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EP1186767A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Exhaust gas recirculation system for internal combustion engine

Assignee: Toyota Motor Corp
•
Filing: 2001-09-10
•
Granted: —
•
Expires: 2021-09-10
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Abstract

Abstract An EGR system for an internal combustion engine includes a cooling means (44) disposed in an EGR passage (40) for cooling an EGR gas, an EGR-gas compressor (46) disposed in the EGR passage (40) upstream of the cooling means (44) for compressing the EGR gas, an EGR-gas turbine (48) disposed in the EGR passage (40) downstream of the cooling means (44) for expanding the EGR gas, and driving means (50) for driving the EGR-gas compressor and turbine (46),(48). The EGR passage (40) extends in communication between the exhaust passage (30) downstream of a turbine (34) of a supercharger for the engine and the intake air passage (20) upstream of a compressor (24) of the supercharger. When the EGR system is equipped with a diesel particulate filter (36), the EGR passage (40) is connected to a portion of the exhaust passage (30) downstream of the particulate filter (36).

Inventors

  • 👤 Masahito Toyota Jidosha Kabushiki Kaisha Shibata
  • 👤 Yasuhiko Toyota Jidosha Kabushiki Kaisha Otsubo
  • 👤 Sadanobu Toyota Industries Corporation Shimizu

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-30 06:31
CPC Classifications
F; F02; F02M; F02M26/00; F02M26/13; F02M26/34; F02M26/02; F02M26/04; F02M26/06; F02M26/22; F02M26/23; F02M26/28; F02M26/29; F02M26/30; F02M26/14; F02M26/15; F02M26/50

Claims Analysis

Total Claims: 7
Claim 1
Independent Claim 90 words
An EGR system for an internal combustion engine, comprising: cooling means (44), disposed in an EGR passage (40), for cooling an EGR gas; an EGR-gas compressor (46) which is disposed in the EGR passage (40) upstream of the cooling means (44) and is operable to compress the EGR gas; an EGR-gas turbine (48) which is disposed in the EGR passage (40) downstream of the cooling means (44) and is operable to expand the EGR gas; and driving means (50) for driving the EGR-gas compressor (46) and the EGR-gas turbine (48).
Claim 2
Dependent Claim 43 words
An EGR system according to claim 1, wherein the EGR passage (40) communicates an exhaust passage (30) downstream of a turbine (34) of a supercharger for the internal combustion engine with an intake passage (20) upstream of a compressor (24) of the supercharger.
Claim 3
Dependent Claim 43 words
An EGR system according to claim 1 or 2, wherein the EGR passage (40) communicates an exhaust passage (30) downstream of a particulate filter (36) with an intake passage (20) upstream of a compressor (24) of a supercharger for the internal combustion engine.
Claim 4
Dependent Claim 29 words
An EGR system according to any one of claims 1 to 3, wherein the driving means (50) is operatively connected to a rotating member of the internal combustion engine.
Claim 5
Dependent Claim 28 words
An EGR system according to any one of claims 1 to 3, wherein the driving means (50) is operatively connected to a supercharger for the internal combustion engine.
Claim 6
Dependent Claim 29 words
An EGR system according to any one of claims 1 to 3, wherein the driving means (50) comprises a motor that is provided independently of the internal combustion engine.
Claim 7
Dependent Claim 26 words
An EGR system according to any one of claims 1 to 3, wherein the driving means (50) utilizes a lubrication system of the internal combustion engine.

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