Combined Effects of Spark Discharge Pattern and Tumble Level on Cycle-to-Cycle Variations of Combustion at Lean Limits of SI Engine Operation

The consequence of mixing pure ethanol with gasoline on the pollution and performance of SI engine are investigated experimentally in the existent study. The SI engine that employed in the experiment is a single cylinder four stroke. Analysis is carried out for engine operation parameter, CO2, CO and unburned HC productions. The measurements are recorded for several engine speeds from 1500 – 3000 rpm with load and ethanol addition of (0E, 10E, 20E, 30E, 40E, 50E,). The results displayed increasing in brake power, and brake thermal efficiency while the brake specific fuel consumption decreases when the ethanol- gasoline blends fuel increases. Also it was found that CO, HC, and CO2 concentrations decrease when the ethanol- gasoline increases. The best results obtained in the study is for the blend of E-50.

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Combined Effects of Cooled EGR and Air Dilution on Butanol–Gasoline TGDI Engine Operation, Efficiency, Gaseous, and PM Emissions

ACS Omega ◽

10.1021/acsomega.9b04279 ◽

2020 ◽

Vol 5 (12) ◽

pp. 6556-6565

Author(s):

Lifeng Zhao ◽

Defu Wang

Keyword(s):

Combined Effects ◽

Engine Operation ◽

Operation Efficiency

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Thermodynamic Analysis of SI Engine Operation on Variable Composition Biogas-Hydrogen Blends Using a Quasi-Dimensional, Multi-Zone Combustion Model

SAE International Journal of Engines ◽

10.4271/2009-01-0931 ◽

2009 ◽

Vol 2 (1) ◽

pp. 880-910 ◽

Cited By ~ 14

Author(s):

C.D. Rakopoulos ◽

C.N. Michos ◽

E.G. Giakoumis

Keyword(s):

Thermodynamic Analysis ◽

Variable Composition ◽

Combustion Model ◽

Si Engine ◽

Engine Operation

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The effect of LPG injector position on the SI engine operation

Combustion Engines ◽

10.19206/ce-117315 ◽

2007 ◽

Vol 131 (4) ◽

pp. 33-41

Author(s):

Piotr JAKLIŃSKI ◽

Łukasz GRABOWSKI ◽

Mirosław WENDEKER ◽

Jacek CZARNIGOWSKI ◽

Piotr SZCZĘSNY ◽

...

Keyword(s):

Peak Pressure ◽

Injection System ◽

Intake Manifold ◽

Si Engine ◽

Inlet Valve ◽

Engine Operation ◽

Toxic Emissions ◽

Pressure Peak ◽

Operation Parameters

The paper presents results of experiments on operation parameters of a 4-cylinder Holden 2.0 MPFI engine, supplied with LPG by means of sequential intake-manifold injection system, in the function of the distance between the injection ferrule and the cylinder’s inlet valve. Four positions of the injection ferrule along the manifold were tested, i.e. 115, 170, 230 and 310 mm from the valve. Indicated pressure, peak pressure and toxic emissions, in the function of injection start angle, were analyzed and compared for each position. The importance of the distance between injection ferrule and inlet valve was proved.

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Improving the effective efficiency of a spark ignition engine through the use of a fully independent valve control system

Combustion Engines ◽

10.19206/ce-141541 ◽

2021 ◽

Author(s):

Zbigniew Żmudka ◽

Stefan Postrzednik

Keyword(s):

Charge Exchange ◽

Spark Ignition Engine ◽

Theoretical Research ◽

Si Engine ◽

Load Range ◽

Engine Operation ◽

Engine Load ◽

Effective Work ◽

Partial Load ◽

Valve Control

The article presents theoretical research of the proposed system of fully independent valve control (FIVC) of the SI engine. The analysis included controlling the movement of the intake valves, which results in adjusting the mass of the fresh charge to the current engine load, as well as the movement of the exhaust valves, where the main aim is to keep the rest of the exhaust gas in the cylinder, i.e. implementation of internal EGR. The open theoretical Seiliger-Sabathe cycle with the classic throttle regulation of load is the reference cycle for assessment of benefits and study of the effectiveness of obtaining work as a result of application of the FIVC system. A comparative analysis of the effectiveness of application of the proposed system was carried out based on the selected quantities: fuel dose, cycle work, relative work of charge exchange and cycle efficiency. The use of the FIVC to regulate the SI engine load makes it possible to eliminate the throttle and thus reduce the charge exchange work, especially in the partial load range. And this then leads to an increase in internal and effective work, which in turn results in an increase in the effective energy efficiency of an engine operation.

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Performances of a Research CFR Octane Rating Unit Engine and Dacia Single Cylinder SI Engine Ignited by a LASER System

E3S Web of Conferences ◽

10.1051/e3sconf/201911201009 ◽

2019 ◽

Vol 112 ◽

pp. 01009

Author(s):

Bogdan George Done ◽

Ion Copae

Keyword(s):

New Technologies ◽

Combustion Process ◽

Pollutant Emissions ◽

Laser Medium ◽

Si Engine ◽

Engine Operation ◽

Single Cylinder ◽

Spark Plug ◽

Octane Rating ◽

Laser Spark

At this time, the severe legislation regarding the level limits of the waste and exhaust gases released by thermal engines and also the necessity of engines efficiency improvement boost the engine research domain to bring in front the use of new technologies that can be used to control the in-cylinder combustion process. Now, the new technologies is represented by LASER spark plug systems which can be successfully used at petrol engines. LASER spark plug technology can have many advantages for engine operation control, an ignition system that could provide improved combustion is the one using plasma generation and a Q-switched LASER that results in pulses with high MW power. The LASER spark plug device used in the current research was a LASER medium Nd:YAG/Cr4+:YAG ceramic structure made up of a 8.0-mm long, 1.0-at.% Nd:YAG ceramic, optically-bonded to a Cr4+:YAG c. It was developed and constructed similar to classical spark plug and could be assembled on a CFR Octane Rating Unit Engine as well as on a Dacia Single Cylinder SI Engine which led to several results among which: influences on in-cylinder pressure, combustion and pollutant emissions.

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