The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 18, 2002
Filed:
Jun. 13, 2000
Satoru Kawamoto, Chita-gun, JP;
Shinichi Maeda, Hekinan, JP;
Denso Corporation, Kariya, JP;
Abstract
In an electromagnetic injector control apparatus for an engine, a capacitor is connected to a power supply and a solenoid of an injector for accumulating electric charge at a voltage higher than that of the power supply. A driving circuit controls transistors to supply energy from the power supply to the solenoid during an operation period of the solenoid. The driving circuit also controls a transistor so that a timing to start supplying the accumulated energy from the capacitor to the solenoid is delayed from a timing to start the operation of the solenoid as the voltage of the capacitor increases. Thus, the accumulated energy is used to speed up the operating response of the solenoid. The supply of the accumulated energy to the solenoid is stopped when a current flowing in the solenoid reaches a predetermined cut-off level. The capacitor is set to retain an offset of at least a predetermined quantity to be left therein when energy of a counter-electromotive force of the solenoid is recovered at the end of operation of the solenoid.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile