High Quality Diesel Fuel Injector 095000-6310 Auto Parts

Abstract:
Low-temperature cold-start conditions significantly deteriorate fuel atomization, evaporation, and combustion stability, resulting in increased hydrocarbon emissions, prolonged ignition delay, and poor start-up performance. This study develops an adaptive adjustment mechanism for injector operating parameters tailored to cold-start thermal constraints and transient engine requirements. The proposed method integrates real-time sensing of fuel temperature, ambient temperature, battery voltage, in-cylinder pressure, and injector energizing current to dynamically modify key injection characteristics, including energizing duration, injection pressure, pilot–main–post injection timing, and needle valve lift profiles. A temperature-compensated fuel viscosity model and a nonlinear injector response model are established to correct injection quantity deviation caused by increased viscosity and reduced electromagnetic force in low-temperature environments. A closed-loop adaptive controller based on reinforcement learning and model predictive compensation is designed to ensure optimal injection under highly variable cold-start conditions. Experimental validation on a cold-start test bench demonstrates that the adaptive mechanism reduces injection delay by 18–32%, improves fuel atomization quality by 12–20%, and shortens cold-start time by up to 15%, while maintaining combustion stability. The findings provide an effective control strategy for enhancing injector performance and reducing emissions during low-temperature engine start-up.