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:
May. 27, 2003
Filed:
Jan. 10, 2002
Masaharu Hayakawa, Obu, JP;
Takashi Horibe, Obu, JP;
Shigeru Arakawa, Obu, JP;
Hidenori Hirosawa, Obu, JP;
Aisan Kogyo Kabushiki Kaisha, Aichi, JP;
Abstract
The object of the present invention is to promote warming-up operation in a cooling water flow control system of an internal combustion engine. A flow control valve is provided at a junction of a radiator passage and a bypass passage. Radiator flow rate and bypass flow rate of the flow control vale are controlled by detecting engine outlet water temperature, radiator outlet water temperature, number of revolutions of engine, and suction pipe negative pressure. The cooling water in the bypass passage passes through a throttle body, and flow rate is controlled to a totally closed flow rate or a micro-flow rate in the warming-up operation, and this contributes to the promotion of the warming-up operation.