Internal Combustion Piston Engines TRIZ Cases

A microcomputer monitors battery voltage and uses a latch circuit to disable the idling stop function during resets, preventing excessive voltage drops.

Welds turbine outlet to treatment inlet, reducing thermal inertia and system volume.

A controller determines operational parameters for multiple selective catalytic reduction systems using sensors on only one exhaust passageway.

A round filter element integrates a flexible separation section within its end body to manage fluid volume changes.

An intercooler cools exhaust to 300-500°F, condensing volatile hydrocarbons for removal while an air ejector increases oxygen concentration in the second stage.

An electric actuator positions a turbocharger wastegate flap against a housing stop to eliminate acoustic vibration during cold start bypass operation.

Gradient pore diameters in the filter partition wall increase particulate matter collision probability while reducing pressure loss.

Downstream NOx measurements evaluate upstream NH3 sensor reliability, preventing emission control errors from undetected failures.

A multilayer exhaust catalyst coat layer uses a cerium-free middle zone to separate palladium and rhodium functions.

A variable flow valve mechanism uses a disc spring to bias link and actuating rod ends against each other.

Electronic control unit manages electric power supply to conductive base material in vehicle exhaust systems.

A single-piece sheet metal sealing unit integrates a cup-shaped region and flat fastening area with a plastically deformable bead.

Segmented exhaust routing through a restriction valve reduces pumping losses while maintaining emission control.

High-aspect-ratio pores in the lower catalyst layer improve gas diffusivity under high intake air mass conditions.

Axial flow compressor uses intermeshed helical blades with distinct twist slopes to trap gas charges and ensure complete compression.

A virtual ammonia sensor derives dosing signals from downstream NOx measurements to maintain optimal reducing agent levels.

An air pump and heater supply controlled air to mitigate thermal shocks during hot shutdowns, extending aftertreatment lifespan.

Segmented circular passages prevent intake air from cooling exhaust gas, eliminating condensed water that damages the impeller.

Opposed-piston engine manages fuel spray momentum using opposing injectors to reduce cylinder wall impingement.

Coolant passage and auxiliary power unit prevent injector freezing during post-shutdown purge.

A helical delivery conduit accommodates thermal deformation within a dosing lance assembly to maintain structural integrity.

Integrating the first fuel pump inside the storage tank eliminates dedicated explosion-safe zones and reduces system layout complexity for marine vessels.

A dual path exhaust gas recirculation system manages intake flow to sustain compressor operation across varying engine speeds.

A control device adjusts engine process parameters based on SCR catalyst aging detection to maintain emission compliance.

Segmented honeycomb stacks distribute electrical current uniformly through a circumferential contact strip to enable resistive heating.

Collecting chambers isolate cylinder backflow from the main intake manifold, maintaining charge density and preventing downstream performance loss.

Integrated heat pipe system transfers thermal energy from exhaust attachment interface to cooling sink for passive temperature regulation.

A floating bush bearing device uses a circumferential groove with varying cross-sectional areas to manage lubricant oil flow.

Separate injection-molded plastic fittings eliminate heavy metal sleeves, reducing assembly complexity and thermal mismatch issues.

Heterogeneous calcium lanthanum catalyst enables efficient transesterification of crude oils at moderate conditions.

Mid-bed ammonia and NOx sensors provide real-time feedback to adjust reductant injection, resolving cross-sensitivity errors that limit precise ratio control.

A filter cartridge with a bypass opening allows filtered reducing agent to flow back out.

Segmenting the armature into independent parts resolves the trade-off between device complexity and actuating dynamics, enabling precise gas dosing.

An EGR cooler housing features an inclined wing to redirect coolant flow around heat exchange tubes.

A dosing arrangement directs urea solution back to the storage tank via a return line during engine shutdown.

A reversible EGR pump switches to reverse flow to block exhaust gas leakage, preventing component fouling and corrosion during non-recirculation engine modes.

Segmented thermoelectric modules with modular coolant tubes maximize temperature differences across exhaust pipes, simplifying assembly and repair.

An integrated sump and hose evacuate condensate using engine pressure gradients, preventing accumulation that causes misfires or structural freezing damage.

A turbine engine recovers chemical energy from reciprocating engine exhaust gases to drive secondary functions.

Thermal coupling heats the partial flow to decompose reducing agents, preventing ammonia backflow corrosion while maintaining engine efficiency.

An asymmetric projection on the valve arm automatically aligns with the valve body, preventing installation errors and reducing manufacturing scrap.

Absorption chiller uses exhaust heat to cool gas, eliminating tempering air and improving efficiency.

A vaporizer uses secondary engine heat to convert cryogenic fuel into gas for delivery.

An electronic control module manages reductant flow via a pressure regulator, eliminating urea infrastructure needs and cold weather freezing issues.

A component carrier with a clamping plate secures a pump and filter assembly within a delivery unit housing.

Attaching the reducing agent pump to a first column member outside the vehicle body simplifies maintenance access and reduces hose length.

Movable partition wall with guide contours manages thermal expansion in air gap insulated exhaust manifolds, reducing wear and mechanical damage.

A vehicle thermoelectric generator uses a single driving unit to operate valves that route exhaust gas through selective flow passages for heat exchange or electricity generation.

Virtual segmentation captures radial heat transfer to resolve inaccuracies from constant radial distribution assumptions.