Internal-Combustion Engine Testing TRIZ Cases

Protruding concave edge increases sealing member contact area, resolving insufficient seal reliability in gas sensors.

A linear encoder detects piston shaft displacement to determine cylinder pressure without direct sensor exposure.

A non-contact optical process measures carbon deposit thickness on engine surfaces using light reflection through a viewing window.

Phonic wheel signals enable algebraic MFB50 estimation without pressure sensors, reducing device complexity.

Continuous wavelet transformation of block vibration signals determines combustion timing, avoiding expensive high-temperature sensors.

Self-service SCR diagnostics identify specific urea injection faults without mechanical intervention, maintaining vehicle operation.

A particulate matter sensor measures heater lead resistance via a dedicated sensing line to derive precise temperature data.

A sensor uses electrostatic capacitance changes between electrodes to estimate particulate matter accumulation in exhaust gas.

Refrains from normal determinations during large working angles to prevent erroneous readings and ensure accurate imbalance detection.

Mid-wave infrared camera captures exhaust plume images to determine carbon monoxide and carbon dioxide concentrations via spectral absorption.

Calibrates waste gate position sensors via end-stop detection routines, reducing noise and vibration from valve impact.

A humidity sensor adjusts lambda value calculations to compensate for rapid moisture fluctuations in intake air.

Computational NOx model predicts engine-out emissions using operating parameters, eliminating expensive sensor hardware and maintenance costs.

Segmented catalysts and dynamic valves route exhaust for fast light-off, resolving the trade-off between conversion efficiency and system durability.

A diesel fuel injector disablement method uses engine control module signals to stop injection during cranking.

Co-located sensors eliminate time delays between concentration and flow rate data, reducing synchronization errors under transient conditions.

Segmenting misfire data into distinct patterns reduces diagnosis time and improves accuracy for non-repeating faults.

A charge air cooler detection method calculates a temperature ratio across segmented circuit zones to verify cooler efficiency.

Replacing physical pressure checks with chemical reaction analysis to verify catalytic reactivity.

Intake manifold pressure and crankshaft acceleration signals detect induction faults to reduce emissions from unburnt hydrocarbons.

A particle detection sensor uses a heater portion to burn adhering particles during specific operational periods.

A humidity sensor uses temperature and humidity changes to detect water droplets on the element surface.