Internal-Combustion Engine Testing TRIZ Cases
- Engine Control Device Ignition Timing Detection via Vibration Filtering
Electronic control unit detects ignition timing using vibration sensors tuned to specific frequency bandwidths for precise fuel injection.
- Lambda Probe Fuel Discharge Detection in Engine Oil
Comparing actual and setpoint lambda deviations detects fuel discharge, preventing incorrect fault diagnoses during ethanol proportion measurement.
- Voltage Offset Detection in Two-Point Lambda Sensors
Correct voltage offset in two-point lambda sensors by analyzing delay times during air fuel mixture transitions to maintain precise lambda regulation.
- Throttle Position Sensor Assembly Press-Fit Integration
Replacing laser welding with a cold press-fit method eliminates material warping and reduces manufacturing costs while maintaining precise sensor alignment.
- Internal Combustion Engine Emission Check Control
A control device manages combustion cycles to verify emission reduction system functionality through periodic exhaust gas analysis.
- Oxygen Sensor Heater Voltage Integration for Cold Start Control
Integrating heater voltage estimates sensor resistance to accelerate warm-up, reducing hydrocarbon emissions from open-loop cold starts.
- Engine Manifold Sensor Shielded Sensing Component
Partial upstream shield blocks exhaust contaminants while maintaining direct air exposure for accurate responsiveness.
- Crankcase Vent Tube Pressure Sensor PCV Valve Degradation Detection
Correlating crankcase vent tube pressure with intake manifold pressure isolates PCV valve degradation signals from engine load noise without additional sensors.
- Piston Rim Damage Counting via Combustion Sensor Feedback
Controller calculates heat flux and temperature at the piston rim to track cumulative damage, addressing inadequate real-world monitoring methods.
- Exhaust Gas Inspection Method Using Constant Operating Modes
A portable measuring system determines exhaust gas characteristics by verifying constant engine operating modes and analyzing emission values.
- Gas Sensor Inner Cover Louver Design for Cylinder Imbalance Detection
Inner cover louver directs measurement gas flow toward the sensor element, preventing inter-cylinder gas mixing that reduces air/fuel ratio detection accuracy.
- Gas Sensor Lambda Determination Using Temperature-Compensated Thresholds
A gas sensor determines lambda air ratio using a temperature-dependent threshold for initial inverse voltage.
- Catalytic Converter Diagnosis via Cold Wave Axial Positioning
Cooler exhaust gas forms a cold wave through the converter, enabling precise detection of regional damage location and storage capacity loss.
- Early Camshaft Position Detection Using Crankshaft Rotation Proxy
System determines camshaft position by analyzing crankshaft signals and tooth patterns, reducing detection latency in four-stroke engines.
- Crank Angle Sensor Signal Processing for MFB50 Estimation
Compensating manufacturing tolerances in crank angle data enables accurate MFB50 estimation, reducing reliance on expensive cylinder pressure sensors.
- Electrochemical Sensor Transient Error Compensation
Processor estimates transient errors from reference gas changes to maintain species concentration measurement accuracy.
- Segmented Gas Sensor Heater for Temperature Stability
A segmented gas sensor heater uses varying resistance per unit area to stabilize the temperature around the sensor electrode.