Piston Rings TRIZ Cases

Low-sulfur carbon-filled PEEK or thermoplastic polyimide rings cut sulfur carryover in hydrogen compressors while maintaining wear resistance.

An inclined undercut surface guides scraped oil toward the crank chamber, limiting oil entry into the ring groove and reducing consumption.

An asymmetric trapezoidal boss-and-groove opening keeps a single-side seal despite size variation, reducing blowby and engine oil consumption.

A dual hard chromium coating uses widened particle-free cracks as lubricant reservoirs to shorten piston ring running-in and cut oil use.

A symmetric arcuate rail profile maintains oil scraping and oil film formation while simplifying manufacture and preventing reverse assembly.

Polished inclined faces on a PVD-coated oil ring rail cut sliding resistance while preserving abrasion resistance and improving fuel consumption.

A piston seal and pressure-driven chamber isolate leaked driving fluid from medication while improving injection uniformity and dose control.

Pre-formed protruding surfaces create a sharp corner before polishing, giving piston rings a small uniform contact width without harming oil scrape-off.

Overlapping ring ends with sacrificial wear elements maintain a gas-tight seal under thermal expansion while reducing abrasive wear and delamination.

A DLC running surface with chromium-coated flanks cuts wear and friction while lowering coating cost and easing manufacture.

A threaded nut-retained side plate eases thermal expansion, cuts wear and oil consumption, and protects rotary engine sealing surfaces.

A curved inner tip with an R1/h0 ratio of 0.7-1.1 stabilizes the side rail at high engine speeds to suppress oil leakage and consumption.

A separate top land member lets piston rings fit before final assembly, avoiding ring expansion stress, deformation, and breakage.

A tailored alloy steel oil ring wire enables nitrided side rails with high hardness, wear resistance, and lower cost than stainless steel.

A lightweight core with a nickel or cobalt shell lowers rotor borefoot contact stress and wear while preserving gas turbine sealing reliability.

Alternating DLC and metal-doped DLC layers reduce residual stress and peeling in piston rings while maintaining low friction and high wear resistance.

A PVD chromium nitride running layer and galvanic chromium flank layer cut piston ring wear and friction while lowering coating cost.

Offset annular ring gaps create a labyrinth seal that limits hydrogen blow-by and oil carryover, improving engine safety and efficiency.

A cover element seals the piston ring gap to limit hydrogen blow-by and oil leakage while staying stable at high engine speeds.

A cover element bridges the piston ring gap and locks onto end protrusions to cut hydrogen blow-by and oil leakage at high engine speeds.

A dedicated condensation scraper ring removes water from the cylinder wall, preventing oil mixing, wear, and engine damage.

An inclined, self-centering joint lets piston ring ends adapt to thermal expansion and wear while maintaining near-complete sealing.

A centered piston pin and larger mid-bore diameter cut piston skirt friction while preserving the expansion period and work efficiency.

A variable pressure-relief chamfer changes contact surface height around the ring to balance radial pressure, preserve oil film, and cut wear.

An inclined notch surface on the piston ring redirects scraped oil away from the ring groove to cut engine oil consumption.

A multilayer DLC coating with metal interlayers and gradient layers improves piston ring wear resistance, lowers friction, and prevents groove adhesion.

Tabular alumina with a controlled acid/base adsorption ratio improves trivalent chrome plating adhesion, hardness, and wear resistance.

A segmented barrel profile cuts piston-ring friction in cold, high-viscosity oil while preserving oil film stability and airtight sealing.

A three-compression-ring and oil-ring layout cuts blow-by gas while limiting friction and piston weight through tuned ring tension and geometry.

Controlled PVD tuning of Si-N film composition, grain size, and stress helps piston rings resist wear, cracks, and peeling.

A dual-action disposable pump uses silicone O-rings, damping, and smoothing elements to cut fluid pulsations and electrical noise.

A dual hard chromium coating uses a particle-free cracked top layer to shorten piston ring run-in and reduce oil consumption.

Window-hole and web geometry speed oil discharge from the land space, preventing deposits that degrade scraping and can stick the ring.

Different upper and lower side-face angles reduce piston ring wear, blow-by, and oil consumption while simplifying chamfer-free manufacture.

A variable taper profile shortens the overlap-region taper to limit gas leakage while preserving pressure cancellation and ring life.

A layered DLC coating uses a hard carbon-rich base and softer outer amorphous layer to cut run-in wear, smoothing cost, and counterbody damage.

A controlled coating thermal resistance on the piston ring cuts blow-by gas by moderating expansion and limiting heat deformation.

By varying contact surface height around the ring, radial pressure is balanced to preserve oil film thickness and reduce wear.

Rotation-restricted stacked rings keep the high-pressure protrusion centered, reducing stress concentration, fatigue failure, and leakage.

A separate condensation scraper ring removes cylinder-wall water before it mixes with oil, reducing wear in alternative-fuel engines.

Ceramic sleeves and fixed piston rings replace heavier WC wear surfaces, maintaining pump durability while cutting aerospace pump weight.

Ceramic sleeves and fixed piston rings replace dense tungsten carbide parts to preserve pump wear resistance while reducing aerospace pump weight.

A nested second piston and smaller stopper cylinder resist high pressure near stroke end positions, improving cylinder durability.

Curved ring surfaces and a narrow flat intermediate section create wedge spaces that cut startup friction while limiting oil consumption.

A graded transition layer between hard wear coating and soft running-in material prevents thermal overload, scuffing, and flaking in piston rings.

A removable piston head creates an annular groove for rigid ceramic or carbide rings, cutting leakage while improving wear resistance.

Overlapping butt ends with shifting wear elements maintain a gas-tight compression ring seal while limiting abrasive wear and thermal expansion damage.

Offset ring gaps separated by a spacer block combustion gas flow, cutting blowby while allowing larger thermal-expansion gaps.

Alternating MoN/CrN layers and substrate nitriding improve coating adhesion and stop ring-shaped fractures under high load.

A dual-layer porous coating helps piston rings seal quickly during break-in while reducing blow-by, oil consumption, and wear.