Unlock instant, AI-driven research and patent intelligence for your innovation.

Exhaust-gas recirculation apparatus and exhaust-gas recirculation flow rate estimation method for internal combustion engines

A technology of exhaust gas recirculation and internal combustion engine, which is applied in the direction of exhaust gas recirculation, mechanical equipment, internal combustion piston engine, etc., and can solve the problems that internal combustion engines cannot be applied

Inactive Publication Date: 2010-07-14
TOYOTA JIDOSHA KK
View PDF3 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the method described in JP-A-10-141147 is applicable only to an internal combustion engine having only one EGR passage, and cannot be applied to an internal combustion engine having two or more EGR passages

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Exhaust-gas recirculation apparatus and exhaust-gas recirculation flow rate estimation method for internal combustion engines
  • Exhaust-gas recirculation apparatus and exhaust-gas recirculation flow rate estimation method for internal combustion engines
  • Exhaust-gas recirculation apparatus and exhaust-gas recirculation flow rate estimation method for internal combustion engines

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0012] figure 1 An internal combustion engine including an exhaust gas recirculation device according to an exemplary embodiment of the present invention is shown. figure 1 The internal combustion engine 1 shown in is a diesel engine installed in a vehicle as a driving power source. The internal combustion engine 1 has a plurality of cylinders 2 ( figure 1There are four cylinders 2) and intake passages 3 and exhaust passages 4 connected to the corresponding cylinders 2. In the air intake passage 3, there are: an air filter 5 for filtering the incoming air; an air flow meter 6 ("fresh air amount detection device") that outputs a signal indicating the amount of incoming air; A throttle valve 7 for the air quantity; a compressor 8a of the turbocharger 8; and an intercooler 9 for cooling the incoming air. In addition, in the intake manifold 3a forming a part of the intake passage 3, an oxygen concentration sensor 10 ("oxygen concentration detection means") that outputs a signal...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

An exhaust-gas recirculation apparatus for an internal combustion engine has a high-pressure EGR passage (20), a low-pressure EGR passage (21), a high-pressure EGR valve (22), and a low-pressure EGR valve (24) and performs open-loop control to the low-pressure EGR valve (24). The flow rate (Ghpl) of EGR gas flowing in the high-pressure EGR passage (20) and the flow rate (Glpl) of EGR gas flowing in the low-pressure EGR gas passage (21) are estimated based on the oxygen concentration (O2s) in the gas at the portion of the intake passage (3) downstream of the portion to which exhaust gas is delivered from the high-pressure EGR passage (2), the flow rate (Gdpf) of the gas passing through an exhaust-gas purifying catalyst unit (11) provided in the exhaust passage between the exhaust-gas inlets of the high-pressure EGR passage (20) and the low-pressure EGR passage (21), the flow rate (Gafm) of fresh air, and the fuel amount (Q) supplied to the cylinders (2) of the internal combustion engine per unit time.

Description

technical field [0001] The present invention relates to an exhaust gas recirculation apparatus and an exhaust gas recirculation flow rate estimation method for an internal combustion engine having two or more EGR passages extending between an exhaust passage and an intake passage of the internal combustion engine. Background technique [0002] Japanese Patent Application Publication No. 2005-076456 (JP-A-2005-076456) discloses an internal combustion engine having: a first EGR passage from a catalytic converter in an exhaust pipe combined with a filter carrying an exhaust gas purification catalyst; The part of the exhaust manifold extends to the part of the intake pipe upstream of the compressor of the turbocharger; the second EGR passage extends from the part of the exhaust manifold upstream of the turbine of the turbocharger to the part connected to the intake port of the internal combustion engine a surge tank; a first EGR control valve disposed in the first EGR passage; a...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): F02D41/00F02M25/07F02D41/14
CPCF02D41/0072F02D41/144F02M25/0755Y02T10/47F02M25/0744F02M25/0727F02M25/0718F01N3/0842F02M25/0754F02M25/0709F01N3/0821F01N3/0814F02M25/0713F02D9/04F02M25/0707F02D41/18F02D41/1445F02B29/0406F02M26/46F02M26/05F02M26/06F02M26/10F02M26/15F02M26/23F02M26/38F02M26/47Y02T10/40
Inventor 松永彰生中山茂树大西知美家村晓幸
Owner TOYOTA JIDOSHA KK
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com