Piston Rings TRIZ Cases

Composite piston ring coatings use layered carbon and PVD structures to resolve the trade-off between low friction and durable wear resistance.

Cr/CrN/Si-DLC composite layers resolve the durability-friction trade-off in high-temperature engine operation.

A piston ring coating with a gradient sp2/sp3 ratio resolves bi-metallic effects by matching elastic modulus, reducing wear.

A master cylinder seal groove uses a chamfer and reduced lip section to facilitate detachment during replenishment.

A steel material composition with controlled silicon and boron content enhances wear resistance in engine components.

Modular replaceable piston sleeves allow targeted component repair and eliminate full block replacement waste.

Rounded scraping edge radius of 0.02 to 0.2 mm reduces wear on counter surfaces while maintaining effective oil scraping performance.

Spheroidal cementite dispersed in a tempered martensite matrix maintains spring force at 300°C while achieving high thermal conductivity.

Segmented spacer expander grooves facilitate oil flow through enlarged through holes to prevent side rail freeze up from carbon deposits.

A piston expander transfer valve assembly meters high pressure gas using internal pressure differentials.

A piston ring with a varying apex line generates hydrodynamic pressures to redistribute lubricating oil across the running surface.

Contoured flank depressions filled with soft materials reduce wear and blow-by values in internal combustion engines.

Segmented seal bodies accommodate thermal expansion and control surface movements while maintaining structural stiffness against fluid loading.

Composite damping rings reduce wear on titanium aircraft shock struts.

Obliquely curved lugs and grooves on a metal sheet create mechanical interlocks that eliminate adhesive shrinkage gaps during plastic insert molding.

Press-fit cylindrical member protects radial shaft seals from spline damage while allowing lubricant flow.

Single-step electrolytic deposition embeds particles in cracks, eliminating double coating complexity.

A Mn-Cr steel piston ring transfers heat to the cylinder bore through optimized carbon and silicon composition.

A header ring uses an annular undercut to wipe plunger walls and form a durable seal in downhole packing sets.

Projection features on the piston ring feeder trap split ends, preventing overlap caused by whip lash effects.

A piston ring uses a tapered running surface with a PVD topcoat to form a defined land.

Segmented nitride and oxide layers on the flank surfaces resolve wear-corrosion trade-offs while a chromium solid particle layer protects the outer surface.

Locating discs with axial openings guide the piston coaxially to prevent leakage, resolving the trade-off between sliding freedom and precise alignment.

Localized nitriding prevents crack propagation while ion plated chromium nitride coating enhances durability against wear in high-speed diesel engines.