The Investigation of the Structure and Origins of Gasoline Direct Injection (GDI) Deposits.

Reid, Jacqueline; Mulqueen, Simon; Langley, G. John; Wilmot, Edward; Vadodaria, Saumil Sudhir; Castle, J. E.; Whitaker, James B.

doi:10.4271/2019-01-2356

Cited by 8 publications

(4 citation statements)

References 23 publications

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“…Such a control can be used, for example, to correct the injected mass inaccuracy for a fixed couple of nominal rail pressure level and energizing times, when the injector nozzle holes are affected by coking deposits. 30,31…”

Section: Experimental and Numerical Resultsmentioning

confidence: 99%

Investigation of a GDI injector with an innovative flowmeter for high-pressure transient flows

Ferrari

Pizzo²,

Vento

2023

International Journal of Engine Research

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A new flowmeter for high pressure flows, characterized by intense dynamic events, is presented. The flowmeter algorithm is based on the measurement of two pressure signals along the investigated pipe, and the flowrate is obtained through an ordinary differential equation given by the combination of the continuity and the momentum partial differential equations. This flowmeter has been applied to a GDI injector to monitor the flowrate that enters the injector during an injection event. A 1D numerical model of the GDI injector has been set up and validated, and the numerical outcomes have been used to confirm the consistency of the experimental results obtained from the new flowmeter, for both single and pilot-main injections. The internal dynamics of the injector has also been investigated, using both the 1D numerical tool and the innovative flowmeter. A possible feedback-control strategy has been set up to compensate for any inaccuracy of the injected mass by applying the flowmeter to the hydraulic high-pressure circuit.

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Section: Experimental and Numerical Resultsmentioning

confidence: 99%

Investigation of a GDI injector with an innovative flowmeter for high-pressure transient flows

Ferrari

Pizzo²,

Vento

2023

International Journal of Engine Research

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“…The SEM images correspond to the right side of impingement region, which was marked by a yellow mark in Figure 5b. Analyzing the SEM images, it is possible to see structures that are similar in shape to those found inside a hole injector [30]. Globular smooth structures of deposits are found at the lowest temperature.…”

Section: Ccd Characterizationmentioning

confidence: 87%

Impact of preferential vaporization on combustion chamber deposit generation from a gasoline surrogate: A parametric study

Roque

Hélie²,

Foucher

2021

Proceedings of the Combustion Institute

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“…1. Tuning the size of the fuel dose to the needs of the combustible mixture formed with an excess air ratio of λ = 1 [12] This is necessary in order to maintain the constant excess air ratio of λ = 1 required for the correct and reliable operation of the commonly used three-way exhaust catalytic converters. For this purpose, a lambda sensor installed in the engine exhaust system constantly monitors the oxygen content of the exhaust gases.…”

Section: Introductionmentioning

confidence: 99%

“…As injector deposits increase, the engine's on-board computer gradually increases the fuel dose injection time to compensate for the decreasing fuel flow rate out of the injectors. However, when the amount of long term fuel trim correction exceeds 25%, fuel injection system dysfunction occurs and the engine stops [12].…”

Section: Introductionmentioning

confidence: 99%

Influence of physicochemical properties of gasoline on the formation of DISI engine fuel injector deposits

Stępień¹

2021

Combustion Engines

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This paper describes the results of an engine study of the tendency for fuel injector deposits to form by gasolines of various compositions. Since the factors promoting the formation of fuel injector deposits in DISI engines have, in many cases, been insufficiently identified they require further research and investigation work, which was the greatest motivation for undertaking this project. The latest CEC F-113-KC test procedure for the most damaging deposits in DISI engine injectors was used for this purpose. The research results obtained in the framework of the conducted project indicated T90, aromatic and olefinic hydrocarbons, sulphur, ethanol, DVPE, IBP and fuel density as the most important factors causing the increase in the tendency for deposits to form on the injectors of SI type DISI engines.

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The Investigation of the Structure and Origins of Gasoline Direct Injection (GDI) Deposits.

Cited by 8 publications

References 23 publications

Investigation of a GDI injector with an innovative flowmeter for high-pressure transient flows

Investigation of a GDI injector with an innovative flowmeter for high-pressure transient flows

Impact of preferential vaporization on combustion chamber deposit generation from a gasoline surrogate: A parametric study

Influence of physicochemical properties of gasoline on the formation of DISI engine fuel injector deposits

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