Ring sticking

Caterpillar IH2 determines the lubricant effect on ring sticking, ring and cylinder wear, and accumulation of piston deposits. 

Ford Kent, which evaluates cold ring sticking, piston skirt varnish, oil thickening and consumption. 

For D1 and D2 only, MWM-B evaluating varnish, carbon deposits, and ring-sticking ... 

For PDl only, VW 1.6L to evaluate ring sticking and piston cleanliness. 

Naphtenic hydrocarbons yield products similar to paraffins upon oxidation. Aromatic hydrocarbons are che most readily oxidized constituents of lubricating oils. The end products are very complex condensation and polymerization products and tend to be Insoluble in oil. These products constitute the sludges, resins and varnishes which allegedly cause piston ring sticking in the engine. 

Sludge dispersers Carbon preventives Anti-ring-sticking agents... 

A comparison with morphine shows that the extra ring sticks out from what used to be the crossbar of the T-shaped structure (Fig. 12.27). 

Two-stroke oils Esters such as C36 dimer esters and polyoleates have several advantages over mineral oils as the lubricant component of two-stroke engine fuel mixtures. First, their clean-burn characteristics result in less engine fouling with considerably reduced ring sticking and lower levels of particulate deposit build-up... 

Good oxidation Neutralise sulphur Prevent ring sticking... 

TU5JP-L4 CEC L-088-T-02 High-temperature deposits, ring sticking. Oil thickening and consumption... 

High-temperature CECL-088-02 Ring sticking (each part) Merit >9.0 ... 

Figure 30 Mechanism and structure of BluB. The proposed mechanism by Ealick and Begley for the transformation of reduced FMN Into dimethylbenzimidazole Is shown. All these reactions are performed by a comparatively small homodimeric enzyme called BluB. In the figure, the monomers are colored green hellces/orange sheets and blue hellces/purple sheets. An oxygen-trapped structure of the enzyme, where the oxygen (ball) Is positioned above the Isoalloxazine ring (stick representation) of the flavin Is shown.

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