Development of a Battery-Voltage-Driven Fuel Injector for Direct-Injection Gasoline Engines : 1st Report : Battery Voltage Drive Method and Parameter Changes Compatibility

The conventional fuel injector for direct-injection gasoline engines is driven by voltage step-up circuitry and current control circuitry. The voltage step-up circuitry boosts the battery voltage to near 100 volts. This conventional system is fairly large and a more compact system is preferable. We...

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Bibliographic Details
Published inTransactions of the Japan Society of Mechanical Engineers Series C Vol. 67; no. 657; pp. 1393 - 1400
Main Authors YAMAKADO, Makoto, ABE, Motoyuki, KADOMUKAI, Yuzo, KUBO, Hiromasa, HAMADA, Yasunaga
Format Journal Article
LanguageJapanese
Published The Japan Society of Mechanical Engineers 25.05.2001
Subjects
Battery Voltage Drive
DI Engine
Electromagnetic Actuator
Fuel Injection
Gasoline Engine
Injector
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Summary:The conventional fuel injector for direct-injection gasoline engines is driven by voltage step-up circuitry and current control circuitry. The voltage step-up circuitry boosts the battery voltage to near 100 volts. This conventional system is fairly large and a more compact system is preferable. We have developed a mass producible battery-voltage-driven fuel injector for direct-injection gasoline engines. The injector has a dual-coil structure that enables the injector to operate at the battery voltage, thus eliminating the need for either voltage step-up circuitry or current control circuitry. Deviation in battery voltage and changes in harness resistance are fully compensated through opening-coil energization-time control. In addition, with this control method, the injector can be used with a wide range of fuel pressures. In this paper, the design concept and the dynamic characteristics of the battery-voltage-driven fuel injector with a dual-coil structure and the opening-coil energized-time control method is discussed in detail.
ISSN:0387-5024
1884-8354
DOI:10.1299/kikaic.67.1393