Electrical Control TRIZ Cases
- Engine Speed Gradient Detection for Cold Start Fuel Control
A control device determines fuel supply quantity using engine speed gradient measured during starter slowdown phase.
- Fuel-Air Regulator Location for UAV Drag Reduction
Moving the fuel-air regulator to the air compressor housing reduces aerodynamic drag while maintaining pressure differentials via a reference path.
- Variable Compression Ratio Control for Engine Fuel Efficiency
Hydraulic control varies piston top dead center position to maintain combustion pressure limits, improving fuel efficiency across engine loads.
- Vehicle Fuel Cut Control for Incomplete Gear Coupling Noise
A fuel supply control unit executes a fuel cut to reduce engine speed when a coupling state detection sensor identifies an incomplete gear engagement.
- Diesel Engine Injection Timing Control via Pressure-Dependent Interval
Adjusting the injection interval based on fuel pressure aligns after-injection with oxygen arrival, reducing soot while maintaining fuel efficiency.
- Integrated Exhaust Manifold Shutoff for Cylinder Ignition Control
An integrated exhaust manifold shutoff directs hot gas between cylinders to enable reliable ignition across varying load conditions.
- Intake Control System for Maintaining EGR Valve Differential Pressure
Dynamic EGR valve adjustment maintains differential pressure without throttling fresh air, preserving engine torque and drivability.
- Internal Combustion Engine Emission Estimation Without Cylinder Pressure Sensors
An internal combustion engine system estimates pollutant emissions using manifold pressure and coolant temperature data.
- Stationary NOx Monitor Reset for Exhaust Aftertreatment Diagnostics
A stationary NOx monitor reset system compares actual emissions against estimated values to diagnose exhaust aftertreatment health.
- Engine Controller Dither Purge Control Air-Fuel Ratio Deviation
Controller reduces purge flow rate during dither control to prevent uneven fuel vapor distribution and maintain combustion stability.
- Urea Injection Nozzle Crystallization Prevention via Drawing-Back
A drawing-back unit removes urea solution from the injection nozzle supply passage to prevent crystallization.