electrical components besides mechanical and pneumatic ones. The given model allows to test complex control algorithms and analyze the behavior of intelligent systems in the early designing stages. The research has been carried out on the basis of the test complex at Department “Automobiles”, Automotive and Tractor Faculty, Belarusian National Technical University. Research results confirm an adequacy of the AMESim developed multidisciplinary model. Feedback on the increment of an angular velocity difference between driving and driven parts of the friction clutch has been introduced for precise friction clutch control. Threshold values of a feedback parameter have been determined on the basis of the developed computer model and these values will be used for programming a microprocessor unit when implementing an adaptive algorithm for a truck start-up process

scholarly journals Research and Implementation of Tractor Power Shift Clutch Control System

2018 ◽  
Vol 153 ◽  
pp. 04003 ◽  
Author(s):  
Chengjun Li ◽  
Meicong Ke ◽  
Youyu Wu
Keyword(s):  
Control Strategy ◽  
Electronic Control Unit ◽  
Control Unit ◽  
Electronic Control ◽  
Shift Control ◽  
Power Shift ◽  
Key Factor ◽  
Clutch Control ◽  
Shift Clutch

Applying power shift control technology on tractor can improve the power, economy and driving comfort of tractor. The separation and engagement control of clutch in tractor power shift transmission system is the key factor to optimize the quality of shift. Through many experiments and tests, an electronic control unit based on MC9S12 was developed, and an effective clutch control strategy was put forward, which improved the jerk of power shift and shortened the gear shift time.

Dual Clutch Automatic Transmission Two Clutch Starting Control and Simulation

2013 ◽  
Vol 372 ◽  
pp. 538-542
Author(s):  
Guo Zhong Jia ◽  
Xin Ping Wu ◽  
Zhen Hua Jia
Keyword(s):  
Simulation Model ◽  
Control Strategy ◽  
Control Strategies ◽  
Automatic Transmission ◽  
Control Model ◽  
Launch Strategy ◽  
Simulation Results ◽  
Clutch Control ◽  
The Impact ◽  
Starting Control

According to the special structure of DCT, the control strategy of launch with two clutches has been proposed to share the friction work and extend the life of both clutches. The dynamic model of launch with two clutches and the clutch control model have been built. the control strategies of both clutches have been proposed respectively according to the requirement of the different driver intention and the limitation of the impact of vehicle. The simulation model of launch with two clutches has been built using the Matlab/Simulink platform, and the simulation has been carried out. The Simulation results show that the balance of friction work based on this launch strategy with two clutches has been validated.

Engagement Control of Automated Clutch for Vehicle Launching Considering the Instantaneous Changes of Driver's Intention

2016 ◽  
Vol 139 (2) ◽  
Author(s):  
Liang Li ◽  
Zaobei Zhu ◽  
Yong Chen ◽  
Kai He ◽  
Xujian Li ◽  
...  
Keyword(s):  
Control Strategy ◽  
Control Method ◽  
Sliding Mode ◽  
Linear Quadratic Regulator ◽  
Vehicle Speed ◽  
Linear Quadratic ◽  
Clutch Engagement ◽  
Automated Manual Transmission ◽  
Driver’S Intention ◽  
Artificial Neural Network Ann

Engagement control of automated clutch is essential during launching process for a vehicle equipped with an automated manual transmission (AMT), and instantaneous changes in the driver's launching intention make it more complicated to control the clutch. This paper studies the identification of the driver's launching intentions, which may change anytime, and proposes a clutch engagement control method for vehicle launching. First, a launching-intention-aware machine (LIAM) based on artificial neural network (ANN) is designed for real-time tracking and identifying the driver's launching intentions. Second, the optimal engagement strategy for different launching intentions is deduced based on the linear quadratic regulator (LQR), which figures out a compromise between friction loss, vehicle shock, engine speed, clutch speed, and desired vehicle speed. Third, the relationship between transmitted torque and clutch position is obtained by experiments, and a sliding-mode controller (SMC) is designed for clutch engagement. Finally, the clutch engagement control strategy is validated by a joint simulation model and an experiment bench. The results show that the control strategy reflects the driver's launching intentions correctly and improves the performance of vehicle launching.

Starting Control with Constant Engine Speed for AMT Automotive Based on Neural Network

2012 ◽  
Vol 184-185 ◽  
pp. 1637-1642
Author(s):  
Dong Ye Sun ◽  
Xue Feng Zhang ◽  
Qing Lin Wu ◽  
Lei Zhang
Keyword(s):  
Neural Network ◽  
Control Strategy ◽  
Engine Speed ◽  
Accelerator Pedal ◽  
Target Speed ◽  
Starting Time ◽  
The Neural Network ◽  
Clutch Engagement ◽  
Clutch Control ◽  
Starting Control

Starting control with constant engine speed of AMT automotive is a clutch control means based on the target accelerator pedal opening. According to the different accelerator pedal opening, the clutch engagement speed will be different. The neural network is used to estimate the target accelerator pedal opening by the start of the initial accelerator pedal opening variation. Thus completing the engine target speed and clutch engagement speed is to make sure the AMT start fast and smoothly. The results showed that: through estimating the target accelerator pedal opening, this control strategy can shorten the starting time and improved control quality significantly.

scholarly journals Motion Characteristics of a Clutch Actuator for Heavy-Duty Vehicles with Automated Mechanical Transmission

Actuators ◽  
2021 ◽  
Vol 10 (8) ◽  
pp. 179
Author(s):  
Yunxia Li ◽  
Zengcai Wang
Keyword(s):  
Pulse Width Modulation ◽  
Simulation Analysis ◽  
Mechanical Transmission ◽  
Heavy Duty ◽  
Velocity Modulation ◽  
Clutch Engagement ◽  
Motion Characteristics ◽  
Clutch Control ◽  
Engagement And Disengagement ◽  
Heavy Duty Vehicles

Clutch control has a great effect on the starting quality and shifting quality of heavy-duty vehicles with automated mechanical transmission (AMT). The motion characteristics of a clutch actuator for heavy-duty vehicles with AMT are studied in this paper to investigate the clutch control strategy further. The modeling principle of the automatic clutch system is analyzed, and a simulation analysis is given to prove its validity and rationality. Normalized velocity and velocity modulation percentage are proposed as evaluation parameters for the clutch actuator driven by pulse width modulation (PWM) signals. Based on an AMT test bench, the actuator motion characteristics are analyzed. Experimental results show that the range of normalized velocity and velocity modulation percentage are obtained for the clutch engagement and disengagement processes. By analyzing the experimental data, the engaging velocity and disengaging velocity of the actuator are estimated using the solenoid valves in combination. The research results provide a fundamental basis for precise controlling of the clutch and improving the smoothness of heave-duty vehicles.

A Starting Control Strategy of Single-Cylinder Two-Stroke Free-Piston Engine Generator

2020 ◽  
Vol 142 (3) ◽  
Author(s):  
Jinkang Lu ◽  
Zhaoping Xu ◽  
Dong Liu ◽  
Liang Liu
Keyword(s):  
Control Strategy ◽  
Cold Start ◽  
Combustion Model ◽  
Piston Engine ◽  
Free Piston ◽  
Single Cylinder ◽  
Free Piston Engine ◽  
Start Up ◽  
Turning Center ◽  
Starting Process

Abstract Free-piston engine generator is a novel energy conversion system, which is known to have advantages of variable compression ratio and variable fuel. The free-piston must be controlled to overcome challenges like misfire, after-combustion, and other abnormal combustion in the starting process, as well as to prevent the piston from colliding with the cylinder head. This article proposes a control strategy based on the combustion state for the cold start-up process of single-cylinder two-stroke free-piston engine generator. The combustion state is judged based on in-cylinder pressure at the early beginning of expansion stroke, and the duration and direction of coil current are adjusted to ensure the aimed bottom turning center of the stroke. A control-oriented model including the cold start-up combustion model of the prototype is presented, and the control strategy is verified by the experiment of the prototype. The results show that the free-piston engine generator can start successfully and overcome abnormal combustion during the cold start-up process.

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.

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