Study on Characteristics of HCCI Engine Operation for EGR, Equivalence Ratio and Intake Charge Temperature and Pressure While Using Dimethyl Ether

2007 ◽  
Author(s):  
Seyed Navid Shahangian ◽  
Seyed Ali Jazayeri ◽  
Nader Bagheri
Keyword(s):  
Kinetic Equations ◽  
Chemical Kinetic ◽  
Fuel Loading ◽  
Engine Operation ◽  
Hcci Engine ◽  
Auto Ignition ◽  
Hcci Engines ◽  
Intake Pressure ◽  
Ignition Characteristics ◽  
And Performance

In this paper a single-zone zero-dimensional thermodynamic model, coupled with chemical kinetic equations, has been developed using Visual FORTRAN programming software to predict combustion and performance characteristics of HCCI engines using DME fuel. The model is used to investigate the effects of intake temperature, fuel loading, intake pressure, and exhaust gas recirculation (EGR) on auto-ignition characteristics, optimum combustion phasing, and performance of the HCCI engines. Simultaneous effects of these variables for finding the most appropriate regime of HCCI engine operation, considering knock and misfire boundaries, are also studied.

Molecular Structure of Hydrocarbons and Auto-Ignition Characteristics of HCCI Engines

2014 ◽  
Vol 7 (3) ◽  
pp. 1050-1061 ◽  
Author(s):  
Gen Shibata ◽  
Ryota Kawaguchi ◽  
Soumei Yoshida ◽  
Hideyuki Ogawa
Keyword(s):  
Molecular Structure ◽  
Auto Ignition ◽  
Hcci Engines ◽  
Ignition Characteristics

Computational Analysis of an Early Direct Injected HCCI Engine with Turbocharger Using Bio Ethanol and Diesel Blends

2015 ◽  
Vol 812 ◽  
pp. 70-78
Author(s):  
S. Natarajan ◽  
A.U. Meeanakshi Sundareswaran ◽  
S. Arun Kumar ◽  
N.V. Mahalakshmi
Keyword(s):  
Chemical Kinetics ◽  
Computational Analysis ◽  
Reaction Path ◽  
Chemical Species ◽  
Operating Conditions ◽  
Injection Time ◽  
Engine Operation ◽  
Hcci Engine ◽  
Hcci Combustion ◽  
Auto Ignition

In this paper the work deals with the computational analysis of early direct injected HCCI engine with turbocharger using the CHEMKIN-PRO software. The computational analysis was carried out in the base of auto ignition chemistry by means of reduced chemical kinetics. For this study the neat diesel and Bio ethanol diesel blend (E20) were used as fuel. The inlet pressure was increased to 1.2 bar to simulate the turbocharged engine operation. The injection time was advanced to 18° before top dead centre (BTDC) i.e., 5° BTDC than normal injection time of 23° BTDC. The equivalence ratio was kept at 0.6 (ɸ=0.6) and the combustion, emission characteristics and chemical kinetics of the combustion reaction were studied. Since pressure and temperature profiles plays a very important role in reaction path at certain operating conditions, an attempt had been made here to present a complete reaction path investigation on the formation/destruction of chemical species at peak temperature and pressure conditions. The result showed that main draw backs of HCCI combustion like higher levels of unburned hydrocarbon emissions and carbon monoxide emissions are reduced in the turbocharged operation of the HCCI engine when compared to normal HCCI engine operation without turbocharger.

A Theoretical Study on Performance and Combustion Characteristics of HCCI Engine Operation With Diesel Surrogate Fuels: n-Heptane, Dimethyl Ether

2008 ◽  
Author(s):  
Seyed Navid Shahangian ◽  
Mojtaba Keshavarz ◽  
Ghasem Javadirad ◽  
Nader Bagheri ◽  
Seyed Ali Jazayeri
Keyword(s):  
Dimethyl Ether ◽  
Diesel Fuel ◽  
Alternative Fuels ◽  
Internal Combustion Engines ◽  
High Efficiency ◽  
Main Stage ◽  
Engine Operation ◽  
Hcci Engine ◽  
Second Stage ◽  
Hcci Engines

HCCI engines have low emission and high efficiency values compared to the conventional internal combustion engines. These engines can operate on most alternative fuels such as dimethyl ether (DME), which has been tested as a possible diesel fuel for its simultaneously reduced NOx and PM emissions. HCCI combustion of both DME and n-heptane fuels display a distinct two-stage ignition reaction with the first stage taking place at fairly low temperatures and the second stage taking place at high temperatures. The second stage is responsible for the main stage of the heat release process. In this study, a single-zone, zero-dimensional, thermo-kinetic combustion model has been developed. MATLAB software is used to predict engine performance characteristics of HCCI engines using two types of diesel fuel: Dimethyl ether and N-heptane. The effects of intake temperature and pressure, fuel loading and addition of EGR gases on auto-ignition characteristics, optimum combustion phasing, and performance of the HCCI engines are considered in this study. Simultaneous effects of these variables for finding the most appropriate regime of HCCI engine operation, considering knock and misfire boundaries, are also investigated.

Effect of oxygen content on n-heptane auto-ignition characteristics in a HCCI engine

2016 ◽  
Vol 184 ◽  
pp. 594-604 ◽  
Author(s):  
Zhijun Wu ◽  
Zhe Kang ◽  
Jun Deng ◽  
Zongjie Hu ◽  
Liguang Li
Keyword(s):  
Oxygen Content ◽  
Hcci Engine ◽  
Auto Ignition ◽  
Ignition Characteristics ◽  
Effect Of Oxygen

Combustion and Emission Characterization of n-Butanol Fueled HCCI Engine

2014 ◽  
Vol 137 (1) ◽  
Author(s):  
Rakesh Kumar Maurya ◽  
Avinash Kumar Agarwal
Keyword(s):  
Fuel Injection ◽  
Combustion Efficiency ◽  
Intake Manifold ◽  
Exhaust Emission ◽  
Injection Technique ◽  
Transportation Fuels ◽  
Hcci Engine ◽  
Auto Ignition ◽  
Hcci Engines ◽  
Homogeneous Charge

Biofuels are attracting global attention as alternate transportation fuels due to advantages of their being produced from locally available renewable resources, lower pollution potential, and biodegradable nature. Butanol is fast emerging as one of the competitive biofuels for use in transportation engines. Homogeneous charge compression ignition (HCCI) engines have shown great potential for higher engine efficiency and ultralow NOx and particulate matter (PM) emissions. This experimental study is therefore carried out to combine the advantages of biofuels and HCCI engines, both. Detailed performance, combustion, and emission characteristics of n-butanol fueled HCCI engine are investigated experimentally. The study is conducted on a four cylinder diesel engine, whose one cylinder was modified to operate in HCCI combustion mode. Port fuel injection technique was used for homogeneous charge preparation in the intake manifold. Auto-ignition of fuel in the engine cylinder was achieved by intake air preheating. In-cylinder pressure-crank angle data acquisition with subsequent heat release analyses and exhaust emission measurements were done for combustion and emission characterization. In this paper, the effect of intake air temperature and air–fuel ratio on the combustion parameters, thermal and combustion efficiency, ringing intensity (RI), and emissions from n-butanol fueled HCCI engine were analyzed and discussed comprehensively. Empirical correlations were derived to fit the experimental data for various combustion parameters.

Ignition Characteristics of Ethane and Its Roles in Natural Gas for HCCI Engine Operation

2015 ◽  
Vol 8 (2) ◽  
pp. 307-328 ◽  
Author(s):  
Hiroki Tanaka ◽  
Kazunobu Kobayashi ◽  
Takahiro Sako ◽  
Yasuyuki Sakai ◽  
Masahiro Furutani ◽  
...  
Keyword(s):  
Natural Gas ◽  
Engine Operation ◽  
Hcci Engine ◽  
Ignition Characteristics

Detailed Chemical Kinetic Simulation of Natural Gas HCCI Combustion: Gas Composition Effects and Investigation of Control Strategies

2000 ◽  
Vol 123 (2) ◽  
pp. 433-439 ◽  
Author(s):  
D. Flowers ◽  
S. Aceves ◽  
C. K. Westbrook ◽  
J. R. Smith ◽  
R. Dibble
Keyword(s):  
Natural Gas ◽  
Control Strategies ◽  
Chemical Kinetic ◽  
Gas Composition ◽  
Gas Combustion ◽  
Combustion Gas ◽  
Hcci Engine ◽  
Hcci Combustion ◽  
Hcci Engines ◽  
Natural Gas Combustion

This paper uses the HCT (hydrodynamics, chemistry and transport) chemical kinetics code to analyze natural gas combustion in an HCCI engine. The HCT code has been modified to better represent the conditions existing inside an engine, including a wall heat transfer correlation. Combustion control and low power output per displacement remain as two of the biggest challenges to obtaining satisfactory performance out of an HCCI engine, and these challenges are addressed in this paper. The paper considers the effect of natural gas composition on HCCI combustion, and then explores three control strategies for HCCI engines: DME (dimethyl ether) addition, intake heating and hot EGR addition. The results show that HCCI combustion is sensitive to natural gas composition, and an active control may be required to compensate for possible changes in composition. Each control strategy has been evaluated for its influence on the performance of an HCCI engine.

Sign in / Sign up

Export Citation Format

Share Document