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.

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.

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.

A Theoretical Control Strategy for a Diesel Engine

2005 ◽  
Vol 128 (2) ◽  
pp. 453-457 ◽  
Author(s):  
R. Outbib ◽  
X. Dovifaaz ◽  
A. Rachid ◽  
M. Ouladsine
Keyword(s):  
Diesel Engine ◽  
Engine Speed ◽  
Closed Loop ◽  
Lyapunov Theory ◽  
Loop System ◽  
Control Law ◽  
Closed Loop System ◽  
Nonlinear Method ◽  
New Approach ◽  
Fuel Rate

In this paper we present a theoretical strategy for diesel engine control. More precisely, we propose a new approach to control the speed of the engine using the fuel rate as the control law and we show how this approach can be used to control the opacity. We first establish a mathematical model that describes the behavior of the engine. Afterward, we propose a new nonlinear method to design a controller for a class of nonlinear systems. The proposed method, based on Lyapunov theory, is used to design a smooth feedback law that renders the closed-loop system asymptotically stable around a desired engine speed value. Finally, simulation results are proposed to highlight the performances of the closed-loop system.

Diesel Engine Running at Constant Speed Base on Fuzzy Control Strategy

2015 ◽  
Vol 713-715 ◽  
pp. 893-896
Author(s):  
Fei Wu
Keyword(s):  
Diesel Engine ◽  
Fuzzy Control ◽  
Control Strategy ◽  
Engine Speed ◽  
Functional Relationship ◽  
Control Method ◽  
Oil Quality ◽  
Variation Rate ◽  
Fuzzy Control Strategy

The functional relationship among the cylic oil quality of diesel engine, rack displacement and the engine speed was obtained by Orthogonal Test, significance of the regression equation was test by variance analysis. Based on the model, using the fuzzy control method, the voltage to stepping motor was controlled by the method according to the engine speed and its variation rate, which can controll the diesel engine speed percisely. From the simulation result, it shows that the diesel engine run at the range of the set speed effectively by the fuzzy control strategy, and controlling effect is significant.

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.

The Study on Control Strategy of Rail Pressure in the Starting Process for Common Rail Diesel Engine

2012 ◽  
Vol 588-589 ◽  
pp. 273-277
Author(s):  
Xian Qiang Liu ◽  
Jia Yi Du ◽  
Yin Nan Yuan ◽  
Lei Zhu
Keyword(s):  
High Pressure ◽  
Diesel Engine ◽  
Control Strategy ◽  
Engine Speed ◽  
Initial Period ◽  
Common Rail ◽  
Experimental Results ◽  
Rail Pressure ◽  
Idle Speed ◽  
Starting Process

The analysis on the characteristics of each period in the starting process for common rail diesel engine was carried out. Rail pressure simulation model in the starting process was set by Matlab/Simulink. And rail pressure was tested in 4JB1 high pressure common rail diesel engine. The experimental results showed that idle rail pressure and engine speed fluctuated severely. Solution to correction of duty of metering unit(MeUn) at initial period was proposed, and effect of dragged laps on duty of MeUn was added in control strategy. The improved experimental results showed that amplitude of rail pressure fluctuation was very small and idle speed was no longer overshoot. The performance of diesel engine in the starting process has been greatly improved.

Turbocharged Two-Stroke Diesel Engine of Large Vessels Modeling and Simulation

2012 ◽  
Vol 235 ◽  
pp. 233-238
Author(s):  
Zhe Tian ◽  
Xin Ping Yan ◽  
Ye Ping Xiong
Keyword(s):  
Diesel Engine ◽  
Engine Speed ◽  
Mean Value ◽  
Control Law ◽  
Model Design ◽  
Engine Model ◽  
Speed Controller ◽  
Volume Method ◽  
Method Model ◽  
Large Vessels

In this article, according to the work principle of turbocharged two-stroke diesel engine, the characteristic of volume method model is referenced to package the diesel engine and the packaged model is calculated. According to the Matlab/Simulink software platform, the model will be combined to form a full mean value engine model and join speed controller to control diesel engine speed. The variation of diesel engine’s various performance parameter and the dynamic characteristics based on the speed control law will be observed, which means reaching better purpose of using diesel engine. In the process of mean value engine model design, joining a scavenging coefficient and improving the excess air ratio will increase simulation precision. By means of the correlation analysis, the diesel engine models complying with the control requirements can be determined.

scholarly journals Computer Modelling For 4-Stroke Direct Injection Diesel Engine

2008 ◽  
Vol 33-37 ◽  
pp. 801-806
Author(s):  
Abdul Rahim Ismail ◽  
Rosli Abu Bakar ◽  
Semin Ali ◽  
Ismail Ali
Keyword(s):  
Diesel Engine ◽  
Simulation Study ◽  
Engine Speed ◽  
Computer Modelling ◽  
Direct Injection ◽  
One Dimension ◽  
Effective Pressure ◽  
Operational Parameters ◽  
Direct Injection Diesel Engine ◽  
Theoretical Results

Study on computational modeling of 4-stroke single cylinder direct injection diesel engine is presented. The engine with known specification is being modeled using one dimension CFD GT-Power software. The operational parameters of the engine such as power, torque, specific fuel consumption and mean effective pressure which are dependent to engine speed are being discussed. The results from the simulation study are compared with the theoretical results to get the true trend of the results.

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