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.

Variable intake valve timing via hydraulic actuation resolves compression ratio conflicts between diesel and LNG combustion modes.

Feedback control adjusts reductant dosing based on ammonia and NOx levels to handle unmeasured disturbances in SCR systems.

A processing unit ascertains local conversion capability at multiple locations within a catalytic converter based on measured temperature.

A combustion engine fresh gas line directs high-velocity pulses via a nozzle to increase turbulence while avoiding complex apparatus integration.

A reducing agent storage method for exhaust gas cleaning systems that distributes reductant during shutdown periods.

A partition plate valve structure incorporates a stepped surface and measurement groove to facilitate clearance verification.

An on-off valve switches flow between a honeycomb core and bypass path, reducing pressure loss while maintaining heat recovery.

A muffler arrangement adjusts exhaust volume using vehicle and engine speed signals to control noise emission levels.

A secondary air system branches intake air at two compressor points to inject gas into the exhaust tract.

A reductant pump draws ambient air for purging via a control assembly managing fluid paths.

A movable filter assembly shifts position under ice pressure to create a bypass path for frozen reagent.

Segmented exhaust flow directs concentrated methane to a compact off-engine catalyst, resolving low concentration bottlenecks.

An exhaust pipe branch diverts hot gas to a heat exchanging apparatus that rapidly melts frozen Diesel Emissions Fluid while preventing decomposition.

Embedding a heating element within existing thermal shielding reduces installation complexity and weight while maintaining optimal operating temperatures.

A segmented exhaust assembly uses dual venturi members to draw ambient air into the gas stream for rapid thermal reduction.

A catalytic wall-flow monolith integrates a three-way catalyst with an oxygen storage component to treat exhaust gases.

Segmented SCR components with dynamic ammonia loading control increase total efficiency while preventing slip.

Coaxial metering solenoids actuate nested fluid members to control sequential flow, ensuring complete vaporization before ignition.

A bypass conduit with an exhaust pressure governor manages backpressure while a variable geometry turbine handles normal flow, resolving complexity trade-offs.

Segmented explosion chambers in the power wheel prevent waste gas mixing, ensuring complete combustion and high-efficiency kinetic energy output.

Tantalum polyoxometalate lowers light-off temperatures in three-way catalysts, resolving cold start emission bottlenecks.

A dual SCR catalyst system manages ammonia fill levels by comparing component temperatures against defined thresholds to control reducing agent dosage.

Segmenting the cylinder into varied air-fuel zones stabilizes mixtures against flow fluctuations, reducing unburned fuel loss.

An asymmetric pent-roof piston crown positions the ridge line on the intake side to unblock airflow, resolving intake efficiency limits in four-valve engines.

A two-stage turbocharger system segments exhaust flow to drive compressors independently, enabling higher exhaust gas recirculation rates without an intake throttle valve.

Integrated intake housing positions charge-air cooler above cylinder head to reduce pressure loss from air flow deflections.

A dual fuel injection valve uses a keying member to fix the outer needle orientation and maintain a constant interlace angle between concentric orifices.

A pump column baffle enables rapid in-tank access to submerged LNG pumps without draining the cryogenic storage vessel.

A rotating internal combustion engine uses a rotor with multiple pyramidal-shaped combustion chambers to achieve driven rotation via combustion pressure.

Replacing brushed contact starters with a brushless permanent magnet DC motor eliminates voltage drops and sequential actuation delays during engine restarts.

A multi-fuel co-injection system combines liquid and gaseous fuels under microprocessor control to enhance thermal content.

Optimizing yoke end width and magnet width ratios expands the timing advance range, increasing output power and startability.

An inorganic fiber retention material satisfies a specific pressure-density relationship to maintain retention power during repeated heating and cooling cycles.

Parking brake selector terminates brake autohold events without deactivating the mode, enabling creep torque and avoiding unintended acceleration.

A turbocharger separating tongue positions its end to create a controlled crosstalk cross-section upstream of the turbine impeller.

An independent second exhaust valve manages recirculation flow, eliminating the dedicated EGR valve to resolve complexity and reliability issues.

A pre-chamber combustion system injects air into fuel-rich mixtures to promote rapid combustion and produce synthesis gas.

A urea sender unit integrates an electrovalve and heat exchange pipe within a single housing to control fluid temperature.

Communication passage bypasses the exhaust valve body to eliminate gas stagnation, while an injector disperses residual flow for efficient discharge.

Segmented support distributes ice pressure to protect spring calibration, ensuring reliable dosing without complex robust designs.

A vehicle control device synthesizes driver operation amounts and automated targets to set a unified travel target value.

Compressed air hydrostatic bearings eliminate oil lubrication in turbochargers, reducing weight while avoiding contamination risks.

Segmenting nickel and platinum layers reduces cost while maintaining emission control efficiency.

Gutter rise portions deflect rainwater away from the engine compartment while exhaust vents release heat, preventing water ingress during stopped operation.

An annular gap design reduces oscillation risks by allowing dimensional variations while maintaining robust closure against pressure fluctuations.

Electrically heated surface elements accelerate urea solution evaporation in exhaust gas aftertreatment systems.

A multi-stage SCR control system adjusts reductant dosing rates using front and back catalysts to maintain deNOx efficiency.

Integrating the valve and conduit into a single hollow needle reduces structural complexity while maintaining precise gas flow control.