Solenoid driver with high-voltage boost and reverse current capability

Prior to the operation of a solenoid type of fuel injector, a DC voltage is applied across the injector to create a current through the injector that is below the activation current of the injector. A capacitor is then placed in series with the injector and the flyback energy from the injector trans...

Full description

Saved in:
Bibliographic Details
Main Author CHEEVER, JR. GORDON D
Format Patent
LanguageEnglish
Published 25.03.2008
Subjects
BASIC ELECTRIC ELEMENTS
BLASTING
COMBUSTION ENGINES
CONTROLLING COMBUSTION ENGINES
ELECTRIC SWITCHES
ELECTRICITY
EMERGENCY PROTECTIVE DEVICES
HEATING
HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
INDUCTANCES
LIGHTING
MAGNETS
MECHANICAL ENGINEERING
RELAYS
SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
SELECTORS
TRANSFORMERS
WEAPONS
Online AccessGet full text

Cover

More Information
Summary:Prior to the operation of a solenoid type of fuel injector, a DC voltage is applied across the injector to create a current through the injector that is below the activation current of the injector. A capacitor is then placed in series with the injector and the flyback energy from the injector transfers a charge onto the capacitor. When the injector current drops to a predetermined level, the capacitor is removed from the circuit and isolated. This process is repeated until a minimum charge is on the capacitor. By placing the capacitor charge onto the injector at the time that the injector is to be activated, the opening response of the injector is improved. By applying the charge on the capacitor to the injector in a manner to neutralize the eddy currents when the voltage across the injector is removed, the closing response is improved.
Bibliography:Application Number: US20050114594