scholarly journals The effect of LPG injector position on the SI engine operation

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.

A Numerical Simulation of Analysis of Backfiring Phenomena in a Hydrogen-Fueled Spark Ignition Engine

2016 ◽  
Vol 138 (10) ◽  
Author(s):  
K. A. Subramanian ◽  
B. L. Salvi
Keyword(s):  
Greenhouse Gas Emission ◽  
Hot Spot ◽  
Spark Ignition ◽  
Spark Ignition Engine ◽  
Intake Manifold ◽  
Injection Timing ◽  
Si Engine ◽  
Engine Operation ◽  
Study Results ◽  
Residual Gas

Hydrogen utilization in spark ignition (SI) engines could reduce urban pollution including particulate matter as well as greenhouse gas emission. However, backfiring, which is an undesirable combustion process of intake charge in hydrogen-fueled SI engine with manifold-based injection, is one of the major technical issues in view of safety of engine operation. Backfiring occurs generally during suction stroke as the hydrogen–air charge interacts with residual gas, resulting in flame growth and propagation toward upstream of engine's intake manifold, resulting in stalling of engine operation and high risk of safety. This work is aimed at analysis of backfiring in a hydrogen-fueled SI engine. The results indicate that backfiring is mainly function of residual gas temperature, start of hydrogen injection timing, and equivalence ratio. Any hot-spot present in the cylinder would act as ignition source resulting in more chances of backfiring. In addition to this, computational fluid dynamics (CFD) analysis was carried out in order to assess flow characteristics of hydrogen and air during suction stroke in intake manifold. Furthermore, numerical analysis of intake charge velocity, flame speed (deflagration), and flame propagation (backfiring) toward upstream of intake manifold was also carried out. Some notable points of backfiring control strategy including exhaust gas recirculation (EGR) and retarded (late) hydrogen injection timing are emerged from this study for minimizing chance of backfiring. This study results are useful for development of dedicated SI engine for hydrogen fuel in the aspects of elimination of backfiring.

scholarly journals The evaluation of the regularity of the combustion process in the SI engine fueled with petrol and ethanol

2017 ◽  
Vol 168 (1) ◽  
pp. 94-99
Author(s):  
Zdzisław STELMASIAK ◽  
Dariusz PIETRAS
Keyword(s):  
Ethyl Alcohol ◽  
Research Work ◽  
Combustion Process ◽  
Spark Ignition Engine ◽  
Dual Fuel ◽  
Performance Parameters ◽  
Si Engine ◽  
Inlet Valve ◽  
Engine Operation ◽  
The Subject

In the paper are presented results of a research work concerning automotive spark ignition engine fueled with ethyl alcohol. The research was performed on a Fiat 1100 MPI engine adapted to dual fuel feeding. Injection of ethyl alcohol was accomplished in area near inlet valve with use of original injectors, the same as used in case of gasoline feeding. The subject-matter of the study was to compare smoothness of engine operation fueled with alcohol in relation to parameters of the engine fueled traditionally with gasoline. There were analyzed combustion parameters calculated on the basis of recorded indicated diagrams of successive individual combustion cycles and averaged diagrams of successive 50 cycles. Performed investigations are pointing at smooth engine operation running on neat alcohol, and on improvement of performance parameters such as effective power and overall efficiency.

Understanding the Adverse Effects of Inlet Valve Deposits on SI Engine Operation, through a Novel Technique to Create Surrogate Deposits

2018 ◽  
Author(s):  
Andreas F. G. Glawar ◽  
Pauline R. Ziman ◽  
Kaihua Wu ◽  
Vinod Natarajan ◽  
Eike J. Wolgast ◽  
...  
Keyword(s):  
Adverse Effects ◽  
Si Engine ◽  
Inlet Valve ◽  
Engine Operation ◽  
Novel Technique

A Numerical Simulation of Analysis of Backfiring Phenomena in a Hydrogen Fuelled Spark Ignition Engine

2015 ◽  
Author(s):  
K. A. Subramanian ◽  
B. L. Salvi
Keyword(s):  
Hot Spot ◽  
Spark Ignition ◽  
Spark Ignition Engine ◽  
Intake Manifold ◽  
Injection Timing ◽  
Ignition Process ◽  
Si Engine ◽  
Engine Operation ◽  
Study Results ◽  
Residual Gas

Hydrogen utilization in spark ignition engines could reduce urban pollution including particulate matter as well as greenhouse gas (carbon dioxide) emission. However, backfiring, which is an undesirable combustion process of intake charge in hydrogen fuelled spark ignition (SI) engine with manifold based injection, is one of the major technical issues in view of safety as well as continuous engine operation as ignition process could proceed instantaneously due to less ignition energy requirement of hydrogen. Backfiring occurs generally during suction stroke as the hydrogen-air charge interacts with residual gas resulting in flame growth and propagation towards upstream of engine’s intake manifold resulting in stalling of engine operation and high risk of safety. This work is aimed at analysis of backfiring in a hydrogen fuelled SI engine. The results indicate that backfiring is mainly function of residual gas temperature, start of hydrogen injection timing and equivalence ratio. Any hot-spot present in the cylinder would act as ignition source resulting in more chances of backfiring. In addition to this, CFD analysis was carried out in order to assess flow characteristics of hydrogen and air during suction stroke in intake manifold. Furthermore, numerical analysis of intake charge velocity, flame speed (deflagration), and flame propagation (backfiring) towards upstream of intake manifold was also carried out. Some notable points of backfiring control strategy including exhaust gas recirculation (EGR) and retarded (late) hydrogen injection timing are emerged from this study for minimizing chance of backfiring. This study results are useful for development of dedicated spark ignition engine for hydrogen fuel in the aspects of elimination of backfiring.

scholarly journals Optimization of Fuel Consumption of a SI Engine Using Variable Valve Timing and Variable Length Intake Manifold Techniques

2018 ◽  
Vol 2 (2) ◽  
pp. 1-12
Author(s):  
Mohammad Keshavarz ◽  
Mehdi Keshavarz
Keyword(s):  
Fuel Consumption ◽  
Internal Combustion Engines ◽  
Variable Length ◽  
Intake Manifold ◽  
Variable Valve Timing ◽  
Valve Timing ◽  
Si Engine ◽  
World Crisis ◽  
Toxic Emissions ◽  
Variable Valve

According to the world crisis about fuel consumption and environmental concerns regarding toxic emissions of internal combustion engines, the engines with higher efficiency and lower fuel consumption have been a topic of research in last decades. In this study, variable valve timing (VVT) and variable length intake manifold (VLIM) techniques are used to optimize the fuel consumption of an SI engine. At first, all components of engine are modeled in GT-POWER and a comparison with experimental results is performed to confirm the accuracy of the model. Then, the discrete-gird algorithm is employed to optimize the parameters in GT-POWER. The results obtained indicate that optimal valve timing and intake manifold length significantly reduces brake specific fuel consumption (BSFC).

scholarly journals SI engine fuelled by injection of pure propane or pure butane into the intake manifold

2006 ◽  
Vol 125 (2) ◽  
pp. 20-27
Author(s):  
Jerzy DUTCZAK
Keyword(s):  
Liquid Phase ◽  
Single Point ◽  
Test Stand ◽  
Injection System ◽  
Intake Manifold ◽  
Effective Parameters ◽  
Si Engine ◽  
Propane Butane

The results of the simulation and the test stand investigations of the 170.A1 engine fed by the injection of a liquid phase of propane-butane or pure propane and pure butane have been reported in the article. A modified serial single point gasoline injection system and an engine controller of own design engine have been used and discussed. The Comparison of selected engine parameters for given cases of fuelling confirmed the possibility of the use of the evaporating heat of fuel to improve the cylinder filling. The effective parameters of an engine fuelled with pure propane or pure butane were more beneficial than for gasoline fuelling.

Development of a Gas-Phase LPG Injection System for a Small SI Engine

2003 ◽  
Author(s):  
Liguang Li ◽  
Zhimin Liu ◽  
Huiping Wang ◽  
Baoqing Deng ◽  
Zhensuo Wang ◽  
...  
Keyword(s):  
Gas Phase ◽  
Injection System ◽  
Si Engine

A Control-Oriented Polytropic Model of SI Engine Intake Manifold

2003 ◽  
Author(s):  
Josˇko Deur ◽  
Davor Hrovat ◽  
Josˇko Petric´ ◽  
Zˇeljko Sˇitum
Keyword(s):  
Heat Transfer ◽  
Intake Manifold ◽  
Simple Extension ◽  
Si Engine ◽  
Polytropic Model ◽  
Back Flow ◽  
Thermal Transients ◽  
Three State Model ◽  
Transfer Properties ◽  
Variant Structure

The paper presents experimental results which show significant changes of the intake manifold air temperature during fast tip-in/tip-out engine transients. An adequate two-state polytropic manifold model is developed and experimentally validated. An emphasis is on the derivation and parameterization of a time-variant structure of the heat transfer coefficient. The polytropic manifold model is extended to a three-state form for the more general case of different heat transfer properties for the manifold plenum and runners. An influence of the engine back flow on the runner thermal transients is observed. A simple extension of the three-state model with the back flow effect is proposed.

The Research of Lean Combustion Characteristic of Compound Injection System of Direct Injection Engine

2014 ◽  
Vol 532 ◽  
pp. 362-366 ◽  
Author(s):  
Jiang Feng Mou ◽  
Rui Qing Chen ◽  
Yi Wei Lu
Keyword(s):  
Gasoline Engine ◽  
Direct Injection ◽  
Injection System ◽  
Intake Manifold ◽  
Combustion Characteristic ◽  
Injection Timing ◽  
Mixed Gas ◽  
Lean Burn ◽  
Direct Injection Engine ◽  
Lean Combustion

This paper studies the lean burn limit characteristic of the compound injection system of the direct-injection gasoline engine. The low pressure nozzle on the intake manifold can achieve quality homogeneous lean mixture, and the direct injection in the cylinder can realized the dense mixture gas near the spark plug. By adjusting the two injection timing and injection quantity, and a strong intake tumble flow with special shaped combustion chamber, it can produces the reverse tumble to form different hierarchical levels of mixed gas in the cylinder. Experimental results show: the compound combustion system to the original direct-injection engine lean burn limit raise 1.8-2.5 AFR unit.

Sign in / Sign up

Export Citation Format

Share Document