NDLI: Assessing Double Injection and Intake Air Temperature Effects on Gasoline HCCI Engine Performance and Emissions Using Fully-Automated Experiments and Micro-Genetic Algorithms

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Canakci, Mustafa Hruby, Eric Rolf, D. Reitz
Copyright Year	2002
Abstract	Homogeneous charge compression ignition (HCCI) is receiving attention as a new low emission engine concept. Little is known about the optimal operating conditions for this engine operation mode. Combustion at homogeneous, low equivalence ratio conditions results in modest temperature combustion products, containing very low concentrations of NOx and PM as well as providing high thermal efficiency. However, this combustion mode can produce higher HC and CO emissions than those of conventional engines. An electronically controlled Caterpillar single-cylinder oil test engine (SCOTE), originally designed for heavy-duty diesel applications, was converted to a HCCI direct-injection gasoline engine. The engine features an electronically controlled low-pressure common rail injector with a 60°-spray angle that is capable of multiple injections. The use of double injection was explored for emission control, and the engine was optimized using fully-automated experiments and a micro-genetic algorithm (μGA) optimization code. The variables changed during the optimization include the intake air temperature, start of injection timing, and split injection parameters (percent mass of the fuel in each injection, dwell between the pulses). The engine performance and emissions were determined at 700 rev/min with a constant fuel flow rate at 10 MPa fuel injection pressure. The results show that significant emissions reductions are possible with the use of optimal injection strategies.
Sponsorship	Internal Combustion Engine Division
Starting Page	155
Ending Page	163
Page Count	9
File Format	PDF
ISBN	0791816885
DOI	10.1115/ICES2002-459
Volume Number	Design, Operation, and Application of Modern Internal Combustion Engines and Associated Systems
Conference Proceedings	ASME 2002 Internal Combustion Engine Division Spring Technical Conference
Language	English
Publisher Date	2002-04-14
Publisher Place	Rockford, Illinois, USA
Access Restriction	Subscribed
Subject Keyword	Air pollution control Temperature Sprays Combustion Homogeneous charge compression ignition engines Fuels Pressure Flow (dynamics) Engines Optimization Emissions Algorithms Common rail fuel injectors Temperature effects Gasoline Gasoline engines Nitrogen oxides Diesel Thermal efficiency Cylinders
Content Type	Text
Resource Type	Article

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