Combustion and Hydrocarbon (HC) Emissions from a Spark-Ignition Engine Fueled with Gasoline and Methanol during Cold Start

2009 ◽  
Vol 23 (10) ◽  
pp. 4937-4942 ◽  
Author(s):  
Jun Li ◽  
Changming Gong ◽  
Bo Liu ◽  
Yan Su ◽  
Huili Dou ◽  
...  
Keyword(s):  
Cold Start ◽  
Spark Ignition ◽  
Spark Ignition Engine ◽  
Hc Emissions

Cold-start performance of an ammonia-fueled spark ignition engine with an on-board fuel reformer

2021 ◽  
Author(s):  
Makoto Koike ◽  
Tetsunori Suzuoki ◽  
Tadashi Takeuchi ◽  
Takayuki Homma ◽  
Satoshi Hariu ◽  
...  
Keyword(s):  
Cold Start ◽  
Spark Ignition ◽  
Spark Ignition Engine

scholarly journals Numerical Study of Engine Performance and Emissions for Port Injection of Ammonia into a Gasoline\Ethanol Dual-Fuel Spark Ignition Engine

2021 ◽  
Vol 11 (4) ◽  
pp. 1441
Author(s):  
Farhad Salek ◽  
Meisam Babaie ◽  
Amin Shakeri ◽  
Seyed Vahid Hosseini ◽  
Timothy Bodisco ◽  
...  
Keyword(s):  
Numerical Study ◽  
Combustion Process ◽  
Engine Performance ◽  
Spark Ignition ◽  
Spark Ignition Engine ◽  
Combustion Model ◽  
Dual Fuel ◽  
Spark Ignition Engines ◽  
Performance And Emissions ◽  
Hc Emissions

This study aims to investigate the effect of the port injection of ammonia on performance, knock and NOx emission across a range of engine speeds in a gasoline/ethanol dual-fuel engine. An experimentally validated numerical model of a naturally aspirated spark-ignition (SI) engine was developed in AVL BOOST for the purpose of this investigation. The vibe two zone combustion model, which is widely used for the mathematical modeling of spark-ignition engines is employed for the numerical analysis of the combustion process. A significant reduction of ~50% in NOx emissions was observed across the engine speed range. However, the port injection of ammonia imposed some negative impacts on engine equivalent BSFC, CO and HC emissions, increasing these parameters by 3%, 30% and 21%, respectively, at the 10% ammonia injection ratio. Additionally, the minimum octane number of primary fuel required to prevent knock was reduced by up to 3.6% by adding ammonia between 5 and 10%. All in all, the injection of ammonia inside a bio-fueled engine could make it robust and produce less NOx, while having some undesirable effects on BSFC, CO and HC emissions.

Effects of injection parameters on the amount of wall-wet fuel in a port-fuel-injected spark-ignition engine during cold start

2019 ◽  
Vol 22 (1) ◽  
pp. 184-198
Author(s):  
Mikiya Araki ◽  
Katsuya Sakairi ◽  
Takashi Kuribara ◽  
Juan C González Palencia ◽  
Seiichi Shiga ◽  
...  
Keyword(s):  
Mass Fraction ◽  
Fuel Injection ◽  
Cold Start ◽  
Spark Ignition ◽  
Stokes Number ◽  
Liquid Films ◽  
Spark Ignition Engine ◽  
Spray Angle ◽  
Short Period ◽  
Two Parameters

In a four-stroke cycle port-fuel-injected spark-ignition engine, a significant portion of unburned hydrocarbons is exhausted during the short period of cold start. The aim of this study is to investigate the physics behind the wall-wet phenomena and its determining parameter as simply as possible even though qualitative to some extent. The test engine is driven at a constant speed of 350 r/min. The fuel injection starts at a certain cycle, and the cycles required for the first ignition is counted. Three gasoline injectors having different atomization characteristics are used for port fuel injection, and the droplet size, the spray angle and the spray velocity are varied independently. The fuel transport phenomena from the injector to the cylinder are characterized by only two parameters, α and β, the mass fraction of the fuel without wall-wet and the mass fraction of the evaporated fuel from liquid films on walls. They are determined so that all the first ignition cycles observed experimentally are consistently reproduced by the model. The value of α is successfully determined for every single injector, and it increases monotonously with the decrease in the Stokes number.

Cold-Start Emissions of an SI Engine Using Butanol/Gasoline Blends

2014 ◽  
Vol 977 ◽  
pp. 47-50
Author(s):  
Mei Yu Shi ◽  
Rong Fu Zhu ◽  
Jiang Li ◽  
Yuan Tao Sun
Keyword(s):  
Low Temperature ◽  
Cold Start ◽  
Fuel Mixture ◽  
Spark Ignition ◽  
Spark Ignition Engine ◽  
Experimental Results ◽  
Si Engine

The influence of butanol/gasoline blends at low temperature for-7°C, on cold-start emissions of a spark-ignition engine was tested. In cold-start period of the engine, the efficiency of the engine was expected to be poor, and the air/fuel mixture would be leaner for the more butanol added. The experimental results showed that the engine could be stable with B10 and B30 in cold-start, and HC and CO emissions reduced more significantly with more butanol added.

Emissions Level Approximation at Cold Start for Spark Ignition Engine Vehicles

2014 ◽  
Vol 555 ◽  
pp. 375-384 ◽  
Author(s):  
Stelian Tarulescu ◽  
Adrian Soica
Keyword(s):  
Cold Start ◽  
Spark Ignition ◽  
Spark Ignition Engine ◽  
Estimation Methods ◽  
Exhaust Gas ◽  
Gas Temperature ◽  
Mathematical Approximation ◽  
Exhaust Gas Temperature ◽  
The Mathematical Model ◽  
Polynomial Regressions

This paper present a study regarding the emissions produced at the engine cold start. Also, the paper presents a brief survey of current extra emissions estimation methods. The main goal of this work is to describe the relative cold start extra emissions as a function of exhaust gas temperature. Experimental research has been done for a light vehicle, Dacia Sandero, equipped with a 1390 cm3 Renault spark ignition engine (Power = 55 kW at 5500 rpm). There were been made several tests, in different temperature conditions, in the could season, using a portable analyzer, GA-21 plus (produced by Madur Austria). The parameters measured with the analyzer and used in the analysis are: CO, NO, NOx and SO2. It was concluded that the highest pollutants values ​​are recorded until the point when the catalyst comes into operation (when the gas temperature entering the catalyst is approx. 200 oC) and exhaust gas temperature is 40-50 oC. In order to accomplish a mathematical approximation of CO, NO and SO2 in function of exhaust gas temperature, logarithmic approximations and polynomial regressions were used. The curves resulted from the mathematical model can be used to approximate the level of CO, NO and SO2, for similar vehicles.

Sign in / Sign up

Export Citation Format

Share Document