A Study on the Design and Application of Optimized Solenoid for Diesel Unit Injector

With the Environmental Protection Agency (EPA) regulating the amount of NOx, Particulate, HC and CO at all driving conditions, emission standards for diesel engines are becoming more stringent than ever. To meet future emission regulations, researchers have proposed two solutions based on injection...

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Bibliographic Details
Published in:Journal of mechanical science and technology 1999-09, Vol.13 (5), p.414-420
Main Authors: Hwang, Jae-Won, Kal, Han-Joo, Park, Jae-Keun, Martychenko, A. A., Chae, Jae-Ou
Format: Article
Language:English
Subjects:
Control
Design engineering
Design optimization
Diesel engines
Driving conditions
Electric potential
Emission standards
Emissions control
Environmental protection
Fuel injection
Inductance
Injectors
Load resistance
Pneumatics
Regulations
Solenoid valves
Solenoids
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Summary:With the Environmental Protection Agency (EPA) regulating the amount of NOx, Particulate, HC and CO at all driving conditions, emission standards for diesel engines are becoming more stringent than ever. To meet future emission regulations, researchers have proposed two solutions based on injection control, the common-rail type injection system, and the unit injection system. Most researchers agree that the electronically controlled unit injector, which realizes high injection pressure and precise control of SOI (Start Of Injection) and injection quantity, has an advantage in meeting future emission regulations. In order to control the start and end of injection, each unit injector contains a time-controlled high speed solenoid valve. Thus, the fuel injection quantity is determined by the time interval between closing and opening of the solenoid valve. This study introduces a method for the design of the solenoid which is installed in the unit injector. It is shown that there are certain significant parameters to be optimized to improve solenoid performance: inductance, stroke, input voltage, coil resistance, load and switching time.
ISSN:1226-4865
1738-494X
1976-3824
DOI:10.1007/BF02939329