Uncoated Engine Research Articles

Combined influence of thermal barrier coating and nanoparticle on performance and emissions of DI diesel engine fueled with neat palm oil biodiesel: An experimental, statistical and energy and exergy analysis

In the present work, neat palm biodiesel (BD 100) was utilized in the compression ignition (CI) engine under the influence of thermal barrier coating and cerium oxide (CeO2) nanoparticles.The optimal factor conditions were determined through statistical analysis using the Response Surface Methodology (RSM), with appropriate input parameters provided. The results show that using a thermal barrier coated (TBC) engine with a 200 micron (0.2 mm) thickness of cylinder liner and 45 ppm cerium oxide nanoparticles combined with 100% palm biodiesel significantly improves performance and reduces emissions.The energy and exergy methodology tool was then used to analyze the various fuel conditions in order to examine the variations in energy flow.The assessment criteria that were experimentally confirmed were an average reduction in specific fuel consumption (SFC) of 0.065 kg/kWh and an increase in brake thermal efficiency (BTE) of 4.07%. The reduction of exhaust gases was seen to be significant when compared to those obtained from an uncoated engine running on diesel fuel, as indicated by the carbon monoxide (CO) level of 0.0916% by volume, the unburned hydrocarbon (UBHC) level of 38.2 parts per million (ppm), NOx of 132 ppm and the smoke opacity level of 10.52%.

Study on exhaust gas recirculation diesel engine using karanja oil methyl ester with low heat rejection in direct injection

Energy is a fundamental necessity for man›s life in the digital world today. The rapid depletion of fossil fuel resources forces rigorous alternative fuel analysis. Petroleum diesel can better replace vegetable oils, edible or motored today. The rapid depletion of fossil fuel resources forces rigorous alternative fuel analysis. Petroleum diesel can better replace vegetable oils, edible or not. Karanja may be a possible supplier of diesel fuel for non-edible oil substitution. Current combustion surfaces for pistons, valves, and cylinders have been filled with ceramic materials, which make the engine totally adiabatic (LHR). The performance of a biodiesel-powered compressing ignition (CI) engine may be further boosted by utilising the engine›s heat effectively and increasing thermal efficiency. Exhaust Gas Recirculation (EGR) is actually one of the most important methods of limiting NOx emissions in internal combustion engines. Explore the output with and without exhaust gas recirculation on a retarded timing engine with diesel and karanja oil methyl ester (KOME). The LHR with a retarded timing engine yielded improved thermal brake efficiency (TBE), decreased HC, smoke, and CO emissions, while increasing KOME›s NOx in comparison with an uncoated engine. As the EGR rate grew, NOx and BTE were reduced marginally with increased HC, CO, and smoke. 24.1 g/kw-hour CO, 10.1 g/kw-hour NOx, and 0.55 g/kW-hour HC were registered at 20 percent of EGR.

Effects of Thermal Barrier Coated Piston on Performance and Combustion Characteristics in Dual-Fuel Common-Rail Diesel Engine

In this study, performance and combustion characteristics of biogas and biogas+hydrogen mixtures were experimentally analysed and compared with baseline diesel fuel in a common-rail diesel engine with and without thermal barrier coated piston. Tests were conducted at three different loads (50 Nm, 75 Nm, and 100 Nm) and a constant speed of 1750 min-1. Engine pistons were coated with Yttria Stabilized Zirconia by atmospheric plasma spray method. Results showed that by replacing the standard pistons with the coated pistons, an increase for diesel, biogas, and hydrogen enriched biogas was respectively defined by 8.1%, 6%, and 23% in cylinder pressure, and 19.8%, 12.6%, and 25% in HRR at medium load. Similarly, there was an increase in range of 1.05-12.8% in gas temperature and 20.5-117.2% in knock intensity by the piston coating. CA10-90 was prolonged between 1-15 oCA with gaseous fuel modes and increased with the engine load. Volumetric efficiency was reduced by 0.1-4% with the gaseous fuel operations, while it was increased by using the coated piston for all fuels. Exhaust gas temperature increased with the gaseous fuels whereas showed discrepancies with the coated piston engine. Dual-fuel mode and coated pis-ton application caused brake specific energy consumption to increase significantly.

Thermal and experimental analyses of thermal barrier coated pistons

ABSTRACT The thermal analysis of pistons with two different thermal barrier coatings (TBC) is carried out in this research work. TBC comprising Yttria stabilized zirconia (YSZ), and YSZ + Cerium oxide (CeO2) is applied to an aluminum alloy piston. The coating consists of two layers; the first is the bond coat, and the second is the top coat. Three different thicknesses of the top coat are chosen, viz., 0.3 mm, 0.6 mm, and 0.9 mm. SOLIDWORKS is used to draw the piston and different thicknesses of the layers (top coatings). ANSYS software is used for performing structural and steady-state thermal analyses on the piston surface. After the analysis, experiments are conducted on a single-cylinder, air-cooled, direct injection (DI) diesel engine fitted with TBC pistons. The performance of the engine fitted with both coated pistons is evaluated and compared with that of the uncoated piston engine operation. The brake thermal efficiency (BTE) for the JME20 fuel blend is increased by about 2.8%, and 6.5% for engines fitted with YSZ and YSZ+CeO2 coated pistons, respectively, at full load. The engine’s brake specific fuel consumption (BSFC) is improved by 2.5%, and 5.3% for the YSZ and YSZ+CeO2 coated piston fitted engines, respectively, for JME20.

Effects of Thermal Barrier Coating Using Various Dosing Levels of Aluminium Oxide Nanoadditive Fuel on Diesel in Compressed Ignition Engine

Environmental effects of vehicle exhausts from internal combustions engines which accounts for about 90% of vehicles on the roads is posing a major threat to environmental safety, and it only continues to surge at an alarming rate now than ever. With diesel engines being the most cost‐effective prime mover readily available, their contribution to environmental pollution problems is humongous. The harmful contaminants from diesel exhausts are particulate matter (PM) and hydrocarbon and nitrogen oxides (NOx). So, efforts to curb environmental pollution are the need of the hour by making necessary improvements to reduce their local and global environmental impact. In this study, examine the effects of yttria‐ and alumina‐stabilised zirconia coating on the piston head and cylinder lining of a single‐cylinder diesel engine, as well as its performance and emissions. Various dosing amounts of nanoparticles of aluminium oxide were utilised as additives to diesel fuel in this study, on both coated and uncoated internal combustion engines. Many coated engine metrics improved significantly as a result of the research. The brake thermal efficiency has increased by 2.1 percent as compared to a conventional uncoated diesel engine, while brake‐specific consumption has dropped by 3%, resulting in a reduction in dangerous chemicals.

An efficient approach for emission reduction in diesel engine with ferric chloride as catalyst and yttria stabilized zirconia as thermal barrier coating

Emission relates to the release of the products of combustion to the ambience from within a combustion unit usually in the gaseous form, these being hazardous to the human lives in general. In the present examination, combustion and outflow attributes of yttria stabilized zirconia was observed in a diesel engine by consolidated impact of ferric chloride and steam injection as fuel added substance were contemplated. In this experiment ferric chloride has been elected as catalyst. The mixing of catalyst with the inlet air generate higher bonding of iron-oxo as a result it enhance the process of combustion which ultimately shows better hydrocarbon oxidation. As ferric chloride can be easily mixed with diesel, so we added 0.2 g L-1 of catalyst in our experiment. The outcome shows that when we add 0.2 g L-1 Ferric chloride with diesel in yttria stabilized zirconia covered motor together with steam injection, it diminished the emissions. The percentage of emissions diminished was given by 31%, 33%, 42% and 59% for nitrogen oxide, carbon monoxide, hydrocarbons and smoke opacity respectively when compared with a typical uncoated diesel engine.

Analysis of thermal barrier coated pistons in the COMSOL and the effects of their use with water + ethanol doped biodiesel

In this study, the thermal analysis of an aluminum piston coated with MgOZrO2 to create a thermal barrier with the COMSOL multiphysics program and the changes in exhaust gas temperature, fuel consumption, and engine torque values obtained as a result of engine test experiments were examined. For this purpose, the MgOZrO2 coated and uncoated piston engine was started with biodiesel and 5% water + 15% ethanol doped biodiesel fuel at engine speeds of 1000 rpm, 1500 rpm, 2000 rpm, and 2500 rpm. In the thermal analysis results obtained in the COMSOL, it was found that the temperature values increased in the upper regions of the coated pistons. Likewise, in engine experiments, increased exhaust gas temperature and engine torque showed a tendency to decrease fuel consumption values. It has been observed that the data obtained in the analysis in the COMSOL program are in parallel with the results of the engine experiments.

Effects of fusel oil use in a thermal coated engine

Coated engines are now known to cause improvements in performance and emissions. But an excessive increase in nitrous oxide (NOx) emissions is described as a negative aspect of coated engines. For this purpose, many coating materials are applied to Pistons and valves. One of these coating materials is Al2O3 + 13%TiO2 ceramic powders. In this study, Al2O3 + 13%TiO2 ceramic powders were coated on piston and Valve surfaces by plasma spray method. Fusel oil containing 9.6% water by volume was mixed with 25% of diesel fuel in the coated engine and tested at different engine speeds (1400 rpm, 1700 rpm, 2000 rpm, 2300 rpm, 2600 rpm, 2900 rpm, and 3200 rpm). In all fuel mixtures, engine in-cylinder pressure changes, heat release rate (HRR), fuel consumption value, exhaust gas temperature value and emission values (NOx, smoke opacity and carbon monoxide (CO), hydrocarbon (HC)) were examined. Along with the addition of fusel oil to diesel fuel, the pressure in the cylinder and exhaust gas temperature in the uncoated engine decreased, while the pressure in the cylinder increased in the coated engine. In addition, fuel consumption in the coated engine, NOx, CO, smoke opacity and HC emissions tended to decrease. The use of coating with the addition of fusel oil has been found to be more effective in reducing NOx, CO, smoke opacity and HC emissions.

Ceramic Material for Thermal Barrier Coatings in Compression Ignition Engine for its Performance Evaluation with Biodiesel

In the present investigation, a Dongfeng compression ignition (CI) engine powered by biodiesel and diesel fuel, and analysed to gauge performance when coupled with a Thermal Barrier Coating (TBC) coated combustion chamber. TBC in CI engine improves its thermal retention and enhances biodiesel usability, which has a higher flashpoint than diesel. Biodiesel extracted from non-edible Pongamia Pinnata seeds is blended with diesel in various ratios to prepare 20BD (20%Pongamia Biodiesel + 80%diesel), 50BD and 100BD blends for the experiment. The properties of these fuel blends were tested by following American Standard for Testing and Materials (ASTM) approved testing methods to check their suitability as fuel for the CI engine. The piston crown, cylinder liner, inlet, and exhaust valves surface coated with TBC. The TBC is composed of a bond coat applied on the substrate which needs to be thermally insulated and a topcoat of ceramic material over bond coat. The bond coat of NiCrAl (Nickel-Chromium-Aluminium) of thickness 1 mm and a 4 mm topcoat of Titanium dioxide (TiO2) coated using the plasma spray coating method. A comparative study between a coated and uncoated engine component with diesel and biodiesel blends to study performance effects. The results show that the CI engine with 20BD, consumed 10.6% lower fuel when used in a coated engine than in an uncoated engine. Brake thermal and mechanical efficiency with 20BD were increased by 4.7%, and 2.6% respectively in TBC sprayed CI engine at part load. The lower the heat loss to coolant from the engine, the lower the consumption of fuel. An increase in heat retention in the coated combustion chamber leads to a boost in fuel vaporisation and a shortening of physical ignition delay. Hence, the CI engine's modification to accommodate biodiesel with TBC has a net positive impact on fuel consumption and engine efficiency.

Comparative investigation of fly ash-coated semi-adiabatic diesel engine on performance and emission characteristics by using cotton seed biodiesel and emulsified cotton seed biodiesel

ABSTRACT The diminution of petroleum fuel along with its serious side effect on the environment accelerated an effort to find an option for petroleum. Biodiesel with different blend combinations and emulsified biodiesel have a promising option as an alternative fuel. Work of this manuscript has two phases. Phase one deals with cotton seed biodiesel with different blend combinations such as 10, 20 and 30% by volume as operating fuel. Phase two deals with emulsified cotton seed biodiesel with 5, 10 and 15% of water by volume. To investigate these two phases, fuel, coated/semi adiabatic and uncoated engine operating conditions used. Single-cylinder diesel engine is considered for a coating process. To satisfy the coated engine operating condition fly ash powder is used as a thermal barrier coating (TBC) material with 200 µm thickness. Brake thermal efficiency increment was observed in coated engine for biodiesel fuel and biodiesel with 10% water case. Reduction in emission was observed in the coated engine except NOx emission for both biodiesel and emulsified biodiesel. It is noticed that from phase one cotton seed biodiesel blend (B20) and phase two B20 with 10% water emulsified fuel has a suitable option for diesel fuel on major aspects.

Impact of yttria stabilized zirconia coating on diesel engine performance and emission characteristics fuelled by lemon grass oil biofuel

The aim of present work is to improve the efficiency and reduce the harmful exhaust emissions from diesel engines. Neat lemongrass oil was selected as a biofuel, and its physical and chemical properties based on ASTM standards were investigated. The combustion unit was coated with yttria-stabilized zirconia as a ceramic layering material. The initiative behind the thermal barrier coating was to acquire reduced heat losses by ceramic layering the combustion unit with the substance having reduced thermal conductivity, so as to aid in the transformation of accrued heat transformation into constructive work. Conventional diesel fuel was taken as a baseline fuel and investigated in the uncoated engine. Then, the coated combustion unit was installed in the engine and investigated with diesel. Subsequently, lemongrass biofuel was used as operating energy in both coated and normal conditions. Ceramic-layered conditions exhibited high engine efficiency with reduced fuel utilization. The result showed that the coated engine exhibited reduced emissions like smoke, HC and CO with the exception of NOx compared to normal engine. This variation was observed owing to trapping of energy inside the combustion unit and low level of energy transferred to the combustion chamber walls.

Analysis on impact of thermal barrier coating on piston head in CI engine using biodiesel

The fossil fuel energy sources over the world are depleting day by day. In this situation, there is a necessity to explore for substitute fuels. Low volatility, filter clogging and high viscosity are main drawbacks of vegetable oils. Due to above said problems, poor combustion and poor performance take place. For the enhancement of above properties, thermal barrier coated engine is adopted. In the present work, an effort is made to use Yttria stabilised zirconia (YSZ) coating applied on a Toroidal geometry piston crown using plasma spray technique. Three thermal barrier coating thicknesses 150, 300 and 450 microns are considered in this study. Experiments are conducted on uncoated piston engine with diesel and coated piston engine fuelled with diesel, Jute methyl ester and Neem methyl ester separately. Increase in thermal efficiency and reduction in emissions were recorded with coated piston engine. Among the fuels used, the best results were obtained by Jute methyl ester with Low Heat Rejection (LHR) engine coated with 300 microns.

Analysis of performance, emission, combustion and endoscopic visualization of micro-arc oxidation piston coated SI engine fuelled with low carbon biofuel blends

The low carbon biofuel (pine oil) derived from the pine tree is endowed with enhanced fuel properties with good octane rating and can be used for SI engine applications. In order to operate pine oil blends with improved fuel efficiency, engine design modification is required. This work investigates the change reflected on the engine characteristics of the port fuelled SI engine due to a thin thermal barrier coating layer formed on the piston crown using the Micro-arc oxidation technique. Furthermore, an endoscopic visualization technique was adopted to compare the combustion flames of uncoated and coated piston engines fuelled with pine oil blends. The coated piston engine fuelled by pine oil blends displayed improved peak in-cylinder pressure and heat release rate. Among the pine oil blends, P20 (20% pine oil + 80% gasoline) blend showed superior engine characteristics at all engine load conditions. The brake thermal efficiency of the coated piston engine fuelled with the P20 blend was improved by 1.8% compared to the uncoated piston fuelled with gasoline. With the P20 blend, the CO, HC emissions were decreased by 8% and 14% respectively and NO emission was increased by 19% for coated piston when compared to gasoline with an uncoated piston engine.

Investigation of the effect of rare earth doped La2Zr2O7 based thermal barrier coating on performance and combustion characteristics of DI diesel engine

In this study, surfaces of combustion chamber parts (cylinder head and piston) were coated with the new generation TBC (thermal barrier coating). Lanthanum Zirconate (La2Zr2O7) based ceramic top layers which have rare element additions such as Yb, Dy and Nd (in the compound of La1.4(Yb, Nd, Dy)0.6Zr2O7) had been successfully produced via APS (Atmospheric plasma spray) method in a double layered design using CYSZ (ceria–yttria stabilized zirconia) as the second material (ceramic interlayer). A single cylinder diesel engine was used at different speeds (1200, 1400, 1600, 1800 and 2000 rpm) and full load for tests. The results of the reference engine were experimentally compared to the results of four different La2Zr2O7 based coatings. The effects of coatings such as torque, specific fuel consumption, exhaust temperature, cylinder pressure, heat release rate, mass fraction burned and pressure increase rates were investigated on the engine. According to the test results, in-cylinder pressure, heat release rate, pressure increase rate, torque and exhaust temperatures increased owing to La2Zr2O7 based coatings. Maximum cylinder pressure, heat release rate and torque values were reached with Yb doped La2Zr2O7 coatings. Combustion occurred later and longer in the whole coated engines. Break specific fuel consumption was achieved %1.26 to 2.6% lower than the reference (uncoated) engine.

Enhancing Diesel Engine Performance and Balancing Emissions with Effect and Contribution of MgO-ZrO2 and AT13 Layered Piston

Modern engines need to produce more efficiency in all aspects with low specific fuel consumption and lesser pollutions for environmental betterment. The purpose of this research work is to experimentally identify better thermal barrier coating and their impacts to enhance engine performance with lower specific fuel consumption. Piston crown of a single-cylinder diesel engine is coated with MgO-ZrO2 and Al2O3-13%TiO2 and tested under different loading conditions. The impact of thermal barrier coating performance and emissions compared with standard diesel engine characteristics is investigated. MgO-ZrO2 and Al2O3-13% TiO2 are selected as additional material to coat the piston crown because these materials are physically stable and thermal properties like low heat conductivity, high melting point and high thermal expansion are stable at high temperature. This experimental work has shown an increase in brake thermal efficiency of 32.1% for the TBC engine from 23.4% for the UC engine. Therefore, there is a decrease in brake-specific fuel consumption for TBC engine 0.27 kg/kWh from uncoated engine 0.37 kg/kWh at 9 kg of load decreased by 27.03%. It was observed from the heat balance sheet that the TBC engine useful work was increased by 3.5% compared with the uncoated engine which ultimately decreases the effect of gases like CO and HC due to an increase in the complete combustion by the thermal barrier coating.

Comprehensive study of engine characteristics of novel biodiesel from curry leaf (Murraya koenigii) oil in ceramic layered diesel engine

In this study, renewable alternative fuel was produced from curry leaf (Murraya koenigii) oil using transesterification technique in the presence of catalyst along with alcohol. The important properties of produced biodiesel were explored in accordance with ASTM and further chemical compositions were explored by means of FTIR and GC–MS analyses. Four different fuel blends like B25, B50, B75 and B100 were developed. To enhance the study, combustion chamber components were transferred into low heat rejection unit by employing thermal barrier coating with Yttria stabilized zirconia. TBC was achieved by means of atmospheric plasma spray coating technique. The engine used for present work was a fully computerized diesel engine with direct injection technique. In coated engine, B25 showed 0.49% of increased thermal efficiency with 0.015 kg/kWh of decreased fuel consumption. Lower tail pipe emissions like carbon monoxide, hydrocarbon and smoke (except NOx) were noticed in ceramic layered engine than uncoated engine. B25 showed improved engine combustion characteristics like combustion chamber pressure, heat release rate and mean gas temperature in ceramic layered condition owing to short ignition delay, elevated combustion temperature, improved turbulence and oxygen presence in the fuel. On the whole, B25 blend experienced more favouring engine characteristics coated engine and B25 with engine modification technique may be recommended as a promising renewable alternative fuel for conventional diesel with minimum blending condition.

Performance of a low heat rejection engine fuelled with tobacco seed oil and its methyl ester (TSOME)

In this investigation, the engine components were coated with metal matrix composite materials. Thus, a compression ignition (CI) was converted into low heat rejection (LHR) engine. Initially diesel fuel (DF), tobacco seed oil (TSO) and tobacco seed oil methyl ester (TSOME) were tested on an uncoated engine in order to make the basis for comparison. The results obtained show reduced brake thermal efficiency, increased brake specific energy consumption and an increase in emissions for TSO when compared with DF operation. However, with TSOME marginal improvement in BTE, BSEC and slight reduction in emissions were observed when compared with TSO. Then TSO and TSOME were tested in the coated engine. Results obtained were compared with results of DF, TSO and TSOME in non LHR engine operation. These results showed that the LHR operation improved the performance of the engine with the reduction in emissions for the fuels used when compared with non LHR operation. Abbreviations: BP: Brake power; BTE: Brake thermal efficiency; BSFC: Brake specific fuel consumption; BSEC: Brake specific energy Consumption; CO: Carbon monoxide emission; EGT: Exhaust gas temperature; HC: Hydrocarbon; NOx: Oxides of nitrogen; NHRR: Net Heat release rate; RPR: Rate of pressure rise; DF: Diesel fuel; TSO: Tobacco seed oil; TSOME: Tobacco seed methyl ester; LHR: Low heat rejection engine; MMC: Metal matrix composite; CA: Crank angle; CI Compression ignition

Addition of diethyl ether on the LHR engine characteristics using biodiesel-eucalyptus blend

ABSTRACT The present experiment deals with the study of addition of diethyl ether on the performance and emission characteristics of LHR engine using papaya methyl ester-eucalyptus oil blends. The test blends are CPME30Eu70 (Carica papaya methyl ester 30% and Eucalyptus oil 70%), CPME30Eu70 + 10% DEE and diesel. The optimum results we get with presence of DEE in CPME30Eu70 in LHR engine. The presence of DEE creates a lean mixture, low viscosity, high cetane number and volatility improves performance for a large degree. The graph depicts that addition of 10% diethyl ether gives the best performance in BSEC, BSFC, BTE and emission wise when coupled with LHR engine. At higher load, BTE for CPME30Eu70 added with 10% in coated engine is 33% and it was 3% higher compared to CPME30Eu70 in uncoated engine. Most notably NOx emission rate is decreased by the presence of the DEE and BSFC is brought under acceptable limit. NOx emission rate while using diethyl ether decreased the emission by 90 ppm when compared to blend without diethyl ether. BSEC decreases in CPME30Eu70 + 10%DEE and betters the performance of diesel in conventional engine. It also said to improve the cold flow properties of the CPME-eucalyptus oil blend.

ANALYSIS OF CI ENGINE PERFORMANCE BY THERMAL BARRIER COATINGS ON PISTON UNDER DIFFERENT COOLING RATES

To analyze performance of a twin cylinder four stroke CI engine whose piston is coated with a ceramic material and experiments are carried out at different cooling rates. Research & Development technique is used for decreasing costs and consumption of fuel in internal combustion engines and technological innovation studies are going on continuously. Through various constructional changes engine efficiency development efforts are augmented day by day; for instance, parallel to development of advanced technology ceramics, ceramic coating applications in IC engines grows fast. In order to get better engine performance, fuel energy must be converted to machine energy at the most possible rate. Lower heat rejection from combustion chamber through thermally insulated components leads to increase in available energy that will raise the cylinder work and total energy carried by the engine exhaust, which could be also utilized. The research engine was a four-stroke, direct injection, twin cylinder, water cooled CI engine. It was tested at constant speed and different load conditions before coating. Also Piston was coated with 0.5mm size of Zirconia (ZrO2) over a 150 μm thickness of NiCrAlY bond coat. The engine was tested at standard conditions to study the effect of coated surfaces of piston on its performance and emissions of the engine. The ceramic-coated engine performance is to be compared with conventional uncoated engine performance. Engine exhaust such as NOx CO, CO2 and Unburned Hydro Carbons are to be determined with the aid of exhaust gas analyzer by conducting several experimental cycles at various loads i.e., at 0.5,1,1.5,2,2.5& 3 K.W load after piston is coated by ceramic material.

Optimization of Performance and Emission Characteristics of Catalytic Coated IC Engine with Biodiesel Using Grey-Taguchi Method

The performance and emission affected by piston catalytic coating have been analyzed in this study. The main contributing factors for improving performance such as load, fuel and speed have been preferred to reduce the emission and improve the performance of an IC engine. These specific standard parameters have been modified with copper alloy coated diesel engine with the aid of design of experiment by Taguchi with grey relational analysis optimization (GRA) method, for improving the IC engine performance and reducing the emissions. The result shows modified copper chromium zirconium (CuCr1Zr) catalytic coated piston produces less emission and improves performance when compared to standard un-coated piston type engine. In this investigation cotton seed oil is used as a bio- diesel and the piston and combustion chamber were coated with copper chromium zirconium material with a thickness of 250 microns. Finally the results of the experiments were compared with un-coated engine and optimized parameters have been identified for catalytic coated modified IC engine using Taguchi with GRA approach.