A Computational Investigation of the Simultaneous Effects of Injection Pressure and EGR on Mixture Preparation and Engine Performance in a High Speed Direct Injection (HSDI) Diesel Engine

2017 ◽  
Author(s):  
Raouf Mobasheri ◽  
Rahman Akbari
Keyword(s):  
Diesel Engine ◽  
High Speed ◽  
Direct Injection ◽  
Engine Performance ◽  
Injection Pressure ◽  
Computational Investigation ◽  
Mixture Preparation ◽  
Hsdi Diesel Engine

Study of nozzle characteristics on the performance of a small-bore high-speed direct injection diesel engine

2002 ◽  
Vol 3 (2) ◽  
pp. 69-79 ◽  
Author(s):  
M-S Lyu ◽  
B-S Shin
Keyword(s):  
Diesel Engine ◽  
Fuel Consumption ◽  
High Speed ◽  
Direct Injection ◽  
Engine Performance ◽  
Vehicle Simulation ◽  
Direct Injection Diesel Engine ◽  
Long Time ◽  
Hsdi Diesel Engine ◽  
Swept Volume

As Co2 emissions from vehicles are gaining global attention, the low fuel consuming powertrain is in much greater demand than before. Some alternatives are suggested but the high-speed direct injection (HSDI) diesel engine would be the most realistic solution. Vehicle simulation shows that a car with low fuel consumption can be realized by applying a 1–1.2 L high-speed direct injection diesel engine in vehicles weighing about 750 kg. Although the direct injection diesel engine has been researched for a long time, enhancement of mixing between air and fuel in a limited space makes it a challenging area to develop a small swept volume HSDI diesel engine. The authors are investigating small HSDI diesel engine combustion technologies in an effort to realize a low fuel consumption vehicle. The main objective in this study is to obtain a better understanding of the combustion-related parameters from such a small size HSDI diesel engine in order to improve engine performance.

scholarly journals Influence of Ultra Injection Pressure with Dynamic Injection Timing on CRDI Engine Performance Using Simarouba Biodiesel Blends

2018 ◽  
Vol 15 (4) ◽  
pp. 5748-5759
Author(s):  
Srinath Pai ◽  
Abdul Sharief ◽  
Shiva Kumar
Keyword(s):  
Diesel Engine ◽  
High Speed ◽  
Direct Injection ◽  
Engine Performance ◽  
Injection Pressure ◽  
Injection Timing ◽  
Brake Thermal Efficiency ◽  
High Speed Diesel ◽  
Performance And Emissions ◽  
Smoke Opacity

A single cylinder diesel engine upgraded to operate Common Rail Direct Injection (CRDI) system and employed in this investigation. Tests were conducted on this engine using High-Speed diesel (HSD) and Simarouba biodiesel (SOME) blends to determine the influence of Injection Pressure (IP) and Injection Timing (IT) on the performance and emissions. Four unique IP of 400 bar to 1000 bar, in steps of 200 bar and four differing ITs of 10°, 13°, 15° and 18° before Top Dead Center (bTDC) combinations were attempted for the 25% to full load. Compression Ratio (CR) of 16.5 and Engine speed of 1500 RPM was kept constant during all trails. Critical performance parameter like Brake Thermal Efficiency (BTE) and Brake Specific Fuel Consumption (BSFC) were analyzed, primary emission parameters of the diesel engine The NOx and Smoke opacity were recorded. Finally, the outcomes of each combination were discussed.

scholarly journals Performance of HSDI diesel-engine generator using the blend of B5, n-butanol and ethanol as increased to 20%

2020 ◽  
Vol 182 ◽  
pp. 02001
Author(s):  
Ekkachai Sutheerasak ◽  
Worachest Pirompugd ◽  
Wirogana Ruengphrathuengsuka
Keyword(s):  
Nitric Oxide ◽  
Carbon Monoxide ◽  
Diesel Engine ◽  
High Speed ◽  
Direct Injection ◽  
Electrical Power ◽  
Engine Performance ◽  
Black Smoke ◽  
Ethanol Blends ◽  
Hsdi Diesel Engine

B5, diesel mixed with 5% biodiesel, is currently being developed to replace diesel, but there was lower engine performance. To improve the B5 properties, the addition of oxygenated additive is a better method. This research aims to study the performance of a high-speed direct injection (HSDI) diesel-engine generator at speed 3,000 rpm and different loads by using B5 blended to n-butanol and ethanol as increased to 20%. Results show that the use of B5-butanol-ethanol blends decreased engine performance as increasing ethanol; however, the release of nitric oxide, carbon monoxide, and black smoke was remarkably reduced as compared with B5. However, the use of B5 blended to 5% n-butanol, and 5% ethanol increased the electrical power to 0.33%, while electrical efficiency was added to 1.13%, and SFC was similar to B5. Therefore, this ratio can be applied with the diesel engines in the future.

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.

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.

Effect of Swirl Ratio and Injection Pressure on Autoignition, Combustion and Emissions in a High Speed Direct Injection Diesel Engine Fuelled With Biodiesel (B-20)

2009 ◽  
Author(s):  
Vinay Nagaraju ◽  
Mufaddel Dahodwala ◽  
Kaushik Acharya ◽  
Walter Bryzik ◽  
Naeim A. Henein
Keyword(s):  
Diesel Engine ◽  
High Speed ◽  
Direct Injection ◽  
Injection Pressure ◽  
Combustible Mixture ◽  
Injection System ◽  
Ignition Process ◽  
Swirl Ratio ◽  
Mixture Formation ◽  
Physical And Chemical

Biodiesel has different physical and chemical properties than ultra low sulfur diesel fuel (ULSD). The low volatility of biodiesel is expected to affect the physical processes, mainly fuel evaporation and combustible mixture formation. The higher cetane number of biodiesel is expected to affect the rates of the chemical reactions. The combination of these two fuel properties has an impact on the auto ignition process, subsequently combustion and engine out emissions. Applying different swirl ratios and injection pressures affect both the physical and chemical processes. The focus of this paper is to investigate the effect of varying the swirl ratio and injection pressure in a single-cylinder research diesel engine using a blend of biodiesel and ULSD fuel. The engine is a High Speed Direct Injection (HSDI) equipped with a common rail injection system, EGR system and a swirl control mechanism. The engine is operated under simulated turbocharged conditions with 3 bar Indicated Mean Effective Pressure (IMEP) at 1500 rpm, using 100% ULSD and a blend of 20% biodiesel and 80% ULSD fuel. The biodiesel is developed from soy bean oil. A detailed analysis of the apparent rate of heat release (ARHR) is made to determine the role of the biodiesel component of B-20 in the combustible mixture formation, autoignition process, premixed, mixing controlled and diffusion controlled combustion fractions. The results explain the factors that cause an increase or a drop in NOx emissions reported in the literature when using biodiesel.

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.

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