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. 22, 2007
Filed:
Sep. 23, 2005
Yosuke Hoi, Wako, JP;
Hisashi Matsuo, Wako, JP;
Michio Izumi, Wako, JP;
Kazunori Okada, Wako, JP;
Honda Motor Co., Ltd., Tokyo, JP;
Abstract
The use of an oil cooler in an internal combustion engine for a personal watercraft is controlled, whereby excessive cooling of the engine during warmup with cold water operation is avoided, and dilution of oil is substantially prevented. The internal combustion engine includes a bypass oil path connecting respective oil paths upstream and downstream of the oil cooler. The bypass oil path permits oil to be selectively detoured around the oil cooler. An oil thermostat is provided in the upstream oil path for selectively opening either a path to the oil cooler or the bypass oil path, and the oil thermostat is operable to switch the flow of oil therebetween. The oil thermostat opens the bypass oil path when the temperature of the oil is below a predetermined temperature, and directs oil to the oil cooler when the temperature of the oil is equal to or exceeds a predetermined temperature.