Internal-Combustion Engine Testing TRIZ Cases

A reference injector compares static fuel flow rates to estimate corrosion levels without extra sensors.

Evaluates electrical resonance extrema to identify combustion start, filtering noise via crankshaft angle intervals for precise ignition timing.

Active purge system pressurizes evaporation gas from canister to intake pipe, enabling nonlinear flow adjustment under turbocharger negative pressure.

Dual optical fibres separate pressure and temperature signals, resolving thermo-shock distortion while maintaining accuracy above 540 °C.

A combustion control device calculates vibration levels to correct fuel injection timing and amount.

A monitoring system tracks exhaust temperature and operating time to predict particulate filter regeneration needs.

A misfire monitor detects crankshaft angular velocity variations during cranking to identify cylinders with insufficient compression pressure.

An exhaust gas sensor measures oxygen content to produce cylinder-selective profiles for combustion misfire identification.

A vehicle exhaust temperature sensor with a catalyst material detects sulfur pollution through exothermic reaction heat.

A variable valve mechanism diagnosis device estimates exhaust gas returning amounts using pressure sensors to detect mechanical faults.

A low-pass filter generates a difference signal from pressure measurements to detect combustion start.

A magnetic sensor encodes fault status into specific pulse patterns within its output signal.

An intake air temperature sensor detects fuel vapor pipe abnormalities by monitoring temperature changes in the intake stream.

A same-side optical setup uses road surface reflection to determine exhaust concentrations, eliminating complex opposite-side installation.

A control hub integrates emissions analyzers and leak detection cameras to monitor natural gas compressor packages.

A reductant delivery diagnostic system compares upstream and downstream flow rates using pressure sensors to detect component malfunctions.

A controller analyzes generator output frequency to detect engine shaft torque variations and rotational speed changes.

Vacuum-based calibration establishes a reliable zero reference for infrared exhaust gas analyzers, resolving contamination issues in automatic calibration.

Compensating oxygen sensor delay estimates with measured fuel injection ramping time improves measurement precision while reducing monitoring system complexity.

An ammonia sensor system uses an air humidity sensor and a calibration table to correct NH3 readings affected by water vapor interference.

Detecting resonance patterns in manifold pressure isolates specific degraded valves, resolving the trade-off between diagnostic precision and system complexity.

Gas density meters measure fuel vapor concentration to control supply valves, resolving measurement accuracy trade-offs that cause atmospheric breakthroughs.

A crank tooth counter increments pulses and compares counts to expected values derived from cam signal intervals.

Applying a polycarbosilane dry film lubricant to sensor attachment surfaces reduces friction, enabling secure fastening at high temperatures without loosening.

Clamping assembly compresses optical plates to enable high pressure fuel flow visualization.

Internal diagonal electrodes increase capacitance magnitude and eliminate housing interference for accurate average PM deposit detection.

A cylinder pressure sensor detects internal pressure during the exhaust stroke to calculate indicated and pump loss torque values for engine control.

Pulsed air injection excites gas turbine engines to measure dynamic structural responses, resolving test complexity without mechanical interference.

Continuous robotic probe scanning eliminates manual mapping steps and accelerates reliable exhaust pollutant measurements across varying engine outlets.

A vehicle monitoring device simulates engine performance by reading standard and non-standard parameter identifiers from the OBD port.

An engine ignition control unit detects misfires and igniter abnormalities using an engine speed variation detector.

A gas sensor uses a constant diameter reduced portion to swage an elastic body from the periphery.

A diagnostic method measures battery-alternator current changes during fan speed transitions to detect degradation without extra sensors.

Sensors compare downstream cooling air pressure against expected values to identify potential concerns in the gas turbine engine cooling system.

A laser gas analyzer detects oxygen levels via light absorption, reducing response delays that limit combustible gas recovery.

Diagnostic system detects coolant temperature trends during high power engine operation to identify thermostat faults.

Analyzing transient pressure dips and steady-state changes in the crankcase vent tube identifies breach locations without adding hardware complexity.

Unmanned aerial vehicle flies through vessel exhaust plumes to measure gas concentrations and particle counts.

An instrument calculates probe offsets using calibration jigs to resolve measurement inaccuracies in engine cylinder bore radius analysis.

Determining combustion gas composition via nitrogen oxide emission, exhaust temperature, and air ratio measurements.

Diagnostic unit assesses error occurrence frequency across driving cycles to identify misuse and activate restricted operating modes.

A control circuit estimates exhaust manifold pressure and temperature using flow values and cooler sensor signals.

Segmented sensor fastening device enables flexible angular positioning for exhaust gas sensors, preventing condensate corrosion.

A control system validates pressure difference readings against a charging pressure characteristic map to ensure accurate sensor data.

A gas sensor uses a taper surface and projection to fix metal terminals securely within the separator.

Integrating instantaneous angular accelerations from a 58-tooth speed sensor to identify pre-ignition events in internal combustion engines.

A sensing unit mounts to the timing cover to align crankshaft and camshaft sensors.

Dynamic threshold adjustment prevents false misfire detection in dual mass flywheel systems.

A fuel consumption calculation unit adjusts exhaust gas density based on air-fuel ratio to compute engine fuel usage directly from sensor data.

Type-specific thresholds for acceleration and jerk distinguish misfires from road inputs, reducing false alarms.