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:
May. 26, 2020
Filed:
Jan. 12, 2017
Applicant:
Hitachi Automotive Systems, Ltd., Ibaraki, JP;
Inventors:
Assignee:
HITACHI AUTOMOTIVE SYSTEMS, LTD., Ibaraki, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F02D 41/24 (2006.01); F02D 41/00 (2006.01); H02M 1/32 (2007.01); F02D 41/20 (2006.01); F02D 41/22 (2006.01); H02M 3/155 (2006.01); H02M 1/00 (2006.01); F02D 41/30 (2006.01); H02M 1/08 (2006.01); H02M 3/156 (2006.01);
U.S. Cl.
CPC ...
H02M 1/32 (2013.01); F02D 41/20 (2013.01); F02D 41/22 (2013.01); F02D 41/3064 (2013.01); H02M 1/00 (2013.01); H02M 1/08 (2013.01); H02M 3/155 (2013.01); H02M 3/156 (2013.01); F02D 2041/201 (2013.01); F02D 2041/2006 (2013.01); F02D 2041/2048 (2013.01); H02M 2001/0009 (2013.01); H02M 2001/327 (2013.01); Y02T 10/40 (2013.01);
Abstract
To protect a switching element to be used in a boost circuit for an in-cylinder injection type internal combustion engine or the like from damage caused by overheating without using a temperature detection element. In a control circuit that switches a switching element between a conductive state and a non-conductive state, the switching element is controlled or a temperature of the switching element is estimated based on a potential difference between an input terminal and an output terminal of the switching element and a voltage applied to a control terminal of the switching element in the conductive state.