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Method and system for improving accuracy of correction of fuel quantity at the time when recirculation valve is opened

A technology of recirculation valve and calibration accuracy, which is applied in the direction of charging system, fuel injection pump, fuel injection device, etc., and can solve problems such as stoppage, time delay, and insufficient actual quantity

Pending Publication Date: 2020-09-01
HYUNDAI MOTOR CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Misfire or engine stop is possible due to insufficient actual amount of fuel and hydrocarbons being burned in the combustion chamber
[0008] In addition, we have further found that there is a sequential time delay between the time point when the operation of the accelerator pedal is interrupted and the time point when the RCV is operated and the time point when the opening degree of the throttle valve is reduced

Method used

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  • Method and system for improving accuracy of correction of fuel quantity at the time when recirculation valve is opened
  • Method and system for improving accuracy of correction of fuel quantity at the time when recirculation valve is opened
  • Method and system for improving accuracy of correction of fuel quantity at the time when recirculation valve is opened

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Embodiment approach

[0045] According to an embodiment of the present invention, for example, when the opening of the accelerator pedal is decreased and the opening of the throttle valve is decreased in a region where the RCV 900 is not operated, it is detected whether or not a surge phenomenon (that is, occurrence of turbocharger chattering) occurs. The phenomenon). Based on the deviation of the signal generated from the sensor attached to the turbocharger, it is detected whether the internal pressure of the turbocharger fluctuates greatly. If the internal pressure of the turbocharger greatly fluctuates beyond a reference value, it is determined that a surge phenomenon occurs.

[0046] Whether to open the RCV 900 when the surge phenomenon occurs is determined by the pre-prepared RCV operation program. The RCV operation program is contained in the control unit 1000 . When the RCV 900 is turned on, the RCV operating program checks whether there is an area where an error occurs in measuring air vo...

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Abstract

The invention relates to a method and system for improving accuracy of correction of fuel quantity at the time when recirculation valve is opened. A method for improving accuracy of correction of fuelquantity at the time when a recirculation valve (RCV) is opened, may include a step of correcting injection amount of fuel based on consideration factors when the RCV is operated to be opened. The consideration factors include property values of a flow path of the RCV, the flow path being mounted to an intake pipe to connect between a front end of a compressor close to the atmosphere and a rear end of the compressor adjacent to combustion chambers, a first calculation value obtained by calculating amount of air to be introduced into the combustion chambers after circulating from the flow pathof the RCV to the intake pipe, and a second calculation value obtained by calculating amount of hydrocarbon to be introduced into the flow path of the RCV by purging evaporative gas.

Description

technical field [0001] The present invention relates to a method and system for improving the accuracy of fuel quantity correction when a recirculation valve (RCV) is open. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and may not constitute prior art. [0003] Turbochargers, which compress intake air and supply it to the combustion chambers, are installed in the intake and exhaust pipes. The turbocharger includes a turbine installed to an exhaust pipe to be rotated by exhaust gas, and a compressor installed to an intake pipe to be rotated according to the rotation of the turbine so as to compress intake air. [0004] However, when the opening degree of the throttle valve is small, all the air compressed by the compressor cannot be injected into the combustion chamber. This can cause a vibration or ringing phenomenon in the turbocharger or compressor. A recirculation valve (RCV) and a f...

Claims

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Application Information

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IPC IPC(8): F02D41/14F02D41/30F02D41/00
CPCF02D41/1473F02D41/1459F02D41/30F02D41/0077F02D41/004F02D2041/1433F02D41/0072F02D41/0045F02M25/0836F02D41/0007F02D41/0042F02D2200/0402F02D41/1441Y02T10/12F02D41/182F02M25/089F02M59/38F02M25/0854
Inventor 安太浩
Owner HYUNDAI MOTOR CO LTD