公开(公告)号：US11946430B2

公开(公告)日：2024-04-02

申请号：US17560055

申请日：2021-12-22

Applicant: Caterpillar Inc.

Inventor： Mitchell B Juchems ,  Daniel Reese Puckett

IPC: F02D41/20 ,  F02D41/40

CPC classification number: F02D41/20 ,  F02D41/401 ,  F02D2041/2013 ,  F02D2041/2051 ,  F02D2041/2055 ,  F02D2041/2058

Abstract: Controlling a fuel injector in a fuel system for an engine includes switching between a boosted voltage power supply and a lower voltage power supply during energizing a solenoid actuator in a fuel injector, and generating a solenoid energizing waveform including a pull-in tier produced by a boosted voltage incipient current, a boosted voltage second current, and a lower voltage later current, based on the switching between a boosted voltage power supply and a lower voltage power supply. Controlling a fuel injector further includes detecting an arrival timing of the valve based on a property of the lower voltage later current, and electronically trimming the fuel injector based on the detecting an arrival timing. Related control system logic is also disclosed.

公开(公告)号：US20230193844A1

公开(公告)日：2023-06-22

申请号：US17560055

申请日：2021-12-22

Applicant: Caterpillar Inc.

Inventor： Mitchell B Juchems ,  Daniel Reese Puckett

IPC: F02D41/20 ,  F02D41/40

CPC classification number: F02D41/20 ,  F02D41/401 ,  F02D2041/2013 ,  F02D2041/2051 ,  F02D2041/2055 ,  F02D2041/2058

Abstract: Controlling a fuel injector in a fuel system for an engine includes switching between a boosted voltage power supply and a lower voltage power supply during energizing a solenoid actuator in a fuel injector, and generating a solenoid energizing waveform including a pull-in tier produced by a boosted voltage incipient current, a boosted voltage second current, and a lower voltage later current, based on the switching between a boosted voltage power supply and a lower voltage power supply. Controlling a fuel injector further includes detecting an arrival timing of the valve based on a property of the lower voltage later current, and electronically trimming the fuel injector based on the detecting an arrival timing. Related control system logic is also disclosed.