Internal Combustion Piston Engines TRIZ Cases

A selective catalytic reduction system routes exhaust gases through a warming cavity to heat the catalyst directly.

Diesel exhaust system uses selective catalytic reduction catalysts to achieve high NOx conversion while minimizing nitrous oxide greenhouse gas emissions.

Segmented pump cells manage oxygen concentration in adjustment chambers, resolving pumping capacity versus size trade-offs for accurate NO and NH3 detection.

Relocating power turbine downstream of exhaust treatment system eliminates torsional vibrations and reduces gearbox complexity.

A diagnostic method measures transient sensor responses to engine control events for monitoring catalyst degradation.

A lambda gradient profile analysis method monitors nitrogen oxide storage catalytic converter regeneration states using exhaust gas probes.

A two-phase regeneration method uses a pre-superheating stage to rapidly initiate soot combustion before lowering the temperature for controlled completion.

Negative pressure emptying prevents urea crystallization in SCR nozzles by withdrawing fluid before backward flow causes damage.

Integrating the thermostat into the heat exchanger wall reduces construction space and shortens reaction time to temperature changes.

Cooler bypass and EGR recirculation prevent atmospheric pollutant release during NSC regeneration.

A nozzle assembly flow director uses impinging guidance channels to create fine spray patterns from a single outlet.

A recirculation valve diverts compressed air to maintain boost pressure reserves.

Radially flexible mounting brackets absorb thermal deformation stresses, extending service life and simplifying installation.

An asymmetrical elliptical bowl with a rounded protuberance directs air-fuel mixture flow toward the spark plug.

Dynamic transmission control maintains rotor speed while optimizing fuel efficiency across varying engine loads.

A two-phase regeneration algorithm manages exhaust temperature and oxygen to oxidize soot in catalytic diesel particulate filters.

Shaft-driven fans direct excess airflow to cool turbine exhaust gases, maintaining optimal temperatures for selective catalytic reduction processes.

Liquid ammonia supply and recovery system captures unused fuel via reflux pipelines to prevent atmospheric emissions and reduce safety risks.

A pre-ignition fuel treatment reactor creates coherent-structured turbulence to ionize fuel molecules before combustion.

A pressure-differentiated exhaust aftertreatment device directs flow through a pipe to enhance reductant mixing and evaporation.

A hat-shaped collector captures heated oil near a suction device to enable efficient fuel transfer.

A compressor recirculation valve opens to lower induction pressure when humidity triggers condensate formation in a charge air cooler.

A connecting pipe with an extendable bellows part links the engine to exhaust components on a hydraulic excavator.

Segmenting the displacement body reduces moving mass, enabling rapid valve actuation that prevents pressure drops when the choke limit is reached.

Dielectric block filter uses outwardly extending walls to define a cavity and integrate electrodes.

A dedicated exhaust gas recirculation system uses a charge air cooler and backpressure valve to dampen exhaust pulses.

Lateral catalyst placement directs exhaust heat away from straddled vehicle components, resolving thermal accumulation near the swing supporter.

Mask sections and a central cavity reduce thermal stress between clad valve seats and base metal, preventing separation and improving fuel efficiency.

A flow-path structure uses a nested frame body to constrain barrel deformation during brazing assembly.

Wall integrated fluid injection uses micro nozzles to intensify fuel and oxidant mixing in internal combustion engines.

Segmented working chambers in a rotary engine eliminate reciprocating inertia forces, ensuring continuous power conversion and reduced noise.

A piston combustion bowl with a specific dimension ratio and reentrant surface promotes faster flame speed.

A rare earth oxide catalyst composition retains high specific surface area through a controlled precipitation and calcination process.

Integrated metallic honeycomb substrate enables rapid catalyst light-off during cold start periods.

A bypass leg containing phase change material heats supercharged intake air during cold engine starts.

An eccentric pump presses a deformable element against the housing to create seals, preventing freezing damage while maintaining dosing accuracy.

Circumferential inlets feed gas into a tortuous flow path that homogenizes the sample, resolving non-uniform composition issues for accurate NOx detection.

Diverting exhaust gas through a diagnostic SCR catalyst enables precise ammonia measurement, resolving cross-sensitivity issues between NOx sensors and ammonia.

Nested cooling passages absorb heat from gaseous injectors using liquid fuel, preventing thermal failure while recovering energy for combustion.

A controller diagnoses reducing agent supply abnormalities by integrating command and estimated values.

An integrated lid structure merges separate fueling and CO2 ports to reduce worker movement distance during simultaneous operations.

A gas intake manifold directs condensates toward gravity-driven orifices within the casing to ensure efficient fluid evacuation.

An intermediate specific gravity component region at the electrode connection boundary prevents void formation caused by metal migration during firing.

A vehicle control system coordinates engine, transmission, and lighting aggregates to minimize energy consumption.

A predictive algorithm estimates engine cranking time to manage automatic start-stop operations.

Electrical capacitance tomography detects soot accumulation to enable precise active regeneration control and prevent DPF overheating.

A heat-conducting sleeve transfers thermal energy from a heated supply line to a fluid interface, resolving low-temperature freezing issues.

Upstream and downstream oxygen sensors mount within a larger-diameter exhaust pipe section to detect catalyzer deterioration while minimizing sensor exposure.

Removing bosses from collector plates eliminates mechanical stress concentration and improves thermal efficiency in motor vehicle charge air coolers.

A liquid drain system uses check valves to separate water from fuel in vehicle filters.