燃焼機関の潤滑油に含まれるディーゼル燃料の量を決定する方法

Japanese Patent JP5478069

B2

The determination of a proportion of diesel fuel in a lubricating oil of a combustion engine, comprises forming a mixture containing a sample of lubricating oil and 5C alkane, injecting the mixture into an injector of gas chromatograph, establishing a chromatograph of the sample, determining a first parameter M representative of a chromatograph peak area associated with alkane, and determining a second parameter C representing of the chromatograph peak area associated with a 20-25C alkane of the diesel fuel. The determination of a proportion of diesel fuel in a lubricating oil of a combustion engine, comprises forming a mixture containing a sample of lubricating oil and 5C alkane, injecting the mixture into an injector of gas chromatograph, establishing a chromatograph of the sample, determining a first parameter M representative of a chromatograph peak area associated with alkane, and determining a second parameter C representing of the chromatograph peak area associated with a 20-25C alkane of the diesel fuel, and determining the proportion T of diesel fuel by (C/(M)-b)/a, where a and b are the constants defined by the equation y = ax+b of a straight line calibration, which is in relation between the first and second parameters with respect to the proportion of diesel fuel. The diesel fuel content is calculated according to the second parameter C of the chromatograph. The second parameter is established by C = alpha xC 0/(C 5), where C 0 is the hydrocarbon peak area, alpha is correction coefficient to a reference concentration, and C 5 is the hydrocarbon concentration in the sample. The formed mixture comprises carbon disulfide in the predetermined proportion. Preliminary determination of the straight-line calibration equation comprises determining the parameters a and b of the straight-line calibration. Each chromatograph is established by a flame ionization detector and a calculation gives integrations of the chromatograph to calculate each peak area of the chromatograph.

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Eric Fitaman
Tike, Laurent

JP2008539476A

April 23, 2014

October 26, 2006

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RENAULT S.A.S.

C10M177/00; G01N30/04; G01N30/86; G01N30/88; G01N33/30; C10N70/00

JP11271295A

STANDARD TEST METHOD FOR DIESEL FUEL DILUENT IN USED ENGINE OILS BY GAS CHROMATOGRAPHY,[ONLINE],ASTM,2004年11月,P1-6,URL,http://webstore.ansi.org/ansidocstore/product.asp?sku=ASTM+D3524%2D04
DIN 51380 : DETERMINATION OF READILY VOLATILE COMPONENTS IN 以下備考,[ONLINE],DIN,1990年11月,USED AUTOMOTIVE ENGINE OILS BY GAS CHROMATOGRAPHY,URL,http://webstore.ansi.org/ansidocstore/product.asp?sku=DIN+51380

Sonoda Yoshitaka
Kobayashi Yoshinori

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