A Nonlinear, Transient, Single-Cylinder Diesel Engine Simulation for Predictions of Instantaneous Engine Speed and Torque

2000 ◽  
Vol 123 (4) ◽  
pp. 951-959 ◽  
Author(s):  
Z. S. Filipi ◽  
D. N. Assanis
Keyword(s):  
Diesel Engine ◽  
Angular Velocity ◽  
Engine Speed ◽  
Shaft Speed ◽  
Engine Operation ◽  
Transient Model ◽  
Velocity Fluctuations ◽  
Single Cylinder ◽  
Engine Simulation ◽  
Non Linear

A non-linear, transient, single-cylinder diesel engine simulation has been developed for predictions of instantaneous engine speed and torque. The foundation of our model is a physically based, thermodynamic, steady-state diesel engine simulation (Assanis, D. N., and Heywood, J. B., 1986, “Development and Use of a Computer Simulation of the Turbocompounded Diesel System for Engine Performance and Component Heat Transfer Studies,” SAE Paper 860329), which has been comprehensively validated for various engine designs. The transient extension of the parent model represents the diesel engine as a non-linear, dynamic system. The instantaneous crank-shaft speed is determined from the solution of the engine-external load dynamics equation, where the engine torque is tracked on a crank-angle basis. Validation of the transient model during rapid engine acceleration shows that both the cyclic fluctuations in the instantaneous crank-shaft speed line and the overall engine response are in good agreement with experimental measurements. Predictions of single-cylinder engine starting reveals the importance of selecting the proper value of the engine moment of inertia in order to control the amplitude of angular velocity fluctuations and ensure stable engine operation. It is further shown that the variation in the inertial forces on the reciprocating components with speed has a dramatic impact on the instantaneous torque profile, and consequently on angular velocity fluctuations.

Investigation of Acceleration of Turbocharged Diesel Engine

2001 ◽  
Author(s):  
Ales Hribernik ◽  
Gorazd Bombek ◽  
Ferdinand Trenc
Keyword(s):  
Diesel Engine ◽  
Engine Speed ◽  
Time History ◽  
Boost Pressure ◽  
Turbocharged Diesel Engine ◽  
Engine Simulation ◽  
Pressure Time ◽  
Acceleration Model ◽  
Non Linear ◽  
Comparison Of The Results

Abstract Acceleration of a 4-cylinder, 7-litre, turbocharged diesel engine has been investigated by the means of experimental and analytical procedure. The engine acceleration on a test stand has been tested using standard dynamometer which has been controlled by a computer. All measurements have been performed at the maximum fuel rack position, however the courses of engine load have been varied. Engine speed, dynamometer load, in-cylinder pressure and boost pressure-time history, have been measured during acceleration in order to acquire the data for validation of engine acceleration model. A non-linear, transient, multi-cylinder, turbocharged, diesel engine simulation has been developed for predictions of instantaneous engine and turbocharger speed and torque. The foundation of the model is a thermodynamic, steady state diesel engine simulation. The transient extension of the original model represents the diesel engine as a non-linear, dynamic system. The predictions of engine simulation model agree fairly well with experimental results and may be used for case studies of engine acceleration. As an example the model has been used to study the influence of manifold-pressure compensator (LDA-system) on the acceleration of turbocharged diesel engine. The original LDA-system has been modified and the comparison of the results predicted by the application of original and modified LDA system has been done.

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.

An Experimental Study on Fuel Economy Improvement of a Marine Diesel Engine Using a Sequential Turbocharging System

2018 ◽  
Author(s):  
Hechun Wang ◽  
Xiannan Li ◽  
Yinyan Wang ◽  
Hailin Li
Keyword(s):  
Diesel Engine ◽  
Fuel Economy ◽  
Diesel Engines ◽  
Engine Speed ◽  
Single Stage ◽  
Marine Diesel Engine ◽  
Nox Emissions ◽  
Engine Operation ◽  
Marine Diesel ◽  
High Torque

Marine diesel engines usually operate on a highly boosted intake pressure. The reciprocating feature of diesel engines and the continuous flow operation characteristics of the turbocharger (TC) make the matching between the turbocharger and diesel engine very challenging. Sequential turbocharging (STC) technology is recognized as an effective approach in improving the fuel economy and exhaust emissions especially at low speed and high torque when a single stage turbocharger is not able to boost the intake air to the pressure needed. The application of STC technology also extends engine operation toward a wider range than that using a single-stage turbocharger. This research experimentally investigated the potential of a STC system in improving the performance of a TBD234V12 model marine diesel engine originally designed to operate on a single-stage turbocharger. The STC system examined consisted of a small (S) turbocharger and a large (L) turbocharger which were installed in parallel. Such a system can operate on three boosting modes noted as 1TC-S, 1TC-L and 2TC. A rule-based control algorithm was developed to smoothly switch the STC operation mode using engine speed and load as references. The potential of the STC system in improving the performance of this engine was experimentally examined over a wide range of engine speed and load. When operated at the standard propeller propulsion cycle, the application of the STC system reduced the brake specific fuel consumption (BSFC) by 3.12% averagely. The average of the exhaust temperature before turbine was decreased by 50°C. The soot and oxides of nitrogen (NOx) emissions were reduced respectively. The examination of the engine performance over an entire engine speed and torque range demonstrated the super performance of the STC system in extending the engine operation toward the high torque at low speed (900 to 1200 RPM) while further improving the fuel economy as expected. The engine maximum torque at 900 rpm was increased from 1680Nm to 2361 Nm (40.5%). The average BSFC over entire working area was improved by 7.4%. The BSFC at low load and high torque was significantly decreased. The application of the STC system also decreased the average NOx emissions by 31.5% when examined on the propeller propulsion cycle.

Pengaruh Knalpot Particulate Trap Berbahan Dasar Kuningan Terhadap Tingkat Kebisingan Pada Mesin Diesel Stasioner

2017 ◽  
Vol 8 (2) ◽  
pp. 73-77
Author(s):  
Muhammad Fakhrurozi ◽  
Askan Askan
Keyword(s):  
Diesel Engine ◽  
Side Effects ◽  
Noise Level ◽  
Engine Speed ◽  
Exhaust Gas ◽  
Noise Levels ◽  
Correct Position ◽  
Engine Operation ◽  
Maintenance Schedule ◽  
Operation And Maintenance

The development of technology and industry has also affected the level of pollution. Side effects that are very influential on human health include the level of noise that comes out of the exhaust gas (exhaust). Sound pollution comes from either gasoline-fueled or diesel-fueled engine vehicles, especially in diesel engines. To reduce noise levels there are several ways that can be done; (1) Giving a silencer to the engine, (2) Designing a muffler on the exhaust gas line, (3) Placing the sound source in the correct position, and (4) Setting the engine operation and maintenance schedule. One way to reduce the noise level in a diesel engine is to trap a particulate trap installed in the exhaust gas (exhaust). This method can reduce the gas particles from combustion to the disposal process, so that the noise level can be reduced. The purpose of this study was to determine how much influence the installation of particulate trap made of brass metal in the exhaust of a diesel engine to the level of noise caused. This study uses a factorial type random design by varying the weight of the active ingredient of metal particulate trap 200gr, 300gr, 400g at engine speed between 900-1700rpm. The results of this study indicate that the lowest noise level is obtained from a 300 gr particulate trap ranging from 79.3 dB - 79.4 dB.

scholarly journals Performance of a drop-in biofuel emulsion on a single-cylinder research diesel engine

2016 ◽  
Vol 166 (3) ◽  
pp. 9-16
Author(s):  
Maria Bogarra-Macias ◽  
Omid Doustdar ◽  
Mohammed Fayad ◽  
Miroslaw Wyszyński ◽  
Athanasios Tsolakis ◽  
...  
Keyword(s):  
Diesel Engine ◽  
Fuel Consumption ◽  
Research Work ◽  
Pyrolysis Product ◽  
High Energy ◽  
Waste To Energy ◽  
Gaseous Emissions ◽  
Pyrolysis Oil ◽  
Engine Operation ◽  
Single Cylinder

Current targets in reducing CO2 and other greenhouse gases as well as fossil fuel depletion have promoted the research for alternatives to petroleum-based fuels. Pyrolysis oil (PO) from biomass and waste oil is seen as a method to reduce life-cycle CO2, broaden the energy mix and increase the use of renewable fuels. The abundancy and low prices of feedstock have attracted the attention of biomass pyrolysis in order to obtain energy-dense products. Research has been carried out in optimising the pyrolysis process, finding efficient ways to convert the waste to energy. However, the pyrolysis products have a high content in water, high viscosity and high corrosiveness which makes them unsuitable for engine combustion. Upgrading processes such as gasification, trans-esterification or hydro-deoxynegation are then needed. These processes are normally costly and require high energy input. Thus, emulsification in fossil fuels or alcohols is being used as an alternative. In this research work, the feasibility of using PO-diesel emulsion in a single-cylinder diesel engine has been investigated. In-cylinder pressure, regulated gaseous emissions, particulate matter, fuel consumption and lubricity analysis reported. The tests were carried out of a stable non-corrosive wood pyrolysis product produced by Future Blends Ltd of Milton Park, Oxfordshire, UK. The product is trademarked by FBL, and is a stabilized fraction of raw pyrolysis oil produced in a process for which the patent is pending. The results show an increase in gaseous emissions, fuel consumption and a reduction in soot. The combustion was delayed with the emulsified fuel and a high variability was observed during engine operation.

Influence of Engine Speed on Gasoline Compression Ignition (GCI) Combustion in a Single-Cylinder Light-Duty Diesel Engine

2017 ◽  
Author(s):  
Harsh Goyal ◽  
Sanghoon Kook ◽  
Evatt Hawkes ◽  
Qing Nian Chan ◽  
Srinivas Padala ◽  
...  
Keyword(s):  
Diesel Engine ◽  
Engine Speed ◽  
Compression Ignition ◽  
Single Cylinder ◽  
Light Duty

Turbocharging a Medium Speed Diesel Engine to Suit Different Applications

2001 ◽  
Author(s):  
Andrei Ludu ◽  
Gernot Athenstaedt ◽  
Stephen G. Dexter
Keyword(s):  
Power Generation ◽  
Diesel Engine ◽  
Engine Speed ◽  
Engine Performance ◽  
Fine Tuning ◽  
Engine Operation ◽  
Application Range ◽  
Drilling Rig ◽  
Marine Propulsion ◽  
Medium Speed

Abstract The turbocharger match plays a key role for a successfully developed engine. Properly matched turbochargers ensure a good gas exchange, the right air flow rates, and air-fuel ratios as required for the combustion fine tuning. AVL LIST GmbH in Graz, Austria, starting from a blank computer display, designed, developed and tested a medium speed diesel engine to cover three applications: power generation, marine propulsion and drilling rig drive. The 12 cylinder vee engine has 2370 HP rated power at 1500 rpm rated engine speed. For the drilling rig drive application 8% torque backup at low engine speed is available. The turbocharging challenge was to specify a turbocharger to suit all three applications. Thus, the turbocharger operation ranged from the constant engine speed operation for power generation, to variable engine speed operation for marine propulsion and with torque backup for the drilling rig drive application. The paper reports test results which demonstrate that AVL could match the engine over a wide application range. The engine performance and system layout calculations performed prior to testing were validated by tests. The engine performance software used is presented. A special emphasis is placed on the implementation, operation and impact of a bypass and waste-gate system as an aid to match the turbocharger for the engine operation with torque back-up.

Detailed analytical model of a single-cylinder diesel engine in the crank angle domain

2001 ◽  
Vol 215 (11) ◽  
pp. 1197-1216 ◽  
Author(s):  
Y. H. Zweiri ◽  
J. F. Whidborne ◽  
L. D. Seneviratne
Keyword(s):  
Diesel Engines ◽  
Engine Speed ◽  
Friction Model ◽  
Operating Conditions ◽  
Thermodynamic Control ◽  
Single Cylinder ◽  
Crank Angle ◽  
Non Linear ◽  
Control Volumes ◽  
Good Agreement

A detailed analytical non-linear dynamic model for single-cylinder diesel engines is developed. The model describes the dynamic behaviour between fuelling and engine speed and includes models of the non-linear engine and dynamometer dynamics, the instantaneous friction terms and the engine thermodynamics. The model operates in the crank angle domain. The dynamometer model enables the study of the engine behaviour under loading. The instantaneous friction model takes into consideration the viscosity variations with temperature. Inertia variations with piston pin offset are presented. In-cycle calculations are performed at each crank angle, and the correct crank angles of ignition, speed variations, fuel supply and air as well as fuel burning rate are predicted. The model treats the cylinder strokes and the manifolds as thermodynamic control volumes by using the filling and emptying method. The model is validated using experimentally measured cylinder pressure and engine instantaneous speeds, under transient operating conditions, and gives good agreement. The model can be used as an engine simulator to aid diesel engines control system design and fault diagnostics.

Effects of Injection Pressure on Output Power, BTE, SFC and Opacity in a Typical Single-Cylinder Diesel Engine

2020 ◽  
Vol 3 (1) ◽  
pp. 20-26
Author(s):  
Farid Majedi ◽  
Denik Setiyaningrum ◽  
Setyono M. T. Hidayahtullah ◽  
Aries Abbas
Keyword(s):  
Diesel Engine ◽  
Fuel Consumption ◽  
Output Power ◽  
Thermal Efficiency ◽  
Engine Speed ◽  
Injection Pressure ◽  
Specific Fuel Consumption ◽  
Brake Thermal Efficiency ◽  
Single Cylinder ◽  
Load Variations

On a single-cylinder diesel engine, injection pressure can be adjusted by changing the thickness of the injector shim. In this study, the injection pressure of 180 bar (standard), 190 bar (+1mm shim), and 210 bar (+2mm shim) was examined on a typical single-cylinder diesel engine with pure diesel fuel. The tests carried out at a constant engine speed of 1500 rpm with load variations of 650, 1300, 1950, and 3600 Watts to investigate the effect of injection pressure on output power, brake thermal efficiency (BTE), specific fuel consumption (SFC) and opacity. The results showed that increasing injection pressure could increase the output power by 19.3% and 17.4% by adding 1 mm and 2 mm shims, respectively. SFC decreased 1.97% and 12.3% compared to standard conditions and opacity with 2 mm shim was lower than 1 mm shim. In conclusion, increasing the injection pressure from 180 to 210 bar by adding 2 mm shim can improve the performance of a single cylinder diesel engine, which includes output power, brake thermal efficiency (BTE), specific fuel consumption (SFC) and opacity.

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