A New Design to Achieve Variable Compression Ratio in a Spark Ignition Engine

Roy, Anjana; Mishra, Chetan; Jain, Sarthak; Solanki, Naveen

doi:10.1007/978-981-13-2718-6_37

Cited by 2 publications

(2 citation statements)

References 6 publications

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“…The VCR strategy can be realized through [47,56]:  articulated monohead (Saab)  piston of variable deck height (Daimler-Benz)  eccentrics on crankshaft bearings (FEV)  multilink rod-crank mechanisms (Nissan)  secondary moving piston or valve in cylinder head (Ford)  gear-based crank mechanisms (MCE-5)  precisely shifted cylinder block with cylinder head assembly (Self-Developed Design). Some realizations of VCR strategy include moveable cylinder block [14,55], use of eccentric bearings for crankshaft and connecting rod and use of adjustable lever rod between crankshaft and connecting rod [8, 11, 22, 25, 33-35, 42, 43, 45, 50].…”

Section: The Vcr Strategy Realizationmentioning

confidence: 99%

Study on selected parameters of engine with the active combustion chamber

Głogowski¹,

Woźniak²,

Szydłowski³

et al. 2023

Combustion Engines

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The present study was focused on the combustion engine with a variable compression ratio (VCR), namely the four-stroke air-cooled engine with the active combustion chamber (ACC). An indicated pressure, torque, power, and specific fuel consumption of that engine were investigated experimentally as a goal of the present study. Experiments were conducted using two versions of an engine. Two parameters particularly influencing the ACC engine performance including the maximum compression ratio CRmax and the indicator γfm determining the correct operation of the ACC system, were described. It was found that the ACC engine allowed avoiding detonation combustion without changing the amount and composition of the combustible mixture, and even without delaying the ignition advance angle. In addition, the possible range of control of the combustion process allowed the ACC engine to operate with different types of hydrocarbon fuels, for example, in the form of petrol with various alcohol admixtures . The very intense flow of the combustible mixture inside the cylinder of the ACC engine allowed describing the combustion in the ACC engine with zero-dimensional mathematical models with the dual Vibe function providing the proper characterization of the heat release process. The use of very high maximum compression ratios allows the ACC engine to operate to a certain extent as a Homogeneous Charge Compression Ignition (HCCI) engine with high lambda coefficients.

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Section: The Vcr Strategy Realizationmentioning

confidence: 99%

Study on selected parameters of engine with the active combustion chamber

Głogowski¹,

Woźniak²,

Szydłowski³

et al. 2023

Combustion Engines

View full text Add to dashboard Cite

show abstract

“…The struggle between these developing lines is leading to increased efforts for enhancing ICE performance to radically reduce the impact on our environment. To name but the most relevant: increasing the compression ratio, 1 lean combustion concepts 2–4 or new fuels/additives. 5,6…”

Section: Introductionmentioning

confidence: 99%

A one-dimensional modeling study on the effect of advanced insulation coatings on internal combustion engine efficiency

Broatch

Olmeda

Margot

et al. 2020

International Journal of Engine Research

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This article presents a study of the impact on engine efficiency of the heat loss reduction due to in-cylinder coating insulation. A numerical methodology based on one-dimensional heat transfer model is developed. Since there is no analytic solution for engines, the one-dimensional model was validated with the results of a simple “equivalent” problem, and then applied to different engine boundary conditions. Later on, the analysis of the effect of different coating properties on the heat transfer using the simplified one-dimensional heat transfer model is performed. After that, the model is coupled with a complete virtual engine that includes both thermodynamic and thermal modeling. Next, the thermal flows across the cylinder parts coated with the insulation material (piston and cylinder head) are predicted and the effect of the coating on engine indicated efficiency is analyzed in detail. The results show the gain limits, in terms of engine efficiency, that may be obtained with advanced coating solutions.

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A New Design to Achieve Variable Compression Ratio in a Spark Ignition Engine

Cited by 2 publications

References 6 publications

Study on selected parameters of engine with the active combustion chamber

Study on selected parameters of engine with the active combustion chamber

A one-dimensional modeling study on the effect of advanced insulation coatings on internal combustion engine efficiency

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