Device And Method For Controlling A Fuel Injection Valve

    公开(公告)号:US20170089288A1

    公开(公告)日:2017-03-30

    申请号:US15312222

    申请日:2015-03-31

    IPC分类号: F02D41/24 F02D41/20

    摘要: The present disclosure generally relates to internal combustion engines. The teachings thereof may be embodied in methods for the measuring of a feedback signal generated by the movement dynamics of a fuel injector in operation. A method may include: (a) generating an electrical test pulse; (b) feeding the test pulse into an actuation line connecting the output stage to the injector to an electric drive of the injector; (c) measuring an electrical response pulse generated by the actuation line in response to the test pulse; (d) identifying a characteristic feature of the measured response pulse; (e) transferring the feature to a control and evaluation unit; (f) evaluating the feature; and (g) acquiring the characteristic information item about the measuring channel based on the evaluation of the transferred characteristic feature.

    Fuel injector with a solenoid drive

    公开(公告)号:US11203996B2

    公开(公告)日:2021-12-21

    申请号:US16078776

    申请日:2017-02-07

    IPC分类号: F02D41/20

    摘要: In some embodiments, a method includes: setting an actuation time based on a predefined injection quantity; detecting a duration of a resulting closing process; calculating an injection quantity based on the time and the duration; determining the difference of the injection quantity and the predefined quantity; and determining a corrected value of the actuation time based on the difference; and using the corrected value to control further actuation of the fuel injector. The injection quantities and the actuation time are on a characteristic diagram of the relationship between the actuation time, the duration of the closing process, and the injection quantity.

    Pressure determination in a fuel injection valve

    公开(公告)号:US10746119B2

    公开(公告)日:2020-08-18

    申请号:US15572116

    申请日:2016-04-14

    IPC分类号: F02D41/20

    摘要: The invention provides a device and a method for determining a pressure of a fuel (19) which is to be injected into a combustion chamber (23) via a controllable closure element (11) of a solenoid valve (1), wherein the method comprises: generating a current flow (i) through a coil (3) of the solenoid valve (1) in order to generate a magnetic field, in order to generate a magnetic force acting on an armature (9), which magnetic force shifts the armature (9) in the direction of the opening of the closure element (11), determining a magnitude of a magnetic flux (Ψ) of the magnetic field before or when a first state (I) at which the armature starts to shift the closure element is reached, and determining a magnitude of the pressure on the basis of the determined magnitude of the magnetic flux.

    Controlling a fuel injection solenoid valve

    公开(公告)号:US10533511B2

    公开(公告)日:2020-01-14

    申请号:US15782516

    申请日:2017-10-12

    摘要: A device and a method are provided for controlling a magnetic valve which has a coil and an armature which is displaceable by magnetic force, by means of which armature a closure element is displaceable for the purposes of injecting fuel into a combustion chamber, the method includes the steps of: energizing the coil with a voltage in accordance with a first voltage profile in order to generate a first electrical current through the coil; determining a first profile as a function of a first magnetic flux and the first current; identifying, in the first profile, a first characteristic of at least one first start of displacement at which the armature begins to displace the closure element, generating a second voltage profile and energizing the coil in accordance with the second voltage profile, such that, in a second profile, as a function of a second magnetic flux and a second current, a second characteristic of a second start of displacement is more similar to a reference characteristic than the first characteristic.

    PRESSURE DETERMINATION IN A FUEL INJECTION VALVE

    公开(公告)号:US20180163657A1

    公开(公告)日:2018-06-14

    申请号:US15572116

    申请日:2016-04-14

    IPC分类号: F02D41/20

    摘要: The invention provides a device and a method for determining a pressure of a fuel (19) which is to be injected into a combustion chamber (23) via a controllable closure element (11) of a solenoid valve (1), wherein the method comprises: generating a current flow (i) through a coil (3) of the solenoid valve (1) in order to generate a magnetic field, in order to generate a magnetic force acting on an armature (9), which magnetic force shifts the armature (9) in the direction of the opening of the closure element (11), determining a magnitude of a magnetic flux (Ψ) of the magnetic field before or when a first state (I) at which the armature starts to shift the closure element is reached, and determining a magnitude of the pressure on the basis of the determined magnitude of the magnetic flux.

    Determining a lift of a solenoid valve

    公开(公告)号:US10563633B2

    公开(公告)日:2020-02-18

    申请号:US15783308

    申请日:2017-10-13

    摘要: A device and a method are provided for determining a stroke of an armature of a magnetic valve which has a coil and the armature is displaceable by magnetic force, including: providing at least one reference data set which includes a magnitude of a current through the coil and a magnitude of the magnetic flux in the case of a known magnitude of the stroke; generating a current flow through the coil of the magnetic valve in order to generate a magnetic field for generating a magnetic force on the armature, which magnetic force displaces the armature in the direction for the opening of a closure element coupled to the armature; determining a magnitude of the magnetic flux when the armature abuts against a driver of the closure element; and determining the magnitude of the stroke based upon the determined magnitude of the magnetic flux and the reference data set.