Piston Rings TRIZ Cases

Segmented single-piece oil control rings reduce tangential force by 50% to lower fuel consumption and CO2 emissions during engine run-in.

A vehicular brake apparatus generates a first hydraulic pressure higher than a second chamber to restrict sealing member movement.

Axially spaced annular seals on a movable piston prevent hydraulic and gear oil mixing, eliminating carryover caused by overlapping seal movement paths.

Recessed bearing surfaces trap lubricant to maintain hydrodynamic film thickness, preventing friction loss at stroke extremes.

Hard amorphous carbon coatings on piston rings use controlled sp2/sp3 ratios and roughness profiles to minimize wear and cylinder liner scoring under high load.

Corrugated bellows packing seals the rod periphery to prevent water and dust ingress while accommodating axial movement.

Amorphous hard carbon film slides against counterpart members via lubricant to reduce friction.

An asymmetric seal design stabilizes piston contact and prevents fluid leakage by resolving reliability complexity trade-offs.

A sliding assembly uses a PVD ceramic coating on the piston ring and variable cylinder liner roughness to reduce friction losses.

A piston ring features a protruding structure covered by an anti-wear layer to indicate remaining thickness.

A master cylinder unit uses a communication path to connect the master cylinder and stroke simulator for hydraulic fluid flow.

Alternating CrN and CrCN layers suppress crack propagation in piston ring coatings, resolving peeling resistance issues under high thermal loads.

An integrated hydraulic return damper damps piston return movement to prevent hard impact against the stop and ensure accurate sensor recognition.

A molded plastic primary piston with an overmolded metal insert and surface grooves reduces brake fluid pressure fluctuations.

An iron nitride matrix with iron sulphide inclusions reduces scuffing on piston rings where thin oil films cause severe contact.

Outer piston ring with larger external radius simplifies assembly and removal of compressor-side shaft seals.

Optimized carbon and silicon levels in martensitic gray cast iron improve machinability while maintaining wear resistance for complex piston ring designs.

An oblique ring groove shifts the sealing point inward, preventing hot gas leakage under the piston ring during thermal expansion.

Slanted rear walls on piston indentations reduce collision angles with second communication holes, preventing sealing member damage.

A segmented wear ring with circumferentially offset gaps and arc-shaped recesses adapts to piston bore irregularities.

Multi-piece cage design preloads resetting springs during assembly, eliminating buckling risks and reducing process complexity in vehicle brake supply devices.

A piston seal with cutout grooves guides brake fluid through a gap between the outer lip and groove bottom.

Differential hardness creates a wedge-shaped recess that guides cylinder oil and prevents scuffing.

Angled oil drainage ports convey lubricant from between ridges without compromising the gas and oil seal.