Experimental Investigation on Intake Air Temperature and Air-Fuel Ratio Dependence of Random and Deterministic Cyclic Variability in a Homogeneous Charge Compression Ignition Engine

2011 ◽  
Author(s):  
Avinash Kumar Agarwal
Keyword(s):  
Experimental Investigation ◽  
Air Temperature ◽  
Homogeneous Charge Compression Ignition ◽  
Compression Ignition ◽  
Compression Ignition Engine ◽  
Cyclic Variability ◽  
Ratio Dependence ◽  
Fuel Ratio ◽  
Homogeneous Charge

scholarly journals Effect of Preheating Temperature and Fuel Properties on Combustion and Emission Characteristics of Homogeneous Charge Compression Ignition (HCCI) Engine

2021 ◽  
Vol 9 (5) ◽  
pp. 558-564
Keyword(s):  
Experimental Investigation ◽  
Diesel Engine ◽  
Air Temperature ◽  
Homogeneous Charge Compression Ignition ◽  
Fuel Properties ◽  
Emission Characteristics ◽  
Compression Ignition ◽  
Hcci Engine ◽  
Di Diesel Engine ◽  
Homogeneous Charge

The homogeneous charge compression ignition (HCCI) engine is the promising technology to reduce the pollutants without affecting its performance and it is also proved by the many studies. This study investigates the performance and emission characteristics of HCCI engine fuelled with diesel –waste cooking oil (WCO) blends and also analysed the effect of air temperature and fuel properties on HCCI engine combustion. The experimental investigation was conducted with single cylinder DI diesel engine and it was slightly modified to port injection system for premixing the charge. The electric air heater was adopted in suction pipe to preheat the inlet air. The experimental investigation conducted in two phases, in the first phase the conventional DI diesel engine was tested with different fuel blends such as B25, B50, B75 and B100 and notes the readings. In the next phase, HCCI engine was operated with same blend ratios. During the experimentation on HCCI engine, the suction air temperature was varied between 40⁰C to 90⁰C. From the experimental results, it was found that the HCCI engine has emitted low NOx and smoke emissions at 80⁰C of air temperature for all the blends. Whereas the HCCI engine emitted more carbon monoxide (CO) and hydrocarbon (HC) emissions due to lean mixture causes misfiring in the chamber. In addition, it is also noted that the value of CO and HC has been varied with diesel –WCO blends. The specific fuel consumption (SFC) is increased for diesel and biodiesel fuel in HCCI engine compared to compression ignition (CI) engine

Experimental Investigation of Homogeneous Charge Compression Ignition Engine of Ethanol and Diesel Blends

2013 ◽  
Vol 440 ◽  
pp. 254-259 ◽  
Author(s):  
S. Natarajan ◽  
N.V. Mahalakshmi ◽  
S. Sundarraj
Keyword(s):  
Experimental Investigation ◽  
Homogeneous Charge Compression Ignition ◽  
Fuel Injection ◽  
Research Work ◽  
Compression Ignition ◽  
Oxides Of Nitrogen ◽  
Ignition Timing ◽  
Compression Ignition Engine ◽  
Reduction Of Oxides ◽  
Homogeneous Charge

This paper deals with the experimental investigation of a Homogeneous Charge Compression Ignition (HCCI) Engine system. The main objective of this research work is to study the effects of a premixed fuel ratio on the performance, combustion characteristics and reduction of oxides of nitrogen and smoke intensity, using the HCCI concept. The engine used for the experiments was of a Kirloskar TAF-I series. The engine is a four stroke, single cylinder air cooled diesel engine, of a rated power of 4.4 kW loaded with an electrical dynamometer. An electronic fuel injection circuit was developed to control the ignition timing and duration of the premixed charge. Ethanol was premixed, and a part injected before ignition, whereas the diesel fuel was injected by the conventional injector directly into the cylinder. The part injected ethanol and direct injected diesel were tested in various proportions, to optimize the operating range, and the same setup was tested with various % of EGR.The obtained results include data plots illustrating the performance, combustion and emission characteristics. The results indicate that the concentration of the oxides of nitrogen species rapidly decreased, and the smoke emissions were reduced simultaneously at 20% Rp and 20% EGR in 75% load and full load conditions.

A Spectroscopic Analysis of Combustion in Homogeneous Charge Compression Ignition Engine

2007 ◽  
Author(s):  
Akira Iijima ◽  
Hideo Shoji
Keyword(s):  
Homogeneous Charge Compression Ignition ◽  
Light Emission ◽  
Emission Spectra ◽  
Compression Ignition ◽  
Compression Ignition Engine ◽  
Strong Light ◽  
Fuel Ratio ◽  
Hcci Combustion ◽  
Ignition And Combustion ◽  
Homogeneous Charge

The principal issues of Homogeneous Charge Compression Ignition (HCCI) combustion that must be addressed include ignition timing control and expansion of the stable operation region. Detailed analyses of ignition and combustion mechanisms must be undertaken to resolve these issues. In this study, spectroscopic technique was used to investigate the effects of the air-fuel ratio (AFR) and residual gas state on ignition and combustion characteristics. Spectroscopic measurement was made of light emission spectra. The results revealed that the distribution profile of the light emission intensity of the hot flame differed substantially depending on the air-fuel ratio (AFR). In high AFR condition, a continuous spectrum attributed to carbon monoxide-oxygen (CO-O) glow is seen between 300–500 nm, but there is no strong light emission such as that from the OH radical. However, decreasing the AFR, a strong light emission is seen a little after the CO-O glow in a wavelength range from visible light to the near-infrared region (500–850 nm). It is also clear that increasing the internal EGR declined the cool flame magnitude, which substantially altered the ignition characteristics of HCCI combustion. Specifically, when a low-octane fuel was used, the heat release rate waveform for HCCI combustion showed two-stage ignition, which was clearly observed in the light emission spectra.

Sign in / Sign up

Export Citation Format

Share Document