KR-102962365-B1 - Fuel injection control system

KR102962365B1KR 102962365 B1KR102962365 B1KR 102962365B1KR-102962365-B1

Abstract

The present invention relates to a method for controlling fuel injection of an injector and a system for the same, comprising the steps of: receiving a load applied to an engine detected by a sensor and a pressure change inside an intake manifold formed with a mixer connected so that the fuel injected from the injector can be mixed with outside air, and calculating a fuel injection time and a fuel amount to be injected for each injector; calculating a fuel injection time according to the fuel injection time and a fuel amount to be injected for each injector; assigning a cylinder to which fuel is supplied during fuel injection based on the fuel injection time according to the fuel injection time; assigning an injector that injects fuel to the assigned cylinder according to an injector assignment algorithm; and sequentially opening an intake valve provided in the cylinder and injecting the fuel assigned to each injector.

Inventors

이승욱

Assignees

(주)테너지

Dates

Publication Date: 20260511
Application Date: 20241023

Claims (5)

A fuel injection control method for supplying fuel injected from N (N is a natural number greater than or equal to 2) injectors to M (M is a natural number greater than or equal to 2) cylinders, wherein A step of receiving a load applied to the engine detected by a sensor and a pressure change inside an intake manifold formed with a mixer connected so that the fuel injected from the injector can mix with the outside air, and calculating the fuel injection timing and the amount of fuel to be injected for each injector; A step of calculating the fuel injection time according to the fuel injection timing and the amount of fuel to be injected for each injector; A step of allocating a cylinder to which fuel is supplied at the time of fuel injection based on the fuel injection timing for the above fuel injection time; A step of assigning an injector that injects fuel into the assigned cylinder according to an injector assignment algorithm; and A fuel injection control method comprising the step of sequentially opening intake valves provided in the cylinders and injecting fuel allocated to each injector.
In paragraph 1, The above injector allocation algorithm is, A first loop that sequentially declares a first index from 1 to N indicating the driving order of the injector and inputs the fuel injection time in the order of the first index; and A fuel injection control method comprising: declaring a second index from 1 to M indicating a designated order of each cylinder, and a second loop that repeats the first loop in the order of the second index of the cylinders.
In paragraph 2, The above injector allocation algorithm is, A fuel injection control method characterized by the first loop and the second loop repeating when the second loop is terminated.
In paragraph 1, A fuel injection control method characterized in that the number of cylinders M is greater than the number of injectors N.
As a fuel injection control system for an engine that supplies fuel injected from N (N is a natural number greater than or equal to 2) injectors to M (M is a natural number greater than or equal to 2) cylinders, A first calculation unit that receives a load applied to the engine detected by a sensor and a pressure change inside an intake manifold formed with a mixer connected so that the fuel injected from the injector can mix with the outside air, and calculates the fuel injection timing and the amount of fuel to be injected for each injector; A second calculation unit that calculates the fuel injection time according to the fuel injection timing and the amount of fuel to be injected for each injector; An allocation unit that allocates a cylinder to which fuel is supplied during fuel injection based on the fuel injection timing for the above fuel injection time, and allocates an injector that injects fuel to the allocated cylinder according to an injector allocation algorithm; An injection unit that injects fuel allocated to each of the above-mentioned injectors; and A fuel injection control system comprising an opening/closing unit that sequentially opens intake valves provided in the cylinders.

Description

Fuel injection control system The present invention relates to a method for controlling fuel injection of an injector and a system for the same, and more specifically, to a method for controlling fuel injection of an injector by allocating a fuel injection cylinder based on a predicted fuel injection timing and allocating a fuel injection injector according to a predetermined algorithm, and a system for the same. Generally, a fuel injection system is configured to directly inject a portion of the fuel flowing from the fuel tank into the intake manifold through a supply line into the intake valve of the cylinder via an injector, and to return the remaining uninjected fuel to the fuel tank via a pressure regulator. In particular, in the case where an injector is connected to an intake port distributed from the intake manifold to each cylinder to inject a set amount of fuel, the amount of fuel supplied to the injector must be equal to the amount of fuel required for effective combustion in the cylinder. Furthermore, if injectors and cylinders are configured to correspond to each other, the number of injectors increases as the number of engine cylinders increases, leading to a problem where the specifications of the injectors must be set differently depending on the engine displacement and the cylinder volume. The aforementioned background technology is technical information that the inventor possessed or acquired during the process of deriving the embodiments of the present invention, and it cannot be considered as prior art disclosed to the general public prior to the filing of the embodiments of the present invention. FIG. 1 illustrates a fuel quantity controller in a fuel injection control method of an injector according to one embodiment of the present invention. FIG. 2 illustrates a schematic diagram of a device constituting a fuel injection control method of an injector according to one embodiment of the present invention. FIG. 3 illustrates a flowchart of a fuel injection control method for an injector according to one embodiment of the present invention. FIG. 4 illustrates a block diagram of a fuel injection control method for an injector according to one embodiment of the present invention. FIG. 5 illustrates an injector allocation algorithm in a fuel injection control method of an injector according to an embodiment of the present invention. FIG. 6 illustrates a block diagram of a fuel injection control system of an injector according to one embodiment of the present invention. The present invention will become clear from the embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below but may be implemented in various different forms. These embodiments are provided merely to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the invention, and the present invention is defined only by the scope of the claims. Meanwhile, the terms used in this specification are for describing the embodiments and are not intended to limit the present invention. Throughout this specification, the singular form includes the plural form unless specifically stated otherwise in the text. Throughout this specification, the terms “comprises” and/or “comprising” as used mean that the mentioned components, steps, actions and/or elements do not exclude the presence or addition of one or more other components, steps, actions and/or elements, and that, unless specifically stated otherwise, they do not exclude other components but may include additional components. Additionally, terms such as “?? unit” described throughout this specification refer to a unit that processes at least one function or operation, and this may be implemented in hardware or software, or a combination of hardware and software. Furthermore, throughout this specification, when a part is described as being "connected" to another part, this includes not only cases where they are "directly connected," but also cases where they are connected "with other components in between." The present invention will be described in more detail below. A fuel injection control method (S1) according to one embodiment of the present invention is characterized by the technical feature that it can effectively inject fuel into each cylinder (300) even if the number of injectors (110) and the number of cylinders (300) are not the same. FIG. 1 illustrates a fuel quantity controller (100) in a fuel injection control method (S1) of an injector (110) according to one embodiment of the present invention, and FIG. 2 illustrates a schematic diagram of a device constituting a fuel injection control method (S1) of an injector (110) according to one embodiment of the present invention. Referring to FIG. 1, in the present invention, at least two injectors (110) are formed, and each injector (110) can inject a set amount of f