Del-phi HDU Series

As the world’s first directly actuated piezoelectric fuel injector, the Delphi HDU series eliminates traditional hydraulic servo circuits by employing revolutionary piezo crystal technology to drive the needle valve directly. This architecture achieves ultra-fast transient response times of ≤0.1 ms and supports injection pressures up to 2000 bar, precisely meeting the demands of both micro-injection at idle and full-load combustion bursts.

Its innovative hydraulic-free intermediary structure enables up to seven precisely controlled injection events per cycle, with atomization consistency marked by a coefficient of variation (CV) under 0.8. The fully enclosed, zero-return fuel system eliminates high-pressure backflow losses, reducing energy consumption by 35%. Designed for passenger cars, light commercial vehicles, and equipment operating under extreme conditions, the HDU series redefines the boundaries of efficient combustion and ultra-low emissions with its “zero-lag” fuel delivery capability.