Silencing Apparatus TRIZ Cases

See how a refrigerant-flooded pipeline acts as a lambda/4 resonator to dampen low-frequency com

See how a silencer baffle with variable-curvature transition sections minimizes flow resistance

See how a buffer cavity absorbs exhaust vibration to prevent screech resonance, expanding the i

See how a muffler with variable perforation rates and sound-absorbing material reduces refriger

A variable-length exhaust pipe with flexible hoses and drive shafts maintains leak-free transfer across articulated steering while reducing wear.

Upstream water separation and guided backflow dehumidify fuel cell exhaust gas, preserving silencer noise reduction in a compact layout.

Modular plastic casing and interchangeable end pieces simplify fuel-cell sound damper adaptation while keeping joints stable and gas-tight.

A dual-channel silencer splits cooler airflow through curved guided outlets and damping walls to cut sound pressure while preserving heat dissipation.

A ceramic-insulated feedthrough with outer touch protection shields exhaust heater connections from fluids, corrosion, and short circuits.

Blind holes through an inorganic surface layer boost 800-2000 Hz sound absorption while preserving shape above 400°C.

A telescopic pipe with cardan shafts and flexible hoses transfers exhaust across an articulated joint while reducing wear, leakage, and maintenance.

An angled two-conduit exhaust stack with an oblong exit port improves treated gas velocity, plume spread, and sound control while reducing turbulence.

A downstream absorber chamber cuts pneumatic brake silencer noise below strict vehicle limits while keeping airflow disturbance minimal.

Placing the gas sensor on the engine side of the exhaust passage shields it from debris and uses engine heat for faster activation.

An inorganic thermo-acoustic barrier shields vehicle exhaust heat while preserving sound absorption and avoiding smoke and odor at high temperatures.

A resonator insert nested inside an air duct cuts intake noise without extra installation space, using chambered disks and snap-fit alignment.

Mechanical fasteners lock exhaust insulation to the sheathing shell, preventing displacement without adhesives and lowering manufacturing cost.

U-shaped fasteners lock insulation to an exhaust cover shell without adhesives, simplifying assembly while keeping the insulation stable.

A silencer nested inside the union bolt uses a mounting or resonance chamber to cut pulsating fluid pressure noise without sacrificing compact assembly.

A capped sensor opening and smaller pipe projection simplify silencer assembly, reducing misalignment, interference, and leakage.

A cap joined to the shell and pipe projection lets the sensor port tolerate misalignment, simplify silencer assembly, and block exhaust leakage.

An acoustic damper in the brake dust suction line cuts operating noise while preserving particle capture and brake cooling airflow.

Overlapped exhaust pipes are radially deformed to create a pressed, leak-resistant joint that avoids welding, clamps, and complex assembly.

Curved plates and frustoconical coupling tubes replace multiple 360-degree welds, cutting exhaust crossover assembly cost and time.

Radial crimping joins thin-wall exhaust pipes without welding or clamps, creating a secure mechanical lock with leak-resistant sealing.

Curved end walls and clamped pipe sealing cut muffler weight and welding complexity while preserving compressive strength and acoustic damping.

A rotatable spoon-shaped valve smooths dual-outlet exhaust flow to cut turbulence, power loss, and unwanted sound emissions.

A non-circular cam and sliding arm extend the engine power stroke, improving motion conversion efficiency while reducing vibration.

Movable jaw segments with prestressing distribute compression around tubular metal parts, reducing folds, weight, and shape distortion.

Throughflow openings in a meandering exhaust gas heating conductor cut counter pressure while expanding heat transfer area and gas heating efficiency.

Flow-through openings in a meandering exhaust heating conductor cut back pressure while increasing heat transfer to passing exhaust gas.

A spoon-shaped valve in a Y-shaped exhaust housing splits flow between outlets to cut vortices, backflow, sound issues, and power loss.

A baffle-mounted rotating valve plate stays in contact to cut exhaust valve vibration noise while replacing heavy torsion springs with a coil spring.

A perforated member creates a controlled air evacuation path during muffler filling, enabling even fibrous material density and sound attenuation.

Pressure pulses from aircraft gear pumps are damped by a perforated tube and cushion-filled chamber, reducing fatigue and sensor error.

Sparsely arranged two-sided Helmholtz cells absorb broadband fan noise while keeping air flow paths open for circulation devices.

Hidden spring elements let the tail pipe slide onto the exhaust pipe for secure alignment without clamps, extra fasteners, or visible hardware.

A rotating expandable forming head creates a smooth, leak-tight muffler collar on highly curved shells while reducing cracks, deformation, and burrs.

A perforated insert evacuates air during muffler filling, retaining fibrous material for uniform density and sound attenuation.

A Cr-Sn alloyed thickened pipe end with a defined gap relation improves crevice salt corrosion resistance and helps prevent leakage.

Controlled V, Al, C, and N precipitation hardening gives ferritic clamp steel higher strength and elongation without losing corrosion resistance.

A perforated screen and reflective rings cut downstream valve and regulator noise while keeping flow restriction, size, and weight low.

Integrated filtering inside a Helmholtz-based hydraulic pulsation damper cuts installation space while enabling tunable noise reduction.

A spoon-shaped rotating valve guides exhaust gas between outlets with smoother flow, cutting vortices, power loss, and unwanted sound.

An external coiled mass damper on the exhaust valve shaft suppresses resonance, valve flutter, and noise while keeping manufacture simpler.

Adjusted Fe-Cr-Al foil chemistry improves continuous tandem rolling toughness while preserving oxidation resistance and shape stability up to 900°C.

A perforated member and vacuum path evacuate air during muffler filling, preventing fiber disruption and preserving sound attenuation.

Adjustable collars and a replacement transport tube reconnect removed exhaust pipe sections with a gas-impermeable seal.

Inclined wall-mounted transducers and absorbent material cut hood noise while keeping the central extraction conduit clear and cleaner.

A ceramic mat fully fills the honeycomb-to-casing cavity to stop coating detachment, suppress convection, and preserve exhaust thermal insulation.

An elongated compensating pipe opening lets exhaust pipes self-align during silencer assembly while preserving stable joints and sound attenuation.

A multi-particle ceramic cement skin with binder and fibers helps honeycombs resist drying cracks and thermal shock.

Adjustable insert diameter and length tune exhaust sound pressure and frequency without adding complex resonators or raising cost.

Parallel exhaust paths switch when a secondary filter clogs, limiting pressure loss and noise while sustaining particulate removal.

A muffler uses a partition wall to segment the conduit into upstream outflow and downstream inflow sections for exhaust noise reduction.

Variable cross-sectional casing design increases internal volume for sound absorbing material in motorcycle exhaust systems.

A common muffler unifies exhaust gas flows from left and right engine tracts into a single cleaning device.