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:
Oct. 12, 2021
Filed:
Dec. 04, 2018
Applicant:
Denso Corporation, Kariya, JP;
Inventor:
Toshio Nishimura, Kariya, JP;
Assignee:
DENSO CORPORATION, Kariya, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F02D 41/20 (2006.01); H01F 7/20 (2006.01); H01F 7/18 (2006.01); F02D 41/30 (2006.01);
U.S. Cl.
CPC ...
F02D 41/20 (2013.01); H01F 7/1805 (2013.01); H01F 7/206 (2013.01); F02D 41/3005 (2013.01); F02D 2041/2003 (2013.01); F02D 2041/2024 (2013.01); F02D 2041/2051 (2013.01); F02D 2041/2058 (2013.01);
Abstract
An injection controller has a voltage applicator that applies a voltage to a driving coil of an injection valve. After a voltage is applied to the driving coil with a peak current for opening the injection valve, the voltage applicator applies a power supply voltage to the driving coil in an ON-OFF manner, to supply the driving coil with a less-than-peak current. A comparator detects whether a terminal voltage at a terminal of the coil is less than a predetermined threshold voltage. Upon detecting that the terminal voltage is less than the threshold voltage, a discharge switch applies a boosted voltage to the driving coil.