Silencing Apparatus TRIZ Cases

A silencer uses a nested pipe arrangement to create an exhaust gas bypass channel.

Segmented casing and shielding plates generate a double swirl that improves ammonia homogeneity, preventing urea deposition and blockages.

A spark arrestor uses a reverse flow channel to reduce exhaust gas velocity and improve sound attenuation within a compact cylindrical housing.

A U-turn exhaust passage reverses gas flow through a junction-mounted catalyst, eliminating parallel distribution issues and maintaining compact size.

Parallel oxidation catalysts in a segmented case reduce waste by allowing selective replacement of clogged units instead of discarding the entire assembly.

Optimized ferritic cast steel composition with controlled niobium carbide formation enhances room-temperature toughness for exhaust components.

A variable frequency Helmholtz resonator uses a control valve plate to adjust pipe geometry and tune muffling frequencies across engine speeds.

Oblique radial channels in a conical honeycomb body reduce exhaust pressure loss while maintaining structural integrity within limited installation spaces.

A vehicle muffler positions the main chamber ahead of the rear suspension to increase internal volume.

A flexible pipe assembly with a bellows section absorbs vibrational forces between vehicle components.

A motorcycle muffler uses resonator pipes of varying lengths and thicknesses to expand the frequency range of exhaust noise reduction.

Graduated exhaust holes reduce internal pressure to lower temperature without increasing work machine size.

Automated pneumatic deposition of continuous fiberglass rovings with liquid resin eliminates uneven density and powdered binder hazards in muffler inserts.

Segmented tailpipes with varying sub-pipe dimensions create a gradual velocity gradient that mitigates high-speed exhaust gas noise.

A muffler design uses a perforated resistance plate to restrict fluid flow between the exhaust passage and sound chamber.

Multi-section exhaust pipes with elastomer joints prevent oil soiling from uncombusted substances while plastic materials reduce hedge trimmer weight.

Interlocking outward extensions on catalyst element side walls eliminate separate sealing components, reducing fouling risks and assembly complexity.

Segmented tubes and diffusion brackets minimize engine efficiency losses while achieving effective noise reduction.

An active exhaust system replaces passive silencers with electronic components to reduce low frequency noise below 500 Hz without increasing backpressure.

Segmenting the muffler into three expansion chambers creates distinct exhaust paths that lower backpressure while absorbing noise across frequency bands.

Segmented low and high temperature catalyst substrates oxidize particulate matter to minimize active regeneration frequency and reduce diesel fuel consumption.

Sliding feet with low-friction coatings accommodate thermal expansion, reducing stress on fastening bolts that would otherwise loosen under vibration.

A plate with an opened portion creates reflection waves to cancel air column resonance in the exhaust pipe.

Segmented outer case pieces reduce radiated vibration sound while maintaining internal silencing capacity in saddle-riding vehicle exhaust systems.

An external heat sink reduces exhaust temperature and increases fuel efficiency by 5.6% to 21.01% while preventing corrosion via indirect thermal coupling.

Active noise cancellation systems detect adaptive filter divergence by analyzing coefficients and adjust leakage values to prevent noise boosting.

Acoustic passages in a resonator assembly attenuate noise while maintaining compaction efficiency.

Positioning the holding member outside the porous wall area reduces pressure loss and enhances noise reduction in the exhaust muffler.

Concentric silicone shells protect corrugated metallic couplers from gravel and sand damage while maintaining vibration absorption.

Prefabricated muffler inserts push into the jacket, allowing external welding of a closure plate to resolve transverse installation constraints.

Circular-line contact between raised spherical segments and a connecting pipe compensates for angular misalignments and axial offsets in exhaust lines.

External heating element preheats secondary gas fed into the exhaust inlet section, resolving cold start temperature control challenges.

Fiber molded insulation with metallic sheathing traps air in closed cavities to reduce thermal transfer.

Tangential swirl creates vortex flow that improves urea decomposition and NOx reduction efficiency.

A perforated cover mounts on a holder via form-locking engagement.

A silencer design integrates a multi-chamber resonator with an uninterrupted through-tube to guide exhaust gas flow efficiently.

Three-chamber mufflers with vented inlet tubes reduce exhaust noise while minimizing engine output loss from flow resistance.

Segmented exhaust housing parts detach via a clamp connection to expose internal purification units.

An integrated louver bridge structure in the exhaust pipe wall provides acoustic damping to suppress resonance frequencies without generating whistling sounds.

A compact muffler uses a spiral exhaust passage to maintain backpressure while reducing weight.

Segmented exhaust outlets increase boundary surface area to mix outside air with engine exhaust, lowering temperature without raising back pressure.

Nesting acoustic baffles within flexible convolutions reduces compressor noise while maintaining compact spacing between the discharge line and muffler.

Spiral fins in the tail pipe suppress discharge ripples that interfere with shock wave timing and reduce engine efficiency.

Segmented mounting of the inner pipe eliminates complex sliding seats, lowering manufacturing costs while maintaining thermal insulation.

A gas flow unit redirects exhaust through a chamber prolongation to achieve uniform flow distribution across cooler cross-sections.

Orthogonal noise attenuation passages in the aftertreatment module reduce exhaust back pressure and improve packaging complexity.

An overlapping exhaust pipe junction defines a secondary flow path to attenuate noise without adding discrete muffler components.