Piston Rings TRIZ Cases

An integral anti-rotation feature locks a gas turbine piston ring in its groove to stop spinning, protect sealed parts, and preserve the air seal.

An integral anti-rotation feature locks a gas turbine piston ring in its groove to stop spinning, limit wear, and protect sealed components.

A three-compression-ring and oil-ring layout cuts blow-by in diesel engines while limiting piston weight, friction, and ring strength loss.

A second scraper ring removes cylinder-wall condensate separately from oil, preventing fluid mixing, wear, and lubrication loss in alternative-fuel engines.

A non-loaded baffle ring, pressure passages, and a shielding wall block oil droplets from the cylinder to limit abnormal combustion.

A spacer expander with a lug W/H ratio of 1.5 or more cuts lug wear, limits rail shift, and preserves oil scraping at high engine speeds.

A four-compression-ring layout uses barrel and taper ring profiles to cut blowby and oil consumption without adding piston size or weight.

A groove and gas pocket balance radial forces in twin piston rings, reducing wear, fracture risk, and leakage without liquid lubricant.

An inclined sealing surface and self-centering ring joint cut leakage and pressure loss while accommodating wear and thermal expansion.

An axial overflow channel separates sealing from damping, keeping hydraulic cylinder end-position damping precise despite piston ring wear.

An asymmetric convex ring profile creates a wedge effect that preserves oil sealing while cutting piston ring friction and fuel loss.

Combining forged or cast piston crowns with additive lower sections preserves strength in hot zones while enabling lighter, complex cooling channels.

A graded sp2 profile in amorphous hard carbon film improves piston ring adhesion and wear resistance under high thermal and surface pressure.

Offset ring gaps and an elastic closing member block gas passages in the ring groove, improving piston ring sealing against blowby.

Groove openings let flame propagate into piston ring crevice volumes, cutting unburned hydrocarbons while preserving sealing effectiveness.

Replacing PTFE with UHMWPE in aliphatic polyketone improves weld line strength while preserving tribology for injection-molded seals.

A graded sp2-rich hard carbon film helps piston rings resist peeling and wear by improving coating adhesion under high heat and surface pressure.

A carbon-carbon split helical piston seal cuts centrifugal load and friction, helping gas turbine rotors seal effectively with less wear.

Axially preloaded sealing and piston rings improve dry twin-shaft rotary piston machine sealing while limiting wear, power loss, and space.

Specific Si/Cr and C/Si ratios in a Cr-Si-C undercoat stabilize DLC adhesion, preventing spontaneous degradation during high-speed deposition.

A three-compression-ring width layout cuts blow-by gas while limiting friction and piston weight in high-pressure spark ignition engines.

A curved, vertically symmetric side rail stabilizes oil control ring motion at high engine speeds to cut oil leakage and consumption.

A pressurized fluid cushion lets a perforated piston ring adjust diameter, maintaining sealing with minimal friction in high-temperature service.

Complementary piston sealing elements slide outward as they wear, maintaining compressor sealing capacity and extending service life.

Complementary sealing elements spread piston ring wear, preserve compressor sealing capacity, and signal replacement timing with a check hole.

Integrated discharge flow paths and solid lubrication pull sealing-ring particles into suction, keeping air cylinders clean in substrate tools.

Oxide glaze layers and cobalt-based coatings cut friction and wear on mid-turbine frame piston seal rings under heat and vibration.

Oil pockets and shifted contact regions help piston rings preserve cylinder-wall lubrication and sealing during direct water injection.

Alternating CrAlN and Cr(Al)N periodic layers help sliding members resist wear, spalling, scuffing, and oxidation while absorbing stress.

A Cr-B-Ti-V-(Mn, Mo)-N coating balances low friction, wear resistance, and toughness to resist cracking and peeling in severe engine use.

Openings between the piston face and ring groove let combustion reach crevice volumes, burning trapped fuel to cut hydrocarbon emissions.

A tuned outer-edge curvature near the ring gap lowers local surface pressure, reducing wear while preserving sealing and ring life.

Uneven annular gaps and recesses relieve gas pressure in the oil scraper ring while limiting oil entry into the combustion chamber.

Roughened end sections with CrN or DLC coating retain oil and distribute stress to reduce piston ring flaking and crazing.

A dual sealing ring layout limits combustion gas blowby while timing air and fuel conduit access in a circulating piston engine.

Offset stoppers lock piston rings against rotation, preserving lubrication, reducing friction, and limiting blowby gas leakage.

Alternating hard carbon layers with a softer surface improve adhesion, wear and chipping resistance, while lowering friction in high-load sliding parts.

A hydrogen-free ta-C coating on piston ring surfaces prevents groove sticking and wear while preserving ring movement and sealing efficiency.

Controlled carbide alloy steel gives oil ring wire high wear resistance and workability without costly plating or coating.

Cantilever beam springs preload segmented piston rings outward to maintain bore sealing, reduce wear, and prevent leakage under high acceleration.

Controlled sp3, D, G, and S band ratios in a DLC coating reduce microfractures and abrasive wear from carbon sludge on sliding surfaces.

Controlled sulfur crosslinking with fatty acid amide and fine carbon black improves seal sliding, strength, and abrasion resistance.

Parallel meander spring legs enter the lamella joint with defined play to block oil flow into the combustion chamber and cut particle emissions.

A stepped oil return hole in the piston ring land improves oil drainage, cuts oil consumption, and reduces burr-prone machining.

A staged powder bed fusion process joins a cast iron ring carrier to an aluminum piston to improve wear resistance with less heat impact.

Controlled DLC hardness and Raman ID/IG help piston rings resist wear on cylinder bores, including iron-based thermal spray surfaces.

An overlapping lamella joint with a reduced-height meander spring blocks blow-by gas and oil passage, cutting oil carryover and particle emissions.

A balloon damper and smoothing mechanism help a dual-action irrigation pump suppress pulsating flow, cut electrical noise, and keep sealing low cost.

Selective nitriding leaves the lower edge and chamfer untreated, preserving piston ring flexibility while maintaining oil scraping and wear resistance.

A deflectable annular lip seals the chamber wall and end face to stop pressure-driven seal extrusion and leakage in lubricant injectors.