The Experts below are selected from a list of 312 Experts worldwide ranked by ideXlab platform
J.w. Grizzle - One of the best experts on this subject based on the ideXlab platform.
-
From stoichiometry to ultra lean burn in a direct injection spark Ignition Engine model
Proceedings of the 2002 American Control Conference (IEEE Cat. No.CH37301), 2002Co-Authors: J.j. Scillieri, J.s. Freudenberg, J.w. GrizzleAbstract:In an internal combustion Engine, whenever complete combustion can be achieved, indicated torque production is directly related to fuel rate. This premise is exploited to extrapolate a public-domain, homogeneous charge, spark Ignition Engine model to the stratified charge regime. The extrapolation is based on published, functional forms for indicated torque and friction torque in a direct-injection, spark Ignition Engine. The extrapolated, control-oriented model is "validated" through comparisons to both published results and expected behaviors. The dynamic model is illustrated through step responses in fuel and throttle flow rate.
-
Modeling and control of a spark Ignition Engine with variable cam timing
Proceedings of 1995 American Control Conference - ACC'95, 1995Co-Authors: A.g. Stefanopoulou, J.s. Freudenberg, J.w. Grizzle, J.a. Cook, M. Haghgooie, P.s. SzpakAbstract:A control scheme is designed to minimize emissions and respond to rapid throttle changes in a fuel injected, spark Ignition Engine equipped with variable cam timing. The model is derived from Engine mapping data for an eight cylinder experimental Engine mounted in a dynamometer test cell; it is fundamentally a nonlinear and multivariable model. The control scheme jointly manages fuel and cam position.
G Abd H Alla - One of the best experts on this subject based on the ideXlab platform.
-
computer simulation of a four stroke spark Ignition Engine
Energy Conversion and Management, 2002Co-Authors: G Abd H AllaAbstract:Abstract This paper introduces the preliminary simulation of a four stroke spark Ignition Engine. An arbitrary heat release formula was used to predict the cylinder pressure, which was used to find 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. Most of the parameters that can affect the performance of four stroke spark Ignition Engines, such as equivalence ratio, spark timing, heat release rate, compression ratio, compression index and expansion index are studied. The use of a real combustion curve has a profound influence on the similarity of the pressure–volume profile to that seen for the real Engine. The modeling process is obviously getting closer to reality and is now worth pursuing as a design aid.
J.s. Freudenberg - One of the best experts on this subject based on the ideXlab platform.
-
From stoichiometry to ultra lean burn in a direct injection spark Ignition Engine model
Proceedings of the 2002 American Control Conference (IEEE Cat. No.CH37301), 2002Co-Authors: J.j. Scillieri, J.s. Freudenberg, J.w. GrizzleAbstract:In an internal combustion Engine, whenever complete combustion can be achieved, indicated torque production is directly related to fuel rate. This premise is exploited to extrapolate a public-domain, homogeneous charge, spark Ignition Engine model to the stratified charge regime. The extrapolation is based on published, functional forms for indicated torque and friction torque in a direct-injection, spark Ignition Engine. The extrapolated, control-oriented model is "validated" through comparisons to both published results and expected behaviors. The dynamic model is illustrated through step responses in fuel and throttle flow rate.
-
Modeling and control of a spark Ignition Engine with variable cam timing
Proceedings of 1995 American Control Conference - ACC'95, 1995Co-Authors: A.g. Stefanopoulou, J.s. Freudenberg, J.w. Grizzle, J.a. Cook, M. Haghgooie, P.s. SzpakAbstract:A control scheme is designed to minimize emissions and respond to rapid throttle changes in a fuel injected, spark Ignition Engine equipped with variable cam timing. The model is derived from Engine mapping data for an eight cylinder experimental Engine mounted in a dynamometer test cell; it is fundamentally a nonlinear and multivariable model. The control scheme jointly manages fuel and cam position.
Bilge Albayrak Çeper - One of the best experts on this subject based on the ideXlab platform.
-
Investigation of combustion characteristics and emissions in a spark-Ignition Engine fuelled with natural gas–hydrogen blends
International Journal of Hydrogen Energy, 2020Co-Authors: Nafiz Kahraman, S. Orhan Akansu, Bilge Albayrak Çeper, Kadir AydinAbstract:Abstract In this study, an experimental study on the performance and exhaust emissions of a spark-Ignition Engine fuelled with methane–hydrogen mixtures (100% CH4, 10% H2 + 90% CH4, 20% H2 + 80% CH4, and 30% H2 + 70% CH4) were performed at different Engine speeds and different excessive air ratios. This present work was carried out on a Ford Engine. This is a four-stroke cycle four-cylinder spark-Ignition Engine with a bore of 80.6 mm, a stroke of 88 mm and a compression ratio of 10:1. Experiments were performed at 1500, 2000, 2500 and 3000 rpm and at wide open throttle (WOT). CO, CO2 and HC emission values and cylinder pressure were measured. The results showed that while the speed and excessive air ratio increase, CO emission values decrease. The reduction of HC and CO emissions could be obtained by adding hydrogen into the natural gas when operating on the lean mixture condition. Increasing the excessive air ratio also decreases the maximum peak cylinder pressure.
-
investigation of combustion characteristics and emissions in a spark Ignition Engine fuelled with natural gas hydrogen blends
International Journal of Hydrogen Energy, 2009Co-Authors: Nafiz Kahraman, Orhan S Akansu, Bilge Albayrak Çeper, Kadir AydinAbstract:Abstract In this study, an experimental study on the performance and exhaust emissions of a spark-Ignition Engine fuelled with methane–hydrogen mixtures (100% CH4, 10% H2 + 90% CH4, 20% H2 + 80% CH4, and 30% H2 + 70% CH4) were performed at different Engine speeds and different excessive air ratios. This present work was carried out on a Ford Engine. This is a four-stroke cycle four-cylinder spark-Ignition Engine with a bore of 80.6 mm, a stroke of 88 mm and a compression ratio of 10:1. Experiments were performed at 1500, 2000, 2500 and 3000 rpm and at wide open throttle (WOT). CO, CO2 and HC emission values and cylinder pressure were measured. The results showed that while the speed and excessive air ratio increase, CO emission values decrease. The reduction of HC and CO emissions could be obtained by adding hydrogen into the natural gas when operating on the lean mixture condition. Increasing the excessive air ratio also decreases the maximum peak cylinder pressure.
-
experimental study on a spark Ignition Engine fuelled by methane hydrogen mixtures
International Journal of Hydrogen Energy, 2007Co-Authors: Orhan S Akansu, Nafiz Kahraman, Bilge Albayrak ÇeperAbstract:Abstract In this study, effects on a spark Ignition Engine of mixtures of hydrogen and methane have been experimentally considered. This article presents the results of a four-cylinder Engine test with mixtures of hydrogen in methane of 0, 10, 20 and 30% by volume. Experiments have been made varying the equivalence ratio. Equivalence ratios have been selected from 0.6 to 1.2. Each fuel has been investigated at 2000 rpm and constant load conditions. The result shows that NO emissions increase, HC, CO and CO 2 emission values decrease and brake thermal efficiency (BTE) values increase with increasing hydrogen percentage.
Nafiz Kahraman - One of the best experts on this subject based on the ideXlab platform.
-
Investigation of combustion characteristics and emissions in a spark-Ignition Engine fuelled with natural gas–hydrogen blends
International Journal of Hydrogen Energy, 2020Co-Authors: Nafiz Kahraman, S. Orhan Akansu, Bilge Albayrak Çeper, Kadir AydinAbstract:Abstract In this study, an experimental study on the performance and exhaust emissions of a spark-Ignition Engine fuelled with methane–hydrogen mixtures (100% CH4, 10% H2 + 90% CH4, 20% H2 + 80% CH4, and 30% H2 + 70% CH4) were performed at different Engine speeds and different excessive air ratios. This present work was carried out on a Ford Engine. This is a four-stroke cycle four-cylinder spark-Ignition Engine with a bore of 80.6 mm, a stroke of 88 mm and a compression ratio of 10:1. Experiments were performed at 1500, 2000, 2500 and 3000 rpm and at wide open throttle (WOT). CO, CO2 and HC emission values and cylinder pressure were measured. The results showed that while the speed and excessive air ratio increase, CO emission values decrease. The reduction of HC and CO emissions could be obtained by adding hydrogen into the natural gas when operating on the lean mixture condition. Increasing the excessive air ratio also decreases the maximum peak cylinder pressure.
-
investigation of combustion characteristics and emissions in a spark Ignition Engine fuelled with natural gas hydrogen blends
International Journal of Hydrogen Energy, 2009Co-Authors: Nafiz Kahraman, Orhan S Akansu, Bilge Albayrak Çeper, Kadir AydinAbstract:Abstract In this study, an experimental study on the performance and exhaust emissions of a spark-Ignition Engine fuelled with methane–hydrogen mixtures (100% CH4, 10% H2 + 90% CH4, 20% H2 + 80% CH4, and 30% H2 + 70% CH4) were performed at different Engine speeds and different excessive air ratios. This present work was carried out on a Ford Engine. This is a four-stroke cycle four-cylinder spark-Ignition Engine with a bore of 80.6 mm, a stroke of 88 mm and a compression ratio of 10:1. Experiments were performed at 1500, 2000, 2500 and 3000 rpm and at wide open throttle (WOT). CO, CO2 and HC emission values and cylinder pressure were measured. The results showed that while the speed and excessive air ratio increase, CO emission values decrease. The reduction of HC and CO emissions could be obtained by adding hydrogen into the natural gas when operating on the lean mixture condition. Increasing the excessive air ratio also decreases the maximum peak cylinder pressure.
-
experimental study on a spark Ignition Engine fuelled by methane hydrogen mixtures
International Journal of Hydrogen Energy, 2007Co-Authors: Orhan S Akansu, Nafiz Kahraman, Bilge Albayrak ÇeperAbstract:Abstract In this study, effects on a spark Ignition Engine of mixtures of hydrogen and methane have been experimentally considered. This article presents the results of a four-cylinder Engine test with mixtures of hydrogen in methane of 0, 10, 20 and 30% by volume. Experiments have been made varying the equivalence ratio. Equivalence ratios have been selected from 0.6 to 1.2. Each fuel has been investigated at 2000 rpm and constant load conditions. The result shows that NO emissions increase, HC, CO and CO 2 emission values decrease and brake thermal efficiency (BTE) values increase with increasing hydrogen percentage.
