EXHAUST GAS HEAT EXCHANGER

Title:

EXHAUST GAS HEAT EXCHANGER

Document Type and Number:

WIPO Patent Application WO/2003/010481

Kind Code:

A1

Abstract:

An exhaust gas heat exchanger, comprising first wings (111c) projected in a first direction orthogonal to the circulating direction of EGR gas and second wings (111c) projected in a direction orthogonal to the circulating direction of the EGR gas and different from the first direction provided on the inside of an inner fin (111), wherein, since the EGR gas flows macroscopically in an exhaust gas passage (110a) while meandering in the direction (D1) orthogonal to the longitudinal direction (D₀) of the exhaust gas passage after colliding with the wings (111c), such an event that the EGR gas circulates only in the portions of the exhaust gas passage where the wings (111c) is not provided and a circulation resistance is small is difficult to occur, whereby, since the EGR gas is allowed to collide generally uniformly with the wings (111c) when the exhaust gas passage (110a) is observed as a whole, the coefficient of heat transfer can be increased and PM can be prevented from being deposited.

Inventors:

HAYASHI TAKAYUKI
SHIBAGAKI KAZUHIRO
HIRAYAMA NAOKI

Application Number:

PCT/JP2002/007566

Publication Date:

February 06, 2003

Filing Date:

July 25, 2002

Export Citation:

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Assignee:

DENSO CORP (JP)

International Classes:

F02M25/07; F28D1/06; F28D7/16; F28F3/02; F28F3/06; F28F3/08; F28F13/12; F28F19/01; (IPC1-7): F28F3/06; F02M25/07

Foreign References:

JP2000097578A	2000-04-04
JPH01151082U	1989-10-18
JPH0249512Y2	1990-12-26
JPS60139182U	1985-09-14
JPS5827337Y2	1983-06-14
JPH11108458A	1999-04-23
JPS6239183U	1987-03-09

Other References: