Silencing Apparatus TRIZ Cases

Nested tubes in a muffler equalize exhaust path lengths, reducing half engine order noise by 15-25 decibels across engine speed ranges.

A common housing merges exhaust purification chambers and muffler sections to reduce installation space.

Segmented honeycomb structures divert fluid flow radially outward to boost wall-side speed, resolving throughput limits in exothermic catalytic processes.

Segmented collectors equalize pressure across cylinder banks, resolving efficiency losses and noise caused by unequal flow in traditional crossover pipes.

Interconnected ducts with leakage apertures diffuse engine noise uniformly, while a diaphragm blocks airflow contamination.

An external evacuation duct preserves acoustic reflection while enabling compact hybrid vehicle integration.

A connection pipe integrates a coolant channel to transfer heat from exhaust gases while maintaining acoustic transmission paths.

An oblique perforated plate directs exhaust gases toward the catalytic converter substrate to improve flow uniformity.

Silencer member segments air discharge path into resonance chambers and passages, suppressing exhaust noise while maintaining simple device structure.

Integrating exhaust pipes as housing walls reduces tunnel enlargement and manufacturing costs while maintaining noise dampening.

A plug-in tailpipe connection attaches exhaust pipes to a muffler support plate through a housing recess.

Segmented muffler chambers with tailored communication pipes tune exhaust noise while maintaining compact packaging space.

Integral teeth on a heat shield engage vehicle component windows to eliminate assembly complexity and tool requirements while maintaining secure attachment.

A urea solution mixing chamber uses impactors and vaporization fins to atomize and evaporate the liquid.

A saddle-type vehicle muffler structure integrates a center pipe and tail pipe within a reduced diameter portion to diffuse exhaust gas efficiently.

Bent opening edge region creates a press fit connection with the exhaust pipe, preventing relative movements that cause impact noises.

Ferritic stainless steel cast iron uses specific alloying elements to enhance thermal fatigue resistance and oxidation stability.

Convex intermediate wall distributes catalytic converter weight to maintain natural frequency and prevent resonance damage in single-cylinder diesel engines.

Varying diameters and radii in the bend portion reduce low-frequency sound attenuation while minimizing flow noise.

Vibrating elongated members cancel drone and popping noises without increasing back pressure.

Segmented curved elements assemble into a helicoid surface that reduces sound propagation while minimizing flow impedance.

Branching portions stir exhaust gas to provide accurate oxygen data, reducing catalyst size needs.

Segmented mesh portions scatter high-pressure exhaust gas, protecting fiber cotton from thermal damage while reducing noise.

A connecting pipe routes exhaust flow between front and rear cylinders through the vertical space between the rear exhaust pipe and catalyst device.

A motorcycle muffler uses a lateral inlet to increase the cross-section ratio of the expansion chamber for efficient noise reduction.

Exhaust pipe uses vertical dimensioning and curved pathways to prevent vehicle width increase while improving engine output.

A straddle-type vehicle exhaust apparatus uses partition walls to create multiple expansion chambers for stepwise gas expansion.

Covering portions protect the internal metallic layer of a carbon fiber reinforced plastic silencer cylinder during acoustic absorbent refilling operations.

Open tubes phase-delay sound waves to suppress standing waves, improving emission characteristics without extensive absorbing materials.

A rotating turbine generates swirling gas flow through expansion chambers to reduce exhaust noise.

An exhaust gas system uses a damping device between the branch and control valve to adjust sound behavior while preventing resonance vibrations.

Conical volumes and a flexible diaphragm in this sound bypass device minimize transmission losses while preventing gas flow.