Results 201 to 210 of about 105,197 (248)
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Heat Transfer in a Piston of a Four Stroke Diesel Engine
SAE Technical Paper Series, 1976A design tool for analyzing heat flow rates through pistons is presented. Tests on a Petter PJIW engine were carried out over a range of conditions covering different fuel inputs, speeds, boost pressures and intake temperatures. The calculated mean heat transfer rates through the piston tend to support the trends suggested by Annand's semi-analytical ...
M. Ramchandani, N. D. Whitehouse
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Computer simulation of a four stroke spark ignition engine
Energy Conversion and Management, 2001Abstract 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
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Development of Ports of Four Stroke Diesel Engines
2019Fresh air is breathed in and products of combustion are exhaled by the inlet and exhaust ports. The efficiency of air flow is given by the flow coefficient. The flow is turbulent for most of the period and avoiding recirculation zones improves the flow.
Nagaraj S. Nayak, P. A. Lakshminarayanan
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Gas and Gas Diesel Four-Stroke Marine Engines
2020According to Lloyd’s Marine Intelligence experts, the world merchant fleet as for 2018 has more than 50,000 vessels with a total carrying capacity of about 1.4 billion tons, which carry about 75% of the goods, transported all over the world. The part of harmful emissions from ship power plants into the atmosphere is relatively not high and does not ...
Ievgen Bilousov +2 more
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Regenerative Supercharging of Four Stroke Internal Combustion Engines
SAE Technical Paper Series, 1983A regenerative supercharging method has been studied and shows an improvement in four stroke engine performance. With this method the mechanical or pneumatic connection between the engine and the supercharge is removed and replaced by a thermal connection. The heat from the engine is converted into compression work by means of a suitable R.S. cycle and
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Total Engine Friction in Four Stroke S.I. Motorcycle Engine
SAE Technical Paper Series, 1988Many papers are written on the frictional loss of each component in an engine, such as piston, crankshaft or bearings, but few papers describe on the total engine friction in detail. In this paper, the total engine friction is analyzed using the engine friction data of 145 HONDA mass produced motorcycle in-line engines, including single-, 2- and 4 ...
Hiroshi Sono +3 more
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Measurements in a Motored Four-Stroke Reciprocating Model Engine
Journal of Fluids Engineering, 1982Measurements of ensemble-averaged axial and swirl velocities and the rms of the corresponding fluctuations obtained by laser-Doppler anemometry, are reported for the axisymmetric swirling flow in a four-stroke model engine motored at 200 rpm with a compression ratio of 3.5.
A. F. Bicen +2 more
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Common Rail Injection for Marine Four-Stroke Engines
Design, Application, Performance and Emissions of Modern Internal Combustion Engine Systems and Components, 2002Common rail injection is not a new idea. For example Sulzer was running tests with a mechanical common rail system as early as 1915. Also the idea of an electronically controlled injection system is more than three decades old. At the moment common rail injection is state of the art for trucks and diesel passenger cars.
Daniel Paro, Dave Jay
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Release Process in a Four‐Stroke Engine
Aircraft Engineering and Aerospace Technology, 1947THE problem of silencing the exhaust of a piston engine requires that attention be given to the two main sources of gas noise; firstly, relatively low frequency vibrations in the exhaust column itself, excited by a pressure pulse produced by the rapid rush of gas from the cylinder into the exhaust pipe, and, secondly, high frequency vibrations ...
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Flame and Turbulence Interactions in a Four-Stroke SI Engine
1996Flame and turbulence interactions have been examined in a four-stroke spark ignition engine, which was fuelled with propane with a nominal equivalence ratio of 0.9 and operated at 1000 rpm. The flame development was visualised with an intensified CCD camera and gas velocities in the combustion chamber were measured by laser Doppler velocimetry.
H. M. Xu, J. H. Whitelaw
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