Connecting Rod Bearings TRIZ Cases

An eccentric mechanism in a connecting rod adjusts piston height to vary compression ratio, eliminating high-pressure hydraulic support needs.

A connecting rod cap features an orthogonal communication portion extending from a blind female screw hole to the outer surface.

Offset piston pin and crest surface shift center of gravity to reduce vibration in dual link engines.

Segmented outer tubes and a flat guiding surface enable vulcanization of intersecting bush axes, resolving manufacturing constraints.

Discontinuous fiber rings in composite lugs absorb pin bending to prevent crushing and delamination at stress-concentrated bores.

Offset bearing lands align with peak stress points to resolve lubrication timing mismatches and reduce friction.

Perpendicular vibration removes fracture powder without adhesion, ensuring clean surfaces for optimal face fitting of ductile metal components.

An offset convex sliding surface profile improves oil film distribution to reduce wear in internal combustion engines under high pressure.

Two circumferential cage segments connect via interference-fit joints to guide rolling elements in crankshaft bearings.

Tin alloy film on rolling bearing cages resists dissolution in sulfur-based oils while maintaining lubricity.

Conical floating columns and elastic springs align wheel holes, resolving the trade-off between positioning precision and structural complexity.

Rising portions on fractured surfaces align rod and cap portions, resolving titanium alloy toughness issues that prevent brittle fracture splitting.

Offset central axes and a selective locking system enable dynamic compression ratio adjustment, reducing rotational moment oscillation by up to 30%.

Press-fitting high modulus outer rings into a lower modulus sintered connecting rod prevents raceway circularity degradation during assembly.

A bearing wear sensor transmits data via connecting wires to a fixed radio frequency communicator.

Asymmetric pressure pieces induce a 3-point bending stress profile in connecting rod eyes, preventing material breakouts and reducing scrap rates.

One-piece elastomer merging with diverging arms increases material volume to reduce manufacturing costs while enhancing anti-vibration efficiency.

A multi-link piston crank mechanism uses a lower link with a non-uniform crankpin through-hole design to maintain uniform surface pressure on the bearing metal.

Hydraulic rotation of an eccentric cam on the connecting rod adjusts compression ratio, eliminating complex link mechanisms and reducing engine weight.

Concentric bushings with overlapping apertures prevent rotation and enable greasing, resolving loosening issues in short structural components.

A flexible steel small end allows elastic deformation to match piston pin bending.

Accumulated pressurized oil from the bearing reservoir delivers continuous cooling jets to the undercrown, eliminating half-cycle thermal stress gaps.

Oblique fluid passage feeds grooves that retain lubricant against reciprocating forces to prevent small end wear.

A ball-and-socket joint uses a truncated sphere inner raceway to transfer swivelling torque away from the outer ring.

Segmented recesses extract wear debris from lubricant film, reducing friction and extending crankshaft bearing life.

Welding replaces meshing teeth on the eccentric and eccentric lever, reducing manufacturing complexity and wear susceptibility.

Narrow press tools wrap bearing material to create positioning members, reducing circumferential deformation and improving tool durability.

Optimized carbon and alloy content disperses MnS inclusions to enhance fracture-splitability without lead.

Varying radial wall thickness around lubricating oil bores maintains structural strength while enabling effective lubrication of the eccentric joint.

A Ti-V-based steel composition achieves high fatigue strength and fracture splitting performance for automotive connecting rods.

Thin-waisted projections on a centrifugal cast support member ensure complete groove filling and prevent displacement.

Calculating axial and mating surface separation safety factors determines the minimum bolt diameter, preventing breakage while reducing connecting rod weight.

Iron bearing cage eliminates interface cavities between copper and silver layers to extend sliding durability.

A spherical bearing assembly uses a biasing element to secure bearing elements within the housing.

Reducing nickel in copper-tin bearings resolves hardness versus adaptability contradictions, enabling reliable high-speed operation.

Connecting stubs route lubricants through intermediate spaces between base walls to reduce wear on connecting rod bearings.

An insert with high lubricity in the connecting rod bushing prevents seizure during startup after prolonged idle periods.

Segmented oil grooves manage lubricant flow to prevent temperature increases and galling in cylindrical bearings.

Intermittent oil delivery via wristpin passages reduces parasitic drag and pumping work in two-stroke engines while maintaining adequate lubrication.

Controller detects compression ratio deviations and repeatedly activates the adjustment device to ensure reliable switchover at high rotational speeds.

An aluminum-tin interlayer prevents tin precipitates from disrupting the sliding lacquer, resolving adhesion failure and bulging under high engine loads.

Lubricating oil bores in the connecting rod bearing eye and eccentric establish an oil film to reduce wear at contact points during adjustment.

Removing zinc from the spray powder prevents brittle FeSn2 intermetallic formation while maintaining metallurgical bonding and ductility.

Segmented circumferential grooves divert contaminants into axial channels, preventing dispersion across the sliding surface and reducing bearing damage.

Machining upset portions of the connecting rod and bearing cap creates a step-free surface that prevents cylinder interference while suppressing fretting wear.

Axial grooves on connecting rod bearing slide surfaces manage lubricant distribution to maintain stable oil pressure during high-speed crankshaft rotation.

Circumferential grooves in the recess surface direct oil along the shaft rotation path, reducing turbulence and maintaining pressure.

Semi-annular thrust bearings with asymmetrical reliefs retain lubrication oil at sliding surfaces to prevent crankshaft seizure.

Asymmetric load transfer offsets in rocking journal bearings maintain adequate oil film thickness during peak combustion pressure, reducing friction and wear.

A hydrodynamic bearing uses controlled surface roughness to accelerate crankshaft accommodation during engine run-in.