Ultrasonic fuel injector flow rate estimating system for internal combustion engine of motor vehicle, has measuring unit measuring effort of actuator and including piezoelectric cell that generates signal destined to sensor, from effort

摘要

The system has a measuring unit measuring longitudinal effort of a piezoelectric type actuator (1). The measuring unit has a piezoelectric cell (8) generating an electrical signal that is in the form of voltage/current destined to a voltage/current sensor, from the effort of the actuator. A filter is arranged between active piezoelectric cells (2) and an input of the sensor, where the active cell is arranged between electrodes (3, 4). The sensor has a phase comparator that generates a phase signal.