Internal Combustion Piston Engines TRIZ Cases

A bi-directional exhaust valve redirects flow upward or downward based on ground speed signals to manage heat distribution in compact tractors.

Diagnose stuck sensors by activating the heating device outside normal conditions and evaluating temperature gradients after deactivation.

A control device manages exhaust throttle valve opening to heat diesel particulate filters during forced regeneration.

Segmented venturi assemblies with individual metering restrictions ensure consistent fuel-air ratios across cylinders, reducing uneven emissions distribution.

A tubular exhaust aftertreatment device directs gas through a central catalyst and an annular passage to achieve rapid internal and external heating.

A vehicle exhaust assembly routes gases through a resonator and turbocharger passage to maintain energy levels.

Asymmetric exhaust passage geometry lowers sensor height by enabling side-mounted placement, reducing vertical obstruction and improving flow uniformity.

A heating element acts as a thermistor to detect temperature via electrical resistance changes.

An integrated heat exchanger manages LNG temperature for high and low pressure engines, reducing system complexity and costs.

Dynamic compressor speed tracking accelerates catalyst light-off temperature while minimizing energy consumption.

Feedback mechanism adjusts ammonia estimates from slip sensors to minimize NH3 and NOx emissions during SCR operation.

A burner control method uses combustion pressure signals to optimize air-fuel injection and ignition timing for exhaust after-treatment systems.

Segmenting the casting core allows a single box to form complex internal cavities, eliminating flow adapters and reducing assembly time.

A valve timing control unit applies phase swing to distribute bearing pressure evenly.

An integrated flat armature design reduces moving mass to enhance switching dynamics while maintaining reliable sealing in internal combustion engines.

Dynamic threshold adjustment resolves static parameter limitations by aligning engine auto stops with specific driver habits and geographic patterns.

A low-temperature motor compressor unit uses an active chamber and external combustion to expand compressed air for efficient work production.

An ignition control device advances timing to prevent self-ignition and triggers misfire strokes to limit piston force.

A multi-spindle head machines intake and exhaust valve holes in a cylinder head using a rotatable index plate to shift the workpiece vertically.

Segmented centering elements allow radial thermal expansion to minimize clearances between the turbine wheel and casing, improving efficiency.

A relief valve design uses a radiation shield plate to divide the housing into two chambers for continuous air cooling of the diaphragm.

A secondary air diagnosis apparatus stabilizes pressure detection using a reliability maintaining unit.

Segmenting manifolds into distinct joining processes adapts each component to specific mechanical and thermal stresses, reducing manufacturing costs.

Segmented piston crown stages direct fuel toward the central axis, increasing turbulence and optimizing mixture formation while reducing exhaust emissions.

A particle sensor offset detection method measures exhaust concentration at two engine operating points to determine filter efficiency levels.

Angular counter-rotating carrier wheels drive orbital pistons, eliminating reciprocating momentum reversal and reducing mechanical complexity.

Segmented DOC and SCR devices store hydrocarbons during cold start, releasing them for oxidation when the downstream catalyst reaches light-off temperature.

A system estimates soot consumption rates by interpolating empirical boundary data with theoretical relationships across varying engine operating conditions.

A composite optical element uses separated prisms to guide light directly through a sample.

Segmenting the actuator housing reduces thermal overload on the worm gear transmission while maintaining precise waste gate valve control.

A resonator cavity generates counter-phase pressure waves to dampen vibrations within the exhaust conduit of a turbocharged piston engine.

A honeycomb catalytic converter uses a graded cerium concentration in partition walls to enhance oxygen reach for noble metal catalysts.

A tank device with a lamella structure subdivides the interior space into cells to manage frozen urea solution expansion.

A turbine housing uses a heat-shielding core to form an internal exhaust gas flow passage.

An intake port plate reinforces this circular flow pattern to improve air-fuel mixing while avoiding complex cylinder head machining.

A rotary machine uses a hub driven four bar linkage to create controlled reciprocation motion within an oval housing.

A gas sensor uses orthogonal spring guide grooves to stabilize contact springs and maintain reliable electrical connection.

Cross-sensitive upstream and downstream NOx sensors calculate conversion efficiency to distinguish catalyst degradation from dosing agent issues.

Alternating exhaust gas flow prevents localized overheating and extends thermoelectric generator lifespan in vehicle systems.

A control system adjusts nitrogen oxides sensor signals using correction values derived from engine operating conditions to enable precise reducing agent injection.

Segmented casing and radial flow distribution minimize pressure losses while maintaining NOx reduction efficiency at low temperatures.

Protruding segment walls prevent detachment during thermal cycling while inverted cell plugs reduce clogging.

A multi-cylinder engine exhaust system uses independent high and low velocity passages controlled by a variable area valve to optimize gas flow dynamics.

A fluid supply module uses a labyrinth structure between base and cover plates to direct leaking reducing agent away from control electronics.

Regression model constructs dynamic conflict area from vehicle dimensions to provide intuitive warnings without extensive field data collection.

Asymmetric upstream Rh and downstream Pd catalyst layers on a wall-flow substrate prevent noble metal sintering at high temperatures.

Loosely attached corrugated metal sheets absorb thermal stress through flexural elasticity, reducing production costs for exhaust gas systems.

Varying uniflow engine intake port areas minimizes swirl-induced energy consumption and heat transfer while achieving efficient gas exchange.

Segmented cylinder architecture resolves compression ratio constraints by isolating intake, combustion, and expansion phases for natural gas.

A vehicle cooling system uses separate high and low temperature circuits with dedicated pumps to manage thermal loads across multiple devices.