Cause of Exhaust Smoke and Its Reduction Methods in an HSDI Diesel Engine Under High-Speed and High-Load Conditions

2002 ◽  
Author(s):  
Yoshihiro Hotta ◽  
Kiyomi Nakakita ◽  
Takayuki Fuyuto ◽  
Minaji Inayoshi ◽  
Kiyoshi Fujiwara ◽  
...  
Keyword(s):  
Diesel Engine ◽  
High Speed ◽  
High Load ◽  
Reduction Methods ◽  
Hsdi Diesel Engine ◽  
Load Conditions

An Investigation of the Relation Between Combustion Phase and Emissions of ULSD and RME Biodiesel With a Common-Rail HSDI Diesel Engine

2014 ◽  
Author(s):  
Hayder A. Dhahad ◽  
Mohammed A. Abdulhadi ◽  
Ekhlas M. Alfayyadh ◽  
T. Megaritis
Keyword(s):  
Diesel Engine ◽  
Ignition Delay ◽  
High Speed ◽  
Fuel Injection ◽  
High Load ◽  
Diffusion Combustion ◽  
Low Load ◽  
Combustion Phase ◽  
Hsdi Diesel Engine ◽  
And Diffusion

This study investigates the effect of combustion phase (premixed and diffusion phases) duration on the emissions emitted from a high speed direct injection (HSDI) diesel engine fueled with neat (100%) rapeseed methyl ester (RME) and run at a constant speed (1500 rpm) with single injection strategy at constant fuel injection pressure (800 bar) and varying fuel injection timings (−12,−9,−6,−3,0) ATDC, for two loads (2.5 and 5 bars) BMEP. The obtained results were compared with those obtained when the engine run at the same conditions but with ultra-low sulfur diesel fuel (ULSD). In-cylinder pressure was measured and analyzed using (LABVIWE) program. calculation program specially written in (MATLAB) software was used to extract the apparent heat release rate, the ignition delay, combustion duration and specify the amount of heat released during the premixed and diffusion combustion phases (premixed burn fraction PMBF) and (diffusion burn fraction DBF). Emission measurements included; NOx, CO, THC, CO2 and smoke number (SN). The results showed that at high load, RME generate higher NOx, CO and THC. Measurements and calculations indicated that ignition delay of RME was shorter than that of ULSD, which means less PMBF. This conflicting effect is probably due to the advanced start of combustion (SOC) leading to higher combustion temperature inside the combustion chamber and there will be less time available to complete the combustion. The emission results at low load showed that NOx and CO, generated by RME were less than those generated by USLD. USLD produced soot more than RME at high load and less at low load.

CFD Modelling of the Effects of Injection Timing on the Combustion Process and Emissions in an HSDI Diesel Engine

2012 ◽  
Author(s):  
Raouf Mobasheri ◽  
Zhijun Peng
Keyword(s):  
Diesel Engine ◽  
High Speed ◽  
Cfd Simulation ◽  
Direct Injection ◽  
Combustion Process ◽  
Injection Timing ◽  
Cfd Modelling ◽  
Combustion Modeling ◽  
Pressure Trace ◽  
Hsdi Diesel Engine

High-Speed Direct Injection (HSDI) diesel engines are increasingly used in automotive applications due to superior fuel economy. An advanced CFD simulation has been carried out to analyze the effect of injection timing on combustion process and emission characteristics in a four valves 2.0L Ford diesel engine. The calculation was performed from intake valve closing (IVC) to exhaust valve opening (EVO) at constant speed of 1600 rpm. Since the work was concentrated on the spray injection, mixture formation and combustion process, only a 60° sector mesh was employed for the calculations. For combustion modeling, an improved version of the Coherent Flame Model (ECFM-3Z) has been applied accompanied with advanced models for emission modeling. The results of simulation were compared against experimental data. Good agreement of calculated and measured in-cylinder pressure trace and pollutant formation trends were observed for all investigated operating points. In addition, the results showed that the current CFD model can be applied as a beneficial tool for analyzing the parameters of the diesel combustion under HSDI operating condition.

Study on the Application of Marine Biodiesel on High Speed Diesel Engines

2011 ◽  
Vol 287-290 ◽  
pp. 1976-1979
Author(s):  
Lin Cai Ma ◽  
Zhi Guo Zhou ◽  
Liang Yao Xia ◽  
Da Xue Liu ◽  
Xiao Li Yu
Keyword(s):  
Diesel Engine ◽  
High Speed ◽  
Consumption Rate ◽  
Effective Power ◽  
Engine Load ◽  
Bench Tests ◽  
Fuel Consumption Rate ◽  
High Speed Diesel ◽  
Hc Emissions ◽  
Load Conditions

A bench tests were carried out on an YC6J190 diesel engine fueled with B20 marine biodiesel. The results showed that the engine’s effective power decreased by 1.8%, the fuel consumption rate increased by 0.07%, HC emissions decreased by 19.17% and the soot decreased by 25% as average under full engine load conditions. HC decreased by 23.4% and the soot decreased by 23% as average under part engine load conditions. The soot emissions decreased by 28.8% as average under the free acceleration conditions.

Multi-Valve High-Speed Direct Injection Diesel Engines—the Design Challenge

1993 ◽  
Vol 207 (4) ◽  
pp. 307-315
Author(s):  
I P Gilbert ◽  
A R Heath ◽  
I D Johnstone
Keyword(s):  
Diesel Engine ◽  
Fuel Economy ◽  
Cylinder Head ◽  
High Speed ◽  
Fuel Injection ◽  
Direct Injection ◽  
Selection Strategy ◽  
Design Challenge ◽  
Hsdi Diesel Engine ◽  
High Level

The need to increase power, to improve fuel economy and to meet stringent exhaust emissions legislation with a high level of refinement has provided a challenge for the design of a compact high-speed direct injection (HSDI) diesel engine. This paper describes various aspects of cylinder head design with particular consideration of layout and number of valves, valve actuation, port selection strategy, fuel injection systems and cylinder head construction.

Simultaneous high-speed visualization of soot luminosity and OH∗ chemiluminescence of alternative-fuel combustion in a HSDI diesel engine under realistic operating conditions

2012 ◽  
Vol 159 (7) ◽  
pp. 2516-2529 ◽  
Author(s):  
Markus Jakob ◽  
Thomas Hülser ◽  
Andreas Janssen ◽  
Philipp Adomeit ◽  
Stefan Pischinger ◽  
...  
Keyword(s):  
Diesel Engine ◽  
High Speed ◽  
Alternative Fuel ◽  
Fuel Combustion ◽  
Operating Conditions ◽  
Hsdi Diesel Engine

Cycle-to-Cycle NO and NOx Emissions From a HSDI Diesel Engine

2018 ◽  
Author(s):  
Felix Leach ◽  
Martin Davy ◽  
Mark Peckham
Keyword(s):  
Diesel Engine ◽  
High Speed ◽  
Nox Emissions ◽  
Nox Formation ◽  
Reduction Techniques ◽  
Light Duty ◽  
Peak Cylinder Pressure ◽  
Crank Angle ◽  
The Difference ◽  
Hsdi Diesel Engine

Engine-out NOx emissions from diesel engines continue to be a major topic of research interest. While substantial understanding has been obtained of engine-out (i.e. before any aftertreatment) NOx formation and reduction techniques, not least EGR which is now well established and fitted to production vehicles, much less data are available on cycle resolved NOx emissions. In this work, crank-angle resolved NO and NOx measurements have been taken from a high-speed light duty diesel engine at test conditions both with and without EGR. These have been combined with 1D data of exhaust flow and this used to form a mass average of NO and NOx emissions per cycle. These results have been compared with combustion data and other emissions. The results show that there is a very strong correlation (R2 > 0.95) between the NOx emitted per cycle and the peak cylinder pressure of that cycle. In addition, the crank-angle resolved NO and NOx measurements also reveal that there is a difference in NO : NO2 ratio (where NO2 is assumed to be the difference between NO and NOx) during the exhaust period, with proportionally more NO2 being emitted during the blowdown period compared to the rest of the exhaust stroke.

A High-Speed Direct Injection Diesel Engine for Passenger Cars

1988 ◽  
Vol 202 (3) ◽  
pp. 171-181 ◽  
Author(s):  
J A Stephenson ◽  
B A Hood
Keyword(s):  
Diesel Engine ◽  
High Speed ◽  
Fuel Injection ◽  
Direct Injection ◽  
Injection System ◽  
Passenger Cars ◽  
Medium Speed ◽  
Medium Speed Engine ◽  
Hsdi Diesel Engine ◽  
Wide Speed Range

The paper describes the development of a high-speed direct injection (HSDI) diesel engine suitable for passenger car applications. The evolution from a low emissions medium-speed engine, through a four-cylinder 2.3 litre research engine, into a four-cylinder 2.0 litre production engine is presented. The challenge to the engineer has been to develop the HSDI engine to operate with acceptable noise, emissions, smoke and driveability over the wide speed range (up to 5000 r/min) required for passenger cars. The key element in this task was the optimization of the combustion system and fuel injection equipment. The HSDI is shown to have a significant fuel economy advantage over the prechamber indirect injection (IDI) engine. Future developments of the fuel injection system are described which will further enhance the HSDI engine and provide additional noise and emissions control.

New Downsized Diesel Engine Concept with HCCI Combustion at High Load Conditions

2015 ◽  
Author(s):  
Andrey Kuleshov ◽  
Alexey Kuleshov ◽  
Khamid Mahkamov ◽  
Timo Janhunen ◽  
Victor Akimov
Keyword(s):  
Diesel Engine ◽  
High Load ◽  
Hcci Combustion ◽  
Engine Concept ◽  
Load Conditions

Optimization of Injector Spray Configurations for an HSDI Diesel Engine at High Load

2007 ◽  
Author(s):  
Michael J. Bergin ◽  
Rolf D. Reitz
Keyword(s):  
Diesel Engine ◽  
Large Diameter ◽  
Orientation Angle ◽  
Merit Function ◽  
High Load ◽  
Operating Conditions ◽  
Injection Timing ◽  
Swirl Ratio ◽  
Start Of Injection ◽  
Hsdi Diesel Engine

CFD simulations were conducted with the KIVA-3v code with improved spray and combustion sub-models. Combustion analysis was performed using micro-genetic optimizations for a 1.9L HSDI diesel engine at a high load operating conditions (∼15 bar imep). The study explored injector spray configurations, including the number of injector nozzle holes, the hole diameters, and their orientations. The engine swirl ratio and start-of-injection timing were also varied. The optimizations considered injector nozzles with 14, 12, 10 and 8 injector holes. Each configuration included consideration of a pair of injector holes. Variations in the orientation angle of the first hole were explored. For the second hole, both the orientation angle and the azimuthal spacing relative to the first hole were varied. The chosen parameters allowed the holes to be symmetrically spaced or coincident azimuthally. The performance of each simulation was based on a merit function which accounts for fuel economy, NOx and soot emissions. For the test conditions chosen, an 8-hole injector configuration was found to be the best. This is explained by the improved fuel spray penetration and mixing associated with a smaller number of large diameter nozzle holes. For all injector configurations, the optima selected groups of holes where the total angular spacing between holes was less than eight degrees. The optimum swirl ratio found was approximately that of the baseline engine design.

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