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A Technical Review on Performance and Emissions of Compressed Natural Gas – Diesel Dual Fuel Engine

Indian Oil Corp Ltd-M. Muralidharan, M Subramanian
University of Petroleum and Energy Studi-Ajay Srivastava
  • Technical Paper
  • 2019-28-2390
To be published on 2019-11-21 by SAE International in United States
In view of the depletion of energy and environmental pollution, dual fuel technology has caught the attention of researchers as a viable technology keeping in mind the increased availability of fuels like Compressed Natural Gas (CNG). It is an ecologically friendly technology due to lower PM and smoke emissions and retains the efficiency of diesel combustion. Generally, dual fuel technology has been prevalent for large engines like marine, locomotive and stationary engines. However, its use for automotive engines has been limited in the past due to constraints of the limited supply of alternative fuels. CNG is a practical fuel under dual-fuel mode operation, with varying degree of success. The induction method prevents a premixed natural gas-air mixture, minimizes the volumetric efficiency and results in a loss of power at higher speeds. Under lower engine operating temperatures, at low-intermediate loads, the NOx emissions reduces however HC and CO emissions are significantly increased. This paper reviews the performance and emissions of compressed natural gas (CNG) – diesel dual fuel engine.

Noise and vibration simulations method for electric hybrid tractor powertrain.

Tafe Motors and Tractors Limited-Ishwinder Pal Singh Sethi, Anand Shivajirao Patil
  • Technical Paper
  • 2019-28-2469
To be published on 2019-11-21 by SAE International in United States
Internal combustion (IC) engines have been serving as prime source of power in tractors, since late 19th Century. Over this period, there have been significant improvements in IC engine technology leading to increased power density, reduction in tailpipe emissions and refinement in powertrain noise of tractors. As the regulations governing tailpipe emissions continue to be more stringent, original equipment manufacturers also have initiated work on innovative approaches such as diesel-electric hybrid powertrains to ensure compliance with new norms. However, introduction of such technologies may impact customer’s auditory, vibratory and drivability perceptions. Absence of conventional IC engine noise, association of electric whistle and whine, torque changes with activation/de-activation of motors and transmission behavior under transient conditions may result in new NVH issues in hybrid electric vehicles. The following paper addresses these concerns and introduces a multi-physics simulation model to investigate and mitigate these effects. The multi physics simulation model presented in this paper incorporates the multi-disciplinary domain of internal combustion engine thermodynamics, electric components, mechanical systems, control systems and the vehicle response.

Computerized Experimental Investigation on Performance & Exhaust Emission of Twin Cylinder Adiabatic Diesel Engine coated with YSZ

SVMIT Bharuch-Dr. Dipakkumar C. Gosai
SVNIT Surat-Anil Kumar Gillawat
  • Technical Paper
  • 2019-28-2548
To be published on 2019-11-21 by SAE International in United States
The fuel consumption and performance of the Internal Combustion engine is improved by adopting concepts of an adiabatic engine. An experimental investigation for different load conditions is carried out on a water-cooled, constant-speed, twin-cylinder diesel engine. This research is intended to emphasize energy balance and emission characteristic for standard uncoated base engine and adiabatic engine. The inner walls of diesel engine combustion chamber are thermally insulated by a top coat of Metco 204NS yttria-stabilized zirconia (Y2O3ZrO2) powder (YSZ) of a thickness of 350 mm using plasma spray coating technology. The same combustion chamber is also coated with TBC bond coats of AMDRY 962 Nickle chromium aluminum yttria of thickness of 150 mm. The NiCrAlY powder specially designed to produce coating’s resistance to hot corrosion. The combination of this ceramic material produces excellent high-temperature thermal barrier coating (TBC) resistant to thermal cycling stresses and strains. The engine valves, engine heads, and engine pistons were thermal barrier ceramic coated and computerized experimental results were compared to the base engine. Experimental results justified TBC engine to give a…

Combustion Optimization and In-cylinder NOx and PM Reduction by using EGR and Split Injection Technique

A R A I-Madhan Kumar, Aatmesh Jain, Kamalkishore Chhaganlal Vora
  • Technical Paper
  • 2019-28-2560
To be published on 2019-11-21 by SAE International in United States
Nowadays, the major most challenge in the diesel engine is the oxides of nitrogen (NOx) and particulate matter (PM) trade-off, with minimal reduction in Power and BSFC. Modern day engines also rely on expensive after-treatment devices, which may decrease the performance and increase the BSFC. In this paper, combustion optimization and in-cylinder emission control by introducing the Split injection technique along with EGR is carried out by 1-D (GT-POWER) simulation. Experiments were conducted on a 3.5 kW Single-cylinder naturally aspirated CRDI engine at the different load conditions. The Simulation model incorporates detailed pressure (Burn rate) analysis for different cases and various aspects of ignition delay, premixed and mixing controlled combustion rate, the injection rate affecting oxides of nitrogen and particulate matter. The predictive combustion model (DI-PULSE) has been developed for the calibration of an engine under multiple injections and the detailed injection rates with EGR rates. Split injection with higher fuel quantity injected in the 1st pulse, helped to significantly reduce PM emissions. This reduction is due to the restraint in the premixed phase of…

Optimization of Compression Ratio for DI Diesel Engines for better fuel Economy

Tata Technologies Ltd-Aashish Bhargava, Gaurav Soni
Tata Technologies, Ltd.-Sujit Gavade
  • Technical Paper
  • 2019-28-2431
To be published on 2019-11-21 by SAE International in United States
Fuel economy is becoming one of the key parameter as it not only accounts for the profitability of commercial vehicle owner but also has impact on environment. Fuel economy gets affected from several parameters of engine such as Peak firing pressure, reduction in parasitic losses, improved volumetric efficiency, improved thermal efficiency etc. Compression ratio is one of key design criteria which affects most of the above mentioned parameters, which not only improve fuel efficiency but also results in improvement of emission levels. This paper evaluates the optimization of Compression ratio and study its effect on Engine performance. The parameters investigated in this paper include; combustion bowl volume in Piston and Cylinder head gasket thickness as these are major contributing factors affecting clearance volume and in turn the compression ratio of engine. Based on the calculation results, an optimum Compression Ratio for the engine is selected. Further Engine testing carried out with selected Compression ratios and parameters such as Fuel efficiency, In cylinder pressure, Brake thermal efficiency and Ignition delay were compared.

Potential for Emission Reduction and Fuel Economy with Micro & Mild HEV

AVL LIST GmbH-Franz Murr, Ernst Winklhofer
  • Technical Paper
  • 2019-28-2504
To be published on 2019-11-21 by SAE International in United States
The development of modern combustion engines (spark ignition as well as compression ignition) for vehicles compliant with future oriented emission legislation (BS6, Euro VI, China 6) has introduced several technologies for improvement of both fuel efficiency as well as low emissions combustion strategies. Some of these technologies as there are high pressure multiple injection systems or sophisticated exhaust gas aftertreatment system imply substantial increase in test and calibration time as well as equipment cost. With the introduction of 48V systems for hybridization a cost-efficient enhancement and, partially, an even attractive alternative is now available. An overview will be given on current technologies as well as on implemented or simulated vehicle concepts for light duty gasoline and diesel powertrains. The focus will be on solutions which have potential for the Indian market, i.e. solutions which can be implemented with moderate application effort for currently available compact and medium size cars. The possibilities of 12/24 & 48V technologies for fuel economy and emission reduction will be discussed. Simultaneously, tools for testing and calibration at power train testbed…

Design and Development of Constant speed diesel engine up to 20 bar BMEP with Inline FIS

Tafe Motors and Tractors Limited-Omprakash Yadav, Piyush Ranjan, Vishal kumar, Vasundhara Arde, Sanjay Aurora, Remesan Chirakkal
  • Technical Paper
  • 2019-28-2549
To be published on 2019-11-21 by SAE International in United States
Design and Development of Constant speed diesel engine up to 20 bar BMEP with Inline FIS Remesan CB, Sanjay Aurora, Vasundhara V Arde, Vishal Kumar, Om Prakash Yadav, Piyush Ranjan Eicher Engines (A unit of TAFE Motors & Tractors Ltd.) Abstract Development trend in diesel engine is to achieve more power from same size of engine. With increase in brake mean effective pressure (BMEP), the peak firing pressure will also increase. The methodology to control the peak firing pressure on higher BMEP is the major challenge. We achieved better SFC with CPCB II emission targets on a constant speed engine. This study involves a systematic approach to optimize combustion parameters with a cost effective and robust inline Fuel Injection System. This paper deals with the strategies applied and experimental results for achieving the power density of 25kW/lit with Inline FIP by keeping lower Peak firing pressure. Various combustion parameters such as Combustion Bowl Geometry, selection of Turbocharger, Swirl, FIP, Nozzle configuration, EGR flow rate, EGR operation strategy, optimizing injection pressures, start of injection, end of…

Powertrain topologies for 2 wheelers : From ICE to Electrification

Robert Bosch Engrg & Bus Solutions , Ltd.-Sathyanarayana Rao
  • Technical Paper
  • 2019-28-2480
To be published on 2019-11-21 by SAE International in United States
As Battery cost is expected to see a Downward trend, Electrification of Powertrain in general is expected to pick up and 2wheeler Market is foreseen to be the Flag bearer in this race towards Electrification. In this paper, we would like to emphasize on the Journey of 2wheelers from Conventional Internal combustion Engine to Electrified Powertrains which we foresee in the future. Methodology: EV - Analysis of OEM strategies and upcoming trends in connectivity and electrification. Estimation of current market size of 2Wheeler and segmentation based on different personas. Building survey data based personas around ownership patterns for electric 2Wheelers. Mapping consumer decision process for electric 2Wheelers. Analyse the decision influencers and role of influencers in decision making process. Hybrid - Analysis of different hybrid topologies. Feasibility study via simulation and focus group assessments to evaluate the design. PoC will also be tried to validate the concept. Analysis of real data with simulated results will be done to infer potential of the concept. Results: We are trying to understand the mobility demand and the causes…

Approach for CO2 Reduction in India’s Automotive Sector

Maruti Suzuki India Ltd.-Gaurab Bhowmick, Dr. Tapan Sahoo, Anoop Bhat, Gaurav Mathur, Deepak Gambhir
  • Technical Paper
  • 2019-28-2388
To be published on 2019-11-21 by SAE International in United States
India has gone through a lot of transformation over the last decade. Today it is the 6th largest and one of the fastest growing economies in the world. Rising income level, increased consumerism, rapid growth in urbanization and digitization have attributed to this change. Government focus on “Make in India” for promoting trade and investment in India have ensured that India emerge as one of the largest growing economies in the world. The automotive industry played a pivotal role in the manufacturing sector to boost economic activities in India. The passenger car market has increased 3 times over the last decade and it has led to increased mobility options for many people across India. However, this has put concerns on the country’s energy security and emission levels. According to IEA’s recent report on global CO2 emission, 32.31 Gt of CO2 emissions were from fuel combustion in 2016, out of which transport sector contributed ~25%. India contributed ~11% of transport emissions in Asia in 2016. This necessitates systematic approach and action plans to curb India’s vehicular…

Impact of Waste Plastic Oil and its Blends on Performance combustion and emission Characteristics of CRDI Engine

MLR Institute Of Technology-Bridjesh Pappula
VIT-AP University-Arani Vijaya Rao Krishna Chaitanya
  • Technical Paper
  • 2019-28-0047
To be published on 2019-10-11 by SAE International in United States
Utilization of diesel is augmented consistently by transportation and industrial sectors which is making its existence obsolete in near future. Tremendous research has been done by many researchers to find an appropriate alternative for diesel fuel, in this scenario abundant acquisition of plastic wastes and their improper retreating techniques has grabbed the attention of researchers to convert them into alternative fuel for IC engines. This experimental investigation aims to study the performance, combustion and emission characteristics of common rail diesel injection (CRDI) fuelled with waste plastic oil and diesel blends at different injection strategies and at various loading conditions. From the results it is observed that slight decline in the thermal efficiency of the engine when operated with waste plastic oil (100%) due to high viscosity and lower heating value. There was a significant reduction in NOx emissions for low injection pressures of plastic diesel blend (P30). This study shows that waste plastic oil blend can be successfully used in the diesel engines without any major modifications.