CN-122014447-A - Dual fuel injection system control

CN122014447ACN 122014447 ACN122014447 ACN 122014447ACN-122014447-A

Abstract

The system for fuel injection includes a main fuel injection system configured to inject fuel into a cylinder of an internal combustion engine using a first injection technique and a supplemental fuel injection system configured to inject fuel into the cylinder according to a second injection technique that is different from the first injection technique. The system also includes a controller configured to monitor a parameter of a fuel pump connected to the main fuel injection system and the supplemental fuel injection system and to control a ratio of a first fuel volume injected by the supplemental fuel injection system to a second fuel volume injected by the main fuel injection system during an engine stroke based on the parameter being greater than or equal to a parameter threshold.

Inventors

J.M. Gwaite
H. D. Varu
C. Avachart
RUFF JOSEPH A.
D. P. Himes

Assignees

通用汽车环球科技运作有限责任公司

Dates

Publication Date: 20260512
Application Date: 20250106
Priority Date: 20241112

Claims (10)

1. A system for fuel injection, comprising: A main fuel injection system configured to inject fuel into a cylinder of an internal combustion engine using a first injection technique; a supplemental fuel injection system configured to inject fuel into the cylinder according to a second injection technique, the second injection technique being different from the first injection technique, and A controller configured to monitor a parameter of a fuel pump connected to the main and supplemental fuel injection systems and to control a ratio of a first fuel volume injected by the supplemental fuel injection system to a second fuel volume injected by the main fuel injection system during an engine stroke based on the parameter being greater than or equal to a parameter threshold.
2. The system of claim 1, wherein the main fuel injection system comprises a direct injector having a first size and the supplemental fuel injection system comprises a direct injector having a second size, the second size being different from the first size.
3. The system of claim 1, wherein the main fuel injection system is a direct injection system and the supplemental fuel injection system is a port fuel injection system.
4. The system of claim 1, wherein the parameter is a fuel intake volume related to an amount of fuel drawn by the fuel pump.
5. The system of claim 1, wherein the parameter is an average fuel intake volume into the fuel pump over a plurality of engine strokes.
6. The system of claim 1, wherein the controller is configured to operate the internal combustion engine according to a normal mode in which fuel injection is performed using a first value of the ratio, and to operate the internal combustion engine according to a supplemental mode in which fuel injection is performed using a second value of the ratio, the second value of the ratio being selected to drop the parameter below the parameter threshold.
7. The system of claim 6, wherein the fuel injection is performed by only the main fuel injection system in the normal mode and the fuel injection is performed by only the supplemental fuel injection system or by a combination of the main and supplemental fuel injection systems in the supplemental mode.
8. The system of claim 6, wherein the controller is configured to determine the parameter during the supplemental mode and compare the determined parameter to the parameter threshold.
9. The system of claim 8, wherein the controller is configured to adjust the air flow to the cylinders during the supplemental mode based on the determined parameter being greater than or equal to the parameter threshold.
10. A method of operating an internal combustion engine, comprising: Providing a fuel-air mixture to the internal combustion engine by injecting fuel into a cylinder of the internal combustion engine, the injection being performed by at least one of a main fuel injection system configured to inject fuel using a first injection technique and a supplemental fuel injection system configured to inject fuel using a second injection technique, the second injection technique being different from the first injection technique; monitoring parameters of fuel pumps connected to the main fuel injection system and the supplemental fuel injection system, and Based on the parameter being greater than or equal to a parameter threshold, a ratio of a first volume of fuel injected by the supplemental fuel injection system to a second volume of fuel injected by the main fuel injection system during an engine stroke is controlled.

Description

Dual fuel injection system control Technical Field The present disclosure relates to the field of engine systems, and more particularly, to fuel injection in an engine system. Background Fuel injection systems use fuel injectors to inject fuel into an engine. Fuel injection is typically controlled by an Engine Control Module (ECM) or other controller. The vehicle may include one or more of various types of fuel injectors, such as port fuel injectors and/or direct fuel injectors. During vehicle operation, it is important to maintain fuel injection parameters such as flow rate and injection volume within the capabilities of the vehicle hardware, including the fuel pump. Disclosure of Invention In one exemplary embodiment, a system for fuel injection includes a main fuel injection system configured to inject fuel into a cylinder of an internal combustion engine using a first injection technique and a supplemental fuel injection system configured to inject fuel into the cylinder according to a second injection technique that is different from the first injection technique. The system also includes a controller configured to monitor a parameter of a fuel pump connected to the main fuel injection system and the supplemental fuel injection system and to control a ratio of a first fuel volume injected by the supplemental fuel injection system to a second fuel volume injected by the main fuel injection system during an engine stroke based on the parameter being greater than or equal to a parameter threshold. In addition to one or more features described herein, the main fuel injection system includes a direct injector having a first size, and the supplemental fuel injection system includes a direct injector having a second size, the second size being different from the first size. In addition to one or more features described herein, the main fuel injection system is a direct injection system and the supplemental fuel injection system is a port fuel injection system. In addition to one or more features described herein, the parameter is a fuel intake volume related to an amount of fuel drawn by the fuel pump. In addition to one or more features described herein, the parameter is an average fuel intake volume of the fuel pump over a plurality of engine strokes. In addition to one or more features described herein, the controller is configured to operate the internal combustion engine according to a normal mode in which fuel injection is performed using a first value of the ratio, and to operate the internal combustion engine according to a supplemental mode in which fuel injection is performed using a second value of the ratio, the second value of the ratio being selected to drop the parameter below the parameter threshold. In addition to one or more features described herein, fuel injection is performed by the main fuel injection system alone in the normal mode and fuel injection is performed by the supplemental fuel injection system alone or by a combination of the main and supplemental fuel injection systems in the supplemental mode. In addition to one or more features described herein, the controller is configured to determine a parameter during the supplemental mode and compare the determined parameter to a parameter threshold. In addition to one or more features described herein, the controller is configured to adjust the air flow to the cylinders during the supplemental mode based on the determined parameter being greater than or equal to the parameter threshold. In another exemplary embodiment, a method of operating an internal combustion engine includes providing a fuel-air mixture to the internal combustion engine by injecting fuel into a cylinder of the internal combustion engine, the injecting performed by at least one of a main fuel injection system configured to inject fuel using a first injection technique and a supplemental fuel injection system configured to inject fuel using a second injection technique, the second injection technique being different from the first injection technique. The method further includes monitoring a parameter of a fuel pump connected to the main fuel injection system and the supplemental fuel injection system, and controlling a ratio of a first volume of fuel injected by the supplemental fuel injection system to a second volume of fuel injected by the main fuel injection system during an engine stroke based on the parameter being greater than or equal to a parameter threshold. In addition to one or more features described herein, the main fuel injection system includes a direct injector having a first size, and the supplemental fuel injection system includes a direct injector having a second size, the second size being different from the first size. In addition to one or more features described herein, the main fuel injection system is a direct injection system and the supplemental fuel injection system is a port fuel injection system. In addition to one or more features d