Boots – shoes – and leggings
Patent
1982-07-06
1985-03-19
Chin, Gary
Boots, shoes, and leggings
731173, 123196S, 340 52R, 364424, 364551, G01D 2100
Patent
active
045063370
ABSTRACT:
A microcomputer system for indicating that engine lubricating oil should be exchanged when the working life of the engine lubricating oil is over. The system comprises: (a) a first sensor which detects and signals the number of engine revolutions per time; (b) a second sensor which detects the load on the engine; (c) a calculating means which calculates the amount of soot suspended in the lubricating oil during the operation of engine on a basis of the output values of the first and second sensors; (d) a memory means which adds up and stores the calculated amount of soot so as to record a total amount of soot; (e) a judging means which judges whether the total amount of soot in the lubricating oil exceeds a predetermined amount; and (f) an alarm unit which produces an alarm in a predetermined form to request a lubricating oil change when the total amount of soot exceeds the predetermined amount, whereby the working life of the engine lubricating oil can more accurately be determined.
REFERENCES:
patent: 4007629 (1977-02-01), Hochstein
Chin Gary
Cosimano Edward
Nissan Motor Company Limited
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