Stručni rad

MOTOR OIL LOW TEMPERATURE PROPERTIES

Marijan Podobnik
Josip Bambić

Sažetak

Abstract
Motor oils constitute a group of lubricants whose significance is constantly growing with motor industry development, constituting the largest amount of lubricant consumption. Their quality is defined by classification per viscosity and specifications per performances.
The classification defines motor oil low temperature properties by the highest dynamic viscosity at low temperature cold start and by the highest oil pumping dynamic viscosity at low temperatures. The said properties are checked by the Cold Cranking Simulator (CCS) device i.e. by the Miny Rotary Viscometer (MRV) device.
In the latest edition of the SAE J300 classification from February, 2000, new, 5 0C lower temperatures have been introduced for identifying dynamic viscosity with the CCS device, as well as new dynamic viscosity limits.
In keeping with these changes, (CCS) motor oil low temperature properties have been analyzed, showing that the motor oil formulations tested fully meet also the said classification’s new requirements.

Ključne riječi

Engine oil; Classification viewpoint; Viscosity dependence on shear stress; Viscosity dependence on temperature; Society of Automotive Engineers

Hrčak ID:

9558

URI

https://hrcak.srce.hr/9558

Datum izdavanja:

28.12.2001.

Podaci na drugim jezicima: hrvatski

Posjeta: 3.817 *