Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – Vehicle diagnosis or maintenance indication
Reexamination Certificate
2007-05-22
2007-05-22
Nguyen, Cuong H. (Department: 3661)
Data processing: vehicles, navigation, and relative location
Vehicle control, guidance, operation, or indication
Vehicle diagnosis or maintenance indication
C701S030000, C701S031000, C701S035000, C474S018000, C474S028000
Reexamination Certificate
active
10676266
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.
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Taeyoung Han et al., Engine Oil Viscometer Based on Oil Pressure Sensor, SAE Technical paper series, Jan. 2006.
Unknown, ToyotaFinancial.com—Used vehicle protection plans comparison, 2 pages, Apr. 28, 2006.
Kang Jihoon
Kawamura Yasutaka
Okahara Hirofumi
Park Donggyun
Shimanaka Shigeki
JATCO Ltd
Nguyen Cuong H.
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