Internal-Combustion Engine Testing TRIZ Cases

A gas sensor control device corrects determination values using environmental parameters to improve diagnosis accuracy.

A heater plug uses a membrane to transmit pressure from a metal finger to a sensor while isolating elastic vibrations.

Deliberate air-fuel ratio perturbations generate distinguishable exhaust signals for real-time sensor sensitivity and transport time determination.

Alternating valve cycles control reagent flow volume to enable precise pressure measurements during emission treatment system diagnostics.

Comparing actual and required heating power during the heating phase resolves unreliable diagnosis caused by inaccurate temperature detection.

Segmenting the outer electrode with a porous layer and dense barrier suppresses transient noise currents during oxygen concentration adjustments.

An optical sensor inside a fuel injector detects cavitation light intensity to measure injection parameters.

Resistive element and bandpass filter extract ionization current waveform features from spark discharge noise.

Air-fuel ratio calculation device adjusts output using sensor impedance and integrated electric power values.

An operations support system calculates engine noise levels using thermodynamic diagnostics data and displays results for operator review.

Dual sensors upstream and downstream detect differential NOx concentrations to determine oxidation catalyst efficiency.

A coolant monitoring system calculates short and long term leak rates to identify leakage states and notify operators of potential failures.

Polyphenylene sulfide resin molded bodies suppress capacitance variation and detection accuracy loss in knocking sensors operating above 150°C.

An ignition system uses ion sensing to detect misfires and optimize combustion control.

Diagnostic apparatus calculates misfire parameters from opposing and reference cylinders to determine engine faults.

Ultraviolet light source generates ozone from exhaust gas oxygen for nitrogen oxide analysis.

Diagnostic apparatus analyzes sine and cosine signal sums to verify rotational angle states without triggering unnecessary fail-safe transitions.

Iterative inefficiency calculations compensate for sensor cross-sensitivity to eliminate false fault triggers in SCR diagnostics.

Vibration sensors detect wheel conicity and propulsion damage by analyzing frequencies based on operational speed, reducing maintenance costs.

A misfire detection system assigns windows to firing opportunities and measures crankshaft angular acceleration.

A magnetic field sensor calibration method computes an adaptive detection threshold using signal amplitude ratios to correct tooth edge detection.

A heat flux sensor measures thermal energy across chamber walls to determine internal fluid pressure states without physical intrusion.

A state detection system selects mapping data based on road surface conditions to isolate crankshaft rotational speed variations from engine combustion states.

Bias electrodes supply voltage to form an electric field that concentrates exhaust gas particles, reducing signal generation time and noise interference.

Monitoring instantaneous and average fuel pressure gradients localizes faults in high or low pressure systems, eliminating unnecessary component replacement.

Converting analog vibration signals to audio data eliminates expensive specialized hardware requirements while maintaining measurement precision.

A control device analyzes kinetic energy and piston motion signals to detect combustion processes using characteristic Fourier component signatures.

Periodic heating pulses enable electronic circuitry to determine gas species and concentration, reducing power consumption while maintaining detection accuracy.

A microprocessor adjusts pulse-width-modulated heating signals to specific internal resistance values for oxygen sensor regeneration.

A control device stops air-fuel ratio estimation and correction when engine misfires occur.

A sampling control module directs exhaust gas to clean or dirty circuits based on engine status.

Control unit transforms log-normal detonation energy distributions into Gaussian models for precise spark advance adjustment.

A concave collection part traps exhaust particles near detection electrodes, preventing rebound and improving collection efficiency.

A controller analyzes oil temperature signals to detect bearing overheating, preventing catastrophic engine damage without adding complex mechanical sensors.

A hybrid powertrain system integrates a motor generator with a diesel engine to provide brake torque and enable emissions testing.

Optical remote sensing detects exhaust plume absorption to measure emissions, bypassing defeat devices triggered by physical connections.

A resistive sensor measures exhaust soot accumulation via electrical resistance changes for real-time monitoring.

Segmented diagnostic tool simulates system failures to determine root causes of fuel pump issues without vehicle installation.

Dynamic synchronization between crankshaft and camshaft sensors detects reverse rotation by switching modes, preventing fuel injection errors.

Deterioration determination apparatus for airflow meters stabilizes engine driving conditions to isolate measurement errors caused by sensor stains.

An engine misfire detection device uses rotational speed change thresholds to identify combustion faults in real time.

An electric motor replaces combustion forces in a live engine test bench, enabling accurate endurance cranking tests while eliminating exhaust emissions.

Mounting a fluid quality sensor to a pump output side measures exhaust fluid properties at the injection point, resolving cold temperature measurement errors.

Temperature-standardized pressure vectors enable accurate particle filter diagnostics by isolating flow anomalies from thermal variations.

A fuel injector diagnostic method sweeps injection parameters to balance cylinder torque and identify degradation.

Composite metal rod and ceramic coating maintain sensitivity across broad temperature ranges while resisting fuel quality variations.

A centralized device analyzes multiple liquid and gas flows using a shared near-infrared light source and detector to reduce system bulk.

An electrostatic particulate matter sensor analyzes undiluted gas samples via a dedicated sampling line to detect visible emissions from combustion stacks.

Bypass flow routes trap exhaust particulates for electromagnetic detection, preventing antenna adhesion that reduces sensitivity in diesel engine filters.

A system estimates exhaust manifold temperature using fuel and air signals to calculate mean effective pressure and thermal change rates.