公开(公告)号：US20190360424A1

公开(公告)日：2019-11-28

申请号：US16423428

申请日：2019-05-28

Applicant: MAGNETI MARELLI S.p.A.

Inventor： Marco Parotto ,  Marco Morelli ,  Claudio Guido ,  Domenico Paolino

IPC: F02D41/40

Abstract: Method to determine a closing instant of an electromagnetic fuel injector; in a beginning instant of the injection, a positive voltage is applied to a coil of an electromagnetic actuator so as to cause an electric current to circulate through the coil, said electric current determining the opening of an injection valve; in an end instant of the injection, a negative voltage is applied to the coil of the electromagnetic actuator so as to cancel the electric current circulating through the coil; a first voltage time development is detected at least one end of the coil of the electromagnetic actuator after the cancellation of the electric current circulating through the coil; the voltage actuation time development is compared with a voltage comparison time development; and the closing instant of the electromagnetic injector is determined based on the comparison between the voltage actuation time development and the voltage comparison time development.

公开(公告)号：US20190360423A1

公开(公告)日：2019-11-28

申请号：US16423906

申请日：2019-05-28

Applicant: MAGNETI MARELLI S.p.A.

Inventor： Marco Parotto ,  Marco Morelli ,  Claudio Guido ,  Domenico Paolino

IPC: F02D41/30 ,  F02M51/06

Abstract: Method to determine an opening time of an electromagnetic fuel injector; the electromagnetic fuel injector is controlled using a series of progressively increasing energization times of the electromagnetic actuator; for each control of the electromagnetic injector, the presence or the absence of a closing of the injection valve is detected; the opening time is identified, which is equal to an intermediate value between the last energization time of the electromagnetic actuator for which the absence of a closing of the injection valve was determined and the first energization time of the electromagnetic actuator for which the presence of a closing of the injection valve was determined.