公开(公告)号：US20240219263A1

公开(公告)日：2024-07-04

申请号：US18563566

申请日：2022-08-26

Applicant: DELPHI TECHNOLOGIES IP LIMITED

Inventor： Baptiste PERROT

IPC: G01M15/09

CPC classification number: G01M15/09

Abstract: A method of determining a hydraulic timing of a fuel injector in an internal combustion engine, wherein the injector is coupled to a fuel rail comprising a pressure sensor. The method comprises:



acquiring fuel pressure data, obtained by the pressure sensor, representing fuel pressure in the fuel rail over an acquisition window comprising an injection event of the injector;
determining a slope parameter corresponding to a pressure drop consequential to the injection event, the slope parameter being read from a slope map;
configuring a pressure drop model based on the slope parameter; and
operating a fitting operation wherein the pressure drop model is fitted to the fuel pressure data, and wherein the hydraulic timing is derived from the pressure drop model.

公开(公告)号：US20240141849A1

公开(公告)日：2024-05-02

申请号：US18277287

申请日：2022-02-11

Applicant: DELPHI TECHNOLOGIES IP LIMITED

Inventor： Baptiste PERROT ,  David GACON

IPC: F02D41/24 ,  F02D41/20

CPC classification number: F02D41/247 ,  F02D41/20 ,  F02D2041/2055

Abstract: A method of controlling the operation of a solenoid activated fuel injector, the fuel injector including an actuator including a solenoid, and being adapted to control a needle valve dependent on an activation pulse sent to the solenoid to control the needle valve to dispense fuel.
The method comprises the steps of:



a) determining the minimum drive pulse (MDP1) required for the needle valve to open;
b) determining the closing response of the injector during MDP conditions;
c) determining the total operational time during MDP conditions of the injector;
d)—determining the difference between the value determined from step c) and a stored value;
e) determining the value of the difference between the opening delay of the injector and a stored the opening delay of the reference injector from step d); and
f) controlling the operation based on the parameter at e).

公开(公告)号：US20240093655A1

公开(公告)日：2024-03-21

申请号：US18277296

申请日：2022-02-11

Applicant: DELPHI TECHNOLOGIES IP LIMITED

Inventor： Baptiste PERROT

IPC: F02D41/20 ,  F02D41/24

CPC classification number: F02D41/20 ,  F02D41/247 ,  F02D2041/2055

Abstract: A method of controlling a solenoid controlled fuel injector including a solenoid controlled actuator adapted to control a needle valve comprises the steps of: a) providing a reference curve/signal;



b) activating the injector by sending an activation pulse to the solenoid, and measuring the voltage signal to provide a solenoid voltage signal, determining a difference signal, Delta_signal; d) differentiating the signal of step c) to provide a first differential signal; e) from step d) providing a signal of values; f) differentiating the plot/single of step d) to provide a second derivative of the Delta_signal; g) multiplying the values of plots/signals from step f), step e) and c) to provide a further plot; h) determining the valve closing time; i) subsequently controlling the fuel injector based on the result of step h).

公开(公告)号：US20250137416A1

公开(公告)日：2025-05-01

申请号：US18690551

申请日：2022-09-08

Applicant: DELPHI TECHNOLOGIES IP LIMITED

Inventor： Baptiste PERROT

IPC: F02D41/38 ,  G01M15/04

Abstract: A method of operating a fuel injection system of an internal combustion engine comprising at least one fuel injector associated with a combustion chamber and coupled to a fuel rail comprising a pressure sensor. The method comprises applying to the injector a drive signal of predetermined length; and a pressure drop analysis, PDA, strategy is operated, by which an injected fuel quantity corresponding to a given injection event is determined from a mapping based on a rail pressure drop corresponding to the given injection event. Rail pressure data are acquired by the pressure sensor during an analysis window encompassing the given injection event. In the method, the rail pressure data are processed in order to cancel predetermined artefacts of known intensity and timing due to the injection system and intervening in the analysis window, whereby corrected pressure data are obtained; and the PDA strategy is operated based on a pressure drop calculated from the corrected rail pressure data.