scholarly journals Common Rail Direct Injection Mode of CI Engine Operation with Different Injection Strategies - A Method to Reduce Smoke and NOx Emissions Simultaneously

2018 ◽  
Vol 2 (2) ◽  
Author(s):  
Nagaraj R. Banapurmath ◽  
S. V. Khandal ◽  
V. N. Gaitonde ◽  
Virupaxappa S. Yaliwal
Keyword(s):  
Direct Injection ◽  
Common Rail ◽  
Nox Emissions ◽  
Engine Operation ◽  
Injection Mode ◽  
Ci Engine ◽  
Injection Strategies

scholarly journals Effect of Hydrogen Energy Share on a Hydrogen Diesel Dual Fuel Mode using a Common Rail Direct Injection System

2019 ◽  
Vol 9 (1) ◽  
pp. 6463-6469 ◽  
Keyword(s):  
Direct Injection ◽  
Research Work ◽  
Common Rail ◽  
Injection System ◽  
Dual Fuel ◽  
Hydrogen Energy ◽  
Engine Operation ◽  
Brake Thermal Efficiency ◽  
Ci Engine ◽  
Energy Share

This research work was aimed to investigate the maximum possible utilization of hydrogen energy in CI engine with diesel fuel replacement on energy share basis in hydrogen diesel dual fuel (HDDF) mode using common rail direct injection diesel engine. In HDDF mode, experiments were performed at two load conditions such as 3 and 5 bar of brake mean effective pressures (BMEPs). At a BMEP of 3 bar, the maximum hydrogen energy share (HES) could be reached to 50.1% without erratic engine operation, the level of NO, HC, CO and CO2 emissions were decreased up to 18%, 62%, 56% and 45% as compared with neat diesel case. However, there was no significant change in brake thermal efficiency (BTE) and smoke at high HES. At a BMEP of 5 bar, the maximum possible hydrogen energy share was nearly 40%, beyond this energy share severe knocking was noticed. NO emission was raised by 48%, whereas smoke and CO2 emission were decreased up to 20% and 24%. The brake specific HC emission was increased by 42% and there was no significant variation in CO emission with HES

Investigation of Injection Strategies to Improve High Efficiency RCCI Combustion With Diesel and Gasoline Direct Injection

2012 ◽  
Author(s):  
Martin L. Wissink ◽  
Jae H. Lim ◽  
Derek A. Splitter ◽  
Reed M. Hanson ◽  
Rolf D. Reitz
Keyword(s):  
High Efficiency ◽  
Direct Injection ◽  
High Reactivity ◽  
Gasoline Direct Injection ◽  
Cylinder Wall ◽  
Nox Emissions ◽  
Heavy Duty ◽  
Fuel Vaporization ◽  
Heavy Duty Diesel ◽  
Injection Strategies

Experiments were performed to investigate injection strategies for improving engine-out emissions of RCCI combustion in a heavy-duty diesel engine. Previous studies of RCCI combustion using port-injected low-reactivity fuel (e.g., gasoline or iso-octane) and direct-injected high-reactivity fuel (e.g., diesel or n-heptane) have reported greater than 56% gross indicated thermal efficiency while meeting the EPA 2010 heavy-duty PM and NOx emissions regulations in-cylinder. However, CO and UHC emissions were higher than in diesel combustion. This increase is thought to be caused by crevice flows of trapped low-reactivity fuel and lower cylinder wall temperatures. In the present study, both the low- and high-reactivity fuels were direct-injected, enabling more precise targeting of the low-reactivity fuel as well as independent stratification of equivalence ratio and reactivity. Experiments with direct-injection of both gasoline and diesel were conducted at 9 bar IMEP and compared to results from experiments with port-injected gasoline and direct-injected diesel at matched conditions. The results indicate that reductions in UHC, CO, and PM are possible with direct-injected gasoline, while maintaining similar gross indicated efficiency as well as NOx emissions well below the EPA 2010 heavy-duty limit. Additionally, experimental results were simulated using multi-dimensional modeling in the KIVA-3V code coupled to a Discrete Multi-Component fuel vaporization model. The simulations suggest that further UHC reductions can be made by using wider injector angles which direct the gasoline spray away from the crevices.

scholarly journals 2D CFD Simulation of Water Injection Strategies in a Large Marine Engine

2019 ◽  
Vol 7 (9) ◽  
pp. 296 ◽  
Author(s):  
Senčić ◽  
Mrzljak ◽  
Blecich ◽  
Bonefačić
Keyword(s):  
Cfd Simulation ◽  
Soot Formation ◽  
Direct Injection ◽  
Water Injection ◽  
Engine Performance ◽  
Nox Emissions ◽  
Water Emulsion ◽  
Marine Engine ◽  
Soot Emissions ◽  
Injection Strategies

A two-dimensional computational fluid dynamics (2D CFD) simulation of a low-speed two-stroke marine engine simulation was performed in order to investigate the performance of 2D meshes that allow the use of more complex chemical schemes and pollutant formation analysis. Various mesh density simulations were compared with a 3D mesh simulation and with the experimentally obtained cylinder pressure. A heavy fuel model and a soot model were implemented in the software. Finally, the influences of three water injection strategies were simulated and evaluated in order to investigate the capability of the model and the influence of water injection on NOx formation, soot formation, and engine performance. We conclude that the direct water injection strategy reduces NOx emissions without adversely affecting the engine performance or soot emissions. The other two strategies—Intake air humidification and direct injection of fuel–water emulsion—reduced NOx emissions but at the cost of higher soot emissions or reduced engine performance.

Combustion characteristics of a common rail direct injection engine using different fuel injection strategies

2018 ◽  
Vol 134 ◽  
pp. 475-484 ◽  
Author(s):  
Avinash Kumar Agarwal ◽  
Akhilendra Pratap Singh ◽  
Rakesh Kumar Maurya ◽  
Pravesh Chandra Shukla ◽  
Atul Dhar ◽  
...  
Keyword(s):  
Fuel Injection ◽  
Direct Injection ◽  
Combustion Characteristics ◽  
Common Rail ◽  
Direct Injection Engine ◽  
Injection Strategies

Optimization of Multiple Injection Strategies to Improve BSFC Performance of a Common Rail Direct Injection Diesel Engine

2016 ◽  
Author(s):  
Sanjoy Biswas ◽  
Manish Bakshi ◽  
G Shankar ◽  
Achintya Mukhopadhyay
Keyword(s):  
Diesel Engine ◽  
Direct Injection ◽  
Common Rail ◽  
Multiple Injection ◽  
Direct Injection Diesel Engine ◽  
Injection Strategies

A Study on Performance of Common Rail Direct Injection Engine with Multiple-Injection Strategies

2019 ◽  
Vol 45 (2) ◽  
pp. 623-630
Author(s):  
S. V. Khandal ◽  
Yunus Tatagar ◽  
Irfan Anjum Badruddin
Keyword(s):  
Direct Injection ◽  
Common Rail ◽  
Multiple Injection ◽  
Direct Injection Engine ◽  
Injection Strategies

An experimental study of the injection strategies on engine performance of the butanol/biodiesel dual-fuel Intelligent Charge Compression Ignition mode

2020 ◽  
pp. 146808742096399
Author(s):  
Wenbin Zhao ◽  
Yaoyuan Zhang ◽  
Guan Huang ◽  
Zilong Li ◽  
Yong Qian ◽  
...  
Keyword(s):  
Heat Release ◽  
Thermal Efficiency ◽  
Direct Injection ◽  
Dual Fuel ◽  
Injection Timing ◽  
Nox Emissions ◽  
Compression Ignition ◽  
Combustion Mode ◽  
Low Levels ◽  
Injection Strategies

Intelligent Charge Compression Ignition (ICCI) combustion mode is a novel dual-fuel combustion strategy that has been proposed recently. In ICCI combustion mode, two fuels with different reactivity are directly injected during the intake stroke and compression stroke, respectively, to achieve flexible reactivity gradient and equivalence ratio stratification. In this study, experiments were conducted on a single-cylinder diesel engine to investigate the effects of butanol direct injection strategies on the engine running with ICCI combustion mode at a constant speed of 1500 r/min and medium load. Results showed that ICCI combustion mode was composed of premixed heat release and diffusion heat release. In compare, the percentage of premixed heat release was higher than the diffusion heat release. With fixed biodiesel direct injection timing (SOI2), retarding butanol single injection timing (SOI1) would delay combustion phasing while not distinctively affect ignition timing. SOI1 showed significant effect on the thermal efficiency and engine emissions. Indicated thermal efficiency (ITE) decreased at first and then slightly increased with retarding of SOI1, while the nitrogen oxides (NOx) emissions were always at low levels. As the butanol second direct injection timing (SOI1-2) retard and the corresponding energy ratio increase, more butanol entered into the crevice/squish regions, leading to the increase of unburned hydrocarbon (HC) and carbon monoxide (CO) emissions. EGR strategy helps to significantly reduce NOx emissions without affecting ITE although penalized HC and CO emissions are resulted in. The optimum butanol direct injection strategies were butanol single direct injection, especially in the early SOI1, in which the thermal efficiency was higher and emissions were at very low levels (NOx  < 0.4 g/kW h).

scholarly journals Selective Catalyst Reduction (SCR) using Zeolite for Reduction of NOx Emissions in C.I. Engines

2021 ◽  
Author(s):  
Ayush Dwivedi ◽  
Hemraj Chaudhary ◽  
Venkateshwarlu Chintala ◽  
Ashish Karn
Keyword(s):  
Direct Injection ◽  
Nox Emission ◽  
Complete Analysis ◽  
Time Interval ◽  
Nox Emissions ◽  
Selective Catalyst ◽  
Reduction Of Nox ◽  
Ci Engine ◽  
Catalyst Reduction ◽  
Scr System

The current study is aimed for reduction of NOx emission (oxides of nitrogen) from a direct injection CI engine by SCR (selective catalytic reduction) technology. The SCR system was developed originally at the (CAER) Centre for alternate and renewable energy in which zeolite was used as a catalyst. The developed SCR system was integrated with a single chamber direct injection CI engine of 3.7 kW rated power at 1500 rpm. Experimental tests results revealed the significant reduction of NOx emission with SCR system at all engine loads. Experimental design of the investigation typified obtaining standard behaviour of the engine i.e., without SCR followed by engine's information after the presentation of SCR framework. It is investigated from the exploratory tests results that hydrocarbon (HC) emission was highest about 20ppm at 10kg load yet at 4kg load it decreased to 16ppm. Carbon monoxide (CO) emission was moderately increased with SCR system. NOx emission are minimum with SCR at all engine loading conditions as compared to without SCR system. An experimental time study is also done &amp; readings being taken in the time interval of 5 minutes. A difference of 10ppm hydrocarbon emission has been measured in between 15-20 minutes. In the NOx emissions, a difference of 97 ppm has been observed while using the SCR system. Henceforth, the introduction of SCR to the engine minimizes the emissions &amp; enhance the combustion performance along with the benefit of reduction in NOx emissions. After the complete analysis of the data, the outcomes demonstrate a positive impact on the selective catalyst reduction (SCR) system set up with the engine.

scholarly journals Effects of pilot injection timing and EGR on a modern V6 common rail direct injection diesel engine

2013 ◽  
Vol 50 ◽  
pp. 012008 ◽  
Author(s):  
Nik Rosli Abdullah ◽  
Rizalman Mamat ◽  
Miroslaw L Wyszynski ◽  
Anthanasios Tsolakis ◽  
Hongming Xu
Keyword(s):  
Diesel Engine ◽  
Direct Injection ◽  
Common Rail ◽  
Injection Timing ◽  
Pilot Injection ◽  
Direct Injection Diesel Engine
Sign in / Sign up

Export Citation Format

Share Document