Internal-Combustion Engine Testing TRIZ Cases

Bidirectional flow passages in the inner cover resolve the trade-off between heat retention and low-velocity responsiveness by segmenting the gas path.

A rotary jig rotates the crankshaft while a probe inserted through the spark plug hole detects the piston top dead point position.

Iteratively updating degradation factors via a solver minimizes prediction errors during transient maneuvers, enabling high-precision health assessment.

Dynamic gain tables compensate for varying engine noise sources to improve knock detection accuracy and reduce false indications.

A distributed fiber optic sensing system measures dynamic strain and temperature on gas turbine engine housings using optical frequency domain reflectometry.

A camshaft sensor processing method calculates rotational speed between successive tooth fronts to validate detection signals.

A misfire detection system adjusts judgment values using a correction coefficient based on particulate matter accumulation.

A unit controlling unit determines inner effective torque from rotational speed and mass inertia to manage drive units on test stands.

A pressure-measuring plug uses a ring-shaped sensing structure with an inner core to mount a rod element for combustion engine monitoring.

An abnormality diagnosis unit calculates sensor response characteristics by alternating air-fuel ratios between rich and lean states.

A multi-sensor misfire detection system cross-validates crankshaft acceleration with exhaust gas data to confirm cylinder faults.

Database management device determines functional relationships between maintenance parameters and engine performance changes.

A laser-based method generates multi-dimensional emission profiles by combining single-dimensional absorption spectra from multiple directions.

A portable vehicle diagnostic tool connects to a remote information device via a web server intermediary.

A control device adjusts cranking target torque based on engine rotation speed to maintain an optimal region during starting.

An electrically conductive electronics compartment cover shields the sensor chip from dust particles.

Dynamic visual indicators on a schematic diagram help operators recognize safety hazards across complex internal combustion engine test systems.

Preloaded springs mount speed sensors to detect erratic readings from gas turbine vibrations, enabling reliable health monitoring without extra equipment.

Fluorine coatings on ceramic separators block moisture ingress to maintain insulation resistance and prevent leakage currents.

Adaptive scaling estimates residual mass via an observer to resolve measurement precision issues in real-time HCCI combustion control.

A crankshaft speed metric calculates rotational speeds across three cylinder combustion cycles to determine engine parameters.

Decomposition reactor generates NO2 from nitric acid for controlled injection into burner-based exhaust replication systems.

A controller detects intake pressure variations and exhaust air-fuel ratios to identify stuck valve states in cylinder deactivation systems.

A controller monitors sensor signal timing against power supply switching to verify correct mounting positions.

Segmented exhaust sampling assemblies with swirl bowls reduce backpressure and noise while preventing liquid exposure to sensors.

A porous ceramic sensor detects soot by measuring temperature differences between catalytic and stable elements.

Band-pass filtering of accelerometer signals correlates with combustion events, resolving the trade-off between measurement precision and device complexity.

A vehicle sensor uses a curved metallic cover and rubber bush to support lead wires through radial contraction.

A pressure reduction pump creates negative pressure in the purge pipe to enable fault detection when the engine is stopped.

Dynamic parameter adjustment reduces specific fuel consumption and prevents component damage when locomotive engines switch between fuels.

A vehicle tachometer display control unit calculates acting rotations to simulate stepped shifts during acceleration.

A method determines ammonia mass flow between two SCR catalytic converters using NOx sensor signals.

A closed breather disconnection detection method calculates in-cylinder mass flow rate from boost pressure and intake temperature to identify gas return pipe faults.

Sampling exhaust pressure during valve opening isolates combustion signals, eliminating blow-through noise and false positives at high speeds.

Segment ion current signals into crank angle subintervals to extract dimensionless combustion features, resolving air/fuel ratio estimation sensitivity.

Calculating oxygen concentration differences across an oxidation catalyst identifies component deterioration through multi-temperature analysis.

Temperature sensors measure upstream and downstream profiles to detect catalytic converter presence.

A selective catalytic reduction system monitors exhaust gas flow to estimate reductant storage levels for accurate catalyst health assessment.

A ceramic spacer with a concave portion insulates the seal member from connector heat in gas sensors.

Direct hydrocarbon concentration measurement replaces indirect thermal methods, resolving poor accuracy in oxygen-rich exhaust environments.

Intermeshing comb electrodes on a ceramic substrate enable resistive sensing of exhaust gases, reducing manufacturing costs for small engine applications.

A crankshaft angle sensor calculates tooth period ratios to detect engine reverse rotation during idle stop cycles.

An immersed crankcase pressure sensor detects breaches and oil levels, eliminating extra hardware to reduce system complexity.

An insulated ash inflow pipe protects components from thermal stress while maintaining high burner temperatures for accurate service life simulation.

Monitoring exhaust gas probe temperature growth rates detects heater defects without false positives from ambient conditions.

Segmented conductor cells with slanted surfaces rapidly accumulate exhaust particulates for capacitance variation detection.

A knock sensor analyzes engine vibration signals to derive precise valve wear measurements for proactive maintenance scheduling.

A differential pressure sensor abnormality detection method controls an engine throttle valve to establish a stable pressure baseline for accurate diagnostics.

A method calculates current oxygen loading in a three-way catalytic converter using pre-converter lambda probe signals and air mass flow integration.