Internal-Combustion Engine Testing TRIZ Cases
- Injector Corrosion Estimation via Reference Flow Comparison
A reference injector compares static fuel flow rates to estimate corrosion levels without extra sensors.
- Corona Discharge Ignition Combustion Start Detection
Evaluates electrical resonance extrema to identify combustion start, filtering noise via crankshaft angle intervals for precise ignition timing.
- Evaporation Gas Active Purge System for Turbocharged Engines
Active purge system pressurizes evaporation gas from canister to intake pipe, enabling nonlinear flow adjustment under turbocharger negative pressure.
- Optical Combustion Pressure Sensor with Ceramic Insulation
Dual optical fibres separate pressure and temperature signals, resolving thermo-shock distortion while maintaining accuracy above 540 °C.
- Engine Combustion Control for Vibration Reduction
A combustion control device calculates vibration levels to correct fuel injection timing and amount.
- Soot Monitoring for Stationary Diesel Particulate Filters
A monitoring system tracks exhaust temperature and operating time to predict particulate filter regeneration needs.
- Crankshaft Angular Velocity Variation for Engine Fault Diagnosis
A misfire monitor detects crankshaft angular velocity variations during cranking to identify cylinders with insufficient compression pressure.
- Exhaust Gas Sensor Cylinder-Selective Misfire Detection
An exhaust gas sensor measures oxygen content to produce cylinder-selective profiles for combustion misfire identification.
- Vehicle Exhaust Catalyst Poisoning Detection via Temperature Feedback
A vehicle exhaust temperature sensor with a catalyst material detects sulfur pollution through exothermic reaction heat.
- Variable Valve Mechanism Abnormality Diagnosis via Exhaust Gas Pressure
A variable valve mechanism diagnosis device estimates exhaust gas returning amounts using pressure sensors to detect mechanical faults.
- Low-Pass Filter Combustion Signal Processing for Engine Control
A low-pass filter generates a difference signal from pressure measurements to detect combustion start.
- Magnetic Sensor Fault Signaling via Pulse Pattern Encoding
A magnetic sensor encodes fault status into specific pulse patterns within its output signal.
- Intake Air Temperature Sensor for Fuel Vapor Pipe Abnormality Detection
An intake air temperature sensor detects fuel vapor pipe abnormalities by monitoring temperature changes in the intake stream.
- Same-Side LIDAR Vehicle Emission Sensing
A same-side optical setup uses road surface reflection to determine exhaust concentrations, eliminating complex opposite-side installation.
- Compressor Emissions Monitoring via Optical Gas Imaging
A control hub integrates emissions analyzers and leak detection cameras to monitor natural gas compressor packages.
- Reductant Delivery Diagnostics Using Pressure Sensors
A reductant delivery diagnostic system compares upstream and downstream flow rates using pressure sensors to detect component malfunctions.
- Engine Imbalance Detection via Generator Frequency Analysis
A controller analyzes generator output frequency to detect engine shaft torque variations and rotational speed changes.
- Exhaust Gas Analyzer Vacuum Calibration
Vacuum-based calibration establishes a reliable zero reference for infrared exhaust gas analyzers, resolving contamination issues in automatic calibration.
- Exhaust Gas Sensor Delay Estimation Using Fuel Injection Ramping
Compensating oxygen sensor delay estimates with measured fuel injection ramping time improves measurement precision while reducing monitoring system complexity.
- Ammonia Sensor Accuracy Correction for Exhaust Gas Humidity
An ammonia sensor system uses an air humidity sensor and a calibration table to correct NH3 readings affected by water vapor interference.
- Manifold Pressure Monitoring for Variable Displacement Engine Diagnostics
Detecting resonance patterns in manifold pressure isolates specific degraded valves, resolving the trade-off between diagnostic precision and system complexity.
- EVAP Canister Testing via Fuel Vapor Density Control
Gas density meters measure fuel vapor concentration to control supply valves, resolving measurement accuracy trade-offs that cause atmospheric breakthroughs.
- Crank Signal Error Detection Using Cam Interval Counting
A crank tooth counter increments pulses and compares counts to expected values derived from cam signal intervals.
- Dry Film Lubricant for Temperature Sensor Attachment Member
Applying a polycarbosilane dry film lubricant to sensor attachment surfaces reduces friction, enabling secure fastening at high temperatures without loosening.
- High Pressure Cavitation System Clamping Assembly
Clamping assembly compresses optical plates to enable high pressure fuel flow visualization.
- Diagonal Electrode DPF Sensor for Accurate PM Detection
Internal diagonal electrodes increase capacitance magnitude and eliminate housing interference for accurate average PM deposit detection.
- Engine Torque Estimation Using Cylinder Pressure Timing
A cylinder pressure sensor detects internal pressure during the exhaust stroke to calculate indicated and pump loss torque values for engine control.
- Gas Turbine Dynamic Characterization via Pulsed Air Injection
Pulsed air injection excites gas turbine engines to measure dynamic structural responses, resolving test complexity without mechanical interference.
- Robotic Probe Scanning for Engine Exhaust Pollutant Measurement
Continuous robotic probe scanning eliminates manual mapping steps and accelerates reliable exhaust pollutant measurements across varying engine outlets.
- OBD-II Engine Monitoring Device for Accurate Simulation
A vehicle monitoring device simulates engine performance by reading standard and non-standard parameter identifiers from the OBD port.
- Engine Ignition Control Unit Misfire Detection via Speed Variation
An engine ignition control unit detects misfires and igniter abnormalities using an engine speed variation detector.