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. 19, 2012
Filed:
Feb. 25, 2009
Katsuyoshi Shiobara, Gunma-ken, JP;
Hidehiko Koyashiki, Gunma-ken, JP;
Katsuyoshi Shiobara, Gunma-ken, JP;
Hidehiko Koyashiki, Gunma-ken, JP;
Yamada Manufacturing Co., Ltd., Kiryu-shi, Gunma-ken, JP;
Abstract
A cooling device for an engine including a radiator circulation flow channel, a heater circulation flow channel, a bypass circulation flow channel, a valve, and a pump. The channels merge in the thermostat and form a common flow channel between the thermostat and the engine. The pump is provided in the common flow channel. At a start of a warm-up period and during the warm-up operation, circulation is substantially stopped by the thermostat, cooling water circulation is actuated in the bypass circulation flow channel, and an opening degree of the electronically controlled valve is gradually increased from a minimum as the cooling water temperature rises. The electronically controlled valve is not completely closed even when closed, and is open to a certain degree from an initial stage of the warm-up period, thereby causing part of the cooling water to flow in the bypass circulation flow channel.