US 2014/0372011 A1 · METHOD FOR DIAGNOSING EGR SYSTEM AND METHOD FOR CONTROLLING FUEL INJECTION USING THE SAME

Abstract

A method for diagnosing an EGR system, includes: a first measuring step of measuring a pressure in an intake manifold; a second measuring step of measuring a pressure and a temperature between an EGR cooler and an EGR valve; a determining step of calculating and determining an opening area of the EGR valve for satisfying a target flow of EGR using a function of the target flow of EGR, the pressure in the intake manifold, and the temperature and the pressure between the EGR cooler and the EGR valve; and a diagnosing step of diagnosing whether the EGR cooler is abnormal by comparing the temperature measured between the EGR cooler and the EGR valve and a reference temperature with each other at the time of exhausting EGR gas at the determined opening area of the EGR valve.

Claims12

Dependent claims

A method for diagnosing an exhaust gas recirculation (EGR) system, comprising:

a first measuring step of measuring a pressure in an intake manifold;
a second measuring step of measuring a pressure and a temperature between an EGR cooler and an EGR valve;
a determining step of calculating and determining an opening area of the EGR valve for satisfying a target flow of EGR using a function of the target flow of EGR, the pressure in the intake manifold, and the temperature and the pressure between the EGR cooler and the EGR valve;
and
a diagnosing step of diagnosing whether the EGR cooler is abnormal by comparing the temperature measured between the EGR cooler and the EGR valve and a reference temperature with each other at the time of exhausting EGR gas at the determined opening area of the EGR valve.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application

14/044,536Filed 2 Oct 2013

Priority

KR 10-2013-006896517 Jun 2013

Published

18 Dec 2014

Term ends

Not estimatedThe source records don’t support an estimate.

Classification9 codes

F02D 41/0072
Specific aspects of external EGR control: estimating, calculating or determining the EGR rate, amount or flow
F02D 41/0055
According to engine operating conditions: special engine operating conditions, e.g. for regeneration of exhaust gas treatment apparatus
F02M 26/49
Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR]…
F02D 2200/0402
Engine intake system parameters: the parameter being determined by using a model of the engine intake or its components

Method for diagnosing egr system and method for controlling fuel injection using the same

Life of this patent

Method for diagnosing egr system and method for controlling fuel injection using the same

Life of this patent

Abstract

Claims12