A Novel Mechanism for Piston Deactivation Improving the Part Load Performances of Multi Cylinder Engines

Boretti, Alberto; Scalzo, Joseph

doi:10.1007/978-3-642-33841-0_1

Cited by 10 publications

(5 citation statements)

References 18 publications

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“…Disconnection of several engine cylinders is advisable when the car (tractor) moves in the transport mode with a small load along a horizontal supporting surface (a road with asphalt concrete or improved surfacing), as well as downhill [30][31][32].…”

Section: Theoretical Researchmentioning

confidence: 99%

Increase in the Fuel Efficiency of a Diesel Engine by Disconnecting Some of Its Cylinders

Gritsenko,

Shepelev,

Fedoseev

et al. 2023

FU Mech Eng

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In fuel economy, a rising level of interest in heavy duty diesel engines that industry has witnessed over the last few years continues to go up and this is not likely to change. Lowering the fuel consumption of all internal combustion engines remains a priority for years to come, driven by economic, legislative, and environmental reasons. According to statistics, the share of operating expenses to ensure transport operations in industrial production is 15-20%, wherein 16-30% of the total volume of transport operations concerns a car, tractor, and trailer. During transport operations, the engine load by the torque, in most cases, does not exceed 40-50%. The paper investigates the increase in fuel efficiency of cars and tractors by disconnecting some of the engine cylinders operated in low-load and idling modes. The research has led to the establishment of the theoretical dependencies between the effective power, engine efficiency, mass of the transported cargo, speed of the car (tractor) and the number of disconnected engine cylinders. Results of experiments suggest the interdependencies of the performance parameters of the car (tractor) when disconnecting some of the engine cylinders. It has also been established that the maximum reduction in the hourly fuel consumption occurs in the idling mode while it decreases along with an increase in the load.

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Section: Theoretical Researchmentioning

confidence: 99%

Increase in the Fuel Efficiency of a Diesel Engine by Disconnecting Some of Its Cylinders

Gritsenko,

Shepelev,

Fedoseev

et al. 2023

FU Mech Eng

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“…To satisfy the regulations, various technologies have been and are continuing to be developed. Variable valve actuation (VVA), [3][4][5] externally cooled exhaust gas recirculation (EGR), [6][7][8][9] and cylinder deactivation (CDA) [10][11][12] are examples of such technologies.…”

Section: Introductionmentioning

confidence: 99%

Development of a zero-dimensional turbulence model for a spark ignition engine

Kim

Min

2018

International Journal of Engine Research

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The necessity for the use of one-dimensional simulation is growing because cost and time required for hardware optimization and optimal calibration of engines based on experiment are increasing dramatically as engines are equipped with growing numbers of technologies. For one-dimensional simulation results to be more reliable, the accuracy and applicability of the combustion model of a one-dimensional simulation tool must be guaranteed. Because the combustion process in a spark ignition engine is driven by the turbulence, many of existing models focus on the prediction of mean turbulence intensity. Although many successes in the previous models can be found, the previous models contain a large number of adjustable constants or require information supplemented from three-dimensional computational fluid dynamics simulation results. For improved applicability of a model, the number of adjustable constants and inputs to the model must be kept as small as possible. Thus, in this study, a new zero-dimensional (0D) turbulence model was proposed that requires information on the basic characteristics of the engine geometry and has only one adjustable constant. The model was developed based on the energy cascade model with additional consideration of following aspects: loss of kinetic energy during the intake stroke, the effect of piston motion during the compression and the expansion stroke, modifications to correlations for integral length scale, geometric length scale, and production rate of turbulent kinetic energy. An adjustable constant to consider engine design which determines tumble strength was also introduced. The comparison of the simulation results with those of three-dimensional computational fluid dynamics confirmed that the developed model can predict the mean turbulence intensity without case-dependent adjustment of the model constant.

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“…Hence, in order to supply required work with only half the cylinders, each cylinder needs more air and fuel than it would with all cylinders firing [2]. Therefore, the intake manifold pressure must be higher (less throttled), which seriously reduce the pumping work of the engine [3].…”

Section: Introductionmentioning

confidence: 99%

Investigation of Intake Valve Strategy on the Cylinder Deactivation Engine

Said

Latiff

Abidin

et al. 2016

AMM

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There are many technologies that being developed to increase the efficiency of internal combustion engines as well as reducing their fuel consumption. In this paper, the main research area is focus on cylinder deactivation (CDA) technology. CDA mostly being applied on multi cylinders engines. CDA has the advantage in improving fuel consumption by reducing pumping losses at part load engine conditions. Here, the application of CDA on 1.6L four cylinders gasoline engine was studied. One-dimensional (1D) engine modeling is performed to investigate the effect of intake valve strategy on engine performance with CDA. 1D engine model is constructed according to the 1.6L actual engine geometries. The model is simulated at various engine speeds at full load conditions. The simulated results show that the constructed model is well correlated to measured data. This correlated model used to investigate the CDA application at part load conditions. Also, the effects on the in-cylinder combustion as well as pumping losses are presented. The study shows that the effect of intake valve strategy is very significant on engine performance. Pumping losses is found to be reduced, thus improving fuel consumption and engine efficiency.

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A Novel Mechanism for Piston Deactivation Improving the Part Load Performances of Multi Cylinder Engines

Cited by 10 publications

References 18 publications

Increase in the Fuel Efficiency of a Diesel Engine by Disconnecting Some of Its Cylinders

Increase in the Fuel Efficiency of a Diesel Engine by Disconnecting Some of Its Cylinders

Development of a zero-dimensional turbulence model for a spark ignition engine

Investigation of Intake Valve Strategy on the Cylinder Deactivation Engine

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