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. 01, 2009
Filed:
Oct. 07, 2005
Noritaka Yamaguchi, Wako, JP;
Yutaka Tamagawa, Wako, JP;
Noritaka Yamaguchi, Wako, JP;
Yutaka Tamagawa, Wako, JP;
Honda Motor Co., Ltd., Tokyo, JP;
Abstract
The present invention includes temperature transition estimating meansfor estimating a temperature transition of an electric motorcaused by the passage of electric current through the electric motor, an electric pumpas coolant supplying means for supplying a coolant to the electric motor, and coolant supply control meanstofor controlling the pumpaccording to the temperature transition of the electric motorand the coolant temperature. The amount of operation of the electric pumpis determined from the temperature transition and the coolant temperature. This structure makes it possible to prevent overheating of the electric motor properly using the coolant while minimizing the energy consumption involved in using the coolant.