公开(公告)号：US12235146B2

公开(公告)日：2025-02-25

申请号：US18171420

申请日：2023-02-20

Applicant: Vitesco Technologies GmbH

Inventor： Anselm Wieland

IPC: G01F22/02 ,  F02D41/38 ,  G05B19/416

Abstract: A method and a device for ascertaining a fluid injection quantity of an injection system. The injection system includes a high-pressure pump, a high-pressure region that adjoins the high-pressure pump, a pressure sensor, and an injector that is fed from the high-pressure region. The method includes detecting a measurement signal using the pressure sensor and segmenting a first pressure profile from the measurement signal. The first pressure profile characterizes the pressure profile prior to a fluid injection using the injector. The method also includes segmenting a second pressure profile from the measurement signal. The second pressure profile characterizes the pressure profile after the fluid injection using the injector. The method also includes performing a kernel density estimation using the first pressure profile and the second pressure profile, ascertaining a pressure difference, and ascertaining the fluid injection quantity using the pressure difference.

公开(公告)号：US20230204400A1

公开(公告)日：2023-06-29

申请号：US18171420

申请日：2023-02-20

Applicant: Vitesco Technologies GmbH

Inventor： Anselm Wieland

IPC: G01F22/02 ,  G05B19/416 ,  F02D41/38

CPC classification number: G01F22/02 ,  F02D41/3809 ,  G05B19/416 ,  G05B2219/37371

Abstract: A method and a device for ascertaining a fluid injection quantity of an injection system. The injection system includes a high-pressure pump, a high-pressure region that adjoins the high-pressure pump, a pressure sensor, and an injector that is fed from the high-pressure region. The method includes detecting a measurement signal using the pressure sensor and segmenting a first pressure profile from the measurement signal. The first pressure profile characterizes the pressure profile prior to a fluid injection using the injector. The method also includes segmenting a second pressure profile from the measurement signal. The second pressure profile characterizes the pressure profile after the fluid injection using the injector. The method also includes performing a core density estimation using the first pressure profile and the second pressure profile, ascertaining a pressure difference, and ascertaining the fluid injection quantity using the pressure difference.