Crankshaft Bearings TRIZ Cases

A tapered oil groove in a piston-engine main bearing maintains oil flow as drillings close, preventing underpressure, shock waves, and wear.

Ridge-shaped inclined surfaces and radial oil grooves sustain a high-pressure oil film in a crankshaft half thrust bearing to prevent seizure under vibration.

Selective spacers between eccentric bearing rollers cut collision sound while preserving high filling rate and gear stability.

Selective spacers between adjacent rolling elements cut collision noise while preserving bearing strength and filling rate.

A calcium-magnesium detergent blend helps low-viscosity engine oil cut journal bearing wear under start-stop boundary lubrication.

A glycerol oleate friction modifier helps low-viscosity engine oil cut journal bearing wear under boundary lubrication in start-stop engines.

A curved end-region slide surface increases axial clearance to prevent center contact and fatigue when crankshaft bending and vibration rise.

A 180° constant oil groove improves hydrodynamic lubrication in shell bearings while cutting oil flow and maintaining performance under higher pressure.

Variable alloy thickness and exposed relief regions limit foreign matter buildup at the inner edge, helping crankshaft thrust bearings resist seizure.

A copper-rich surface in a sintered ferrous insert creates metallurgical bonding with aluminum castings, improving engine block support.