EFFECT OF AIR-FUEL RATIO ON SYNGAS COMBUSTION IN AN OPTICALLY ACCESSIBLE SPARK IGNITION ENGINE

2017 ◽  
Author(s):  
santiago daniel martinez boggio ◽  
Pedro Lacava ◽  
Maycon Silva ◽  
SIMONA MEROLA ◽  
Adrian Irimescu ◽  
...  
Keyword(s):  
Spark Ignition ◽  
Spark Ignition Engine ◽  
Fuel Ratio ◽  
Syngas Combustion

Multi-Level Modeling of Real Syngas Combustion in a Spark Ignition Engine and Experimental Validation

2019 ◽  
Author(s):  
Carmine Caputo ◽  
Domenico Cirillo ◽  
Michela Costa ◽  
Gabriele Di Blasio ◽  
Maria Di Palma ◽  
...  
Keyword(s):  
Experimental Validation ◽  
Spark Ignition ◽  
Spark Ignition Engine ◽  
Syngas Combustion ◽  
Multi Level

Linear Parameter-Varying Lean Burn Air-Fuel Ratio Control for a Spark Ignition Engine

2007 ◽  
Vol 129 (4) ◽  
pp. 404-414 ◽  
Author(s):  
Feng Zhang ◽  
Karolos M. Grigoriadis ◽  
Matthew A. Franchek ◽  
Imad H. Makki
Keyword(s):  
Time Delay ◽  
Spark Ignition ◽  
Spark Ignition Engine ◽  
Linear Parameter ◽  
Lean Burn ◽  
Linear Parameter Varying ◽  
Variable Time Delay ◽  
Variable Time ◽  
Fuel Ratio ◽  
Parameter Varying

Maximization of the fuel economy of the lean burn spark ignition (SI) engine strongly depends on precise air-fuel ratio control. A great challenge associated with the air-fuel ratio feedback control is the large variable time delay in the exhaust system. In this paper, a systematic development of an air-fuel ratio controller based on post lean NOx trap (LNT) oxygen sensor feedback using linear parameter-varying (LPV) control is presented. Satisfactory stability and disturbance rejection performance is obtained in the face of the variable time delay. The LPV controller is simplified to an explicit parameterized gain scheduled lead-lag controller form for the ease of implementation. A Ford F-150 truck with a V8 4.6 l lean burn engine was used to demonstrate the LPV air-fuel ratio control design. Both simulation and experimental results demonstrate that the designed controller regulates the tailpipe air-fuel ratio to the preset reference for the full engine operating range.

scholarly journals Measurement of the air-to-fuel ratio inside a passive pre-chamber of a fired spark-ignition engine

2020 ◽  
Vol 5 (3-4) ◽  
pp. 147-157
Author(s):  
Nicolas Wippermann ◽  
Olaf Thiele ◽  
Olaf Toedter ◽  
Thomas Koch
Keyword(s):  
Spark Ignition ◽  
Spark Ignition Engine ◽  
Engine Operation ◽  
Ratio Measurement ◽  
Fuel Ratio ◽  
Mixture Preparation ◽  
Fuel Delivery ◽  
Absorption Of Light ◽  
Mass Flows ◽  
Motored Engine

Abstract This paper investigates the local air-to-fuel ratio measurement within the pre-chamber of a spark-ignition engine by determining the absorption of light from hydrocarbons using an infrared sensor. The measurement was performed during fired and motored engine operation points and compared to the more common exhaust lambda measurements. The experiment provided data to compare the mixture preparation in a hot and cold environment of pre-chamber and main combustion chamber. The experiment also gives an indication regarding the possible use of a pre-chamber sensor in a motored engine at higher boost pressures and fuel mass flows, operation points that would overheat the sensor in a fired engine. The work also includes the analysis of the fuel delivery into the pre-chamber of a direct and indirect injection engine. Furthermore, pressure and temperature measurement within the pre-chamber provides information about the critical sensor environment and helps to understand the gas exchange between the two volumes.

Optimizing local charge stratification in a lean-burn spark ignition engine

1997 ◽  
Vol 211 (2) ◽  
pp. 145-154 ◽  
Author(s):  
C Arcoumanis ◽  
D. R. Hull ◽  
J. H. Whitelaw
Keyword(s):  
Equivalence Ratio ◽  
Peak Pressure ◽  
Spark Ignition ◽  
Flame Speed ◽  
Spark Ignition Engine ◽  
Local Injection ◽  
Combustion Pressure ◽  
Rich Mixture ◽  
Fuel Ratio ◽  
Homogeneous Charge

Gas pressure and local gas velocities have been measured in a single-cylinder spark ignition engine operating at low load and 1000 r/min and the results have characterized the extent to which combustion was enhanced by the injection of a small quantity of a mixture of propane vapour and air towards the spark plug in an otherwise quiescent chamber filled with a homogeneous lean propane/air charge. The effects of the locally generated mean flow/turbulence and equivalence ratio on combustion were examined separately by first injecting a mixture of equivalence ratio identical to that of the homogeneous charge and then a slightly rich mixture into homogeneous charges of lower equivalence ratios. The results show the advantageous effect of jet-induced local turbulence for overall air—fuel ratios between 17 and 24 with a maximum gain in peak pressure of 55 per cent at an air—fuel ratio of 20. The local injection of a rich mixture, in addition to increasing the gain in peak pressure from 30 to 50 per cent at an air—fuel ratio of 24, has extended the lean limit of the engine to 29. The timing of ignition relative to the end of injection, which varied as a function of the injection pressure, was found to have a strong effect on the peak combustion pressure so that, for example, a reduction of 8°(CA) in the time between the spark and the end of injection resulted in a 25 per cent reduction in combustion pressure at an air—fuel ratio of 22. The average flame speed was increased by local injection at all equivalence ratios; for example, a value of 7 m/s was obtained with local injection at an equivalence ratio of 0.7 which is equivalent to the flame speed measured with a homogeneous charge at the much higher equivalence ratio of 0.9.

Identification and air-fuel ratio control of a spark ignition engine

1995 ◽  
Vol 3 (1) ◽  
pp. 14-21 ◽  
Author(s):  
V.K. Jones ◽  
B.A. Ault ◽  
G.F. Franklin ◽  
J.D. Powell
Keyword(s):  
Spark Ignition ◽  
Spark Ignition Engine ◽  
Fuel Ratio
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