scholarly journals Study on Drive System of Hybrid Tree Harvester

2017 ◽  
Vol 2017 ◽  
pp. 1-7
Author(s):  
Shen Rong-feng ◽  
Zhang Xiaozhen ◽  
Zhou Chengjun
Keyword(s):  
Diesel Engine ◽  
Engine Speed ◽  
Forest Harvesting ◽  
Drive System ◽  
Electric Motors ◽  
Additional Energy ◽  
Uneven Terrain ◽  
Ground Pressure ◽  
Main Component ◽  
Avl Cruise

Hybrid tree harvester with a 60 kW diesel engine combined with a battery pile could be a “green” forest harvesting and transportation system. With the new design, the diesel engine maintains a constant engine speed, keeping fuel consumption low while charging the batteries that drive the forwarder. As an additional energy saving method, the electric motors work as generators to charge the battery pile when the vehicle moves downhill. The vehicle is equipped with six large wheels providing high clearance over uneven terrain while reducing ground pressure. Each wheel is driven via a hub gear by its own alternating current motor, and each of the three wheel pairs can be steered independently. The combination of the diesel engine and six electric motors provides plenty of power for heavy lifting and pulling. The main component parameters of the drive system are calculated and optimized with a set of dynamics and simulated with AVL Cruise software. The results provide practical insights for the fuel tree harvester and are helpful to reduce the structure and size of the tree harvester. Advantage Environment provides information about existing and future products designed to reduce environmental impacts.

Simulation and Analysis of Variable Valve System Based on Diesel Engine

2014 ◽  
Vol 556-562 ◽  
pp. 1271-1277 ◽  
Author(s):  
Long Yin ◽  
Dong Jian Zeng ◽  
Yi Zeng Peng
Keyword(s):  
Diesel Engine ◽  
Simulation Model ◽  
Engine Speed ◽  
Drive System ◽  
Variable Valve Timing ◽  
Valve Timing ◽  
Experiment Data ◽  
Valve System ◽  
Valve Drive ◽  
Variable Valve

The necessity and superiority of using variable valve system on diesel is described detailed. The design of electro-hydraulic variable valve drive system is introduced based on DK4A diesel engine, then the mathematical simulation model of the electro-hydraulic variable valve drive system is undertook by Simulink in order to study the movement of the intake valve. The results show the design of variable valve system can achieve the variable valve timing continuous vary in different engine speed and respond quickly. Further, the simulation model of the diesel engine is built by GT-POWER, and then the accuracy of the model is verified according to the experiment data. Lastly the intake performance of the variable valve system in different out flowing phase is analyzed through the GT-POWER model. The results show that when the engine speed at 2000RPM, 2800RPM, 3600RPM, out flowing phase behind 60oCA, 45oCA, 35oCA after intake TDC respectively ,the amount of intake air decreases with the increase of the out flowing phase, the amount of intake air has been effectively controlled by variable valve system.

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.

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.

A Spray-Droplet Model for Diesel Combustion

1969 ◽  
Vol 184 (10) ◽  
pp. 28-35 ◽  
Author(s):  
J. Shipinski ◽  
P. S. Myers ◽  
O. A. Uyehara
Keyword(s):  
Experimental Data ◽  
Diesel Engine ◽  
Heat Release ◽  
Engine Speed ◽  
Chamber Pressure ◽  
Gas Temperature ◽  
Single Droplet ◽  
Burning Rates ◽  
Burning Model ◽  
The One

A spray-burning model (based on single-droplet theory) for heat release in a diesel engine is presented. Comparison of computations using this model and experimental data from an operating diesel engine indicate that heat release rates are not adequately represented by single-droplet burning rates. A new concept is proposed, i.e. a burning coefficient for a fuel spray. Comparisons between computations and experimental data indicate that the numerical value of this coefficient is nearly independent of engine speed and combustion-chamber pressure. However, the instantaneous value of the spray burning coefficient is approximately proportional to the instantaneous mass-averaged cylinder gas temperature to the one-third power.

scholarly journals Evaluation of diesel engine using Jatropha curcas oil base fuel under a constant speed condition

2021 ◽  
Vol 2 (1) ◽  
pp. 017-026
Author(s):  
Chilakpu ◽  
Kingsley Ogueri
Keyword(s):  
Diesel Engine ◽  
Jatropha Curcas ◽  
Engine Speed ◽  
Batch Reactor ◽  
High Viscosity ◽  
Speed Test ◽  
System A ◽  
Frictional Wear ◽  
Wear And Tear ◽  
Speed Level

A two stage esterification process was adopted in producing biodiesel from Jatropha curcas seed oil in a modified batch reactor. The produced fuel was washed and dried before testing it in an unmodified single stroke diesel engine. 10 liters of biodiesel was measured into five containers and blended with fossil diesel at various percentages for optimal performance in the following order; 10% (B10), 20% (B20), 50% (B50) and 70% (B70) while the fifth container was used as control at 100% biodiesel (B100). Constant engine speed test was conducted to investigate the performance of the produced fuel at known operational speeds of most farm machines. Two engine speeds were selected (2000rpm and 1500rpm). Each speed level was selected on the engine when no extra load was on it, then load from the dynamometer was gradually imposed on the system. A drop in speed was noticed and the engine was raised back to the selected speed. It was allowed to stabilize for about 3minutes before recording the spring readings on the tension side of the belt (F₁), and that on the slack side of the belt (F₂), and torque (T) on the belt and other parameters were deduced. The result of the experiment showed the high torque delivering ability of biodiesel and its blends (B10 & B20) and their ability to protect the enginewhile in operationby reducing frictional wear and tear given its high viscosity.

One-Dimensional Simulation of the Combustion Process in an Engine Cylinder with Ethanol

2014 ◽  
Vol 660 ◽  
pp. 447-451
Author(s):  
Akasyah M. Kathri ◽  
Rizalman Mamat ◽  
Amir Aziz ◽  
Azri Alias ◽  
Nik Rosli Abdullah
Keyword(s):  
Diesel Engine ◽  
Alternative Fuels ◽  
Engine Speed ◽  
Combustion Process ◽  
Cylinder Pressure ◽  
Ethanol Fuel ◽  
One Dimensional ◽  
Engine Cylinder ◽  
Dimensional Simulation ◽  
The One

The diesel engine is one of the most important engines for road vehicles. The engine nowadays operates with different kinds of alternative fuels, such as natural gas and biofuel. The aim of this article is to study the combustion process that occurs in an engine cylinder of a diesel engine when using biofuel. The one-dimensional numerical analysis using GT-Power software is used to simulate the commercial four-cylinder diesel engine. The engine operated at high engine load and speed. The ethanol fuel used in the simulation is derived from the conventional ethanol fuel properties. The analysis of simulations includes the cylinder pressure, combustion temperature and rate of heat release. The simulation results show that in-cylinder pressure and temperature for ethanol is higher than for diesel at any engine speed. However, the mass fraction of ethanol burned is similar to that of diesel. MFB only affects the engine speed.

Marine Diesel Engine Speed Control System Based on Fuzzy-PID

2012 ◽  
Vol 152-154 ◽  
pp. 1589-1594 ◽  
Author(s):  
Xiao Qun Shen ◽  
Yu Xiang Su
Keyword(s):  
Control System ◽  
Diesel Engine ◽  
Pid Control ◽  
Engine Speed ◽  
Speed Control ◽  
Marine Diesel Engine ◽  
Fuzzy Pid ◽  
Speed Governor ◽  
Speed Control System ◽  
Marine Diesel

The traditional PID control effect is not ideal when the controlled object is nonlinear and contains variable parameters. In order to adapt marine diesel engines to variable working conditions, the fuzzy-PID control method was proposed to be used in the speed control system of marine diesel engine to realize online adjustment of PID parameters. The composition of marine diesel engine speed control system was introduced, and the design of fuzzy–PID controller was analyzed in detail. The fuzzy-PID diesel engine speed governor was simulated through MATLAB. The simulation results show that fuzzy-PID can improve the system dynamic performance, reduce system oscillation and improve the response speed. The results also show that the fuzzy-PID marine diesel engine speed governor has high anti-interference ability and strong robustness.

A Study on Cylinder Bore Deformation of a Diesel Engine With Dry Liner Structure

2001 ◽  
Author(s):  
Shigeto Yamamoto ◽  
Hiroshi Sakita ◽  
Masaaki Takiguchi ◽  
Shinichi Sasaki
Keyword(s):  
Thermal Expansion ◽  
Diesel Engine ◽  
Room Temperature ◽  
Engine Speed ◽  
Cylinder Liner ◽  
Cylinder Block ◽  
Cylinder Pressure ◽  
Engine Operation ◽  
Actual Operation ◽  
Cylinder Bore

Abstract The deformation of the cylinder liner of a diesel engine in actual operation have been measured by the means of a rotary piston, and the deformation has been compared with those measured statically at room temperature. As a result, it is found that the deformation of the liner in engine operation is hardly affected by the deformation at room temperature, but it follows the deformation of the cylinder block where the liner is inserted. It is also found as follows: The deformation of the liner upper portion varies according to the head bolts and the engine load, while the effect of the cylinder pressure is insignificant. The deformation at the middle of the liner changes mainly by the thermal expansion in the thrust direction, while the deformation at the lower portion is not affected by the engine speed or the load.

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