Comparison of engine power correction factors for varying atmospheric conditions

Sodré, José Ricardo; Soares, S. M.

doi:10.1590/s1678-58782003000300010

Cited by 14 publications

(4 citation statements)

References 8 publications

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“…Correction factors are available to predict the power developed by the engine under distinct ambient conditions from the engine power curve obtained in laboratory tests at a standard condition [22]. But when determining much more power due to the new headers, or the new cam, the corrected power is more useful, since it removes the effects of atmospheric conditions and just shows how much more (or less) power there is than in the previous tests.…”

Section: Dyno Correction Factormentioning

confidence: 99%

Correlation of Performance, Exhaust Gas Temperature and Speed of a Spark Ignition Engine Using Kiva4

Lungu¹,

Siwale²,

Kashinga³

et al. 2021

JPEE

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The objective of this study was to investigate performance characteristics of a spark ignition engine, particularly, the correlation between performance, exhaust gas temperature and speed, using Kiva4. Test data to validate kiva4 simulation results were conducted on a 3-cylinder, four-stroke Volkswagen (VW) Polo 6 TSI 1.2 gasoline engine. Three different tests were, therefore, carried out. In one set, variations in exhaust gas temperature were studied by varying the engine load, while keeping the engine speed constant. In another test, exhaust gas temperature variations were studied by keeping the engine at idling whilst varying the speeds. A third test involved studying variations in exhaust gas temperature under a constant load with variable engine speeds. To study variations in exhaust gas temperatures under test conditions, a basic grid/mesh generator, K3PREP, was employed to write an itape17 file comprising of a 45˚ asymmetrical mesh. This was based on the symmetry of the combustion chamber of the engine used in carrying out experimental tests. Simulations were therefore performed based on the input parameters established in the conducted tests. Simulations with the kiva4 code showed a significant predictability of the performance characteristics of the engine. This was evident in the appreciable agreement obtained in the simulation results when compared with the test data, under the considered test conditions. A percentage error, between experimental results and results from simulations with the kiva4 code of only between 2% to 3% was observed.

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Section: Dyno Correction Factormentioning

confidence: 99%

Correlation of Performance, Exhaust Gas Temperature and Speed of a Spark Ignition Engine Using Kiva4

Lungu¹,

Siwale²,

Kashinga³

et al. 2021

JPEE

View full text Add to dashboard Cite

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“…They found that at the low engine speeds, engine torque decreased as the inlet air pressure decreases. Sodre and Soares (2002Soares ( , 2003 investigated the effects temperature, pressure and humidity on the SI engine experimentally on the vehicle. They proposed power correction correlations and compared to existed standards.…”

Section: Fig 1 Altitude Above Sea Level For Some Iranian Citiesmentioning

confidence: 99%

Effects of Altitude and Temperature on the Performance and Efficiency of Turbocharged Direct Injection Gasoline Engine

Motahari¹,

Chitsaz²

2019

JAFM

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Iran is located at the high altitude region and has a diverse four season climate. The temperature difference of two locations at the same time reaches to 50° C. Therefore, the modern direct injection turbocharged engines are highly affected at this condition. This paper deals with the effects of temperature and pressure variations on the engine performance and fuel consumption of turbocharged gasoline direct injection engine. Ford ecoboost is selected for this study and the base experiments are performed at the sea level. At the next step, a comprehensive one-dimensional model of the engine is constructed in GT power and validated with experimental data. Validated model is implemented to investigate the effects of ambient air variations on the engine performance and fuel consumption. The simulations revealed that low end torque is not highly affected by the temperature increase due to the turbocharging compensation while engine torque is significantly dropped at high engine speeds in the elevated temperatures. At constant air temperature, brake specific fuel consumption is decreased for higher intake pressure up to 3000 rpm and does not change up to 3500 rpm.

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“…Effects of air humidity have been neglected in this equation because their effect is minor compared to that due to the variation in pressure and temperature [7,8].…”

Section: Rc = V·sin()mentioning

confidence: 99%

Use of fuel cell stacks to achieve high altitudes in light unmanned aerial vehicles

Renau

Lozano

Barroso

et al. 2015

International Journal of Hydrogen Energy

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A study is presented to determine if substituting an internal combustion engine (ICE) by an electric motor powered by a fuel cell stack can be a viable option to increase the service ceiling of an available light unmanned aerial vehicle (UAV), extending it to 10,000 m. As a first condition, the stack has to be capable of supplying the minimum power required for horizontal leveled flight at this altitude, which is a function of the UAV total mass. A second step examines if the UAV can transport the energy required to reach the desired service ceiling without exceeding the maximum mass that can be loaded, considering that both hydrogen and oxygen have to be carried on-board. A particularly light PEM fuel cell stack is proposed as a suitable power source. A realistic system is described to store the required amount of reactant gases maintaining the mass below the allowable limits. Results indicate that with its aerodynamic characteristics, the UAV should be capable of ascending up to 10,000 m with the described fuel cell and gas storage system. Some multivariable maps that include service ceiling, total payload and required power are provided to perform this type of analysis.Keywords: PEM fuel cell, Hydrogen, High-temperature, UAV, Aerodynamics * Corresponding author. E-Mail: alozano@litec.csic.es Nomenclature Latin alphabet

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Comparison of engine power correction factors for varying atmospheric conditions

Cited by 14 publications

References 8 publications

Correlation of Performance, Exhaust Gas Temperature and Speed of a Spark Ignition Engine Using Kiva4

Correlation of Performance, Exhaust Gas Temperature and Speed of a Spark Ignition Engine Using Kiva4

Effects of Altitude and Temperature on the Performance and Efficiency of Turbocharged Direct Injection Gasoline Engine

Use of fuel cell stacks to achieve high altitudes in light unmanned aerial vehicles

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