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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
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.
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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.
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公开(公告)号：US20130327297A1
公开(公告)日：2013-12-12
申请号：US13911244
申请日：2013-06-06
Applicant: Magneti Marelli S.p.A.
Inventor： Stefano Sgatti , Marco Parotto , Gabriele Serra , Fabio Sensi
IPC: F02M69/50
CPC classification number: F02M69/50 , F02B2075/1808 , F02D41/2467 , F02D41/247 , F02D41/402 , F02D2200/0602 , F02D2200/0616
Abstract: A method refreshes an injection law of a fuel injector to be tested in an injection system. The method comprises steps of establishing a desired fuel quantity for the fuel injector to be tested, performing at least one first measurement opening of the fuel injector to be tested in a test actuation time, determining a pressure drop in a common rail during the first measurement opening of the fuel injector to be tested, determining a first fuel quantity that is fed during the first measurement opening, calculating a second fuel quantity as a difference between the desired fuel quantity and the first fuel quantity, and performing a second completion opening of the fuel injector to be tested for feeding the second fuel quantity needed to reach the desired fuel quantity.
Abstract translation: 一种方法刷新在喷射系统中待测试的燃料喷射器的喷射定律。 该方法包括以下步骤：为待测试的燃料喷射器建立期望的燃料量，在测试致动时间内执行要测试的燃料喷射器的至少一个第一测量开口，在第一测量期间确定共轨中的压降 打开要测试的燃料喷射器，确定在第一测量开口期间被馈送的第一燃料量，计算第二燃料量作为期望燃料量和第一燃料量之间的差，并执行第二燃料量的第二完成开度 燃料喷射器被测试以供应达到所需燃料量所需的第二燃料量。
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公开(公告)号：US10385814B2
公开(公告)日：2019-08-20
申请号：US13911244
申请日：2013-06-06
Applicant: Magneti Marelli S.p.A.
Inventor： Stefano Sgatti , Marco Parotto , Gabriele Serra , Fabio Sensi
Abstract: A method refreshes an injection law of a fuel injector to be tested in an injection system. The method comprises steps of establishing a desired fuel quantity for the fuel injector to be tested, performing at least one first measurement opening of the fuel injector to be tested in a test actuation time, determining a pressure drop in a common rail during the first measurement opening of the fuel injector to be tested, determining a first fuel quantity that is fed during the first measurement opening, calculating a second fuel quantity as a difference between the desired fuel quantity and the first fuel quantity, and performing a second completion opening of the fuel injector to be tested for feeding the second fuel quantity needed to reach the desired fuel quantity.
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