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    Systems and methods for reducing rail pressure in a common rail fuel system
    1.
    发明授权
    Systems and methods for reducing rail pressure in a common rail fuel system 有权

    公开(公告)号：US11015548B2

    公开(公告)日：2021-05-25

    申请号：US16772096

    申请日：2017-12-14

    Applicant: Cummins Inc.

    Inventor： David M. Carey ,  Syed Shah Jalal ,  Richard J. Dudek ,  Ulf Carlsson ,  Paul Peavler

    IPC: F02D41/38 ,  F02D41/20 ,  F02D41/00

    Abstract: Methods and systems, using a controller (20), for performing fuel pressure control operation of an engine (12) having at least one cylinder (16) is disclosed. The controller (20) includes a fuel system control unit (42) configured to control a fuel pressure applied to at least one injector (18) of the engine (12) during a motoring condition period (412) based on a commanded pulse train duration (410). During the motoring condition period (412), no combustion occurs in the at least one cylinder (16) of the engine (12). The commanded pulse train duration is a time period during which the at least one injector (18) of the engine (12) is activated for a drain operation. The fuel system control unit (42) is configured to command the at least one injector (18), for the commanded pulse train duration during the motoring condition period (412), to release fuel from the at least one injector (18) without injecting the fuel into the at least one cylinder (16) of the engine (12).

    SYSTEM AND METHOD OF INJECTOR CONTROL FOR MULTIPULSE FUEL INJECTION
    3.
    发明申请
    SYSTEM AND METHOD OF INJECTOR CONTROL FOR MULTIPULSE FUEL INJECTION 有权
    多燃料喷射喷射器控制系统与方法

    公开(公告)号：US20160017837A1

    公开(公告)日：2016-01-21

    申请号：US14332439

    申请日：2014-07-16

    Applicant: Cummins Inc.

    Inventor： David M. Carey ,  Eric A. Benham

    IPC: F02D41/40

    CPC classification number: F02D41/402 ,  F02D2041/1433 ,  F02D2200/0602 ,  F02D2200/0606 ,  F02D2200/0616 ,  Y02T10/44

    Abstract: A system, apparatus, and method are disclosed for controlling a fuel injector using multipulse fuel injection. According to at least one aspect of the present disclosure, the system includes a fuel sequence controller configured for use with a fuel injector having an injector configuration modeled by a body pressure characteristic that includes a rail pressure and an injection rate shape, where the fuel sequence controller is structured to determine an estimate of the injected fuel quantity delivered from the fuel injector at the determined body pressure characteristic.

    Abstract translation: 公开了一种用于使用多脉冲燃料喷射来控制燃料喷射器的系统，装置和方法。 根据本公开的至少一个方面，该系统包括燃料序列控制器，其构造成与燃料喷射器一起使用，该燃料喷射器具有由包括轨道压力和喷射速率形状的体压特性模拟的喷射器构型，其中燃料序列 控制器构造成确定在所确定的体压特性下从燃料喷射器输送的喷射燃料量的估计。

    SYSTEMS AND METHODS FOR REDUCING RAIL PRESSURE IN A COMMON RAIL FUEL SYSTEM
    10.
    发明申请
    SYSTEMS AND METHODS FOR REDUCING RAIL PRESSURE IN A COMMON RAIL FUEL SYSTEM 有权

    公开(公告)号：US20210340931A1

    公开(公告)日：2021-11-04

    申请号：US17328790

    申请日：2021-05-24

    Applicant: Cummins Inc.

    Inventor： David M. Carey ,  Syed Shah Jalal ,  Richard J. Dudek ,  Ulf Carlsson ,  Paul Peavler

    IPC: F02D41/38 ,  F02D41/00 ,  F02D41/20

    Abstract: Methods and systems, using a controller (20), for performing fuel pressure control operation of an engine (12) having at least one cylinder (16) is disclosed. The controller (20) includes a fuel system control unit (42) configured to control a fuel pressure applied to at least one injector (18) of the engine (12) during a motoring condition period (412) based on a commanded pulse train duration (410). During the motoring condition period (412), no combustion occurs in the at least one cylinder (16) of the engine (12). The commanded pulse train duration is a time period during which the at least one injector (18) of the engine (12) is activated for a drain operation. The fuel system control unit (42) is configured to command the at least one injector (18), for the commanded pulse train duration during the motoring condition period (412), to release fuel from the at least one injector (18) without injecting the fuel into the at least one cylinder (16) of the engine (12).

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