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. 03, 2025
Filed:
Mar. 11, 2022
Bosch Corporation, Tokyo, JP;
Takashi Nonoyama, Kanagawa, JP;
BOSCH CORPORATION, Tokyo, JP;
Abstract
Provided is a purge valve driving control device capable of detecting abnormality by utilizing an existing circuit as much as possible while securing resolution and accuracy of solenoid resistance value detection. A battery voltage is applied to one end of a solenoidthrough a first connection terminal, and the other end is connected to a second connection terminal. In a driver circuit, a drive transistorand a shunt resistorare connected in series between the second connection terminaland a ground, and an overcurrent detection circuitthat enables detection of occurrence of an overcurrent in the drive transistoron the basis of a voltage of the shunt resistoris provided, and a microcomputeris configured to be able to determine presence or absence of occurrence of battery short-circuit equivalent to an electrical short-circuit state of the first connection terminaland the second connection terminalon the basis of an output of the overcurrent detection circuit