Claims
- 1. Heat exchanger for cooling exhaust gas of a motor vehicle engine with a closed flow guiding system for the exhaust gas, comprising at least one heat exchange element arranged between a feeding device and a removing device for the exhaust gas and around which a cooling medium flows, the at least one heat exchange element defining a plurality of separate fluid passages in the flow direction, and a single row of V-shaped pairs of projections being disposed at at least one wall of each said fluid passage.
- 2. Heat exchanger for cooling exhaust gas of a vehicle internal-combustion engine (gas), comprising at least one heat exchange element extending in a flow direction from an exhaust gas inlet to an exhaust gas outlet to form a flow duct for the exhaust gas, and means for providing a cooling medium flow outside and around the flow duct, wherein the at least one heat exchange element defines a plurality of separate fluid passages in the flow direction, and a single row of V-shaped pairs of projections is disposed at at least one wall of each said fluid passage.
- 3. Heat exchanger according to claim 2, wherein the projections of each said pair extend in opposite directions diagonally with respect to the flow direction.
- 4. Heat exchanger according to claim 3, wherein the projections of each said pair diverge in the flow direction.
- 5. Heat exchanger according to claim 2, wherein the projections are aligned at angles of between 15.degree. and 40.degree. diagonally with respect to the flow direction.
- 6. Heat exchanger according to claim 2, wherein a turbulence insert is arranged in the flow duct and comprises a metal sheet bent transversely to the flow direction in a meandering shape and divides the flow duct into a plurality of channels extending in the flow direction.
- 7. Heat exchanger according to claim 6, wherein the projections each project upwards from a surface resting against one of the metal sheets of the heat exchange element.
- 8. Heat exchanger according to claim 2, wherein the at least one heat exchange element is a plurality of heat exchange elements provided with one of corrugated ribs and solid ribs arranged between adjacent ones of the heat exchange elements.
- 9. Heat exchanger according to claim 2, wherein the at least one heat exchange element has two parallel metal sheets with edges spaced by shoulders and configured to receive therebetween a turbulence insert.
- 10. Heat exchanger according to claim 9, wherein the at least one heat exchange element is a plurality of heat exchange elements having one plate arranged between adjacent ones of the heat exchange elements, which plate is provided with strip-shaped recesses which extend essentially parallel to one another and which form, together with the metal sheets of the heat exchange elements, the means for providing the cooling medium flow.
- 11. Heat exchanger according to claim 2, wherein adjacent rows of said pairs of the projections are arranged on opposite walls of the flow duct.
- 12. Heat exchanger for cooling exhaust gas of a motor vehicle engine with a closed flow guiding system for the exhaust gas comprising at least one heat exchange element arranged between a feeding device and a removing device for the exhaust gas and around which a cooling medium flows, the at least one heat exchange element having a flow duct for the exhaust gas in which at least one turbulence insert is operatively arranged with projections from a surface which extend diagonally with respect to a flow direction, wherein areas of the turbulence insert are provided with a series of alternating projections and recesses.
- 13. Heat exchanger according to claim 12, wherein adjacent pairs of the projections are arranged on opposite walls of the flow duct.
- 14. A heat exchange method for cooling exhaust gas of a motor vehicle, comprising the steps of
- (a) arranging at least one heat exchange element between a feeding device and a removing device of a closed flow guiding system around which a cooling medium flows such that the heat exchange element has a flow duct with at least one turbulence insert operatively arranged and defined by projections from a surface of the heat exchange element, which projections extend diagonally with respect to a flow direction of the exhaust gas from an engine of the motor vehicle;
- (b) providing recesses in areas of the at least one heating element, which recesses are offset with respect to the projections in the flow direction; and
- (c) flowing the exhaust gas from the engine through the heat exchange element such that boundary layers of the exhaust gas are constantly broken up and the exhaust gas is constantly mixed and cooled while passing through the heat exchange element.
- 15. Heat exchanger for cooling exhaust gas of a vehicle internal-combustion engine, comprising at least one heat exchange element extending in a flow direction from an exhaust gas inlet to an exhaust gas outlet to form a flow duct for the exhaust gas, means for providing a cooling medium flow outside and around the flow duct, and V-shaped pairs of projections extending along the flow direction to form a row in the flow duct wherein the projections of each V-shaped pair diverge in the flow direction, the flow duct has side walls defining at least one fluid passage, and each said side wall forms a converging path with a respective leg of the V-shaped pairs.
Priority Claims (1)
Number |
Date |
Country |
Kind |
94 06 197 U |
Apr 1994 |
DEX |
|
Parent Case Info
This application is a continuation of application Ser. No. 08/425,091, filed on Apr. 14, 1995, now abandoned.
US Referenced Citations (10)
Foreign Referenced Citations (14)
Number |
Date |
Country |
0 234 942 A1 |
Sep 1987 |
EPX |
2326468 |
Dec 1974 |
DEX |
29 24 441 |
Dec 1979 |
DEX |
30 17 701 |
Jan 1981 |
DEX |
32 15 961 |
Nov 1983 |
DEX |
36 08 232 |
Sep 1987 |
DEX |
37 39 619 |
Apr 1988 |
DEX |
88 16 155.2 |
Mar 1989 |
DEX |
39 36 800 A1 |
May 1991 |
DEX |
107097 |
Apr 1989 |
JPX |
198692 |
Jul 1992 |
JPX |
283399 |
Oct 1992 |
JPX |
512365 |
Jun 1976 |
SUX |
556766 |
Oct 1943 |
GBX |
Continuations (1)
|
Number |
Date |
Country |
Parent |
425091 |
Apr 1995 |
|