System and method for controlling fuel injection in flex-fuel vehicle

A technology of mixing fuel and fuel injection, applied in the direction of fuel injection control, electrical control, engine control, etc., can solve the problems of reducing combustion stability, easy to weaken the nozzle aging of the sensor, difficult content learning and so on

Pending Publication Date: 2019-07-05
HYUNDAI KEFICO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are the following problems: it takes a long time to learn the ethanol content (about 300 to 800 seconds), the nozzle of the sensor is easy to weaken and age, the oxygen sensor is not activated at the beginning of the startup, and there is a large learning error. Difficult to carry out content learning in high engine load area
Due to such a difference in timing, unexpected errors are induced during predictive control, and there is a problem that combustion stability is reduced.

Method used

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  • System and method for controlling fuel injection in flex-fuel vehicle
  • System and method for controlling fuel injection in flex-fuel vehicle
  • System and method for controlling fuel injection in flex-fuel vehicle

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Embodiment Construction

[0057] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0058] In describing the present invention, the terms used in the following description are used to describe specific embodiments only, and are not intended to limit the present invention. Where the context does not clearly indicate a different meaning, a singular expression includes plural cases.

[0059] Moreover, in this specification, terms such as "comprising" or "having" are used to designate the existence of features, numbers, steps, actions, constituent elements, components or combinations thereof described in the specification, and should be understood as not excluding the existence or addition of one or Possibility of more than one other feature, number, step, action, constituent element, part or combination thereof.

[0060] Also, terms such as first and second may be used to describe various constituent elements, but the abo...

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Abstract

The present invention discloses a method and system for controlling fuel injection in flex-fuel vehicle. The system comprises: an ethanol content change detection unit configured to detect a change inthe content of ethanol; a flow rate calculation unit configured to calculate a volumetric flow rate of blending fuel and to integrate the calculated value; a condition determination unit configured to determine whether the change in the content of ethanol satisfies a condition for applying a fuel injection correction value; a control execution determination unit configured to determine whether toapply the fuel injection correction value by comparing the volumetric flow rate integration value with a preset second reference value; and a controller configured to determine a fuel injection correction value corresponding to the change of the content of ethanol to reflect the determined fuel injection correction value to regulate the fuel injection amount.

Description

technical field [0001] The present invention relates to a fuel injection control system and method, and in particular, to a hybrid fuel vehicle that uses a fuel mixture containing a predetermined amount of ethanol as fuel and is provided with an ethanol sensor for detecting changes in the ethanol content contained in the fuel (FFV, Flex Fuel Vehicle) fuel injection control system and method. Background technique [0002] Recently, due to the acceleration of environmental pollution, environmental regulations are being strengthened in various countries, and the development of eco-friendly vehicles and the spread of alternative fuels are increasing. In particular, in Brazil and North America, policies to popularize bioethanol as an alternative fuel have been implemented for the purpose of reducing oil consumption and agricultural development. As a result, hybrid fuel vehicles (FFVs) that use mixed fuel (gasoline + bioethanol) , Flex Fuel vehicle) surged in interest. [0003] ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D19/08F02D41/00
CPCF02D19/084F02D19/085F02D19/087F02D41/0025F02D19/061F02D41/1441F02D2200/0611Y02T10/30F02D19/0607F02D19/0623F02D19/0634F02D19/0655F02D19/0686F02D41/3005
Inventor 金荣珍金东昰
Owner HYUNDAI KEFICO CORP
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