Fuel Injection Control Device Valve Timing Correction

The patent introduces an intermediary approach by detecting valve opening timing not through current inflection points (which fail under high voltage), but through alternative parameters such as voltage changes or mechanical position sensors that can accurately reflect valve opening without being affected by magnetic saturation. This intermediary detection method bridges the gap between high-speed actuation and accurate timing detection.

The patent replaces the electrical detection method (current inflection point) with an alternative detection approach that is not subject to magnetic saturation. This could involve using mechanical position sensors, optical sensors, or voltage-based detection methods that can reliably indicate valve opening timing even when the solenoid is operating in the magnetic saturation region.

The patent makes the detection system multi-functional by using a single detection mechanism that can identify both valve opening timing and valve closing timing. This universal detection approach allows the system to monitor both critical timing parameters without requiring separate detection systems, thereby maintaining simplicity while improving injection quantity stability through comprehensive timing correction.

The patent implements feedback control by detecting both valve opening and closing timings, comparing them against target values, and correcting deviations in the drive command pulse width. This closed-loop feedback mechanism ensures that variations in either timing parameter are compensated, thereby stabilizing the fuel injection quantity while maintaining reasonable system complexity.