Internal-Combustion Engine Testing TRIZ Cases

A misfire detection device measures unburned fuel concentration in the exhaust gas duct to determine effective misfire risk.

Low-pass filtering of air mass flow enables robust crankcase ventilation fault detection using differential pressure sensors with relaxed tolerances.

A control apparatus calculates mass fraction burned data from in-cylinder pressure to execute feedback engine control.

Spectral analysis of engine lateral displacement detects misfires, reducing system complexity and cost while maintaining high measurement precision.

An integral ambient air pressure sensor mounts directly on the sealed engine control module housing to detect atmospheric conditions.

Positioning the sensor above a flange section and behind the driveshaft prevents water ingress and pebble impacts, maintaining long-term performance.

A misfire determination device subtracts torsional resonance components from output shaft rotational speed signals to isolate true engine fluctuations.

A vibration inhibiting member supports metal terminals within a gas sensor separator to reduce inward sway.

Local monitoring device captures engine vibrations and transmits aggregated summaries to a remote application, eliminating local storage requirements.

Dynamic steering actuators in the optical reading head compensate for disc eccentricity, resolving measurement precision versus device complexity.

A particulate matter sensor compares its temperature against a dynamic threshold derived from engine operating parameters to verify mounting integrity.

A supercharger rotation speed measurement unit calculates a misfire index from rotational changes to identify engine faults.

Pitch-varying units adjust seal head intervals to test multiple engine types without separate devices.

Integrated sensor cell subtracts residual oxygen ion current from measurement value, eliminating material mismatch errors in NOx detection.

A multi-channel optical measuring probe detects flame light signals across several detection volumes to enable precise spatial analysis.

A broadband lambda sensor method assigns short-circuited lines via limiting resistors and potential comparison.

A particle monitor counts dispersed particles during cleaning to quantify adhesion states.

A fuel system checks negative pressure relief valve position using existing sensors to verify mobility.

A control unit detects chamber pressure using a global matrix of transfer matrices to estimate oscillation frequencies.

An integrated substrate merges sensing elements and signal conditioning circuitry to reduce system complexity while maintaining measurement precision.

A method for diagnosing motor vehicle oxygen sensors by varying fuel richness setpoints to detect measurement errors.

An engine control unit learns actual trigger wheel tooth dimensions to set dynamic time ranges for position sensor validation.

Elevating voltage after regeneration distinguishes sensor poisoning from low soot levels, ensuring accurate diesel particulate filter diagnostics.

A pressure sensor adaptor uses a non-linear channel to access engine cylinders without modifying the head.

Aligns pressure sensors in mobile exhaust gas analysis systems to cancel acceleration errors, ensuring accurate sample flow rate control.

A rapid compression-expansion machine uses a motor-driven piston and multi-injector assembly to replicate marine engine thermodynamic conditions.

Deep learning classifiers analyze engine vibration signals to classify abnormal states, preventing defective engines from reaching customers.

Laser absorption spectroscopy replaces slow extractive sampling to eliminate measurement lag during transient SCR operation.

A hydrocarbon gas sensor measures electromotive force changes downstream of an oxidation catalyst to generate a diagnosis index value.

An absolute angle sensor measures camshaft rotation to enable precise valve timing control in internal combustion engines.

A health monitoring system for engine cooling manages coolant temperature assessment by detecting transient conditions and applying delay logic.

A diagnostic system determines hydraulic stiffness values from pressure variations to identify malfunctioning dosing units in fluid systems.

A pressure sensor monitors secondary air system pressure to assess functional capability.

A degradation simulator generates pseudo-degraded sensor output signals by applying variable time constant and dead time delays to gas sensor readings.

Structural damage monitoring method for small turboshaft engines using fluorescent penetration and CT scanning to assess component health.

A dynamometer control device computes a correction torque command value by subtracting measured torque from the torque command to improve rotational frequency accuracy.

A closed-loop system maintains fuel viscosity using a rotating cylinder sensor and heat exchanger.

Adaptive frequency pulsed current measures internal resistance, minimizing polarization effects that distort signals and delay lambda control activation.

Smooth curved upstream and downstream throttles reduce airflow exfoliation to minimize output fluctuations and enhance measurement accuracy.

An oxygen sensor monitors exhaust gas to trigger automatic engine shutdown.

A misfire determination device sets the detection period within a positive torque range to maintain accurate average torque calculations.

A dual neural network system calculates predictive knocking intensity differences to adjust ignition timing precisely.

Correction means determine transit time of pressure waves to rectify injection rate measurements, resolving noise filtering trade-offs.

Inverting bent portion orientation toward the base end improves heat resistance while decreasing sensor device length.

Feed forward control compensates for actuating dynamics to decouple rotational speed and torque profiles during dynamic test runs.

Continuous pressure measurement compares against stored references to identify partial injector blockage, maintaining pollution control process continuity.

A catalyst deterioration diagnosis device detects faults by comparing upstream and downstream nitrogen oxide concentrations against a reference temperature threshold.

Differential oil pressure analysis identifies high-pressure common rail pump degradation or filter clogging before engine shutdown occurs.

A dynamometer control unit uses engine output shaft rotation speed to generate torque current commands for inertia compensation.

A hybrid vehicle control system manages engine and energy storage device usage based on operational parameters to optimize fuel efficiency.