Internal-Combustion Engine Testing TRIZ Cases
- Pressure Sensor Temperature Compensation via Differential Signal
A pressure sensor uses two identical elements to generate a differential signal that isolates mechanical stress from thermal effects.
- Compressor Equipment Controller Monitoring and Protection
Equipment controller detects deviations in pressure and temperature, directing gas to sensors or shutting down the compressor to maintain safe operating limits.
- Optical Sensor Piston Wear Detection Threshold
Optical sensor measures piston reference mark color intensity to warn drivers before chromatic contrast drops below detection thresholds.
- Gas Sensor Dual Protection Cover with Inner Outer Gas Holes
A gas sensor uses a dual protection cover with specific inner and outer gas hole configurations to regulate flow.
- Injection Valve Timing Model Training via Difficulty Classification
Classifying training data by difficulty resolves timing determination uncertainty in internal combustion engines, improving fuel injection precision.
- Air Flow Measurement Device Bypass Passage Counter Flow Management
Hole portion in bypass passage returns counter flows to intake stream, maintaining measurement accuracy despite exhaust gas recirculation pulsation.
- Coated Particulate Filter Sulfur Detection via NOx Efficiency
A coated particulate filter determines exhaust sulfur content by measuring nitrogen oxide abatement efficiency changes.
- Cylinder Compression Ratio Adaptation via Cuff-Ring Selection
Selecting a cuff-ring with specific contours scrapes piston deposits to adapt cylinder compression ratio, reducing manufacturing deviation and wear.
- Engine Knock Sensor Vibration Analysis for Peak Firing Pressure
A knock sensor detects cylinder vibrations to deduce peak firing pressure operating values.
- Interdigital Comb Sensor With Non-Equidistant Electrodes
A sensor uses an interdigital comb structure with varying finger electrode distances to attract particles from multiple gas flow layers.
- Gas Sensor Counter Plate With Gradient Sintered Density
Gradient sintered density in the counter plate prevents cracking without increasing activation time.
- Air Flow Rate Measuring Apparatus Heater Cleaning Control
Built-in control circuit raises heater temperature above measuring mode during startup to clean deposits without external circuits, maintaining accuracy.
- Instantaneous EGR Mass Flow Estimation Using Crank Angle Sampling
Estimates instantaneous exhaust gas recirculation mass flow by sampling pressure and temperature at fixed engine positions.
- Uncontrolled Combustion Detection and Mitigation in Internal Combustion Engines
Counting uncontrolled combustions against a threshold triggers combustion chamber cooling, preventing engine damage from auto-ignition pressure spikes.