The effects of stratified lean combustion and exhaust gas recirculation on combustion and emission characteristics of an LPG direct injection engine

Kim, Tae Young; Park, Cheolwoong; Oh, Sung‐Yong; Cho, Gyuback

doi:10.1016/j.energy.2016.09.025

Cited by 49 publications

(10 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore, a number of research studies are focused to stratified charge engine and lean combustion due to improved spark ignition (SI) engine combustion. Kim et al have experimentally studied the stratified lean combustion under exhaust gas recirculation condition in SI engine. They showed that stratified lean combustion strategy had significant effects on improving the combustion efficiency.…”

Section: Introductionmentioning

confidence: 99%

Investigation of multistage injection strategies in a DISI engine fueled with methane under stratified charge lean combustion conditions

Fırat

2020

Env Prog and Sustain Energy

View full text Add to dashboard Cite

A three‐dimensional numerical study has been performed to study combustion and emission of methane in a stratified charge direct injection spark ignition engines under the multistage injection strategies. Firstly, the combustion and emission characteristics of a single‐injection strategy were investigated, and then the effects of two‐stage and three‐stage injection strategies of the injected fuel on combustion and emissions were analyzed. This simulation was run from intake valve opening to exhaust valve opening under stratified charge conditions using the ANSYS Forte numerical software. The Discrete Particle Ignition Kernel Flame model was used to investigate the ignition process and also the combustion and flame propagation were simulated with the G‐equation model. The numerical results show that the multistage injection strategies achieve a significant improvement in the cylinder pressure and combustion efficiency, while reducing NOx, CO, and unburned hydrocarbon emissions compared to single‐injection strategy under stratified charge conditions. Also, the efficient multistage injection strategies enhanced the benefits of the emission reduction in the stratified lean combustion with additional increases of combustion efficient.

show abstract

Section: Introductionmentioning

confidence: 99%

Investigation of multistage injection strategies in a DISI engine fueled with methane under stratified charge lean combustion conditions

Fırat

2020

Env Prog and Sustain Energy

View full text Add to dashboard Cite

show abstract

“…Charge dilution is an effective pathway to improve engine thermal efficiency. Lean burn (air dilution) technology has been shown to enhance the efficiency of gasoline engines; , the essence of lean burn is excessive air dilution. The lean burn reduces particle emissions, improves the fuel economy, and enhances the engine performance .…”

Section: Introductionmentioning

confidence: 99%

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

Zhao

Wang

2020

ACS Omega

View full text Add to dashboard Cite

Biobutanol is a promising alternative fuel for sparkignition engines. Exhaust gas recirculation (EGR) and air dilution were evaluated on a TGDI engine fueled with butanol−gasoline (B20) in view of engine operation, efficiency, gaseous emissions, and PM emissions. For the B20 engine, EGR affected combustion more strongly than excess air dilution; the brake thermal efficiency (BTE) under excess air dilution was much higher than that with EGR. The oxygen concentration in the cylinder was also markedly reduced with EGR relative to air dilution, as the partial fresh charge was substituted with nonreactive gas. A reduced oxygen concentration contributed to differences in combustion between excess air dilution and EGR. Higher BTE was observed during combined EGR and excess air dilution operation, though it was slightly lower than that under excess air dilution alone. NO x was also markedly reduced by the combination of EGR and excess air dilution, but was slightly higher than that with EGR alone. Under combined dilution conditions, the particle number (PN) emissions from the B20 engine were reduced significantly, particle sizes decreased, and the nucleate PN significantly decreased.

show abstract

“…This strategy is pursued in the fourth generation of converter kits, in which injection duration and ignition timing are controlling by engine control module (ECM) based on analogue and digital data from the engine sensors. However, to date, LPDI is still being developed due to many challenges in complex control systems and the selection of materials for injectors to be able at high temperatures [10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Energy Efficiency Ratio (EER) of Novel Air Conditioning System on LPG Fuelled Vehicle: A Lab-Scale Investigation

Setiyo¹,

Waluyo²,

Gobbato³

et al. 2019

IJAME

View full text Add to dashboard Cite

Alternative fuels have become an effective solution to reduce the impact of road transport on the environment. On the other hand, the growing uses of air-conditioning (AC) have contributed to worsening the fuel economy of passenger vehicles. Liquid petroleum gas (LPG), if injected in the gaseous phase to power SI engines, may allow reducing the fuel consumption due to AC devices through the recovery of cooling energy from the fuel systems. This paper presents lab-scale tests of an air conditioning system prototype for LPG-fuelled vehicles. The prototype has been assembled using standard vehicle components to quantify the cooling energy recoverable from the LPG evaporation before the fuel is injected into the engine intake manifold. Temperature and humidity of the air exiting the LPG evaporator are measured for fuel mass flow rates typical of light-duty vehicles. The energy efficiency ratio (EER) of the prototype achieves 2.72 when cooling power equals 1.2 kW. Although the system tested needs improvements, the experimental data show that the cooling energy recovered by LPG evaporation can significantly reduce the power consumption of standard AC systems in passenger cars.

show abstract

The effects of stratified lean combustion and exhaust gas recirculation on combustion and emission characteristics of an LPG direct injection engine

Cited by 49 publications

References 34 publications

Investigation of multistage injection strategies in a DISI engine fueled with methane under stratified charge lean combustion conditions

Investigation of multistage injection strategies in a DISI engine fueled with methane under stratified charge lean combustion conditions

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

Energy Efficiency Ratio (EER) of Novel Air Conditioning System on LPG Fuelled Vehicle: A Lab-Scale Investigation

Contact Info

Product

Resources

About