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.

A lambda controller adjusts fuel mass using modified proportional and integral parameters to perform cylinder-specific diagnosis.

A control device regulates heating power to drive tank pressure rise, enabling measurement of the initial phase duration for ammonia quantity determination.

Electronic control unit manages misfire frequency measurements for internal combustion engines.

Segmenting sensing circuits into n-type and p-type layers sharing one electrode resolves size constraints while maintaining measurement precision.

A control apparatus detects rotational speed parameters to identify single misfires in individual cylinders and corrects ignition timing.

Offset flange end faces distribute thermal stress across the insulator and housing support structure.

A vacuum pressure regulation method detects small leaks in evaporative emissions systems using pulse width modulation control.

A remote sensing device measures in-use vehicle emissions to verify onboard diagnostic fault codes.

A dynamic engine testing method finalizes operating levels based on physical parameter stability criteria.

A pre-chamber engine knocking determining device segments main chamber pressure amplitudes into sections before and after maximum in-cylinder pressure.

A virtual turbine speed sensor estimates rotational velocity using compressor efficiency and inter-stage air temperature data.

A diagnostic device compares theoretical and apparent engine stability terms to identify generalized misfires.

An automatic diagnosis system processes sensor data to resolve the trade-off between high measurement precision and ease of operation for non-expert users.

A diagnostic system measures injector valve closing time to identify mechanical failures in engine cylinders.

A control unit ascertains static fuel flow rate and rotational speed fluctuation for each injector to detect component errors.

A sensor housing with a non-regular polygon engaging part enables precise screw-fixing positioning.

A misfire detection apparatus adjusts phase compensation based on crankshaft rotation speed to align downstream-side and crank-side speeds.

A specific sound generator produces ultrasonic pulses synchronized with cylinder top dead center to enable precise noise timing estimation.

A misfire detection system measures crankshaft angular acceleration during target firing opportunities to identify engine errors.

Electronic control unit monitors sensor data to detect in-range drift and impending failures through rationality checks.

Segmented housing connection elements join sheet metal and precision cast parts via laser welding to resolve manufacturing complexity and stability trade-offs.

Maintenance system uses intermediary adapter to perform in-situ electrical and hydraulic measurements, eliminating component removal.

A non-invasive device measures gas needle valve lift and injection law simultaneously using an eddy current displacement sensor and a constant volume sealed container.

Segments exhaust gas flow to calibrate sensors without exceeding legal pollutant limits.

A mechanical link changes RFID impedance to detect vibration, preventing catastrophic failure without adding engine controller complexity.

Controller reduces catalyst overheating by adjusting fuel and air ratios when misfires exceed thresholds.