METHOD OF AND DEVICE FOR DETERMINING MOTOR OIL SERVICE GROUP Russian patent published in 2005 - IPC

FIELD: any industries where motor oils are used.

SUBSTANCE: proposed device contains shaped insert with oxidizer feed axial channel. Ring passage space for cooling agent is found inside shaped insert, and outer surface of middle stage is provided with corrugations. It provides cooling of oil vapors settled on corrugations at heating and dripping down in form of condensate into high temperature oxidation zone. Oil sample meter is provided in lower part of cylindrical head made in form of branch pipe by means of which metered delivery of oil to surface of aluminum weighing bottle is carried out. Oil is applied in layers, each being 150±5 mcm thick, each layer is oxidized, 240±5 s, by delivering oxidizer at rate of 50 l/h directly to surface of oil layer in aluminum weighing bottle. Taken as information index is mass "m" on deposits formed on aluminum weighing bottle. At mass of ratios greater than or equal to 0.0170 g (m≥0.0170g) oil is considered as group "В" oil, and ratio 0.0130g≤m<0.0170g oil is considered as group "Г" and at m<0.0130g, oil is considered as group "Д".

EFFECT: improved accuracy and reduced time taken for determining service group of motor oil under investigation owing to provision of conditions of testing close to real conditions of operation of oil in engine.

3 cl, 2 tbl, 1 dwg