Internal-Combustion Engine Testing TRIZ Cases
- Engine Speed Measurement Using Pump Pressure Oscillations
A pressure sensing device detects periodic oscillations in a positive displacement pump inlet to determine engine rotational speed.
- Gas Sensor Thermal Expansion Compensation for Sealing Reliability
A gas sensor uses a powder filler member with a higher thermal expansion coefficient than ceramic holders to maintain pressing force.
- EGR Leakage Detection via Lambda Error Monitoring
A detection system calculates lambda error between measured and estimated air-fuel ratios to identify intake line leaks.
- Misfire Detection Using Engine Vibration Analysis
A control unit identifies misfiring cylinders by measuring engine vibrations generated during operation.
- Gas Sensor Assembly Using Dummy Element to Prevent Film Damage
An element dummy guides annularly-mounted members into position, preventing displacement and protecting the sensor's end portion film during vertical descent.
- NOx Sensor Diagnosis Device Preventing Erroneous Detection
A NOx sensor diagnosis device calculates expected concentration values to verify sensor validity against detected readings.
- Unbalanced Accessory for Crankshaft Deflection Reduction
An unbalanced accessory mounted on the crankshaft output generates centrifugal force to counteract rotating assembly deflection.
- Gas Turbine Trim Balancing via In-Flight Vibration Signals
Integrated electronic sensors detect flight vibrations to guide real-time trim balancing, eliminating time-consuming ground-based maintenance iterations.
- Multi-Fuel Engine Misfire Detection via Torsional Vibration
A misfire monitor detects cylinder anomalies using crankshaft torsional vibration signals to tune liquid fuel injection rates for stable combustion.
- Vehicle Controller Rough Road Detection Misfire Validation
A vehicle controller calculates front and rear wheel speed differences to detect rough road conditions using signal processing techniques.
- Misfire Detection Device for Internal Combustion Engine
A misfire detection device adjusts determination positions based on crankshaft rotation speed to improve accuracy across varying engine loads.
- Mobile CNG Vessel and Unloader for Compressor Emissions Testing
A mobile compressed natural gas vessel supplies fuel to a compressor while an unloader recirculates output gas to maintain optimal pressure.
- Blow-by Gas Breather Circuit Disconnection Detection
A pressure sensor monitors the blow-by gas breather circuit to identify pipe disconnections through signal processing.
- Cylinder Pressure Sensor Gain and Offset Diagnostics
A sensor module acquires cylinder pressure data while an offset diagnostic module determines sensor offset by comparing actual and reference pressures.
- Threaded Temperature Reducing Member for Pressure Sensor Cleaning
Threaded engagement between segmented temperature reducing members allows removal of incomplete combustion products without compromising sealing integrity.
- Textured Shroud Tortuous Path for Ultrasonic Sensor Aeration
A textured shroud with a tortuous path directs liquid to the sensing area while diverting gas bubbles away from ultrasonic sensors.
- Engine Knocking Detection Using Crank Angle Segmentation
A control device segments the knocking window by crank angle to integrate vibration signals for accurate detection.
- Exhaust Gas Analyzer Flow Compensation
Gas analyzer system supplies make-up gas to maintain flow rate accuracy.
- Test Bench Adapter Flange Inertia Tuning for Engine Simulation
Adjusting adapter flange inertia aligns test bench natural frequency with engine operating range, enabling accurate drive train vibration simulation.
- Smartphone Accelerometer Horsepower Measurement
Smartphone accelerometers capture velocity changes during acceleration and deceleration phases to eliminate engine fatigue from chassis dynamometers.
- Marine SO2 Monitor Using Thermo-electric Power and Distributed Sensors
Distributed sensor nodes eliminate expensive ship-mounted installations while confirming fuel switching compliance through accurate real-time monitoring.
- Bypass Catalyst Diagnostic for Fast Cold Start Emissions
A bypass catalytic converter redirects exhaust gas during engine cold starts to achieve rapid light-off temperatures.
- Propulsion Torque Calculation Using Internal Torque Estimation
A propulsion torque calculation method estimates correction torque from internal measurements to resolve noisy shaft signals.
- Movable Gas Distributor for Exhaust Measurement Cabinets
A movable measurement gas distributor connects directly to inlet coupling elements via insertion.
- Detecting SCR Catalytic Converter Emulators via Pressure Profile Analysis
A detection method analyzes pump pressure profiles to identify emulated SCR catalytic converter systems.