First Experimental Analysis Of An Internal Combustion Engine With Variable Stroke And Compression Ratio

Abenavoli, R.I.; Naso, Vincenzo; Rychter, T.; Teodorczyk, A.

doi:10.1109/iecec.1990.716569

Cited by 4 publications

(3 citation statements)

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“…Further, Filipi et al [10] theoretically investigated the effect of varying the stroke length on a homogeneouscharge engine's combustion, heat transfer and efficiency using gasoline as fuel. Similar studies on the effect of bore-to-stroke ratio on engine performance were also done by Abenavoli et al [11,12] . All of them used gasoline in their work.…”

Section: Introductionsupporting

confidence: 67%

Environmental Assessment of a Diesel Engine Under Variable Stroke Length and Constant Compression Ratio

Yamin¹,

Abu-Nameh²

2007

American J. of Applied Sciences

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In the light of the energy crisis and the stringent environmental regulations, diesel engines are offering good hope for automotive vehicles. However, lot of work is needed to reduce the diesel exhaust emissions and give the way for full utilization of the diesel fuels excellent characteristics. This paper presents a theoretical study on the effect of variable stroke length technique on the emissions of a four-stroke, water-cooled direct injections diesel engine with the help of experimentally verified computer software designed mainly for diesel engines. The emission levels were studied over the speed range (1000 rpm to 3000 rpm) and stroke lengths (120 mm to 200 rpm) and were compared with those of the original engine design. The simulation results clearly indicate the advantages and utility of variable stroke technique in the reduction of the exhaust emission levels. A reduction of about 10% to 75% was achieved for specific particulate matter over the entire speed range and bore-to-stroke ratio studied. Further, a reduction of about 10% to 59% was achieved for the same range. As for carbon dioxide, a reduction of 0% to 37% was achieved. On the other hand, a less percent change was achieved for the case of nitrogen dioxide and nitrogen oxides as indicated by the results. This study clearly shows the advantage of VSE over fixed stroke engines. This study showed that the variable stroke technique proved a good way to curb the diesel exhaust emissions and hence helped making these engines more environmentally friendly

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Section: Introductionsupporting

confidence: 67%

Environmental Assessment of a Diesel Engine Under Variable Stroke Length and Constant Compression Ratio

Yamin¹,

Abu-Nameh²

2007

American J. of Applied Sciences

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“…However, it is limited by two considerations: material strength due to maximum stress at certain pressure and engine knock due to the maximum temperature during process exceeds autoignition temperature. There is some research on variable compression ratio system which changes geometries of combustion chambers [4,5,[19][20][21].…”

Section: Compression Ratiomentioning

confidence: 99%

Comparison of Engine Simulation Software for Development of Control System

Chan

Ordys

Волков

et al. 2013

Modelling and Simulation in Engineering

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Most commonly used commercial engine simulation packages generate detailed estimation of the combustion and gas flow parameters. These parameters are required for advanced research on fluid flow and heat transfer and development of geometries of engine components. However, engine control involves different operating parameters. Various sensors are installed into the engine, the combustion performance is recorded, and data is sent to engine control unit (ECU). ECU computes the new set of parameters to make fine adjustments to actuators providing better engine performance. Such techniques include variable valve timing, variable ignition timing, variable air to fuel ratio, and variable compression ratio. In the present study, two of the commercial packages, Ricardo Wave and Lotus Engine Simulation, have been tested on the capabilities for engine control purposes. These packages are compared with an in-house developed package and with reference results available from the literature. Different numerical experiments have been carried out from which it can be concluded that all packages predict similar profiles of pressure and temperature in the engine cylinder. Moreover, those are in reasonable agreement with the reference results while in-house developed package is possible to run simulations with changing speed for engine control purpose.

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“…The flexibility of the ICEs will be increased significantly if variable compression ratio control can be achieved during the engine operation. Different variable compression ratio mechanisms have been proposed before [1][2][3]. Most proposals modified the crank/connecting rod mechanism with mechanical linkages and an actuation system.…”

Section: Introductionmentioning

confidence: 99%

Motion control of a hydraulic free-piston engine

Sadighi

Sun

2012

2012 American Control Conference (ACC)

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Free-piston engine (FPE), as an alternative of the conventional internal combustion engine, has a high potential in terms of energy saving given its wide range of potential applications and high efficiency. One of the technical barriers that prevents the wide spread of this technology is the lack of precise piston motion control. This paper presents a novel strategy on the motion control of a hydraulic FPE. A robust repetitive controller is designed and implemented to form a virtual crankshaft that would provide a precise and stable engine operation. Based on the controller, a hardware-in-theloop (HIL) environment that integrates the combustion chamber dynamics with the hydraulic system is developed to further validate the proposed control design. The experimental data of engine motoring tests with virtual crankshaft control demonstrates the effectiveness of the proposed approach.

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First Experimental Analysis Of An Internal Combustion Engine With Variable Stroke And Compression Ratio

Cited by 4 publications

References 1 publication

Environmental Assessment of a Diesel Engine Under Variable Stroke Length and Constant Compression Ratio

Environmental Assessment of a Diesel Engine Under Variable Stroke Length and Constant Compression Ratio

Comparison of Engine Simulation Software for Development of Control System

Motion control of a hydraulic free-piston engine

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