Silencing Apparatus TRIZ Cases

High emissivity insulation on a riding lawn mower muffler reduces exterior temperature to prevent ignition of dry cut material.

Widening the flow cross section reduces vortex formation and gas exchange, enabling shorter connection sections while maintaining thermal decoupling.

Replacing coated stainless steel with a composite structure eliminates coating peeling and discoloration while reducing weight.

Circumferential mixing apertures in a supply pipe disperse heated burner flow to rapidly heat the catalytic converter while minimizing exhaust backpressure.

Flat-surfaced elongated housing reduces radial size to fit transmission return modules while maintaining internal volume through longitudinal extension.

Integrated collars and tabs join muffler half-shells, eliminating separate fasteners that increase complexity.

A flexible conduit outer ring connects to an inner fixing member and exhaust component using two distinct welds for secure assembly.

A diffuser box disperses exhaust gases through a meshed grill to prevent localized hot spots near the truck cab.

Nested inner and outer pipes with recessed weld zones prevent back bead interference, improving heat retention and catalyst activation.

Needle punching forms closed-loop fiber bundles at protrusion marks, preventing detachment from exhaust gas erosion while maintaining noise reduction.

A heat resistant spheroidal graphite cast iron alloy uses barium to facilitate graphite nucleation.

Selective hollow layers on long branch channels retain exhaust heat for rapid catalyst activation while preventing overheating in shorter channels.

A compact exhaust muffler integrates two Helmholtz resonators within a single pipe to expand the muffling spectrum.

Curved outlet pipe directs exhaust gas below pannier, preventing thermal damage while maintaining compact muffler design.

A method draws a plate into a curved U-shape to form a half pipe for enclosing an inner pipe.

Merging two resonator chambers into a single body absorbs broadband noise while reducing back-pressure in engine exhaust systems.

Remote connection arms compress laterally to resist rotational forces, resolving the trade-off between vertical vibration damping and rotational rigidity.

Pre-formed tubular inorganic fiber bodies insert into double-pipe spaces, eliminating large blowing equipment and reducing manufacturing takt time.

An inset bead and clamping ring constrain longitudinal movement of the catalyst, maintaining sealing integrity while allowing service access.

Segmented baffles and filling materials reflect exhaust gas to lower noise while easing cleaning.

A dynamic exhaust purification system uses a bypass flow line to activate a secondary particulate filter during engine operation.

Integrating a metal reinforcing element into the plastic cover prevents thermal deformation, ensuring consistent sensor positioning.

An exhaust device uses an expansion space to create backflow that increases catalyst contact frequency.

A muffler design with crossed intermediate tubes separates exhaust streams to minimize interaction and reduce noise.

Strategic joint placement in low-temperature zones prevents brazed area damage from nonuniform thermal strain while maintaining exhaust gas flow efficiency.

Dual suspension openings in a resilient exhaust hanger accommodate varying rod sizes, reducing inventory complexity and manufacturing costs.

An intermediate pipe redirects exhaust gas to bypass baffles, reducing booming noise while sound-absorbing materials protect the housing from thermal damage.

Direct mounting system eliminates upper brackets and fasteners, reducing manufacturing costs and carbon usage while maintaining vibration isolation.

A V-type engine exhaust pipe silencer uses expansion paths with varying capacities tailored to individual cylinders.

A muffler baffle assembly directs exhaust gases through four passes in multiple chambers to dampen noise emissions.

A fibrous mat uses a wrapped containment sleeve to provide acoustic and thermal insulation without chemical binders.

Four-point mounting frame stabilizes exhaust post-treatment device, preventing hydraulic oil adhesion and improving treatment efficiency.

Clearance between the support and cover accommodates thermal expansion loads, preventing mechanical stress and premature wear.

A lateral opening in the housing allows a second exhaust-gas treatment unit to project inward, creating a compact nested configuration.

Ferritic cast steel with controlled eutectic phase composition enhances melt flowability for complex exhaust system components.

A unified muffler structure merges the bypass pipe into the main casing to eliminate differential thermal stress while preserving high-frequency engine sound.

Lateral movement of the mount plate allows the retention band to tighten around the DOC housing, reducing assembly time in tight under-hood spaces.

Adding nickel, aluminum, vanadium, niobium, and cerium to spheroidal graphite cast iron prevents cracking above 800°C while maintaining fluidity.

A muffler deflection device converts axial flow into radial flow through filter material to enhance noise absorption.

An exhaust enclosure system uses an inner insulation assembly and a cover separated by a circumferential air gap to reduce heat transfer.

Corona discharge agglomerates carbon particles in exhaust streams, eliminating mechanical filter clogging and back pressure issues.

Additive tank positioned between floor panel and cross member shields diesel particulate filter additive from splashing stones and collision damage.

Aligned baffles in the muffler body establish a straight central chamber route, resolving exhaust flow restriction and enhancing engine performance.

Stiffening ribs reinforce exhaust manifold walls at stress points to mitigate heat fatigue and prevent cracks caused by thermal expansion.

Segmenting the muffler shell into thin corrugated sheets with a dense dampening core increases resonance frequency and lowers vibration radiation.

Curved flow paths guide exhaust gas through a catalyst while a muffler chamber maintains temperature to reduce volume.

An intermediary duplex material reduces thermal fatigue cracking between ferritic and austenitic exhaust components by equalizing expansion stresses.

Offset openings extend the flow path and dwelling time of the mixture, resolving poor intermixing in cooling devices.

Corrugated panels integrate directly into housing walls to absorb pulsation loads, eliminating complex reinforcement assembly.