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    Valve timing detection in fuel system using off cycle sweep
    3.
    发明授权
    Valve timing detection in fuel system using off cycle sweep 有权

    公开(公告)号：US12116941B1

    公开(公告)日：2024-10-15

    申请号：US18228845

    申请日：2023-08-01

    Applicant: Caterpillar Inc.

    Inventor： Mitchell B. Juchems ,  Daniel R. Puckett ,  Andrew O. Marrack ,  Kaushik Krishnamurthy

    IPC: F02D1/18 ,  F02D41/00

    CPC classification number: F02D1/18 ,  F02D41/009

    Abstract: Operating a fuel system for an engine includes moving a plunger during a pumping cycle between an advanced position and a retracted position, and pulsing a solenoid actuator in an electrical circuit during at least one off cycle of the plunger where the plunger is neither advancing nor retracting with a plurality of current pulses of varied duration. An electrical property such as a freewheeling response in the electrical circuit induced by moving a valve in response to each respective current pulse is monitored, and a valve timing of the valve determined based on the monitored electrical property. The fuel system including a fuel injector may be electronically trimmed based on the determined valve timing. Related apparatus and control logic is also disclosed.

    Fuel injector control system and method
    4.
    发明授权
    Fuel injector control system and method 有权

    公开(公告)号：US12110832B2

    公开(公告)日：2024-10-08

    申请号：US17817036

    申请日：2022-08-03

    Applicant: Caterpillar Inc.

    Inventor： Andrew O. Marrack ,  Mitchell B. Juchems

    IPC: F02D41/20 ,  F02D41/40

    CPC classification number: F02D41/20 ,  F02D41/401 ,  F02D2041/2048 ,  F02D2041/2055 ,  F02D2041/2058

    Abstract: A fuel injection installation method includes detecting an actuation timing of a first valve of a fuel injector, detecting an actuation timing of a second valve of the fuel injector, detecting a return timing of the first valve of the fuel injector, and detecting a return timing of the second valve of the fuel injector. The method includes, for one or more fuel injection events, modifying at least one of: a maximum amplitude of solenoid current, an average amplitude of solenoid current, a start time of solenoid current, an end time of solenoid current, or a total time of solenoid current. The modification is based on the actuation timing of the first valve, the actuation timing of the second valve, the return timing of the first valve, and the return timing of the second valve, and may be performed for installation of the fuel injector.

    Fluid conditioning module
    5.
    发明授权
    Fluid conditioning module 有权

    公开(公告)号：US10208727B2

    公开(公告)日：2019-02-19

    申请号：US14980318

    申请日：2015-12-28

    Applicant: Caterpillar Inc.

    Inventor： Andrew O. Marrack ,  Scott F. Shafer ,  Martin A. Lehman ,  Kenneth C. Adams

    IPC: F02M37/00 ,  F02M37/18 ,  F02M63/02 ,  F02M37/22 ,  F04D13/12 ,  F04D13/14 ,  F04D15/00 ,  F04B23/10 ,  F04B23/14 ,  F04C11/00 ,  F04C14/24

    Abstract: A fluid conditioning module having a fluid inlet and a fluid outlet is provided. The fluid conditioning module includes a first pump element, a second pump element, a pressure regulator, a controller, and a prime mover to impart rotational motion in the first and second pump elements. A first pump inlet is in fluid communication with the fluid inlet. A filter inlet is in fluid communication with a first pump outlet and a second pump outlet, and a filter outlet is in fluid communication with the fluid outlet. A pressure regulator inlet and a pressure regulator outlet are in fluid communication with the filter outlet and a recirculation conduit, respectively. The control valve has a first position and a second position, which allows fluid flow through the recirculation conduit. The controller adjusts operation of one or more of the prime mover and the control valve based upon a predetermined parameter.

    Engine parasitic loading strategy using fuel pressurization
    6.
    发明授权
    Engine parasitic loading strategy using fuel pressurization 有权

    公开(公告)号：US12253041B1

    公开(公告)日：2025-03-18

    申请号：US18535083

    申请日：2023-12-11

    Applicant: Caterpillar Inc.

    Inventor： Andrew O. Marrack ,  Lifeng Wang ,  Satya Naga Deepak Pillarisetti

    IPC: F02D41/30

    Abstract: Operating an engine system includes cold starting an engine, closing spill valves to pressurize fuel in a plurality of plunger cavities, opening injection valves in some of a plurality of fuel injectors to inject fuel into firing cylinders in an engine cycle, and opening spill valves in some of the plurality of fuel injectors while injection valves therein remain closed to bleed fuel to a lower pressure space in the engine cycle. The pressurization of fuel in the fuel injectors remaining closed parasitically loads the engine to increase a fuel burned amount hastening warm up and limiting misfire. Related apparatus and control logic is also disclosed.

    VALVE ARRIVAL TIME DETECTION IN FUEL SYSTEM HAVING DUAL SOLENOID OPERATED VALVES
    9.
    发明申请
    VALVE ARRIVAL TIME DETECTION IN FUEL SYSTEM HAVING DUAL SOLENOID OPERATED VALVES 有权

    公开(公告)号：US20250020095A1

    公开(公告)日：2025-01-16

    申请号：US18352563

    申请日：2023-07-14

    Applicant: Caterpillar Inc.

    Inventor： Mitchell B. Juchems ,  Daniel R. Puckett ,  Andrew O. Marrack

    IPC: F02M51/06 ,  F02D41/40 ,  F02M65/00

    Abstract: Operating a fuel injector in a fuel system for an engine includes energizing a first solenoid actuator to move a spill valve from a first position to a second, closed position, and energizing a second solenoid actuator to move a fuel injection valve in the fuel injector from a closed position to an open position. A pull-in tier of a waveform energizing the second solenoid actuator is generated via a first current produced by a boosted voltage power supply and a second current produced by a lower voltage power supply. Arrival timing of the valve at the open position is detected based on a property of the second current, such that a valve arrival timing error may be used to trim the fuel injector. Related methodology and control logic is also disclosed.

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