Electrical Control TRIZ Cases

A governor lever uses a subsidiary spring to urge the throttle valve open, enabling precise low-speed engine control.

Sets closing valve to fail-safe position when pressure sensor fails, then adjusts stroke to depressurize fuel tank and prevent leakage.

A current source uses a timing relay to limit output current duration and reduce thermal stress on switching elements.

A feedgas NOx sensor diagnoses degradation by monitoring reductant sublimation signals after engine shutdown.

A vehicle speed limit apparatus corrects upper limit values using current drive force to ensure smooth transitions between non-limit and limit states.

A control apparatus computes correction coefficients using weighted average representative values during fuel cut periods to recalibrate sensor output.

A multifuel engine control system selects injection duration maps based on detected fuel viscosity to ensure precise fuel delivery.

A fuel injector recalibration method determines current and required frequencies to schedule retiming events.

Segmented cylinder modes and periodic compression release reduce noise, vibration, and harshness while improving fuel economy.

Filtering non-degraded signal portions by degraded time constants to maintain symmetric engine operation and reduce calibration complexity.

Conical seating geometry guides the needle to open axially, resolving unstable closed loop detection signals caused by misalignment.

Controller extends engine operation with leaner air-fuel ratio to minimize moisture in the exhaust passage after stop.

A camshaft phaser control unit transmits time signals via a dedicated line to an engine controller for precise synchronization.

Restricting the canister vent pathway prevents hydrocarbon emissions during hot refueling while avoiding continuous flow restrictions from secondary traps.

A control system calculates in-cylinder gas amount by correcting ideal values with measured temperature data.

Pilot injection deposits fuel on the duct wall to cool the component, preventing premature self-ignition and improving combustion efficiency.

Engine exhaust sensor timing detects SCR catalyst degradation through lean-rich switch monitoring.

Electronic control unit estimates engine air flow via temperature and pressure sensors, reducing sensor count while maintaining measurement precision.

A downstream gas sensor heater activates early to enable feedback control during low-temperature engine starts.

Partial fuel stratification combined with intake pressure boosting reduces combustion pressure rise rates, enabling higher power output without engine knock.

A vehicle system adjusts fuel filter maintenance intervals by detecting alcohol percentage in the fuel to optimize replacement timing.

Separate injectors handle gasoline during startup and natural gas during operation, resolving flow rate limits while reducing exhaust emissions.

A prime mover control device adjusts maximum engine speed based on torque converter speed ratio to optimize power delivery.

An electric supercharger increases intake boost pressure to support diesel engine acceleration events.

A control device segments the intake passage into unit spaces to estimate exhaust gas recirculation rates using an advection equation.

Controller segments frequency bands to detect engine knocking, suppressing calculation processing load caused by mechanical noise interference.

Segmenting emission control devices by precious metal loading resolves uneven NOx distribution and thermal aging trade-offs.

Dynamic air-fuel ratio switching maintains maximum oxygen storage capacity while reducing precious metal catalyst poisoning during high-load engine operation.

Periodic rich pulse cycling manages reformer temperature range, extending rich duration for effective LNT desulfation without overheating.

A control device switches between throttle valve and EGR valve fresh air amount control to maintain optimal differential pressures.

Diverting exhaust gas through the aftertreatment housing heats the catalyst faster, reducing emissions during cold-start conditions.

Dynamic feedforward control compensates turbo time-lags to improve MAF and MAP followingness, reducing emission increases during engine transients.

An engine control device advances fuel injection timing during compression stroke to reduce liquid fuel remaining on piston crown surface.

A control device adjusts the exhaust gas flow rate ratio between an EGR cooler and a bypass passage.

A fuel injection apparatus adjusts determination values to detect air-fuel ratio faults accurately.

Monitoring intake air SO2 concentration triggers water injection termination to prevent corrosive engine damage from exhaust gas leakage.

A fuel injection actuator method adjusts braking pulse parameters to minimize valve impact speed and component wear.

Monitoring solenoid valve closing time with a sensor and increasing coil current when premature closure occurs to maintain injection accuracy.

Analyzing crankcase pressure fluctuations determines combustion in every cycle, preventing four-stroke mode operation and reducing exhaust emissions.

Dynamic acceleration threshold adjustment prevents drivability deterioration during sensor abnormalities by increasing limits when faults occur.

A rotation speed calculation apparatus adjusts predetermined angles based on engine rotation ranges to enhance measurement precision.

A control unit monitors high-pressure sensor output signals to detect defects without adding hardware.

Real-time sensor feedback adjusts pilot injection parameters to balance combustion stability against NOx emissions across varying operating conditions.

A fuel injector nozzle with dual spray orifice sets and aligned plume ducts adapts injection patterns to engine loads.

A fuel injector coil drive method records chronological electrical variables to determine valve needle movement timing.

A control device compares predicted emissions from an engine model with actual sensor readings to distinguish defective vehicles in varying driving states.

A control unit determines actual fuel quantity using crankshaft acceleration from test pulses to correct injector actuating data.

Current monitoring triggers oxidant injection and ionization cycles to remove varnish from injector-igniter components exposed to alternative fuel contaminants.

A variable filter corrects intake throttle valve opening degrees in an EGR controller to stabilize gas flow.

Intake stroke injection cools air via vaporization, activating catalysts early without high-pressure direct injectors.