A Brief Overview on Ion Current Detecting Technology of Gasoline Engines and Its Application Potential in FSAE

The use of ionization sensors, by means of a standard spark plug, in gasoline engines is well known. This paper focuses on the use of these sensors for controlled auto-ignition (CAI) gasoline engines, where the air-fuel mixture ignites without the need of a spark. The averaged ion current signals obtained are first observed and compared to the heat release rate and then a method to detect with accuracy the location of the 50 per cent mass fraction burned is described. The variation of emissions is studied and the effects of using a pressure sensor (to calculate the heat release rate) or an ion current sensor are portrayed. Thus it is proved possible to keep the emissions under strict control by using an ion current sensor.

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Ion Current Detection During Cold Starting and Idling in Diesel Engines

ASME 2012 Internal Combustion Engine Division Fall Technical Conference ◽

10.1115/icef2012-92093 ◽

2012 ◽

Author(s):

Sanket Gujarathi ◽

Tamer Badawy ◽

Naeim Henein

Keyword(s):

Feedback Control ◽

Signal Detection ◽

Fuel Consumption ◽

Diesel Engines ◽

Ion Current ◽

Current Signal ◽

Gasoline Engines ◽

Cold Starting ◽

High Concentrations ◽

Current Detection

Cold starting of diesel engines is characterized by inherent problems such as long cranking periods and combustion instability leading to an increase in fuel consumption and the emission of high concentrations of hydrocarbons which appear as white smoke. The ion current signal has been considered for the feedback control of both gasoline and diesel engines. However, the ion current signal produced from the combustion of the heterogeneous charge in diesel engines is weaker compared to that produced from the combustion of the homogeneous charge in gasoline engines. This presents a problem in the detection of the ion current signal in diesel engines, particularly during starting and idling operations. This paper investigates and addresses the ion current detection problems pertaining to cold starting and various idling speeds. Also, different approaches have been investigated to improve the signal detection under these conditions.

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Combustion and Ion-Current in Gasoline Engines

Transactions of the Japan Society of Mechanical Engineers ◽

10.1299/kikai1938.36.808 ◽

1970 ◽

Vol 36 (285) ◽

pp. 808-817 ◽

Cited By ~ 1

Author(s):

Yoshisuke HAMAMOTO

Keyword(s):

Ion Current ◽

Gasoline Engines

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Abnormal Combustion Diagnosis and Combustion Period Based Phase Estimation with a Modified Form Tandem Ion Current Detection System on SI Gasoline Engines

Energy Procedia ◽

10.1016/j.egypro.2019.01.483 ◽

2019 ◽

Vol 158 ◽

pp. 2098-2105 ◽

Cited By ~ 1

Author(s):

Yuedong Chao ◽

Haifeng Lu ◽

Guangyu Dong ◽

Jun Deng ◽

Liguang Li

Keyword(s):

Detection System ◽

Ion Current ◽

Phase Estimation ◽

Gasoline Engines ◽

Current Detection

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Quantitative Measurements on the Ion Etching of TMV

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100072125 ◽

1973 ◽

Vol 31 ◽

pp. 336-337

Author(s):

Irwin Bendet ◽

Nabil Rizk

Keyword(s):

Electron Microscope ◽

Tobacco Mosaic Virus ◽

Mosaic Virus ◽

Ion Current ◽

Beam Diameter ◽

Ion Etching ◽

Preliminary Results ◽

Quantitative Measurements ◽

Monitoring Devices

Preliminary results reported last year on the ion etching of tobacco mosaic virus indicated that the diameter of the virus decreased more rapidly at 10KV than at 5KV, perhaps reaching a constant value before disappearing completely.In order to follow the effects of ion etching on TMV more quantitatively we have designed and built a second apparatus (Fig. 1), which incorporates monitoring devices for measuring ion current and vacuum as well as accelerating voltage. In addition, the beam diameter has been increased to approximately 1 cm., so that ten electron microscope grids can be exposed to the beam simultaneously.

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Ultrastructural Features of Normal and Diseased Hair Revealed by Ion Beam Etching and Freeze Fracture

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100115419 ◽

1975 ◽

Vol 33 ◽

pp. 358-359

Author(s):

M. Spector ◽

A. C. Brown

Keyword(s):

Electron Microscopy ◽

Scanning Electron Microscopy ◽

Ectodermal Dysplasia ◽

Ion Beam ◽

Freeze Fracture ◽

Ion Current ◽

Ion Beam Etching ◽

Pili Torti ◽

Argon Ion ◽

Scanning Electron

Ion beam etching and freeze fracture techniques were utilized in conjunction with scanning electron microscopy to study the ultrastructure of normal and diseased human hair. Topographical differences in the cuticular scale of normal and diseased hair were demonstrated in previous scanning electron microscope studies. In the present study, ion beam etching and freeze fracture techniques were utilized to reveal subsurface ultrastructural features of the cuticle and cortex.Samples of normal and diseased hair including monilethrix, pili torti, pili annulati, and hidrotic ectodermal dysplasia were cut from areas near the base of the hair. In preparation for ion beam etching, untreated hairs were mounted on conducting tape on a conducting silicon substrate. The hairs were ion beam etched by an 18 ky argon ion beam (5μA ion current) from an ETEC ion beam etching device. The ion beam was oriented perpendicular to the substrate. The specimen remained stationary in the beam for exposures of 6 to 8 minutes.

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