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:
Oct. 02, 2003
Jihoon Kang, Fuji, JP;
Yasutaka Kawamura, Fuji, JP;
Shigeki Shimanaka, Fuji, JP;
Hiroyasu Tanaka, Fuji, JP;
Donggyun Park, Fuji, JP;
Hirofumi Okahara, Fuji, JP;
Jihoon Kang, Fuji, JP;
Yasutaka Kawamura, Fuji, JP;
Shigeki Shimanaka, Fuji, JP;
Hiroyasu Tanaka, Fuji, JP;
Donggyun Park, Fuji, JP;
Hirofumi Okahara, Fuji, JP;
JATCO Ltd, Fuji-shi, JP;
Abstract
An abnormal oil pressure reduction determining device has an oil pressure sensor which detects a real oil pressure, a sensor which detects a vehicle running state, and a controller which sets an oil pressure command value for an oil pressure control mechanism. The controller computes the lower limiting oil pressure which is possible in the present vehicle running state, and when the real oil pressure is less than this lower limiting oil pressure and the pressure difference between the real oil pressure and oil pressure command value exceeds a reference value, determines that there is an abnormal pressure reduction due to a fault in the oil pressure control mechanism. Even if the oil pressure of the transmission has dropped abnormally due to some reason, the abnormal oil pressure reduction determining device determines the situation without fail.