Electricity: measuring and testing – Electrolyte properties – Using a ph determining device
Reexamination Certificate
2005-02-22
2005-02-22
Nguyen, Vincent Q. (Department: 2858)
Electricity: measuring and testing
Electrolyte properties
Using a ph determining device
C324S439000, C324S698000, C340S438000
Reexamination Certificate
active
06859039
ABSTRACT:
A method and a device for detecting a deterioration of vehicle oil are disclosed in which the end point of the oil service life can be detected with higher accuracy, while at the same time detecting the progress of the oil condition in the vicinity of the end point of the oil service life. The acidity or basicity of the vehicle oil is measured using a pH sensor (11) generating an output in responding to the degree of the acidity or basicity. The deterioration of the vehicle oil can be detected based on the fact that with the increase in vehicle mileage, a line approximating the output of the pH sensor (11) with respect to the vehicle mileage has a tendency to change from a first inclination to a second inclination larger than the first inclination and then from the second inclination to a third inclination smaller than the second inclination.
REFERENCES:
patent: 5146169 (1992-09-01), Morishita et al.
patent: 5523692 (1996-06-01), Kuroyanagi et al.
patent: 6549015 (2003-04-01), Horie et al.
patent: 56-47614 (1981-04-01), None
patent: 3-175350 (1991-07-01), None
patent: 4-350552 (1992-12-01), None
patent: 6-201649 (1994-07-01), None
Horie Kazuyuki
Naito Kiwamu
Denso Corporation
Nguyen Vincent Q.
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