Dynamic engine oil and fuel consumption measurements using tunab

Details Dynamic engine oil and fuel consumption measurements using tunab Dynamic engine oil and fuel consumption measurements using tunab

1994-05-11

1995-08-29

Snay, Jeffrey R.

Chemistry: analytical and immunological testing

Lubricant, grease, mineral oil, hydrocarbon oil product, or...

436101, 436124, 436143, 436171, 250343, G01N 2161

Patent

active

054459648

ABSTRACT:
A method is provided for precisely and concurrently measuring dynamic engine oil consumption and fuel consumption within an internal combustion engine on a real-time basis. Nonradioactive organo- bromine or chlorine compounds are added to the oil in small amounts in their natural isotopic abundance or enriched. Upon complete combustion, the bromine or chlorine is converted into hydrogen bromide (HBr) or hydrogen chloride (HCl), respectively. A tunable diode laser spectrometer is used to determine the trace amounts of the resultant HBr or HCl in the exhaust gases, which continuously flows through a sample cell by the use of a sample line that allows the unimpeded transport of samples, reduces the pressure of the exhaust gas and maintains it at a suitable level for analysis, and prevents the condensation of water vapor in the exhaust gas so as to prevent the dissolution of the tracer compounds in the water condensate.

REFERENCES:
patent: 4338570 (1982-07-01), Kurnit
patent: 4439860 (1984-03-01), Kurnit
patent: 4990780 (1991-02-01), Lee et al.
patent: 5030329 (1991-07-01), Haidle et al.
patent: 5173749 (1992-12-01), Tell et al.

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