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:
Jan. 04, 2005
Filed:
Sep. 03, 2002
Yoshikazu Shinpo, Nissin, JP;
Isao Takagi, Okazaki, JP;
Shigetaka Yoshikawa, Aichi-ken, JP;
Hiromichi Murakami, Obu, JP;
Daisuke Yamamoto, Obu, JP;
Yoshikazu Shinpo, Nissin, JP;
Isao Takagi, Okazaki, JP;
Shigetaka Yoshikawa, Aichi-ken, JP;
Hiromichi Murakami, Obu, JP;
Daisuke Yamamoto, Obu, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Aisan Kogyo Kabushiki Kaisha, Obu, JP;
Abstract
An engine cooling system includes a flow control valve and an electronic control unit (ECU) for controlling the flow control valve. The flow control valve regulates the flow rate of coolant flowing through a radiator in a coolant circuit. The ECU feedback controls the opening size of the flow control valve such that the temperature of coolant at an engine outlet seeks a predetermined target value. During the feedback control, the ECU controls the flow control valve such that the opening size of the flow control valve remains above a predetermined lowest value. As a result, the flow control valve is prevented from falling in a small opening size range in which in which it is difficult to cause the engine outlet coolant temperature to seek the target value, and the engine outlet coolant temperature is favorably adjusted.