Internal Combustion Piston Engines TRIZ Cases

A bluff body splits fuel jets into turbulent streams to facilitate oxidant mixing within the combustion chamber.

Inlet air ducts propagate pressure waves to create underpressure and expand charge air, reducing combustion temperatures without adding device complexity.

An exhaust gas sampling device extracts representative gas portions via dedicated passages to enable precise sensor detection.

Separate heating devices thaw components sequentially to prevent volume expansion damage from frozen reducing agent solutions.

A moveable element adjusts the pre-chamber dead volume ratio to enhance combustion conditions across varying engine loads.

An exhaust gas dosing module uses an inclined annular inlet to generate a coaxial urea spray for complete decomposition.

A plastic tank integrates a delivery duct within its wall structure to extract operating fluid directly from the container body.

Recovers retarded ignition timing by accumulating driving time across operating conditions, preventing excessive delay and maintaining fuel efficiency.

Aligning cutting angles with the rolling direction prevents cracking during bending, ensuring durable ignition electrodes for pre-chamber spark plugs.

A supercritical carbon dioxide heat engine recovers waste heat from aircraft exhaust and coolant to generate mechanical energy without reducing thrust output.

Partition wall protrusions distribute stress during crimping, preventing cracks in the honeycomb filter structure.

A brake hold mechanism maintains vehicle braking force after pedal release to manage driveline tension during engine restart.

A control system predicts urea crystallization risk using exhaust temperature and injection data to activate adaptive removal strategies.

Thermal contact between the catalytic converter and turbine housings transfers exhaust energy, eliminating electrical heating requirements.

Curved convex channel geometry reduces pressure drop and plugging while maintaining high chemical conversion rates in SCR systems.

A coolant temperature controller adjusts EGR cooler flow to prevent condensation in low-pressure loop exhaust gas recirculation systems.

A filter arrangement with a restraining body prevents floating in reductant tanks, ensuring reliable priming by removing air bubbles.

Integrating thermal insulation into the tank wall delays freezing and prevents bursting without adding assembly complexity.

Superheating the pressurized reductant solution prevents localized cooling and solid deposit formation during cold start conditions.

An auxiliary burner supplies combustion heat to a post-combustion chamber, stabilizing low-oxygen exhaust gas burning for efficient denitrification.

A mounting structure for water-cooled air coolers aligns the end cap bottom surface flush with the casing opening to facilitate smooth air flow.

Segmented fuel supply lines isolate exhaust dosing pressure from engine injection stability during regeneration.

Evaporating urea precursor into a heated gas flow enables independent reducing agent delivery, preventing byproduct deposition from exhaust-dependent transport.

Accumulating outlet lambda values across multiple regeneration cycles resolves transient measurement inaccuracies and detects catalyst degradation.

A ceria-zirconia composite oxide with a pyrochlore structure manages oxygen absorption and release rates in exhaust purification systems.

A tapered reactant delivery body with an integrated heating device evaporates liquid agents directly within the exhaust flow channel.

Upstream SCR catalyst positioning accelerates light-off speed while eliminating active thermal regeneration to lower fuel consumption.

Variable geometry valve directs exhaust gas through separate passages with angled fixed vanes, optimizing entry angles for part load efficiency.

A cruise control system modulates commanded axle torque within a defined speed bandwidth to optimize fuel efficiency.

A flow modifier with bores and slots conditions exhaust gas velocity upstream of a reagent injector to improve mixing efficiency.

Inclined bypass passages drain water toward the air cleaner, preventing blockage and eliminating the need for separate reservoirs.

A fuel injection valve uses a dual-actuator assembly to adjust the valve member displacement and control fluid flow area.

Segmented air injection controls catalyst temperature while maximizing hydrocarbon and carbon monoxide conversion efficiency.

Periodic exhaust valve cycling purges residual gases to reduce engine knocking tendencies and increase torque at low speeds.

Analyzing NOx differences between dual SCR legs detects sensor tampering, minimizing NOx slip while maintaining compliance.

Power management system detects low charge acceptance and increases charging voltage to alleviate sulfation, preventing start-stop mode failure.

Connection flanges and support brackets decouple heavy treatment components from the exhaust pipe, reducing vibrational stress on the conduit.

Adjusting crankcase pressure prevents lubricating oil transport into the combustion chamber, resolving premature ignition risks in supercharged engines.

An exhaust system heats the aftertreatment device using an electric heater, fuel injector, and recirculation fan to maintain catalyst temperature.

A fuel injection system uses a switch valve to select between two dedicated injection valves.

Direct urea injection eliminates anhydrous ammonia storage hazards while maintaining selective catalytic reduction efficiency.

Segmented SCR substrates in a removable housing reduce exhaust backpressure while maintaining total surface area for NOx reduction.

Segmented catalytic coating in wall flow filters balances high filtration efficiency against increased exhaust back pressure.

Partitioned header tanks merge engine and intercooler cooling into one assembly, reducing package size and ventilation resistance.

An external heating element in a shell recess uses thermally conductive plastic to transfer heat, preventing urea corrosion damage.

An SCR system uses a virtual sensor model to detect ammonia slip without physical sensors, reducing cross-sensitivity errors and operating costs.

Direct optical measurement eliminates cross-sensitivity errors from indirect sensors, enabling precise reductant dosing.

An abradable coating on a carbon scraping ring conforms to piston geometry during operation.