Experimental study of glow plug assisted compression ignition

Yao, Changsheng; Zhou, Tianyuan; Yang, Fang; Hu, Yaodong; Wang, Jinli; Ouyang, Minggao

doi:10.1016/j.fuel.2017.02.008

Cited by 13 publications

(3 citation statements)

References 47 publications

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“…Yao et al [87] studied the effects of glow plug assist on a four-cylinder compression ignition (CI) engine fueled with dieseline. They utilized the test engine with pressure sensor glow plugs (PSG) controlled through the elaborated a glow plug control unit (GPCU) with the closed-loop power feedback control algorithm implemented.…”

Section: Researches On Glow Plugs Applied In CI Enginesmentioning

confidence: 99%

Problems with glow plug – a review

Woźniak¹,

Ozuna²,

Siczek³

2021

Combustion Engines

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Despite the development of hybrid and electric vehicles, a many-million population of cars with combustion engines, and particularly CI engines occurs on the roads. Also, many stationary CI engines are still utilized. Despite their improved technologies and characteristics the modern CI engines negatively affect an environment due to cold starting problems. Below 0 °C, engine starts are problematic due to the decreased battery performance and the spray characteristics, the increased ignition delay time, and the engine oil viscosity. Therefore, various glow plugs are applied to facilitate this process. Types, features, and applications of glow plugs in various engines have been discussed in the paper. One case of failure of glow plug has been presented in the article, including the cause of it.

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Section: Researches On Glow Plugs Applied In CI Enginesmentioning

confidence: 99%

Problems with glow plug – a review

Woźniak¹,

Ozuna²,

Siczek³

2021

Combustion Engines

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show abstract

“…Borgqvist et al 11 reported a positive effect of GP assistance on combustion stability and combustion efficiency in low load experiments of a gasoline fueled PPCI engine. Engine trials conducted by Yao et al 24 using dieseline as fuel in PPCI mode show improved combustion efficiency and lower cycle-to-cycle (CCV) variations, when using a GP under different speed and load conditions. Natural gas represents a fuel with high auto-ignition resistance and is very difficult to ignite under CI conditions.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on controlled hot surface assisted compression ignition (HSACI) in a naturally aspirated single cylinder gas engine

Judith

Kettner

Koch

et al. 2022

International Journal of Engine Research

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Homogeneous charge compression ignition (HCCI) promises low [Formula: see text] emissions and high efficiency due to fast combustion at low temperatures. However, the control of combustion timing represents a serious challenge due to the lack of dedicated ignition control parameters. This challenge is addressed in this work by means of a hot surface ignition (HSI) system, whose core element consists of a shielded, electrically heated ceramic glow plug. In this approach, termed as hot surface assisted compression ignition (HSACI), a small portion of mixture is thought to ignite in the vicinity of the shielded glow plug and to subsequently propagate to the main combustion chamber in order to initiate bulk-gas auto-ignition. Adjusting the hot surface temperature enables to either advance or retard the onset of combustion and thus, allows to control combustion timing. This paper presents experimental results of initial engine trials, using the HSACI concept in a naturally aspirated single cylinder natural gas engine. Measurements were conducted at a constant engine speed of 1400 l/min and include intake air temperatures in the range of 150–175°C and relative air-fuel ratios ([Formula: see text]) from 2.0 to 2.8. Results show that the HSI system enables combustion under conditions, which do not allow for pure HCCI operation. Moreover, the combustion timing can be actively controlled within certain limits by changing the HSI temperature. Increasing cycle-to-cycle variations limit stable operation at lower temperatures, while a transition to pure HCCI is found at intake temperatures beyond 170°C. The applicable [Formula: see text] range is limited by knocking or uncontrolled combustion toward the rich side and instable operation toward the lean side. Loss analysis points out that wall heat flow and imperfect combustion represent the dominant loss mechanisms. Heat release analysis reveals two pronounced phases, indicating initial flame propagation and subsequent auto-ignition similar to spark assisted compression ignition (SACI).

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“…A glow plug (GP) has been proven to be able to ignite either a liquid fuel like n-hexane 17,18 or a gaseous fuel such as hydrogen 19 in air. GPs have also been applied to natural gas cogeneration engines 20,21 and partially premixed CI engines fueled by a blend of diesel and gasoline 22 and have shown the benefits of improving the engine efficiency and reducing emissions. 20–22 In CI engines, GP ignition has been investigated experimentally by a number of researchers to assist ignition of difficult-to-ignite alternative fuels, including methanol, 23–27 propane, 28 natural gas, 29–32 and heavy liquid fuels.…”

Section: Introductionmentioning

confidence: 99%

Numerical studies of the ignition characteristics of a high-pressure gas jet in compression ignition engines with glow plug ignition assist: Part 2-Effects of multi-opening glow plug shields

Pan

Wallace

2017

International Journal of Engine Research

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The results of a previous study, part 1, showed that use of a shield can improve the thermal performance of a glow plug, and thereby reduce ignition time. However, the part 1 study also found that use of a simple shield with only one circular opening can delay flame propagation out of the shield. The conclusions of that study suggested that there is scope for further improvements of the shield design, especially the shield opening geometry. Accordingly, this article presents the results of computational studies investigating the influence of multi-opening shield designs on natural gas ignition characteristics in glow plug–assisted compression–ignition engines. Two types of multi-opening glow plug shield, consisting of four small circular openings distributed in either diamond-pattern or square-pattern arrangements, were employed. The simulated results demonstrated that both multi-opening shields can not only increase glow plug surface temperature, but also increase the residence time of fuel mixture adjacent to the glow plug surface in the early injection stage, resulting in a faster ignition than the single-opening shield. Furthermore, the diamond-pattern multi-opening glow plug shield provides a faster or comparable flame propagation path back to combustion chamber, compared to single-opening glow plug shield, while the square-pattern multi-opening glow plug shield delays the flame propagation under several specific engine conditions. Compared to the single-opening glow plug shield, the overall natural gas ignition delays are further reduced by 6%–44% when using the diamond-pattern multi-opening glow plug shield, while the square-pattern multi-opening glow plug shield is only able to reduce the natural gas ignition delay under a few specific conditions.

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Experimental study of glow plug assisted compression ignition

Cited by 13 publications

References 47 publications

Problems with glow plug – a review

Problems with glow plug – a review

Experimental study on controlled hot surface assisted compression ignition (HSACI) in a naturally aspirated single cylinder gas engine

Numerical studies of the ignition characteristics of a high-pressure gas jet in compression ignition engines with glow plug ignition assist: Part 2-Effects of multi-opening glow plug shields

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