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.

A segmented thrust bearing with ramped and chamfered surfaces lets older crankshafts fit new engine blocks while raising thrust capacity and limiting wear.

Varying bearing alloy and back metal thickness helps a crankshaft half thrust bearing trap contaminants, reduce deposition, and prevent seizure.

A center-thick resin coating improves oil film formation on half thrust bearings, raising seizure resistance while keeping friction low.

Melamine cyanurate in a PAI bearing overlay cuts friction and wear while improving thermal stability and load capacity in stop-start engines.

Laser-formed oil holes avoid punching distortion and burrs, improving sliding bearing circularity and holder contact area.

A metering and application roller coats thrust washer blanks uniformly to the edges without lacquer runoff or contamination.

Axial convex grooves discharge water from oil in a half bearing, limiting cavitation erosion while preserving oil pressure at high speed.

Intersecting axial and circumferential grooves discharge hot oil from a half bearing to maintain lubrication and prevent seizure.

A resin coating that is thickest at the bearing center and thinner at the ends improves oil film formation, seizure resistance, and low friction.

Metal oxide particles in a polymer bearing overlay improve heat dissipation and wear resistance under high-load stop-start engine operation.

Melamine cyanurate dispersed in a PAI bearing overlay lowers friction and wear while maintaining load capacity and thermal stability in stop-start engines.

A dual sigma-delta modulator and decimation filter use bit integration and complement initialization to improve pixel signal conversion resolution.

Asymmetric sleeve bearing shells isolate parting lines from high horizontal loads, reducing wear and extending engine component life.

Localized narrow grooves in a slide bearing reduce frictional area and effluent oil volume without compromising load carrying capacity.

Semi-annular half thrust bearing uses convex recesses with circumferential grooves to retain lubrication oil and guide flow directionality.

Transition regions in a main bearing disperse high-pressure oil jets, reducing bubble formation and cavitation erosion on the bearing surface.

Asymmetric thrust relief geometry directs lubricating oil to the central slide surface, preventing crankshaft seizure from reduced rigidity.

A tin-containing layer bonds to a ferrous base via an iron-distannide-free zone.

Variable axial width sliding bearing design reduces frictional resistance at non-load areas.

Glycerol oleate friction modifiers reduce journal bearing wear by 80% while maintaining low viscosity fuel economy.

Segmented relief portions trap lubricant to raise temperature and improve fuel efficiency during frequent idling stops.

Axial groove design directs debris into discharge paths using inertia forces.

Half thrust bearing with unequal rear and front thrust relief lengths directs oil flow to the sliding surface.

A jig guide passage with a protruding portion directs semi-circular members into correct orientation during supply.

Segmented circumferential grooves and an oil distribution passage maintain crankpin lubrication when the inlet communicates with a collection groove.

Segmented circumferential grooves guide foreign matters into axial channels, preventing embedment at high crankshaft speeds.

A slide bearing with asymmetrical radial groove depth gradients reduces friction while managing oil film pressure.

A sliding member overlay layer features a raised portion to retain lubrication oil along the shaft axis.

Positioning the inner surface groove at 90 to 105 degrees suppresses oil leakage while maintaining load capacity.

Tapered core rods impart convex internal surfaces during compaction, eliminating costly post-processing machining steps.

Segmented narrow grooves reduce the sliding contact area in a split cylindrical bearing, maintaining oil film pressure while minimizing effluent oil volume.

An asymmetric peripheral edge gradient in a slide bearing manages oil film pressure to reduce effluent oil volume while maintaining load carrying capacity.

Nitrided steel guide elements extend lifespan by 2.5 times while resolving tribological performance trade-offs in severe wear conditions.

A thrust washer slip surface uses an asymptotic curve to connect ramp and flat sections for stable oil film formation.

A half thrust bearing features a semicircular-ring shape with specific thrust reliefs on the slide surface.

Angled recessed grooves on bearing shells improve oil supply distribution, delaying cavitation onset and minimizing surface damage under high pressure.

Asymmetric thrust relief lengths direct lubrication oil into clearances, preventing resin layer damage from reduced crankshaft rigidity.

Lip seals on shot-blasted groove ends retain lubricant oil to minimize outflow during cold engine starts while maintaining sufficient oil film pressure.

Asymmetric thrust reliefs on half bearings direct more oil to sliding surfaces, preventing seizure under reduced lubrication supply.

Localized narrow grooves in a slide bearing reduce friction without decreasing load capacity or increasing effluent oil volume.

A slide bearing design uses a circumferential groove and recess to reduce frictional area while maintaining oil film pressure.