Experimental studies on low pressure semi-direct fuel injection in a two stroke spark ignition engine

Loganathan, M.; Ramesh, A.

doi:10.1007/s12239-009-0018-0

Cited by 6 publications

(2 citation statements)

References 10 publications

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“…The study of the fuel-air interaction is fundamental to address the choice of the injector and of the injection strategies (Loganathan and Ramesh, 2009). Homogeneouscharge high-speed operations are the most critical operations on 2-Stroke GDI engines because of the limited time available for fuel evaporation and mixing.…”

Section: Set-up Of the Design Toolsmentioning

confidence: 99%

CFD optimization of a 2-stroke range extender engine

Mattarelli

Rinaldini

Cantore

2015

Int.J Automot. Technol.

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A very promising concept for small range extenders (peak power less than 40 kW) is represented by the 2-stroke, direct injection spark ignition engine, with scavenging and exhaust ports controlled by the piston, and an external pump. The most important issue to be addressed on this type of engines is the compliance with stringent rules on pollutant emissions, which depends on combustion patterns and the quality of the scavenging process. The latter is generally hindered by the symmetry of ports timings, but this handicap can be canceled by adopting a patented rotary valve, controlling the flow through a set of auxiliary transfer ports, and using a piston pump for delivering air to the power cylinder and enhancing the balance of the crankshaft. The paper reviews the design of a virtual engine, rated at 35 kW at 5600 rpm, and developed according to the above mentioned concepts. Design has been driven by CFD simulation, using, whenever possible, experimentally calibrated numerical models, or experimental information derived from similar projects. Particular care has been devoted to characterize the scavenging process and the flow patterns within the cylinder and through the ports, analyzing the influence of the rotary induction valve. Engine performance parameters have been predicted by using a well-established commercial software (GT-Power, by Gamma Technologies), while CFD-3D analyses have been carried out by means of a customized version of the KIVA-3V code. The whole study is conceived as the basis for the construction of a physical prototype. The power target has been virtually achieved with a very light and compact engine (estimated weight without the close-coupled electric motor: 35 kg). A three-way catalyst allows the engine to comply with the most stringent emission regulations, without relevant penalizations on fuel efficiency. Furthermore, the engine can work with lean mixtures, achieving a minimum specific fuel consumption comparable to a current automotive Diesel engine (223 g/kWh). This excellent result is due to the low friction and pumping losses of the 2-Stroke engine, as well as to the compactness of the combustion chamber and the capability to stratify the charge

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Section: Set-up Of the Design Toolsmentioning

confidence: 99%

CFD optimization of a 2-stroke range extender engine

Mattarelli

Rinaldini

Cantore

2015

Int.J Automot. Technol.

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“…A good experimental study on low pressure direct injection is shown in [8]; [9]. This premise, however, depends on the load conditions and engine speed, so it cannot always be achieved, mainly due to the physical and chemical delays of the combustion process in Otto cycle engines.…”

Section: Introductionmentioning

confidence: 99%

Low-pressure gasoline direct injection system development and emissions analysis for a reciprocating two-stroke engine

Gutiérrez,

Sala,

Delpeuch

2023

Preprint

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This study presents the design and construction of an electronic low-pressure gasoline direct injection system for two-stroke engines, with the objective to study engine performance and the emission of exhaust polluting gases, maintaining the expectations of this type of engine. The investigation includes a test bench with an incorporated engine and the required control devices for this, as well as a gas analyzer Class 0, a Computerized Data Acquisition and several tools for displaying and process all the electronic signals from the engine in real time. In order to manage this system, a custom electronic injection control unit has been designed and built, which allows control the fuel injection timing and duration. This unit uses the signal from an inductive sensor installed in the crankshaft as a reference and synchronization point. Additionally, modifications have been made to the fuel feeder circuit and the electronic of the test engine, as well as to some parts of the mechanism in order to adapt them to this technology. The implementation of the engine tests is described, and the performance and operational points of the original system and those of the new injection system are evaluated.

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Wall-wetting model based method for air-fuel ratio transient control in gasoline engines with dual injection system

Zhang

Shen

et al. 2013

Int.J Automot. Technol.

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Experimental studies on low pressure semi-direct fuel injection in a two stroke spark ignition engine

Cited by 6 publications

References 10 publications

CFD optimization of a 2-stroke range extender engine

CFD optimization of a 2-stroke range extender engine

Low-pressure gasoline direct injection system development and emissions analysis for a reciprocating two-stroke engine

Wall-wetting model based method for air-fuel ratio transient control in gasoline engines with dual injection system

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