scholarly journals INFLUENCE OF THE BIODIESEL FUELS WITH MULTIFUNCTIONAL ADDITIVES ON THE DIESEL ENGINE EFFICIENCY

2015 ◽  
Author(s):  
Renaldas BARANAUSKAS ◽  
Risto ILVES ◽  
Arne KÜÜT ◽  
Jüri OLT
Keyword(s):  
Diesel Engine ◽  
Fuel Consumption ◽  
Engine Speed ◽  
Repeated Loading ◽  
Exhaust Gas ◽  
Maximum Torque ◽  
Engine Efficiency ◽  
Multifunctional Additives ◽  
Biodiesel Fuels

The article presents the tests of the engine Valmet 320 DS installed in the teststand "Schenck Dynas3 LI 250". For these tests biodiesel produced by JSC Rapsoila was used. The test was carried out causing the engine speed to 2600 rpm and loading gradually to maximum. Torque (Te), engine speed (ne), fuel consumption (Bf), the pressure in the cylinder (Pe) and exhaust gas CO, CO2, O2, HC, NOx were measured. Initially, measurements were carried out using biodiesel (RME). After that, biodiesel was added with the additive Valvoline VPS HD Diesel System Complete keeping a ratio of 100:1. In order to evaluate the effects of additives the engine was working two hours using biodiesel and additive mixture. After two hours the measurements were repeated loading the engine in the same mode. The work presents the results of tests carried out.

An Experimental Study on the Performance and Emissions of Diesel Engine Fuelled with Biodiesel Derived from Palm Oil

2014 ◽  
Vol 699 ◽  
pp. 654-659 ◽  
Author(s):  
M. Jaat ◽  
Amir Khalid ◽  
B. Manshoor ◽  
Him Ramsy ◽  
Norrizal Mustaffa
Keyword(s):  
Diesel Engine ◽  
Fuel Consumption ◽  
Palm Oil ◽  
Engine Speed ◽  
Consumption Rate ◽  
Biodiesel Blends ◽  
Fuel Consumption Rate ◽  
Brake Power ◽  
Smoke Opacity ◽  
Biodiesel Fuels

The use of biodiesel as an alternative fuels in the diesel engine is very effective due to less of emissions and high performance. This study investigated the effect of palm oil blending and engine speed on performance and emission in diesel engine. The performance of biodiesel blends were investigated in terms of brake power, fuel consumption rate, flywheel torque, while emissions parameter was tested in terms of smoke opacity, hydrocarbon (HC), nitrogen oxide (NOx), carbon oxide (CO), carbon dioxide (CO2) and oxygen (O2) at various engine speed 1500, 2000, 2500 and 3000 revolution per minute (rpm). Biodiesel was blended with ordinary diesel fuel in various proportions. The engine was tested up to 50% load conditions by using Ordinary Diesel (OD), B5, B10 and B15 fuels. The properties of biodiesel fuel were tested including density, kinematic viscosity, water content and flash points test. Experimental results indicated that biodiesel blend shows the flywheel torque obtained is higher compared to the OD but fuel consumption rate and the brake power are quite similar when tested at ambient temperature. All biodiesel blends released good emissions compared to the OD. The CO2, CO, HC and O2 content released from the biodiesel fuels were clearly lower than the normal fuel except for NOX contents. Biodiesel released higher smoke opacity compared to OD at all range of engine speeds under 50% load condition. In conclusion, biodiesel fuels are found to offer better performances and emissions and are suitable to be used in unmodified diesel engine.

scholarly journals Simulation research into the influence of the combustion chamber blowby on the efficiency of a diesel engine

2014 ◽  
Vol 158 (3) ◽  
pp. 73-79
Author(s):  
Grzegorz KOSZAŁKA ◽  
Michał GĘCA ◽  
Andrzej SUCHECKI
Keyword(s):  
Diesel Engine ◽  
Combustion Chamber ◽  
Fuel Consumption ◽  
Engine Speed ◽  
Direct Injection ◽  
Engine Performance ◽  
Technical Condition ◽  
Maximum Torque ◽  
Simulation Research ◽  
Service Lead

Combustion chamber leakage, caused mainly by blowby, results in a reduced engine performance and higher fuel consumption. The blowby rate is, to some extent, determined by the design of the piston-ring-cylinder assembly (PRC) and the blowby rate varies throughout the life of an engine due to wear of the said assembly. The paper presents a quantitative evaluation of the influence of the combustion chamber blowby on the engine performance and fuel consumption on the example of two diesel engines: older generation naturally aspirated indirect injection diesel engine and a modern turbocharged direct injection engine. The assessment was made based on a simulation research using the AVL Boost software and the input data for the calculations were ascertained based on measurements performed on actual objects. The results have shown that a reduction of the blowby by half compared to the values occurring in engines of good technical condition would increase the maximum torque and power by approx. 0.5% for both investigated engines. The results of the simulation have also shown that increases in the blowby occurring in engines after long service lead to increased fuel consumption from 1% to 7% and the lower the engine speed and load the greater theses values.

scholarly journals Ensuring Requirements for Emissions of Harmful Substances of Diesel Engines

2020 ◽  
Vol 19 (4) ◽  
pp. 305-310
Author(s):  
G. M. Kuharonak ◽  
D. V. Kapskiy ◽  
V. I. Berezun
Keyword(s):  
Diesel Engine ◽  
Nitrogen Oxides ◽  
Fuel Consumption ◽  
Exhaust Gas Recirculation ◽  
Exhaust Gas ◽  
Average Temperature ◽  
Dispersed Particles ◽  
Harmful Substances ◽  
Gas Recirculation ◽  
Emissions Of Harmful Substances

The purpose of this work is to consider the requirements for emissions of harmful substances of diesel engines by selecting design and adjustment parameters that determine the organization of the workflow, and the exhaust gas cleaning system, taking into account the reduction of fuel consumption. Design elements and geometric characteristics of structures for a turbocharged diesel engine of Д-245 series produced by JSC HMC Minsk Motor Plant (4ЧН11/12.5) with a capacity of 90 kW equipped with an electronically controlled battery fuel injection have been developed: exhaust gas recirculation along the high pressure circuit, shape and dimensions of the combustion chamber, the number and angular arrangement of the nozzle openings in a nozzle atomizer, and inlet channels of the cylinder head. Methods for organizing a workflow are proposed that take into account the shape of the indicator diagrams and affect the emissions of nitrogen oxides and dispersed particles differently. Their implementation allows us to determine the boundary ranges of changes in the control parameters of the fuel supply and exhaust gas recirculation systems when determining the area of minimizing the specific effective fuel consumption and the range of studies for the environmental performance of a diesel engine. The paper presents results of the study on the ways to meet  the requirements for emissions of harmful substances, obtained by considering options for the organization of working processes, taking into account the reduction in specific effective fuel consumption, changes in the average temperature of the exhaust gases and diesel equipment. To evaluate these methods, the following indicators have been identified: changes in specific fuel consumption and average temperature of the toxicity cycle relative to the base cycle, the necessary degree of conversion of the purification system for dispersed particles and NOx. Recommendations are given on choosing a diesel engine to meet Stage 4 emission standards for nitrogen oxides and dispersed particles.

scholarly journals A model-based and experimental approach for the determination of suitable variable valve timings for cold start in partial load operation of a passenger car single-cylinder diesel engine

2018 ◽  
Vol 20 (1) ◽  
pp. 141-154 ◽  
Author(s):  
P Maniatis ◽  
U Wagner ◽  
T Koch
Keyword(s):  
Diesel Engine ◽  
Experimental Investigations ◽  
Exhaust Gas ◽  
Gas Temperature ◽  
Warm Up ◽  
One Dimensional ◽  
Engine Efficiency ◽  
Residual Gas ◽  
Dimensional Simulation ◽  
Exhaust Gas Temperature

A manipulation of the charge exchange allows controlling the amount of residual gas during engine warm-up. The residual gas during the warm-up phase leads to an increase of the exhaust gas temperature and supports to reach the exhaust after-treatment system operating temperature faster. In addition, the warm residual gas increases the combustion chamber temperature, which reduces the HC and CO emissions. However, fuel consumption increases. For that reason, such heating measures should be the best compromise of both, exhaust gas temperature increase and engine efficiency, in order to provide efficient heating strategies for passenger car diesel engines. Therefore, simulative and experimental investigations are carried out at the Institute of Internal Combustion Engines of the Karlsruhe Institute of Technology to establish a reliable cam design methodology. For the experimental investigations, a modern research single-cylinder diesel engine was set up on a test bench. In addition, a one-dimensional simulation model of the experimental setup was created in order to simulate characteristics of valve lift curves and to investigate their effects on the exhaust gas temperature and the exhaust gas enthalpy flow. These simulations were based on design of experiments (DoE), so that all characteristics can be used sustainably for modeling and explaining their influences on the engine operation. This methodology allows numerically investigating promising configurations and deriving cam contours which are manufactured for testing. To assess the potential of these individual configurations, the results obtained were compared with each other as well as with the series configuration. Results show that the combination of DoE and one-dimensional simulation for the design of camshaft contours is well suited which was also validated with experimental results. Furthermore, the potential of residual gas retention by favorable configurations with a second event already revealed in various publications could be confirmed with respect to exhaust gas temperature increase and engine efficiency.

Optimization of Engine Efficiency for Diesel Engine Equipped With EGR-VGT and Aftertreatment Systems

2019 ◽  
Author(s):  
Kuo Yang ◽  
Pingen Chen
Keyword(s):  
Diesel Engine ◽  
Fuel Consumption ◽  
Diesel Engines ◽  
Intrinsic Property ◽  
Nox Emission ◽  
Nox Emissions ◽  
Minimum Phase ◽  
Engine Efficiency ◽  
Simulation Results ◽  
Aftertreatment Systems

Abstract Engine efficiency improvement is very critical for medium to heavy-duty vehicles to reduce Diesel fuel consumption and enhance U.S. energy security. The tradeoff between engine efficiency and NOx emissions is an intrinsic property that prevents modern Diesel engines, which are generally equipped with exhaust gas recirculation (EGR) and variable geometry turbocharger (VGT), from achieving the optimal engine efficiency while meeting the stringent NOx emission standards. The addition of urea-based selective catalytic reduction (SCR) systems to modern Diesel engine aftertreatment systems alleviate the burden of NOx emission control on Diesel engines, which in return creates extra freedom for optimizing Diesel engine efficiency. This paper proposes two model-based approaches to locate the optimal operating point of EGR and VGT in the air-path loop to maximize the indicated efficiency of turbocharged diesel engine. Simulation results demonstrated that the engine brake specific fuel consumption (BSFC) can be reduced by up to 1.6% through optimization of EGR and VGT, compared to a baseline EGR-VGT control which considers both NOx emissions and engine efficiency on engine side. The overall equivalent BSFCs are 1.8% higher with optimized EGR and VGT control than with the baseline control. In addition, the influence of reducing EGR valve opening on the non-minimum phase behavior of the air path loop is also analyzed. Simulation results showed slightly stronger non-minimum phase behaviors when EGR is fully closed.

The Influence of Butanol Use on the Diesel Engine’s Performance

2016 ◽  
Vol 822 ◽  
pp. 183-189
Author(s):  
Alexandru Dobre ◽  
Constantin Pană ◽  
Nikolaos Cristian Nuțu ◽  
Niculae Negurescu ◽  
Alexandru Cernat
Keyword(s):  
Diesel Engine ◽  
Numerical Modelling ◽  
Diesel Fuel ◽  
Engine Speed ◽  
Butyl Alcohol ◽  
Compression Ignition ◽  
Primary Alcohols ◽  
Maximum Torque ◽  
Fuel Blends ◽  
Compression Ignition Engines

Alcohols begin to show a real interest for their use as fuel at compression ignition engines due to require reducing the pollutants emissions, especially NOx emission. Among the primary alcohols, butyl alcohol (butanol) is considered to be of great perspective in its use as fuel in diesel engines due to its properties close to those of diesel fuel. It is miscible with the diesel fuel and the achieved blend is stable. In paper are presented some aspects regarding the diesel engine’s fuelling with butanol and diesel fuel blends using the experimental research and numerical modelling. The use of the butanol as a fuel for diesel engine has led to the reducing NOx emissions with about 25% and the Brake Specific Energetic Consumption (BSEC) with about 5% at the full load and the maximum torque engine speed.

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.

Sign in / Sign up

Export Citation Format

Share Document