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:
Sep. 29, 2026
Filed:
May. 22, 2025
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Shoichi Akiyama, Toyota, JP;
Tatsunobu Murai, Okazaki, JP;
Sohichi Imai, Toyota, JP;
Rihito Kaneko, Miyoshi, JP;
TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota, JP;
Abstract
An engine cooling system includes a cooling circuit including a circulation path circulating coolant between an engine and a heater core for heating, by an engine water pump causing coolant to flow to the engine and a heater core water pump causing coolant to flow to the heater core; and a controller controlling the engine water pump and the heater core water pump. The controller includes a first control unit controlling the heater core water pump so a correlation value correlated with lift of the heater core water pump is no greater than an upper limit value where step-out of the engine water pump is suppressible when a drive request is made for the engine water pump when stopped, and a second control unit starting driving the engine water pump when the heater core water pump is controlled so the correlation value is no greater than the upper limit value.