Internal Combustion Piston Engines TRIZ Cases

A two-part coaxial connector keeps the inner hose visible and separate, making rigid inner and outer hose assembly easier and safer.

A spherical snap-fit hinge joins tubular components while absorbing angular and assembly tolerances to reduce leakage and stress.

A pointed pivoting valve redirects exhaust around the turbocharger to cut backpressure and maintain engine efficiency at high altitude.

Exhaust-driven turbocharging lets a gasoline welder generator maintain strong torque with lower fuel cost, noise, and emissions than diesel.

Higher oleophobicity at the outer thrust-bearing surface cuts oil side flow and friction while preserving oil film load capacity.

Waste exhaust heat is stored in a thermal battery and routed through a coolant loop to keep rear axle lubrication oil warm for lower friction and wear.

A gastight pass-through and connection element lets a heat conductor warm the mixer early, improving urea evaporation without damaging the conductor.

A gas-tight heater feedthrough places heat inside the exhaust path to improve reactant evaporation for SCR startup while protecting the conductor.

Welded nuts and turnbuckle joints lock the adjusted rod length in a turbocharger, preventing unauthorized readjustment without extra parts.

A dual-passage rotor raises exhaust temperature for aftertreatment at low load while limiting back pressure and fuel consumption.

An offset spring support in the turbocharger wastegate stabilizes shaft preload, reducing wear, contact force, and vibration-driven failure.

Separate vane shafts inserted into a bored nozzle ring enable precise angle changes without new mold tooling, cutting turbocharger vane-ring redesign cost.

A pressure-responsive flap valve limits airflow across condensate at low load, reducing charge-air cooler water induction and engine misfire.

A piston-controlled cylinder port lets exhaust escape by inertia and fresh air enter without backflow, improving filling and thermal load.

Piston position feedback adjusts cylinder oil supply timing and amount, keeping lubrication consistent as engine compression ratio changes.

A bonded PES or PPS inner layer with a PA or PPA outer layer helps DEF tubing resist superheated ammonia, heat, and brittleness.

A bypass flow restriction slows a baler rear gate near critical motion phases, preventing slamming while maintaining smooth bale discharge.

A ramped adjustable ring shim sets traction drive preload during assembly, compensating for part variation to reduce slipping and improve torque transfer.

Temperature and pressure feedback control gas uptake into a solvent to maintain saturation and prevent bubble release during effluent discharge.

Separate heating and fluid passageways keep fuel hoses and nozzles from freezing while avoiding bulky external heater cabinets.

An interference-fit bolt in a plastic actuator housing prevents transverse movement, cuts bushing cost, and keeps turbocharger mounting precise.

A variable-speed carrier in an epicyclic gear train keeps engine output regulated across changing turbocharger turbine speeds.

A three-way rotary valve fully bypasses the turbine during cold start while reducing leakage, pressure loss, and double-valve complexity.

Mixed Cu, CuNi, and NiCr braid wires enable precise resistance tuning in compact heated media lines while maintaining tensile strength.

Heated air routed through a separate hose passageway warms fuel near the nozzle to prevent freezing, clogging, and bulky dispenser heating.

A pre-biased spring between the lever and valve closing element damps vibration in multi-scroll turbines to cut wear, noise, and sealing loss.

Traffic light prediction lets the vehicle switch the electric oil pump only when hydraulic pressure is needed, cutting battery drain during ISG stops.

Masking sealed pipe joints and shell openings before cutting keeps chips out of double-shell turbine housings and preserves tip-clearance accuracy.

Undulated annular surfaces replace crank and piston-rod linkages to cut vibration, friction, and wear while enabling dwell at TDC and BDC.

A dual-volute valve layout reduces exhaust-driven wear by shaping the valve member and shielding the biasing member inside the valve interior.

A front-rear deck layout places the hose reel ahead of the urea tank to keep deck width compact while easing refilling and reel access.

A raised step in piston valve pockets slows combustion gas toward the cylinder liner, helping preserve the oil film and reduce heat transfer.

A preloaded spring and external centering stop keep the wastegate flap aligned, reducing jamming, noise, wear, and sealing loss.

A tight shaft-hole clearance keeps the clasp off the attachment tongue, cutting reaction force, chattering, and durability loss in turbocharger waste gate valves.

Integrated heating in the DEF hose, adapter, and nozzle keeps fluid flowable below 12°F to avoid cold-weather dispensing interruptions.

A detachable sensor fixing assembly separates the sensor from the solenoid valve for easier installation, fault diagnosis, and lower replacement cost.

A carbon-fiber electric immersion heater thaws frozen DEF faster than coolant coils while simplifying SCR tank heating and control.

Stamped valve body and integrated sealing features cut exhaust valve weight, cost, and assembly complexity while maintaining leak control.

High-pressure gas injection into the upstream intake passage suppresses low-flow compressor surge and widens stable turbocharger operation.

Perpendicular flap seating on valve seat surfaces improves end-position sealing, cuts leakage, and keeps engine gas flow resistance low.

Bearing-gap contouring creates lubricant pressure peaks that counter alternating radial shaft loads and preserve hydrodynamic lubrication.

A vented alignment sleeve relieves dead-space pressure, prevents gas mixing, and reduces piston wear in natural gas compression engines.

An uneven support surface protects the spring element in a turbocharger bypass valve, reducing vibration, noise, wear, and pretension loss.

Converts biogas sulfur compounds to H2S, then removes them in regenerable high-temperature beds to cut corrosion and adsorbent waste.

An angle-driven tool holder machines inner housing surfaces through an opening with higher accuracy, better finish, and lower contact risk.

A spherical lever-to-valve joint with conical seating cuts wear and leakage in turbocharger wastegate valve assemblies.

A conductive woven hose with series crimp connectors enables adjustable resistance heating to keep automotive urea solution from freezing.

Hydrostatic bearing fluid, pivot pads, and a pressure-adapting plunger cut vane friction and wear without contaminating the process fluid.

Balanced Si, Cr, Mo, Ni, and low C+N improve brazing filler penetration while resisting condensed-water corrosion in EGR coolers.

A movable scroll passage plate with spring support accommodates thermal expansion, cuts heat transfer, and helps maintain exhaust temperature for earlier catalyst activation.