Ignition timing control of homogeneous charge compression ignition engines by pulsed flame jets

Murase, Eiichi; Hanada, K.

doi:10.1080/713713034

Cited by 13 publications

(6 citation statements)

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“…The PFJ igniter is of the same size and shape as an ordinary spark plug, and it contains a small cavity and an orifice (Murase, 1995;Murase and Hanada, 2001, 2002, 2003Murase et al, 1996Murase et al, , 2004Oppenheim et al, 1990). The fuel injector is connected to the cavity via an insulator and a hollow center electrode.…”

Section: Pulsed Flame Jet (Pfj)mentioning

confidence: 99%

Photographic Observation and Emission Spectral Analysis of Homogeneous Charge Compression Ignition Combustion

Murase

Hanada

Miyaura

et al. 2005

Combustion Science and Technology

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Experimental studies of homogeneous charge compression ignition (HCCI) combustion have been conducted by using a compact rapid compression machine. The image of the cool flame was captured by a high-speed camera with image intensifier, and during the cool flame appearance the Emeleus cool flame band was observed. Then blue flame became evident, its emission spectrum being similar to that of the cool flame with overlapping by HCO bands. During the main heat release duration, the hot flame emission spectrum was observed, where the distinct OH emission appeared, and it was superimposed on the carbon monoxide oxidation continuum. After the main heat release, the broad peak of the spectrum was shifted to the longer-wavelength side, and the images of the flames changed to red, especially at higher equivalence ratios. This red coloration must originate from the H 2 O vibration-rotation bands (580.7-966.9 nm). On the other hand, it has been revealed that a pulsed flame jet (PFJ) has the potential for directly controlling the start of HCCI combustion. In the jet of PFJ, the emission spectrum obtained was composed of distinct OH and CH emissions superimposed on the carbon monoxide oxidation continuum.

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Section: Pulsed Flame Jet (Pfj)mentioning

confidence: 99%

Photographic Observation and Emission Spectral Analysis of Homogeneous Charge Compression Ignition Combustion

Murase

Hanada

Miyaura

et al. 2005

Combustion Science and Technology

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“…By PFJ igniter, the onset of HCCI combustion was advanced, and earlier spark discharge of PFJ igniter led to earlier HCCI combustion, as seen in the past study with RCM. 17 Thus, PFJ igniter can control the onset of HCCI combustion and is useful for optimizing the ignition timing when autoignition would occur after the optimum timing. In this case, the spark discharge timing of PFJ to give the largest indicated mean effective pressure (IMEP) was −10° after top dead center (ATDC).…”

Section: Resultsmentioning

confidence: 99%

“…PFJ has a great potential to enhance ignition reliability and burning rate in lean mixtures within the flammability limit. 6,7,13–17 The concept of jet ignition was proposed by Gussak, 18 and the jet igniters were developed by Oppenheim. 6,19 The fuel injection system was improved by Murase, and his ignition method was named PFJ ignition.…”

Section: Introduction*mentioning

confidence: 99%

“…6,19 The fuel injection system was improved by Murase, and his ignition method was named PFJ ignition. 17 Through PFJ, the combustion is initiated by the jet issuing from the orifice of the igniter, that is, the combustion is initiated volumetrically. 16 It is expected that this volumetric combustion initiation behaves as a trigger for the autoignition of HCCI.…”

Section: Introduction*mentioning

confidence: 99%

“…16 It is expected that this volumetric combustion initiation behaves as a trigger for the autoignition of HCCI. In the previous studies, HCCI combustion initiated by PFJ was studied using rapid compression machine (RCM), 14,17 and it was shown that PFJ can advance the ignition timing of HCCI combustion, and that PFJ will be useful for optimizing the ignition timing when autoignition occurs after the optimum timing. However, the volume of the combustion chamber is kept constant after a compression stroke in RCM, and therefore, the indicated work could not be measured.…”

Section: Introduction*mentioning

confidence: 99%

See 2 more Smart Citations

A study on the direct control of the start of homogeneous charge compression ignition combustion by pulsed flame jet with rapid compression expansion machine

Murase

Moriue

Hashimoto

et al. 2014

International Journal of Engine Research

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Aiming at direct ignition-timing control of homogeneous charge compression ignition in low-load conditions, pulsed flame jet, which is the jet of burning gas issuing from a small cavity facing a combustion chamber, was utilized. The characteristics of homogeneous charge compression ignition combustion initiated by pulsed flame jet were investigated using rapid compression expansion machine, which realizes single compression and expansion strokes and thus the measurement of indicated work. Higher indicated mean effective pressure was obtained using pulsed flame jet without increasing NOx emission drastically, and it was shown that pulsed flame jet has potential to control the onset of homogeneous charge compression ignition combustion appropriately. The validity of pulsed flame jet utilization was shown through pressure and NOx measurements.

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A comparative study to evaluate the effects of pre-chamber jet ignition for engine characteristics and emission formations at high speed

Yontar

2020

Energy

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Ignition timing control of homogeneous charge compression ignition engines by pulsed flame jets

Cited by 13 publications

References 0 publications

Photographic Observation and Emission Spectral Analysis of Homogeneous Charge Compression Ignition Combustion

Photographic Observation and Emission Spectral Analysis of Homogeneous Charge Compression Ignition Combustion

A study on the direct control of the start of homogeneous charge compression ignition combustion by pulsed flame jet with rapid compression expansion machine

A comparative study to evaluate the effects of pre-chamber jet ignition for engine characteristics and emission formations at high speed

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