Internal-Combustion Engine Testing TRIZ Cases

Detects motor faults by analyzing actuator control signals, avoiding stability issues from narrow band-pass filters in the regulation loop.

Dual NOx sensors measure total nitrogen oxide levels upstream and downstream of an exhaust treatment element to derive specific NO2 concentration data.

A humidity sensor protrudes from a bypass housing into the main intake passage to detect air moisture levels directly.

One-class classifiers isolate specific vehicle subsystem faults by comparing measurement data against healthy operation classes.

A capacitor in series with a particulate matter detection sensor measures voltage to resolve resistivity variations that degrade accuracy and slow detection.

A ceramic capillary bonded to an ion probe metal sheath with an organic adhesive layer protects the internal insulation powder.

A coupling health monitoring method estimates stiffness and damping by adjusting cylinder-wise fuel injection to excite torsional vibrations.

A refueling event detection system diagnoses performance by calculating fuel change amounts and consumed fuel since the last refueling event.

Laser light closes openings in diffusion channels of a semiconductor gas sensor, calibrating flow properties without manual adjustment.

Optical sensors measure exhaust gas constituents via light absorption to diagnose aftertreatment performance in high temperature environments.

Detects engine faults through exhaust gas analysis, maintaining safe vehicle spacing when V-to-V communication fails.

A non-intrusive oxygen sensor system detects cylinder air-fuel ratio imbalances using filtered voltage signals and dynamic thresholds.

Optimized inner and outer cover hole ratios combined with a hydrophobic coating prevent water adhesion that causes cooling and cracking of the sensor element.

A predictive model estimates in-cylinder temperature and pressure to determine crank angle resolved flame velocity for spark ignition engine control.

A controller monitors turbocharger speed signals to detect shaft imbalances and trigger protective actions.

Automated particle concentration analyzing system integrates condensation counters with on-board diagnostics for accurate emission testing.

Displaced connection axes on sensor metal terminals eliminate assembly gaps, enabling reliable welding and improving manufacturing productivity.

Digital processor calculates sensor current and resistance to adjust output voltage, reducing stabilization time delays.

Wireless spherical sensors measure dynamic pressure to resolve high-pressure spray resolution limits.

A fuel pressure noise diagnosis device calculates a differential waveform from sensor data to detect interference signals.

A ceramic sensor unit uses a two-step taper hole portion to guide lead wires into insertion sections.

A crank angle sensor acquires chronological waveform amplitude data to estimate engine torque via a mathematical model.

Engine control unit infers fuel supply cutoff valve status by measuring operating parameter changes during commanded closure sequences.

A rotary beam engine test device rotates the engine to evaluate lubricating system stability under dynamic conditions.

Diagnostic method verifies gear-driven fuel pump timing by measuring rail pressure at discrete crank angles, preventing unstable flow caused by misalignment.

A Venturi tube probe isolates negative pulses from resonant frequency interference to generate accurate misfire waveforms.

A particle filter diagnosis method accumulates temporal integrals of emission-correlating parameters to detect sensor loading states.

A digital control system manages heater current in nitrogen oxide sensors using microcontrollers and pulse width modulation.

A test method isolates individual cylinder torque by comparing deceleration rates during fuel-interrupted and active cycles.

A sensor control device calculates compensation coefficients using oxygen concentration data collected while the internal combustion engine runs.

Integrally coupled fluid shield deflects liquid away from sensor probe outlet, preventing fluid intrusion damage while maintaining exhaust gas flow.

A fuel injection pressure sensor detects near-nozzle fluctuations to control injection states.