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Method and system for compensating fuel injection amount

一种燃油喷射、燃油量的技术，应用在燃料喷射装置、燃料喷射控制、装料系统等方向，能够解决劣化、催化剂温度控制不精确、偏差等问题

Pending Publication Date: 2020-12-18
HYUNDAI MOTOR CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, due to various reasons including the difference in injector quality, there is a problem of deviation between the actual fuel quantity injected via the injector and the target fuel quantity, which leads to the problem of inaccurate temperature control of the catalyst and EM deterioration

Method used

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  • Method and system for compensating fuel injection amount
  • Method and system for compensating fuel injection amount
  • Method and system for compensating fuel injection amount

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Embodiment approach

[0025]A detailed reference will now be given to various embodiments of the present invention, and examples of various embodiments of the present invention are shown in the drawings and described below. Although the present invention will be described in conjunction with exemplary embodiments of the present invention, it should be understood that the description is not intended to limit the present invention to those exemplary embodiments. On the other hand, the present invention is intended to cover not only the exemplary embodiments of the present invention, but also various alternatives, modifications, equivalents, and other embodiments, which may be included in the spirit and scope of the present invention as determined by the appended claims. within.

[0026]Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0027]figure 1 Is a diagram showing the configuration of a system for correcting a fuel injecti...

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Abstract

A method and system for correcting a fuel injection amount that injects fuel may include applying a current value for injecting a target fuel amount and injecting fuel under a driving condition in which fuel injection is blocked; determining a frequency analysis value for a pressure signal of the fuel pressure rail when the fuel is injected; determining a fuel amount difference corresponding to adifference value between the frequency analysis value and a reference frequency analysis value stored in a data storage in advance; and correcting a current value of the injector which is applied to inject the target fuel amount to remove the fuel amount difference.

Description

Technical field[0001]The present invention relates to a method and system for correcting a fuel injection amount. The method and system use the characteristics of a pressure signal detected from a fuel pressure rail to correct the difference in the amount of fuel injected via a fuel injector.Background technique[0002]The fuel supply system that sends fuel from the fuel tank to the engine includes: a fuel pump module, which sends the fuel in the fuel tank to the front end of the high-pressure pump of the engine, the high-pressure pump that increases the fuel pressure to high pressure, and the fuel pressure rail. An injector that keeps the fuel at a high pressure before it is injected into the cylinder, and finally injects the fuel.[0003]At the same time, in the electronically controlled fuel injection system, the electronic control unit (ECU) determines the optimal fuel injection amount suitable for the running state of the engine and the driving state of the vehicle, and determines ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D41/30F02D41/04
CPCF02D41/30F02D41/3005F02D41/04F02D2250/31F02D2200/0602F02D41/3845F02D2041/288F02D41/20F02D41/2467F02M63/0225F02M65/001F02M65/003
Inventor 吴顶上
Owner HYUNDAI MOTOR CO LTD
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