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. 05, 2018
Filed:
Oct. 15, 2015
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, Aichi-ken, JP;
Yohei Hosokawa, Susono, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, Aichi-ken, JP;
Abstract
An engine cooling system including a refrigerant circulation flow channel passing through an engine, an electric refrigerant pump, an electromagnetic valve arranged in the refrigerant circulation flow channel, and a control unit. In the engine cooling system, when the electric refrigerant pump is stopped and the voltage application to the electromagnetic valve is shut off when the electromagnetic valve is closed and the electric refrigerant pump is in operation, the voltage application to the electromagnetic valve is shut off when a first predetermined time period has passed after the electric refrigerant pump is stopped. When the engine is intermittently stopped during warming up of the engine, current application to the electromagnetic valve is shut off while the closed state of the electromagnetic valve is maintained.