Numerical and Experimental Study of Fuel and Air Flow in Carburetors for Small Engines

Arias, Diego A.; Shedd, Timothy A.

doi:10.4271/2004-32-0053

Cited by 11 publications

(4 citation statements)

References 15 publications

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“…They also used the model to derive a sensitivity analysis of geometries and physical properties of air and fuel. Arias (2005) conducted an experiment to validate the steady state model of a carburetor by measuring the fuel and air flows in a commercial (Nikki) carburetor. A flow-amplifier is used to create a low pressure zone downstream the carburetor.…”

Section: Literature Reviewmentioning

confidence: 99%

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Design and analysis of fuel intake system for biogas operated spark ignition engine

Arali¹,

Kulkarni²

2013

2013 International Conference on Energy Efficient Technologies for Sustainability

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Improving the biogas engine performance by implementing the pressurised turbulent flow is discussed in this paper. The pressurised flow will increase volume of the fuel; hence improve the volumetric efficiency and the turbulence will increase the homogeneity of mixture; hence improve the flame speed. It is also known that the inlet port design and the intake manifold configuration have a direct influence on engine performance and emissions. Based on this fact, the intake process may give a great contribution towards increasing the Biogas engine performance; the paper focuses on the design and analysis of the fuel intake system as economical devices without major modification. It includes analytical design of an intake system for biogas operated single cylinder 4-S spark ignition engine.

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Section: Literature Reviewmentioning

confidence: 99%

“…Fuel intake device is one of the important components in such category and it is identified that additional research work is to be carried out in establishing a design procedure for this application [3].…”

Section: Introductionmentioning

confidence: 99%

Design and analysis of fuel intake system for biogas operated spark ignition engine

Arali¹,

Kulkarni²

2013

2013 International Conference on Energy Efficient Technologies for Sustainability

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“…As previously introduced, the research focused on the development of a conversion kit for small-size four-stroke, Otto-cycle reciprocating internal combustion engines equipped with a carburetor; this type of engines, widely used for small-size applications in the agricultural sector, in pumping systems and power units, is typically characterized by a simple design, high reliability and low maintenance, but offers however medium-low performances in terms of efficiency and environmental standard; in fact, in order to contain the costs and increase the simplicity of construction and maintenance, these engines typically do not integrate the same modern technology used on more advanced engines, such as those adopted in the automotive field, e.g. electronic fuel injection systems, EGR (Exhaust Gas Recirculator) or catalytic converter (Arias, 2005;Koederitz, 2003). The purpose of the research is therefore the development of a technique for the conversion of this type of engine, with specific reference to the ones installed on existing gensets, with the dual objective of:…”

Section: Concept Design Of the Multi-fuel Micro-chp Conversion Kitmentioning

confidence: 99%

Development and testing of a multi-fuel micro-CHP conversion kit

Aste

Pero

Maistrello

et al. 2015

Sustainable Cities and Society

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“…More recently, Li & Collings (1999) proposed a semi-empirical model of fuel transport in the intake manifold and demonstrated its application to transient conditions. Arias & Shedd (2004) developed a one-dimensional model which could predict the mixture enrichment and pressure drop under pulsating flow conditions. Itano (1996) studied the flow at the exit of three carburettors under steady state conditions and obtained qualitative film thicknesses by measuring the electric resistance of the fuel film, though droplet sizes were not measured.…”

Section: Introductionmentioning

confidence: 99%

Study of liquid fuel transport in a small carburetted engine in the context of cold-start HC emission control

Tewari

Anand

Nishikant

et al. 2014

Sadhana

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In the present study, a detailed visualization of the transport of fuel film has been performed in a small carburetted engine with a transparent manifold at the exit of the carburettor. The presence of fuel film is observed significantly on the lower half of the manifold at idling, while at load conditions, the film is found to be distributed all throughout the manifold walls. Quantitative measurement of the fuel film in a specially-designed manifold of square cross section has also been performed using the planar laser-induced fluorescence (PLIF) technique. The measured fuel film thickness is observed to be of the order of 1 mm at idling, and in the range of 0.1 to 0.4 mm over the range of load and speed studied. These engine studies are complemented by experiments conducted in a carburettor rig to study the state of the fuel exiting the carburettor. Laser-based Particle/Droplet Image Analysis (PDIA) technique is used to identify fuel droplets and ligaments and estimate droplet diameters. At a throttle position corresponding to idling, the fuel exiting the carburettor is found to consist of very fine droplets of size less than 15 μm and large fuel ligaments associated with length scales of the order of 500 μm and higher. For a constant pressure difference across the carburettor, the fuel consists of droplets with an SMD of the order of 30 μm. Also, the effect of liquid fuel film on the cold start HC emissions is studied. Based on the understanding obtained from these studies, strategies such as manifold heating and varying carburettor main jet nozzle diameter are implemented. These are observed to reduce emissions under both idling and varying load conditions.

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Numerical and Experimental Study of Fuel and Air Flow in Carburetors for Small Engines

Cited by 11 publications

References 15 publications

Design and analysis of fuel intake system for biogas operated spark ignition engine

Design and analysis of fuel intake system for biogas operated spark ignition engine

Development and testing of a multi-fuel micro-CHP conversion kit

Study of liquid fuel transport in a small carburetted engine in the context of cold-start HC emission control

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