The Experts below are selected from a list of 297 Experts worldwide ranked by ideXlab platform
R. P. Sharma - One of the best experts on this subject based on the ideXlab platform.
-
hydrogen fueled spark ignition engine with electronically controlled Manifold injection an experimental study
Renewable Energy, 2008Co-Authors: Hari R Ganesh, V Subramanian, A. Ramesh, J. M. Mallikarjuna, V Balasubramanian, R. P. SharmaAbstract:In this work, a single cylinder conventional spark ignition engine was converted to operate with hydrogen using the timed Manifold fuel injection technique. A solenoid operated gas injector was used to inject hydrogen into the Inlet Manifold at the specified time. A dedicated electronic circuit developed for this work was used to control the injection timing and duration. The spark timing was set to minimum advance for best torque (MBT). The engine was operated at the wide-open throttle condition. For comparison of results, the same engine was also run on gasoline.
Aamer Iqbal Bhatti - One of the best experts on this subject based on the ideXlab platform.
-
Second order sliding mode observer for estimation of SI engine Volumetric Efficiency & Throttle Discharge Coefficient
2010 11th International Workshop on Variable Structure Systems (VSS), 2010Co-Authors: Qadeer Ahmed, Aamer Iqbal BhattiAbstract:Identification and estimation of non-measurable critical parameters of automotive engine provide significant information to monitor its functions and health. This article proposes a novel estimation scheme of identifying such parameters. Two of the critical parameters are: Volumetric Efficiency and Throttle Discharge Coefficient. These parameters are estimated from the single nonlinear equation of engine Inlet Manifold pressure dynamics. The estimation scheme utilizes second order sliding mode observer based on super twisting algorithm. Mean Value Engine Model is considered to model the Inlet Manifold behavior. The estimation is carried out on production vehicle equipped with engine control unit compliant to OBD-II standards. The proposed observer is simple enough for implementation. The estimated parameters have vast application in the area of engine controller design and fault diagnosis/prognosis.
-
second order sliding mode observer for estimation of si engine volumetric efficiency throttle discharge coefficient
International Workshop on Variable Structure Systems, 2010Co-Authors: Qadeer Ahmed, Aamer Iqbal BhattiAbstract:Identification and estimation of non-measurable critical parameters of automotive engine provide significant information to monitor its functions and health. This article proposes a novel estimation scheme of identifying such parameters. Two of the critical parameters are: Volumetric Efficiency and Throttle Discharge Coefficient. These parameters are estimated from the single nonlinear equation of engine Inlet Manifold pressure dynamics. The estimation scheme utilizes second order sliding mode observer based on super twisting algorithm. Mean Value Engine Model is considered to model the Inlet Manifold behavior. The estimation is carried out on production vehicle equipped with engine control unit compliant to OBD-II standards. The proposed observer is simple enough for implementation. The estimated parameters have vast application in the area of engine controller design and fault diagnosis/prognosis.
-
A nonlinear observer for PEM fuel cell system
2009 IEEE 13th International Multitopic Conference, 2009Co-Authors: I. H. Kazmi, Aamer Iqbal Bhatti, S. IqbalAbstract:In this paper, a model-based robust observer is designed for the estimation of oxidizer mass flow rate of fuel cell system (FCS). The mass flow rates of reactant gases play a pivotal role in the reliable and efficient operation of FCS. Their precise and exact estimation is necessary and important for control and diagnostics of FCS. In the particular sense of Inlet Manifold of fuel cell system, appropriate air mass flow is very critical for proper maintenance of chemical reactions in the cathode and anode chambers. In the model, air mass flow rate is calculated by the product of proportionality parameter with pressure difference at up/down streams of air Inlet Manifold using linearized nozzle flow equation. The proportionality parameter is generally measured through extensive experimentations on the system by developing relationship between mass flow rate and pressure difference. The sliding mode techniques are employed for the design of observer to estimate the proportionality parameter. The estimates are quite similar to nominal values. The simulation results show robustness and fast convergence of observer estimates to nominal value of the parameter. The observer can replace the mass flow sensor which results in rid of expensive and hard instrumentation for measurement of mass flow rate.
Hari R Ganesh - One of the best experts on this subject based on the ideXlab platform.
-
hydrogen fueled spark ignition engine with electronically controlled Manifold injection an experimental study
Renewable Energy, 2008Co-Authors: Hari R Ganesh, V Subramanian, A. Ramesh, J. M. Mallikarjuna, V Balasubramanian, R. P. SharmaAbstract:In this work, a single cylinder conventional spark ignition engine was converted to operate with hydrogen using the timed Manifold fuel injection technique. A solenoid operated gas injector was used to inject hydrogen into the Inlet Manifold at the specified time. A dedicated electronic circuit developed for this work was used to control the injection timing and duration. The spark timing was set to minimum advance for best torque (MBT). The engine was operated at the wide-open throttle condition. For comparison of results, the same engine was also run on gasoline.
M Ghazikhani - One of the best experts on this subject based on the ideXlab platform.
-
an experimental study on the effects of different opening ranges of waste gate on the exhaust soot emission of a turbo charged di diesel engine
Energy Conversion and Management, 2008Co-Authors: M Ghazikhani, M Davarpanah, S Mousavi A ShaeghAbstract:This experimental study was conducted to investigate the effects of different opening ranges of waste-gate of a turbo-charged DI diesel engine on improving the exhaust soot emission. Different opening ranges of waste-gate were supplied using an adjustable spring to load the actuating rod of the waste-gate in which, increasing the opening range of the waste-gate decreases the Inlet Manifold pressure. In this study, the maximum Inlet Manifold pressures which were supplied by changing the opening range of waste-gate were 0.1 bar, 0.23 bar, 0.26 bar and 0.52 bar over atmosphere and experiments were conducted under the ECE-R49, 13 mode standard test. At each mode of the test, soot emission was recorded and then brake specific soot emission was calculated. Results indicate that, soot emission decreases with increasing the maximum Inlet Manifold pressure from 0.1 bar to 0.23 bar. This reduction may be due to increasing the intake-air temperature which results in reduction of ignition delay that prolongs the late combustion phase. This improves the soot burnout process because enough time and sufficient in-cylinder temperature are available at the late combustion phase prior to exhaust valve opening. While for the higher maximum Inlet Manifold pressures from 0.23 bar to 0.52 bar, although there are enough time at the late combustion phase, but the soot emission increases which could be due to more reduction of the in-cylinder gas temperature at the end of combustion before EVO.
-
THE INVESTIGATION OF WASTE GATE OPENING ON SOOT EMISSION IN TURBOCHARGED DIESEL ENGINES
2007Co-Authors: M Ghazikhani, M Davarpanah, A AshrafAbstract:The aim of this project is to find a practical way to reduce soot by investigation in different waste gate opening in Diesel engine .Combustion in Diesel engines produce soot. Soot produces in diesel engine because of insufficient air in combustion process. In this project different waste gate control operations are investigated. The OM314 turbocharged diesel engine was tested in ECE-R49 standard test in three waste gate operations. The results shows that, at W.G operation No.2 which controls the maximum Inlet Manifold pressure gage at 0.23bar, specific soot emission reduces 17% in comparison with the period of operation No.1, which controls the maximum Inlet Manifold gage pressure at 0.26bar, and reduce 21% of specific soot emission in comparison with the period of operation No.3, which control the Inlet gage pressure at 0.52bar. This result shows that maximum Inlet Manifold pressure has a large sensitivity against soot emission. This would be better to control by an ECU.
S Mousavi A Shaegh - One of the best experts on this subject based on the ideXlab platform.
-
an experimental study on the effects of different opening ranges of waste gate on the exhaust soot emission of a turbo charged di diesel engine
Energy Conversion and Management, 2008Co-Authors: M Ghazikhani, M Davarpanah, S Mousavi A ShaeghAbstract:This experimental study was conducted to investigate the effects of different opening ranges of waste-gate of a turbo-charged DI diesel engine on improving the exhaust soot emission. Different opening ranges of waste-gate were supplied using an adjustable spring to load the actuating rod of the waste-gate in which, increasing the opening range of the waste-gate decreases the Inlet Manifold pressure. In this study, the maximum Inlet Manifold pressures which were supplied by changing the opening range of waste-gate were 0.1 bar, 0.23 bar, 0.26 bar and 0.52 bar over atmosphere and experiments were conducted under the ECE-R49, 13 mode standard test. At each mode of the test, soot emission was recorded and then brake specific soot emission was calculated. Results indicate that, soot emission decreases with increasing the maximum Inlet Manifold pressure from 0.1 bar to 0.23 bar. This reduction may be due to increasing the intake-air temperature which results in reduction of ignition delay that prolongs the late combustion phase. This improves the soot burnout process because enough time and sufficient in-cylinder temperature are available at the late combustion phase prior to exhaust valve opening. While for the higher maximum Inlet Manifold pressures from 0.23 bar to 0.52 bar, although there are enough time at the late combustion phase, but the soot emission increases which could be due to more reduction of the in-cylinder gas temperature at the end of combustion before EVO.