Internal Combustion Piston Engines TRIZ Cases

A bypass duct diverts hot exhaust gases around the turbine to heat the urea injection space, preventing crystallization during cold starts.

Separating the ventilation channel from the filling path reduces liquid escape during rapid fueling.

Segmenting the vent channel into integral and external sections resolves manufacturing complexity while preventing liquid spray back during urea tank refilling.

An asymmetric projected section in the EGR passage directs exhaust gas flow away from the throttle valve to ensure proper mixing with fresh air.

Bypass line delivers oxygen-rich exhaust gas to the particle filter for regeneration.

Stacked sensor compares reference and main electrode capacitance values to compensate for environmental noise and eliminate initial cumulative time.

Heating coil assembly thermolyzes reductant to generate ammonia, preventing deposits that reduce system efficiency.

A control portion determines secondary combustion ratios using an intake pressure sensor and exhaust oxygen sensor to detect faults.

Controller estimates delta current demand changes from electrical loads to prevent battery voltage drops during micro-hybrid engine stop events.

A bypass exhaust gas stream splits from the main flow to decompose reducing agent precursors into ammonia within a dedicated reactor.

Hybrid heating manages doser temperature to ensure optimal chemical reactions for reducing Nitrous Oxides in automotive exhaust streams.

Offset bearing holes in the shroud and hub rings compensate for differential thermal expansion, preventing nozzle vane inclination and gas leakage.

A turbine housing with two exhaust-gas volutes uses a separating wall bore to guide a displacement shaft for precise volute connection control.

Intermittent actuator energization maintains the moving intake pipe position, reducing device complexity and energy usage.

Integrating a butterfly-type turbine bypass valve reduces actuator output requirements and thermal deformation risks in compact two-stage supercharging systems.

Spiral guide vanes create a vortex that accelerates exhaust gas, reducing pressure drop and re-inflow while improving engine output.

Segmented insulation covers side surfaces to resolve attachment complexity and maintain adhesive integrity under high temperatures.

A segmented air-flow grid creates a uniform flow field at the outlet, resolving turbulence issues that degrade mass air flow meter precision.

Switching off the delivery pump allows pressure equalization with ambient air, enabling accurate sensor adjustment and preventing freezing damage.

Component carrier integrates with coolant circuit to heat dosing system components through thermal contact.

A vehicle running control device dynamically adjusts target driving force based on speed deviations to optimize fuel efficiency.

A diagnostic method uses a downstream NOx sensor to measure exhaust gas concentration changes for precise catalyst state assessment.

Variable aperture exhaust ports manage resonant gas flow to reduce emissions while preventing piston skirt damage at high speeds.

Segmenting the tank with a baffle protects the sensor from air and temperature interference caused by return fluid discharge.

Integrating annular chambers with porous walls into the intake duct absorbs noise without increasing pressure drops or device volume.

A discharge controller adjusts spark plug current and duration based on engine speed to maintain stable ignition.

A holding member secures an examining filter in a secondary exhaust line to maintain structural integrity during engine operation.

Fluorite type ceria-zirconia composite oxide carrier with phase-separated ceria enhances oxygen storage capacity.

Obstruction walls in the intake chamber direct air toward outlet orifices, resolving non-optimal air distribution that reduces catalytic converter efficiency.

Segmented sealing bodies with atmospheric free regions interrupt urea creepage paths to prevent electrical short circuits in heatable media lines.

Segmented orifice arrays distribute azimuthal fuel flow to reduce thermal stress on pre-combustion chamber tips while maintaining stable combustion efficiency.

Start-up controller adjusts engine rotation limit based on automatic transmission shift position to prevent excessive revving during idle-stop restarts.

An external idle air bypass system with an adjustable metering valve controls airflow into the intake plenum.

Pre-heating the reducing agent via a dedicated heating element accelerates purification member temperature reach, shortening the transitional phase duration.

Merging oxygen sensing into a single NOx sensor eliminates separate hardware, reducing complexity and cost while maintaining measurement precision.

A precombustion nitric oxide exchange chamber modifies ambient air using spark plugs and magnets before fuel combustion.

Projected bush members connect the shaft to the valve body, suppressing thermal deformation while ensuring reliable operation.

A fuel valve pushes ignition liquid ahead of gaseous fuel into a nozzle sac volume to enable self-ignition.

Patsnap Eureka TRIZ case analyzes how pre-heating catalysts via burners reduces pollutant emissions during cold starts.

A nested inner pipe pyrolysis system integrates heating and injection for reducing agent decomposition.

Engine exhaust aftertreatment system mounts in a carrier deck recess between axles to minimize crane height.

Curved peripheral edges on metering plates reduce sensitivity to manufacturing tolerances, keeping discharge coefficients within 5% variation.

Segmented spray disc uses a rear reinforcing structure to withstand ice pressure, ensuring fine atomization and structural integrity during freezing.

Dual estimation controls electrically heated catalyst temperature using sensor and exhaust data, resolving insulation risks from direct thermal sensing.

Asymmetric spark plug offset directs fuel flow to earth electrode, eliminating knocking and improving ignition reliability.

A reducing agent supply unit cools injection nozzle interiors below urea crystallization temperatures to maintain continuous fluid flow.

A low-pass filter smooths the NOx signal downstream of an SCR catalyst, preventing erroneous control corrections caused by erratic exhaust gas flow rates.

Segmented double-walled fuel pipes isolate leakage spaces to localize leaks without increasing hardware complexity through universal pressure sensors.

Diagnostic means determine fouling rates to adjust hydrogen injection parameters, preventing EGR valve sticking and maintaining combustion efficiency.

Integrating charge air line sections into engine carriers eliminates separate supports, reducing weight and simplifying assembly.