G - Physics – 01 – N
Patent
G - Physics
01
N
73/55
G01N 21/35 (2006.01) F16N 29/00 (2006.01) G01N 21/03 (2006.01) G01N 33/28 (2006.01) G01N 21/85 (2006.01)
Patent
CA 2003239
An apparatus for detecting the deterioration of an engine oil including a ceramic heater radiating infrared light including infrared radiation having a wavelength of 6.1 micron meters which is equal to the specific infrared absorption peak of ester of nitric acid contained in the engine oil. The infrared light is made incident upon a photodetector via a band pass filter having a center wavelength of 6.1 micron meters to detect an amount of the ester of nitric acid contained in the engine oil. It has been experimentally confirmed that an amount of the ester of nitric acid is proportional t the total acid value which is a measure of the deterioration of the engine oil, so that by suitably processing an output signal of the photo- detector, it is possible to detect the deterioration of the engine oil. The thus detected deterioration may be displayed on a display device provided on a front panel of a car.
Hosonuma Kunihiko
Inada Ryoichi
Naito Yasushi
Japan Energy Corporation
Swabey Ogilvy Renault
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