Internal Combustion Piston Engines TRIZ Cases

A pin structure in the combustion chamber evens temperature and speeds mixture formation to cut NOx, CO, and HC emissions.

Adjustable press stations use decore and recore shafts to remove and install DECD cores across varying shapes while improving alignment.

A two-stage regulator uses a sealed intermediate chamber and electric actuation to improve gaseous fuel flow precision during sudden engine speed changes.

A hemispherical wastegate plug improves self-centering, sealing, and leakage control while reducing stress and wear in turbine housings.

Opposite-thread shaft alignment and packing-ring sealing speed choke replacement and enable online leak plugging without shutdown.

Stored supercapacitor energy enables automatic engine shutdown and restart while heating and pre-lubrication cut fuel use, noise, and wear.

A curved elastic body in a turbocharger wastegate valve reduces biasing-force variation to improve sealing and suppress noise.

Separate heated-air and fuel passageways warm hoses and nozzles to prevent freezing, maintain dispensing, and avoid bulky heated cabinets.

A virtual-point calibration approach uses one 6-DOF reflecting head to avoid clamping and light interruption errors in high-precision motion mechanisms.

Integrated cooling channels protect the turbocharger wastegate pressure capsule diaphragm from full-load heat and enable retrofit cooling.

A hose-integrated flow restrictor equalizes CMCV response between cylinder banks without adding a second vacuum solenoid valve.

Arced seals and roller-supported contours enable twice-per-revolution working cycles while limiting friction and fluid or gas leakage.

A pointed exhaust bypass valve redirects flow through or around the turbocharger to cut backpressure and maintain engine performance at altitude.

Outlet-pressure feedback opens the valve as pipeline pressure rises, helping dense pneumatic conveying move heavy material without air cutoff.

A laterally extending leaf spring replaces a helical spring to shorten valve length while maintaining pressure regulation and easing relief load.

Tapered thrust-surface grooves and one discharge groove raise oil film pressure for higher turbocharger thrust load without excess oil loss.

A rotating-carrier oil feed and spray bar maintain lubrication at planetary gears and the ring gear during misalignment, reducing wear and breakage.

A radial pipe projection enables remote laser welding on exhaust gas heat exchangers, improving weld strength while reducing access space and join time.

Auxiliary channels extruded around an inner tube prevent wall collapse and keep heating wires fixed for more uniform fluid heating.

Pressed-and-sintered molybdenum forming tools withstand harsh cooling, cutting cycle time while preserving high-temperature strength and quality.

Hot forging plus controlled cold drawing forms a stepped engine poppet valve stem while reducing blind-hole roughness, cracking, and cycle time.

Adaptive grid preprocessing skips noncritical cells and preserves obstacle-region precision to speed distance transformation in path planning.

A stationary-to-rotating bearing oil path lubricates misaligned planetary gears across a rotation gap, reducing wear and breakage.

Using a lower-expansion valve member keeps the wastegate gap stable during heating, avoiding blockage while reducing leakage in gas engines.

A computing graph parallelizes prediction, objective, and gradient steps to cut MPC compute time and support real-time control.

Independent exhaust flue modules on elastically suspended platforms cut low-frequency ship vibrations without sacrificing onboard space.

Magnetic sensing tracks piston position through the cylinder liner, enabling stable hydraulic compression ratio control in a variable compression engine.

A hermetic adapter and valve-controlled exhaust capture assembly helps ships treat port emissions while maintaining stable temperature for efficient abatement.

Removing protruding plugged portions lets masks seal tightly on honeycomb bottom faces, preventing cell clogging during segment joining.

A pump-heated circulation loop keeps AUS32 warm and moving to prevent freezing, crystallization, clogging, and bulky heated cabinets.

Independent exhaust flue modules on elastic suspensions cut low-frequency ship casing vibrations without using buffer spaces.

A nested connector layout keeps the inner hose accessible while separating two fluid paths, simplifying dual-hose assembly and reducing errors.

A central-shaft three-valve assembly and parallel fuel pump simplify combustion control, reducing jamming and lubrication needs in fastener tools.

A front hose reel and rear urea tank with a forward water inlet save deck width while improving reel access and urea refilling.

A raised step in piston valve pockets restricts combustion gas flow, reducing cylinder-liner oil film displacement and heat transfer.

A multi-stage throttling damping assembly absorbs pressure fluctuations between injections to keep common rail fuel delivery accurate and stable.

A shaped internal weight-reduction space lightens a two-stroke piston while preserving strength and supporting low hydrocarbon emissions.

Arced roller ways and seals let a rotary engine create multiple combustion events per revolution while reducing friction and sealing losses.

A fluid-connected air gap behind the piston cover cuts heat transfer and equalizes pressure to keep a thin cover from deforming.

Oil film holding features in the housing suppress lubricant outflow, damp shaft vibration, and preserve bearing support cylinder rigidity.

Interchangeable adapters let one reservoir vent valve fit different shutoff heights while limiting fuel vapor loss and droplet carryover.

A relieved through-hole in the nozzle plate prevents caulking contact that triggers fretting fatigue, improving nozzle support durability.

A variable-speed drive on the epicyclic carrier keeps output speed stable across changing turbocharger input while transferring power to the engine.

An integrated cylinder head prechamber lets the ignition plug be replaced alone, cutting repair time, cost, waste, and premature ignition risk.

Variable-size straightener cells stabilize bent-pipe intake airflow, improving flow meter accuracy across low and high engine operating rates.

Polar-modified rubber layers enable direct bonding of low-polarity EPDM laminates, improving heat, fatigue, and thermal resistance.

Rounded wall geometry between turbine volutes cuts flow separation, improves exhaust gas transfer, and lowers pressure differences.

A lower-rigidity connection shaft places the vibration node between bearings, suppressing critical-speed rotor response without losing durability.

A cam protrusion and leaf spring delay intake valve opening at low RPM for NVH, then enable rapid full opening for high air flow.

Strategic diagonal fillets reinforce ceramic honeycomb cell corners, boosting mechanical strength without increasing pressure drop.

Segmenting the fixing mechanism into a pin, flange, and spacer reduces nozzle mount weight while maintaining reliable drive ring retention.

Quaternary ammonium salt additives in gasoline compositions reduce deposit formation in direct injection engines, maintaining fuel economy and power output.

An intake sound generator uses a sound throttle linked to the engine throttle lever to provide natural aural feedback independent of electronic control.

Dynamic adjustment of injector timing based on operating parameters resolves contradictions between delivery quantity and measurement precision.

A controller monitors exhaust gas constituent capture devices by comparing actual sensor readings against predicted output values to assess component state of health.

A lock pin positions the variable valve timing phase at a predetermined middle position before engine start-up.

A radial heat exchanger guides exhaust gas flow across thermoelectric tubes to enable efficient thermal energy conversion.

Hard and elastomeric seals in the pre-chamber tip prevent coolant leakage into the fuel stream, extending component lifespan.

Condensing evaporated water via a heat exchanger eliminates visible plumes and reduces the logistical burden of refilling mobile scrubbers.

Segmenting the fuel supply and pressurizing returned low viscosity fuel maintains liquid phase stability, enabling efficient combustion of hydrocarbon fuels.

A sensor element with an optimized air introduction portion balances thermal conduction and gas supply for reference electrode operation.

Segmented exhaust passages isolate pressure events to reduce back pressure and improve emissions efficiency.

A dielectric barrier discharge apparatus cleans engine optical windows using high-frequency voltage pulses between internal and external electrodes.

Turbulence induction protuberances on piston crowns accelerate flame propagation to reduce unburnt hydrocarbon emissions.

Dynamic apportionment reallocates excess dosing to higher-capacity injectors, reducing impingement and deposit formation in SCR systems.

An angled slide stem actuates a common control slide to manage exhaust ports, reducing piston ring entrapment risk and frame interference.

Vapor precooling followed by liquid cooling reduces component temperature differential, minimizing fuel vaporization and reservoir pressure buildup.

Nested suction tubes within a semipermeable sleeve reduce bubble formation around fluid sensors, avoiding the complexity of mesh filters.

A filter abnormality determination system adjusts detection timing based on exhaust gas flow rate variations to ensure accurate particulate matter sensing.

Internal gas channels cast directly into the cylinder head eliminate external piping complexity and reduce component costs.

A diesel oxidation catalyst uses base metal oxide washcoats to generate nitrogen dioxide for particulate filter regeneration.

Machine learning generates mapping data for catalyst temperature estimation, reducing adaptation man-hours while maintaining accuracy in transient states.

A construction machine fuel tank features a stepped upper surface that defines a liquid reductant tank installation space beneath a tank cover.

A reductant delivery unit injector flange uses a radius surface to control urea solution flow.

Extending the breather pipe along defrosting piping prevents clogs from frozen urea, ensuring uninterrupted supply in cold climates.

Segmented sheet metal turbine housing assembly minimizes exhaust gas cooling to maintain downstream emissions control device effectiveness.

Merging the heating conduit with the tank wall eliminates separate pipes, resolving complexity while maintaining effective temperature control.

A valve seat ring bore channels vacuum pump suction pressure to the intake valve gap, limiting flow separation and backflow that reduce effective area.

A data processor calculates ash and soot mass from signal attenuation to trigger regeneration only when necessary, reducing energy consumption.

Segmenting the aftertreatment system allows compact burners to rapidly heat downstream catalysts, overcoming installation space limits.

A controller generates combined SCR catalyst degradation estimates from short-term reversible and long-term thermal aging models to adjust reductant dosing.

Downward through hole with waterproof breathable membrane prevents water entry into actuator housing.

A segmented end cover design incorporates accessible maintenance holes to enable localized O-ring replacement without removing the entire assembly.

Adjusts engine start thresholds based on vehicle speed to align with driver intent.

Internal fluid flow through a ribbed catalyst structure accelerates light-off temperatures and protects the layer from overheating.

Incorporating aromatic amines into lubricants advances spark timing by 5 to 15 degrees while preventing engine knocking.

A bypass conduit diverts exhaust gas around an oxidation device to manage thermal conditions during catalyst regeneration.

An elliptical piston bowl rotates the charge around a transverse axis, generating turbulence intensity near top dead center.

A controller calculates ammonia slip using NOx sensor data and engine models to adjust urea injection.

A heat transfer element moves thermal energy from a high-temperature exhaust zone to a reductant evaporator, enabling efficient evaporation at low temperatures.

Adjustable flywheel coupling manages mass moment of inertia to eliminate turbo lag while preventing excessive compressed air consumption after gear shifts.

Segmented seal portions reduce insertion load and friction while maintaining high sealing ability against air leakage between chambers.