Maximizing Volumetric Efficiency of IC Engine through Intake Manifold Tuning

Malkhede, Dileep; Khalane, Hemant

doi:10.4271/2015-01-1738

Cited by 18 publications

(5 citation statements)

References 6 publications

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“…In conclusion, the numerical predictions prove the efficacy of the studied sizing technique used for determine the variable intake manifold design. Furthermore, it is apparent that previous simulation results was in agreement with literature findings 34–35 with regard to the effect of pressure wave propagation during intake valve closing phase on volumetric efficiency enhancement.…”

Section: Determination Of Optimized Intake Line Lengthssupporting

confidence: 90%

Variable intake manifold geometry influence on volumetric efficiency enhancement at gaseous engine starting speeds

Jemni

Hadjkacem

Ammar

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part E:

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This paper studied the effect of variable intake length manifold on filling and volumetric efficiency at starting engine speeds using numerical and experimental process. The investigation is based on acoustic supercharging phenomenon. For this purpose, 1-D engine gas-flow model was developed and optimum intake lengths for several low engine speeds were determined using acoustic theory based-resolution. Using the method of characteristics, pressure waves were predicted at the end of intake line length (intake valve level) in order to test the dynamic inertial supercharging phenomena. The quarter-wave resonator technique was taken into consideration to explore the inlet pressure pulsations. Simulations of pressure wave propagation were achieved during intake stroke and intake valve closed phase. Simulation predictions confirmed the analytically calculated optimum intake length. Numerical investigations were carried out on five in-cylinder flow moving through intake system; air, air-gasoline, air-LPG, air-H2 and air-LPG-H2 blend. The percentages of supplied hydrogen with LPG were 0%, 5%, 10%, 15% and 20% in volume. To experimentally validate the analytical founded lengths, an instrumented cold-flow four cylinder Ford SI engine test bench was prepared. Flow through variable intake length manifold was analyzed. Geometry variation was performed on the plenum length. Three engine low speeds are tested; 500 rpm, 750 rpm and 1000 rpm. The experiment results showed an in-cylinder velocity increase by about 60%, 58% and 48% using the optimal intake length at 500 rpm, 750 rpm and 1000 rpm respectively. Furthermore, the collected data proves that varying intake pipe length continuously with the engine speed leads to an average of 39.7% improvement in volumetric efficiency from the original engine configuration at 1000 rpm.

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Section: Determination Of Optimized Intake Line Lengthssupporting

confidence: 90%

Variable intake manifold geometry influence on volumetric efficiency enhancement at gaseous engine starting speeds

Jemni

Hadjkacem

Ammar

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part E:

View full text Add to dashboard Cite

show abstract

“…The speed-dependent filling therefore has a maximum and decreases at both low and high speed. The position of the maximum depends on design choices and in particular on the geometry of the nozzles [27,30]. According to the studies, the filling rate evolves in a range of about 0.1 to 0.3 points and the corresponding maximum speed varies from 1250 to 4000 rpm [5,12,29,30].…”

Section: Fuel Flowmentioning

confidence: 99%

Optimal Control of a Spark Ignition Engine Including Cold Start Operations for Consumption/Emissions Compromises

et al. 2021

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This study presents a semi-empirical modeling approach based on an extensive parametric study using a spark-ignition port-injection engine. The experimental results are used to derive engine-out emission models for each regulated pollutant (CO, HC, NOx) as a function of engine operating parameters. Such parameters include engine speed, intake manifold pressure, equivalence ratio, and spark advance. The proposed models provide accurate predictions over a large range of engine operating conditions. The adequate accuracy and low computational burden of the models are promising in the context of optimal control theory. Dynamic programming is applied in order to find the best operating parameters that define trade-off between fuel consumption and emissions over driving cycles.

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“…In productivity driven market, there is absolute necessity to improve the VE of the small scooter engines in order to enhance drivability of engine throughout the operating regime without compromising in cost, heaviness and fuel consumption of the engine [1].The performance of the engine depend upon the VE. Basically VE of an engine depend upon the inhaling and exhaling of the engine [2,3] and mostly breathing of the engine depends upon the parameters of the intake system. According to Radivoje B et al [4] dimensions of the intake system will have greater influence on VE, VE will impact on the engine performance and empirical studies has proven that optimization of appropriate dimensions can improve favorable VE to high VE [3,4,5,6].…”

Section: Introductionmentioning

confidence: 99%

Optimizing Volumetric Efficiency by Conducting Engine Parameter Studies Using Design of Experiments

Lee,

Veera

2023

Proceedings of the 9th World Congress on Mechanical, Chemical, and Material Engineering

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Improving the Volumetric Efficiency (VE) can boost the engine performance. However, there is no Variable Valve Timing (VVT) and variable intake manifold systems especially for most of the conventional scooter engines. Computer aided simulation has significantly reduced the product development time. Users can analyze more design options across multiple design parameters combination. In this study, 150c.c. single cylinder engine parameters were optimized for maximum VE by using design of experiments. The airbox geometry and valve timing and profile are defined as input variables, which are also controllable factors in the co-simulation work of one-dimensional engine simulation software and DOE analysis software. The advantage of this optimization method is that it allows the flexibility to increase the maximum VE for a specific operating condition or to increase the VE for all operating conditions. The results showed that the VE of the conventional engine increased by 9-17% in the speed range of 3200-5600rpm, and by 4% in the remaining speed range of 6400-8000rpm, showing an overall improvement. This method can effectively reduce product development time, budget and simulation cycle.

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Maximizing Volumetric Efficiency of IC Engine through Intake Manifold Tuning

Cited by 18 publications

References 6 publications

Variable intake manifold geometry influence on volumetric efficiency enhancement at gaseous engine starting speeds

Variable intake manifold geometry influence on volumetric efficiency enhancement at gaseous engine starting speeds

Optimal Control of a Spark Ignition Engine Including Cold Start Operations for Consumption/Emissions Compromises

Optimizing Volumetric Efficiency by Conducting Engine Parameter Studies Using Design of Experiments

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