Reducing agent tank and work vehicle

Patent metadata

Field	Value
Publication number	US-9732653-B2
Application number	US-201414359364-A
Country	US
Kind code	B2
Filing date	Jan 8, 2014
Priority date	Jan 8, 2014
Publication date	Aug 15, 2017
Grant date	Aug 15, 2017

Abstract

A reducing agent tank is provided which can improve a heat transfer efficiency to a reducing agent and transfer heat to the reducing agent in a height direction of the reducing agent tank without unevenness. The reducing agent tank includes a container main body which has an upper face and a bottom face and constitutes a space for storing the reducing agent between the upper face and the bottom face, and a heat exchanger which performs heat exchange with the reducing agent. The heat exchanger has penetrating portions and inclined portions. The penetrating portions penetrate to the upper face of the container main body and extend into the space. The inclined portions are inclined relative to the penetrating portions at a position different from each other in an extending direction of the penetrating portions and extend toward a side of the bottom face.

First claim

The invention claimed is:

1. A reducing agent tank, comprising:
a container main body which has an upper face and a bottom face and constitutes an internal space for storing a reducing agent between said upper face and said bottom face;
a heat exchanger which performs heat exchange with said reducing agent, said heat exchanger including:
a penetrating portion which penetrates through said upper face and extends into said internal space,
a first inclined portion which extends in a straight line and which is inclined relative to said penetrating portion at an obtuse angle and extends toward a side of said bottom face,
a second inclined portion which extends in a straight line and which is inclined relative to said penetrating portion at an obtuse angle and at a position different from said first inclined portion in an extending direction of said penetrating portion and extends toward a side of said bottom face, and
a suspended portion, a parallel portion, and a leading end bent portion, the suspended portion extending from the upper face toward the bottom face of the container main body, the parallel portion being joined to a lower end of the suspended portion and extending horizontally along the bottom face of the container main body, and the leading end bent portion being joined to a leading end of the parallel portion and being bent relative to the parallel portion and extending upward, the suspended portion including the penetration portion, the first inclined portion and the second inclined portion;

a suction pipe having a suction port on a leading end of the suction pipe that opens in the internal space of the container main body and that sucks out the reducing agent stored in the container main body; and
a strainer provided on the suction port,
wherein the strainer is arranged so as to be covered at side portions in two directions with the suspended portion and the leading end bent portion, and at a lower side with the parallel portion.

2. The reducing agent tank according to claim 1 , wherein said heat exchanger includes a first pipeline which guides a heat exchange medium into said container main body and a second pipeline which allows the heat exchange medium to flow out from said container main body, and
said first pipeline has said first inclined portion, and
said second pipeline has said second inclined portion.

3. The reducing agent tank according to claim 2 , wherein an end portion of said first inclined portion on a side of leaving apart from said penetrating portion is arranged closer to said upper face than an end portion of said second inclined portion on a side close to said penetrating portion.

4. The reducing agent tank according to claim 3 , further comprising a sensor unit which extends from said upper face to said bottom face, wherein
at least one of said first inclined portion and said second inclined portion comes closer to said sensor unit as leaving apart from said penetrating portion.

5. The reducing agent tank according to claim 3 , wherein in the extending direction of said penetrating portion, said first inclined portion and said second inclined portion are arranged with a distance apart from each other.

6. The reducing agent tank according to claim 2 , further comprising a sensor unit which extends from said upper face to said bottom face, wherein
at least one of said first inclined portion and said second inclined portion comes closer to said sensor unit as leaving apart from said penetrating portion.

7. The reducing agent tank according to claim 2 , wherein in the extending direction of said penetrating portion, said first inclined portion and said second inclined portion are arranged with a distance apart from each other.

8. The reducing agent tank according to claim 2 , wherein said first inclined portion is arranged closer to said upper face than said second inclined portion, and
said suction pipe includes a portion which extends along said first pipeline.

9. The reducing agent tank according to claim 8 , further comprising a sensor unit which extends from said upper face to said bottom face, wherein
at least one of said first inclined portion and said second inclined portion comes closer to said sensor unit as leaving apart from said penetrating portion.

10. The reducing agent tank according to claim 8 , wherein in the extending direction of said penetrating portion, said first inclined portion and said second inclined portion are arranged with a distance apart from each other.

11. The reducing agent tank according to claim 8 , wherein an end portion of said first inclined portion on a side of leaving apart from said penetrating portion is arranged closer to said upper face than an end portion of said second inclined portion on a side close to said penetrating portion.

12. The reducing agent tank according to claim 11 , further comprising a sensor unit which extends from said upper face to said bottom face, wherein
at least one of said first inclined portion and said second inclined portion comes closer to said sensor unit as leaving apart from said penetrating portion.

13. The reducing agent tank according to claim 1 , further comprising a sensor unit which extends from said upper face to said bottom face, wherein
at least one of said first inclined portion and said second inclined portion comes closer to said sensor unit as leaving apart from said penetrating portion.

14. The reducing agent tank according to claim 1 , wherein an end portion of said first inclined portion on a side of leaving apart from said penetrating portion and an end portion of said second inclined portion on a side of leaving apart from said penetrating portion are arranged at positions different from each other in an extending direction of said penetrating portion.

15. The reducing agent tank according to claim 14 , wherein in the extending direction of said penetrating portion, said first inclined portion and said second inclined portion are arranged with a distance apart from each other.

16. The reducing agent tank according to claim 1 , wherein in the extending direction of said penetrating portion, said first inclined portion and said second inclined portion are arranged with a distance apart from each other.

17. A work vehicle, comprising:
an engine;
an exhaust gas treatment device which performs treatment to an exhaust gas from said engine by a reductive reaction;
the reducing agent tank according to claim 1 ; and
a reducing agent injection device which injects said reducing agent sucked out from said reducing agent tank to said exhaust gas guided to said exhaust gas treatment device.

Assignees

• Komatsu Mfg Co Ltd

Inventors

• Ogawa Satoshi
• Kusaba Taisuke
• Kuse Yasutaka

Classifications

• Y02T10/12

  Improving ICE efficiencies · CPC title

• F01N3/2896 Primary

  Liquid catalyst carrier · CPC title

• F01N2610/10

  the substance being heated, e.g. by heating tank or supply line of the added substance · CPC title

• F01N3/2066 Primary

  Selective catalytic reduction [SCR] · CPC title

• F01N2610/1406

  Storage means for substances, e.g. tanks or reservoirs · CPC title