Title:
EGR COOLER
Document Type and Number:
WIPO Patent Application WO/2006/035986
Kind Code:
A1
Abstract:
An EGR cooler, wherein a bypass duct part is integrally formed in a casing, a thermal deformation produced on a part of the casing in bypassing exhaust gases is reasonably absorbed, an EGR cooler body is fixedly brazed to a valve case, and the valve case is increased in strength. The cooler comprises the bypass circuit part (18) between the inner surface of the casing (9) and a core (8) and a switching means (19) selectively leading the exhaust gases (12) to one side of the core (8) and the bypass duct part (18). A thermal stress absorbing part (32) is formed at the bypass duct part (18) of the casing (9) by arranging a large number of circumferentially formed outer ribs separately from each other and parallel with each other in the longitudinal direction. Then, a thin sheet metal is deep-drawn by a pressing machine to integrally form the tubular valve case (13). A pair of slits (13b) are formed at the rear end of the valve case (13), both edges of a valve inside partition plate (14) are inserted into the slits (13b), and support projected parts (14a) are formed on both edge part surfaces of the valve inside partition plate (14) to support the edges of the slits by the support projected parts (14a). The opening of the valve case (13) is integrally fixedly brazed to the opening of the header part (31b) to the casing (9).
Inventors:
NAKAMURA YOICHI
Application Number:
PCT/JP2005/018258
Publication Date:
April 06, 2006
Filing Date:
September 27, 2005
Export Citation:
Assignee:
T RAD CO LTD (JP)
NAKAMURA YOICHI
NAKAMURA YOICHI
International Classes:
F02M25/07; F28D1/06; F28D9/02; F28F3/08; F28F9/02; F28F9/26
Domestic Patent References:
| WO2004065876A1 | 2004-08-05 | |||
| WO2002010574A1 | 2002-02-07 |
Foreign References:
| EP1164280A2 | 2001-12-19 | |||
| JP2004257366A | 2004-09-16 | |||
| EP0942156A1 | 1999-09-15 | |||
| JPS60150468A | 1985-08-08 |
Other References:
See also references of EP 1801407A4
None
None
Attorney, Agent or Firm:
Kubota, Takubi (Negishi 1-chome Taito-ku, Tokyo, JP)
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