1. An exhaust purification device for an engine, comprising:
a catalytic device disposed in an exhaust passage of the engine, for purifying exhaust discharged from the engine by using an additive;
deflecting means disposed upstream of the catalytic device in the exhaust passage, for allowing the exhaust to flow through downstream and deflecting the flow of the exhaust, thereby causing the exhaust to be agitated;
additive injection means disposed downstream of the deflecting means in the exhaust passage, for injecting an additive into the exhaust passage;
temperature detection means disposed downstream of the deflecting means in the exhaust passage, for detecting exhaust temperature; and
control means for controlling the additive injection means on the basis of the exhaust temperature detected by the temperature detection means,
wherein the temperature detection means has a temperature detection part located within a region where the flow of the exhaust deflected and thereby increased in velocity when passing through the deflecting means maintains a state in which the velocity is increased,
wherein the deflecting means comprises:
a base plate dividing the exhaust passage into upstream and downstream sections, the base plate having an annular array of a plurality of passage holes defined by a plurality of radially-extending connection portions, and
a plurality of fins extending continuously from the respective connection portions to the same side, in a manner following the annular array, the fins being raised from the base plate to project downstream,
wherein the deflecting means allows the exhaust to flow through the passage holes and deflects the flow of the exhaust with the fins, thereby causing the exhaust to form whirling flow in the downstream section of the exhaust passage, and
wherein the temperature detection part of the temperature detection means is located near the passage hole corresponding to a particular fin of the fins, between the edge of the particular fin and the base plate in the direction perpendicular to the base plate, and between the edge of the particular fin and the boundary connecting the fin adjacent to the edge of the particular fin with the connection portion in the direction of array of the fins.
2. The exhaust purification device for the engine according to claim 1, wherein
the catalytic device is a selective reduction-type NOx catalyst designed to selectively reduce NOx in the exhaust by using ammonia as a reducing agent; and
the additive injection means injects urea aqueous solution as the additive.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
In the claims:
1. A ball-and-socket joint, comprising:
a housing;
a bearing shell inserted into said housing;
a ball pivot with a joint ball mounted pivotally in all directions in said bearing shell;
a sealing bellows between the housing and the ball pivot, said sealing bellows having a pivot-side edge area;
a ball race fixed on said ball pivot; and
a sliding ring receiving said pivot-side edge area of said sealing bellows, said sliding ring being slidingly mounted in said ball race and having a sliding face facing the joint ball arranged adjacent to the ball race.
2. A ball-and-socket joint in accordance with claim 1, wherein:
said sliding ring includes a collar made in one piece with said sliding ring.
3. A joint in accordance with claim 2, wherein:
said collar engages said pivot-side edge area of said sealing bellows.
4. A joint in accordance with claim 2, wherein:
said collar is made in one piece with an inner side of said sliding ring, said sliding ring cooperates with said pivot-side edge area of said sealing bellows in at least some areas.
5. A joint in accordance with claim 1, wherein:
said sliding ring includes an axial extension and a radial extension.
6. A joint in accordance with claim 1, wherein:
said race and said sliding ring define a gap between said race and said sliding ring.
7. A joint in accordance with claim 5, wherein:
said race and said sliding ring define a gap between said axial extension and a surface of said ball race.
8. A ball-and-socket joint in accordance with claim 7, wherein:
said sliding ring has an approximately L-shaped cross section comprising an axial leg as said axial extension and a radial leg as said radial extension, said radial leg is in sliding contact with an inner surface of said ball race.
9. A ball-and-socket joint in accordance with claim 1, wherein:
said ball race has an approximately U-shaped cross section.
10. A ball-and-socket joint in accordance with claim 1, wherein:
said sealing bellows has a surface slidingly in contact with a surface of said ball race.
11. A ball-and-socket joint in accordance with claim 10, wherein:
said surface of said sealing bellows which is in contact with said surface of said ball race has a sealing lip in contact with said surface of said ball race.
12. A ball-and-socket joint in accordance with claim 10, wherein:
said surface of said sealing bellows which is in contact with said surface of said ball race forms a labyrinth seal together with said surface-of said ball race.
13. A ball-and-socket joint in accordance with claim 10, wherein:
said surface of said sealing bellows which is in contact with said surface of said ball race has a sealing lip and a second surface of said sealing bellows forms a labyrinth seal together with said surface of said ball race.
14. A ball-and-socket joint in accordance with claim 5, wherein:
said sliding ring is a shaped sheet metal part or a plastic molding;
said sliding ring receives and holds a portion of said sealing bellows between said radial and axial extensions;
said radial and axial extensions are substantially perpendicular to each other;
said ball race is fixed to said ball pivot.
15. A ball-and-socket joint in accordance with claim 1, wherein:
said ball race has a leg which is in contact with said sliding ring, said leg comprising lugs arranged at spaced locations from one another.
16. A ball-and-socket joint in accordance with claim 1, wherein:
said sliding ring has at least one radially extending slot.
17. A ball-and-socket joint in accordance with claim 1, wherein:
said pivot-side edge area of said sealing bellows forms a thickened material bead, which is pressed against said ball race or said sliding ring with an elastic pretension.
18. A joint in accordance with claim 1, wherein:
said sliding ring has a disk shape.
19. A joint in accordance with claim 1, wherein:
said sliding ring is slotted.
20. A ball-and-socket joint in accordance with claim 1, wherein:
said sliding ring has an approximately L shaped cross section.
21. A ball-and-socket joint in accordance with claim 1, wherein:
said sliding ring has an approximately T shaped cross section.
22. A ball-and-socket joint in accordance with claim 1, wherein:
said sliding ring has an approximately F shaped cross section.
23. A ball-and-socket joint in accordance with claim 1, wherein:
said sliding ring is vulcanized directly to said pivot-side edge area of said sealing bellows.
24. A ball-and-socket joint sealing connection for a joint having a housing, a bearing shell inserted into the housing and a ball pivot with a joint ball mounted movably in all directions in the bearing shell, the joint sealing connection comprising:
a sealing bellows connected between the housing and the ball pivot, said sealing bellows having a pivot-side edge area;
a ball race fixed on said ball pivot; and
a sliding ring receiving the pivot-side edge area of said sealing bellows, said sliding ring including an axial extension and a radial extension, said sliding ring being slidingly connected to said ball race and having a sliding face facing the joint ball arranged adjacent to the ball race.
25. A ball-and-socket joint, comprising:
a housing;
a bearing shell arranged in said housing
a ball pivot with a joint ball mounted pivotally in said bearing shell;
a sealing bellows arranged between said housing and said ball pivot, said sealing bellows including a pivot-side edge area;
a race fixed on said ball pivot; and
a sliding ring receiving said pivot-side edge area of said sealing bellows, said sliding ring being slidingly arranged in said race.
26. A joint in accordance with claim 25, wherein:
said sliding ring has a sliding face facing the joint ball and arranged adjacent to said race, said sliding face of said ring sliding around said race.
27. A joint in accordance with claim 25, wherein:
said sliding ring is rotatable around said race and said ball pivot.