Improvement of performance and emission in a lean‐burn gas fuelled spark ignition engine by using a new pre‐chamber

2021 ◽  
Author(s):  
Javad Kheyrollahi ◽  
Samad Jafarmadar ◽  
Shahram Khalilarya ◽  
Seyed R. A. Niaki
Keyword(s):  
Spark Ignition ◽  
Spark Ignition Engine ◽  
Lean Burn ◽  
Performance And Emission

Effect of sucrose catalyst in the catalytic converter on performance and emission of spark ignition engine

2021 ◽  
pp. 1-25
Author(s):  
S Sathyanarayanan ◽  
S Suresh ◽  
M Sridharan
Keyword(s):  
Conversion Efficiency ◽  
Catalytic Converter ◽  
Spark Ignition ◽  
Spark Ignition Engine ◽  
Si Engine ◽  
Lean Burn ◽  
Performance And Emission ◽  
Toxic Emission ◽  
Fuzzy Logic Expert System ◽  
Nox Conversion Efficiency

Abstract In this study, experimental attempts are made to reduce exhaust gas toxic emission from the spark ignition (SI) engine. For this, a sucrose catalyst is coated inside the metallic substrate. The obtained emission level was compared with the results of commercial catalysts for lean-burn operations. The engine was operated at 20%, 40%, 60%, 80% and 100% loads and the highest NOx conversion efficiency of 60.217% at 40% engine load and 70.732% of HC conversion efficiency at 100% engine loadwas achieved. Exhaust emissions from the sucrose-coated catalytic converterare observed as lower than the conventional commercial converter. Also, this paper attempts to predict the emission characteristics of both rigskept under observation using a fuzzy logic expert system (FLES). Both the input and output responses from the real-time SI engine is used to train and test the proposed FLES. The FLES proposed in this study can predict the emission characteristicsof both conventional and sucrose coated catalytic converter with an accuracy of 97%.

Investigation of Cyclic Variation of IMEP Under Lean Burn Operation in Spark-Ignition Engine

1997 ◽  
Author(s):  
Kiyoshi Ishii ◽  
Takashi Sasaki ◽  
Yasuhiro Urata ◽  
Kazuo Yoshida ◽  
Toshihisa Ohno
Keyword(s):  
Spark Ignition ◽  
Spark Ignition Engine ◽  
Cyclic Variation ◽  
Lean Burn

Simulation of Extended Expansion Lean Burn Spark Ignition Engine

2004 ◽  
Author(s):  
A. Manivannan ◽  
R. Ramprabhu ◽  
P. Tamilporai ◽  
S. Chandrasekaran
Keyword(s):  
Heat Transfer ◽  
Compression Ratio ◽  
Thermal Efficiency ◽  
Numerical Study ◽  
Spark Ignition ◽  
Spark Ignition Engine ◽  
Valve Closure ◽  
Intake Valve ◽  
Lean Burn ◽  
Atkinson Cycle

This paper deals with Numerical Study of 4-stoke, Single cylinder, Spark Ignition, Extended Expansion Lean Burn Engine. Engine processes are simulated using thermodynamic and global modeling techniques. In the simulation study following process are considered compression, combustion, and expansion. Sub-models are used to include effect due to gas exchange process, heat transfer and friction. Wiebe heat release formula was used to predict the cylinder pressure, which was used to find out the indicated work done. The heat transfer from the cylinder, friction and pumping losses also were taken into account to predict the brake mean effective pressure, brake thermal efficiency and brake specific fuel consumption. Extended Expansion Engine operates on Otto-Atkinson cycle. Late Intake Valve Closure (LIVC) technique is used to control the load. The Atkinson cycle has lager expansion ratio than compression ratio. This is achieved by increasing the geometric compression ratio and employing LIVC. Simulation result shows that there is an increase in thermal efficiency up to a certain limit of intake valve closure timing. Optimum performance is attained at 90 deg intake valve closure (IVC) timing further delaying the intake valve closure reduces the engine performance.

Sign in / Sign up

Export Citation Format

Share Document