Benefits of spark-ignition engine fuel-saving technolog

Salim, W. S. I. W.; Mahdi, Aghnia; Ismail, Mona M.; Abas, Mohd Azman; Martinez-Botas, Ricardo; Rajoo, Srithar

doi:10.15282/jmes.11.4.2017.6.0272

Cited by 9 publications

(11 citation statements)

References 14 publications

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“…Although in different numbers, the A/C system on the vehicle becomes a significant load on the engine that needs fuel. On the other hand, almost all trends in automotive development are to increase efficiency and reduce emissions [35][36][37].…”

Section: Introductionmentioning

confidence: 99%

Fuel as secondary refrigerant on LPG fuelled vehicle: A thermodynamics analysis

Setiyo

Waluyo

2019

JMES

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In LPG-fueled vehicles, there is a potential cooling from LPG evaporation in the fuel line. Cooling power is obtained without reducing the caloric value of the fuel supplied to the engine. Thus, LPG functions like a refrigerant before it is burned in the combustion chamber. Consequently, there is a change in fuel efficiency. Therefore, this paper presents a new thermodynamic analysis on LPG-fueled vehicles by harvesting cooling power in the fuel line. The total fuel efficiency is calculated by summing the indicated thermal power added by cooling power to the fuel energy supplied. The results show that the A/C system from the fuel line can increase the total fuel efficiency of 3.16%.

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Section: Introductionmentioning

confidence: 99%

Fuel as secondary refrigerant on LPG fuelled vehicle: A thermodynamics analysis

Setiyo

Waluyo

2019

JMES

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“…The CDA deactivates several cylinders with wider throttle openings for compensating the required torque. Wider throttle opening reduces pumping loss and thus improves fuel economy [ 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 ].…”

Section: Introductionmentioning

confidence: 99%

Minimization of Torque Deviation of Cylinder Deactivation Engine through 48V Mild-Hybrid Starter-Generator Control

Shin¹,

Jung

Han

et al. 2021

Sensors

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Cylinder deactivation (CDA) is an effective technique to improve fuel economy in spark ignition (SI) engines. This technique enhances volumetric efficiency and reduces throttling loss. However, practical implementation is restricted due to torque fluctuations between individual cylinders that cause noise, vibration, and harshness (NVH) issues. To ease torque deviation of the CDA, we propose an in-cylinder pressure based 48V mild-hybrid starter-generator (MHSG) control strategy. The target engine realizes CDA with a specialized engine configuration of separated intake manifolds to independently control the airflow into the cylinders. To handle the complexity of the combined CDA and mild-hybrid system, GT-POWER simulation environment was integrated with a SI turbulent combustion model and 48V MHSG model with actual part specifications. The combustion model is essential for in-cylinder pressure-based control; thus, it is calibrated with actual engine experimental data. The modeling results demonstrate the precise accuracy of the engine cylinder pressures and of quantities such as MAF, MAP, BMEP, and IMEP. The proposed control algorithm also showed remarkable control performance, achieved by instantaneous torque calculation and dynamic compensation, with a 99% maximum reduction rate of engine torque deviation under target CDA operations.

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“…A recent successful trend in passenger vehicles improvement involved fuel economy improvement through start-stop technology [1,2]. An aggressive approach to reduce fuel consumptions is by improving internal combustion engine efficiency.…”

Section: Introductionmentioning

confidence: 99%

Design and parametric characterization of flexure bearing as automotive valve spring replacement

Hanipah

Mansor

Akramin

et al. 2019

JMES

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Automotive valve springs occupy substantial space in the cylinder head of an internal combustion engine. In this paper, the design and analyses of a flat spring concept, known as flexure bearing are presented. Further, design approach, characteristics and parametric characterizations of a single-piece flexure bearing concept are outlined. Finite element analysis was used in examining the flexure bearing strength for different designs, materials and thicknesses. The results show that the maximum stress values are independent of the material types when the number of arm is three and above. The strain values are limited to less than 1% for all materials when the thickness is more than 1mm. The results have provided characteristics for future selection of the flexure bearing in relation to the intended axial displacement.

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Benefits of spark-ignition engine fuel-saving technolog

Cited by 9 publications

References 14 publications

Fuel as secondary refrigerant on LPG fuelled vehicle: A thermodynamics analysis

Fuel as secondary refrigerant on LPG fuelled vehicle: A thermodynamics analysis

Minimization of Torque Deviation of Cylinder Deactivation Engine through 48V Mild-Hybrid Starter-Generator Control

Design and parametric characterization of flexure bearing as automotive valve spring replacement

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