Internal Combustion Piston Engines TRIZ Cases

Grooved seals and nested coils reduce mass while preventing urea precipitation.

Segmented dual-pump architecture with controller-regulated valves eliminates excess oil waste while maintaining precise lubrication pressure.

A variable buoyancy heater uses thermal expansion to adjust float position and maintain contact with the liquid medium.

Calculation rules separate ammonia and nitrogen oxides fractions from single sensor signals, resolving cross-sensitivity issues in SCR exhaust gas analysis.

Assessing selective catalytic reduction device condition using thermal models and temperature differentials.

A regeneration control device detects diesel oxidation catalyst blockage risk using an operation time counter to manage exhaust temperatures.

A variable inlet guide vane system adjusts compressor airflow velocity and direction through dynamic cross-sectional area changes.

Varying outlet duct radii compensate for path length differences to ensure uniform permeability and aerodynamic tumble movement.

An integrated air casing relocates heavy charge air coolers from the engine bracket to the base structure, reducing vibration and structural stress.

A fuel supply device integrates a pressure-regulating valve and dynamic volume passage to stabilize fuel pressure within the housing.

A controllable valve modulates exhaust gas pressure and flow rates through a bypass heat exchanger to resolve insufficient flow caused by low backpressure.

Segmented cooling reduces plumbing complexity and packaging footprint while maintaining intake air temperature control.

A shared bypass line routes exhaust gas around the turbocharger to reduce back pressure and prevent thermoelectric material damage.

Lube oil controlled ignition prevents abnormal combustion by using lubricating oil as a reliable ignition source.

Rotatable connection interfaces on a modular mixer allow exhaust components to adapt to tight packaging constraints without increasing manufacturing costs.

A single-layer catalyst coating merges palladium and rhodium components on cerium-zirconium mixed oxides.

A frame bundles exhaust purification substrates into a rigid unit that resists leaks while maintaining compact device size.

A heat-resistant insert with a subchamber positions pilot fuel and ignition elements to resolve poor ignition stability in rotary engines using heavy fuels.

A start-up control unit limits throttle valve opening and power increase rates during engine ignition to maintain stable air-fuel ratios.

An ammonia supply injector and control unit manage urea injection into engine exhaust passages to enable selective catalytic reduction.

Flexible silicone rubber plate-type control check valve manages fluid flow between combustion chambers.

A controllable bypass valve redirects exhaust flow upstream of the turbine to prevent power reversal.

Elastic deformable intake duct area accommodates front fork orbital movement during steering.

A turbofan intercooler located in the bypass duct reduces intake air temperature to improve thermal efficiency and lower thrust specific fuel consumption.

Segmented rotating ring design reduces friction losses and improves operational reliability in exhaust gas turbocharger turbines.

A porous ceramic body integrates zeolite inside pores and a three-way catalyst on walls to manage exhaust gas.

Integral casting of the inlet valve casing eliminates separate housing components, reducing manufacturing precision requirements and installation costs.

An integrated metallic body merges a hydrodynamic clutch and planetary gear set to dampen torsional vibrations while matching rotational speeds.

Downward sloping lines and air release valves prevent air pockets from blocking reductant flow during priming.

A permeable funnel body connects exhaust treatment elements to an outlet nozzle, allowing gas passage through its shell.

Varying nozzle areas along the flow path maintain constant gas velocity, resolving energy loss from decaying pulse speed.

Segmented Pt-Ce-Pd filter resists sulfate poisoning while enabling passive regeneration via cerium nitrate formation.

A modular gas feed system uses separate line portions between adjacent valve housings to eliminate external support structures.

A thermoelectric device uses thin metal foils with semiconductor components to convert thermal energy into electrical power.

Perforated outlets in an exhaust module attenuate noise while enabling accurate sensor data collection from multiple catalysts.

A turbocharger actuating device uses a coupling rod with ball joints to transmit force.

Thermal evaluation of reducing agent content replaces resistance methods to resolve precision versus complexity trade-offs in SCR emission control systems.

Comparing upstream and downstream oxygen sensor readings detects EGR leaks, preventing catalytic converter damage and emission increases.

An electrolysis unit decomposes urea into hydrogen and ammonia, enabling effective low-temperature NOx reduction while preventing catalyst clogging.

Straightening passage around cooling fan directs airflow to intake port, preventing dust clogging in air cleaner.

A pre-chamber engine configuration controls flame momentum through specific bore and stroke ratios.

Roughened liquid passages in a variable capacity turbocharger drain moisture from the drive chamber, preventing freezing that hinders nozzle vane movement.

Electronic actuator adjusts guide blade positions dynamically to maintain precise flow control.

A cylinder head fuel guiding portion creates swirl and turbulence to distribute fuel evenly within the air intake stream.

Grid heaters raise exhaust temperature quickly, enabling earlier EGR flow and reducing engine-out NOx emissions before SCR activation.

A variable geometry turbine uses a rotatable yoke shaft and arms to adjust the nozzle ring position within the housing.

Dual differential pressure sensors estimate soot load by switching between low-flow and high-flow measurement pairs based on exhaust gas flow rate thresholds.

An electromagnetic wave irradiation device detects resonance frequency changes in a NOx catalyst to assess acid site saturation levels.

Dual determination logic modulates air bypass valve actuation using compressor flow and throttle position data.