Work vehicle

Patent metadata

Field	Value
Publication number	US-10487711-B2
Application number	US-201715489380-A
Country	US
Kind code	B2
Filing date	Apr 17, 2017
Priority date	Oct 15, 2014
Publication date	Nov 26, 2019
Grant date	Nov 26, 2019

Abstract

A work vehicle includes an engine, a post-processing device, and a cooling fan. The engine is mounted on a front portion of a travelling machine body. The post-processing device purifies exhaust gas of the engine. The cooling fan water-cools the engine. The cooling fan is located in front of the engine. The cooling fan, the engine, and the post-processing device are covered with a hood. The hood includes a shield. The shield covers a lower section of the post-processing device and one side of the engine. The shield is a perforated plate including a plurality of holes.

First claim

What is claimed is:

1. A work vehicle comprising:
an engine mounted on a front portion of a travelling machine body;
a post-processing device mounted above the engine via a support bracket and configured to purify exhaust gas of the engine;
a cooling fan in front of the engine and configured to cool the engine;
a hood configured to cover the cooling fan, the engine, and the post-processing device;
a shield covering a lower section of the post-processing device and one side of the engine, wherein an entirety of the shield is interposed between a first side of the hood and each of:
the engine,
the post-processing device, and
a space between the engine and the post-processing device; and

the post-processing device coupled to an exhaust manifold on one side of the engine, the exhaust manifold being covered with the shield, the work vehicle further comprising:
a heat insulator below the exhaust manifold and coupled to one side of the engine; and
a starter below the heat insulator.

2. The work vehicle according to claim 1 , wherein the shield comprises a perforated plate comprising a plurality of holes.

3. The work vehicle according to claim 1 , wherein the shield comprises a perforated plate comprising a plurality of holes arranged in a matrix.

4. The work vehicle according to claim 1 , wherein the shield comprises a perforated plate comprising elongated holes arranged side by side.

5. The work vehicle according to claim 3 , further comprising:
an EGR cooler below the exhaust manifold and configured to cool some of the exhaust gas from the exhaust manifold; and
a metal plate below the shield and covering an outer side of the EGR cooler.

6. The work vehicle according to claim 3 , wherein the shield comprises a perforated plate in which an open area of a section close to the post-processing device is greater than an open area of a section close to a lower section of the exhaust manifold.

7. The work vehicle according to claim 1 , further comprising:
a plurality of heat exchangers configured to allow cooling air guided by the cooling fan to pass through the heat exchangers to exchange heat with a cooling medium; and
a bottom plate over an upper surface of a front section of the travelling machine body, the hood and the bottom plate comprising opening portions at positions forward of the cooling fan, the hood and the bottom plate being configured to introduce cooling air into the hood through the opening portions when the cooling fan is driven.

8. The work vehicle according to claim 1 , further comprising:
a radiator configured to water-cool the engine;
a fan shroud surrounding the cooling fan; and
a sensor secured to an upper section of the fan shroud and configured to measure an internal environment of the post-processing device, which is mounted above the engine.

9. The work vehicle according to claim 1 , wherein the post-processing device is mounted above the engine via the support bracket, the work vehicle further comprising:
a pipe securing bracket standing upright above the engine to cover an outer surface of the post-processing device and configured to secure, to the engine, an external supply pipe that supplies coolant that circulates in the engine and to a device outside the engine.

10. The work vehicle according to claim 9 , further comprising a sensor configured to measure an internal environment of the post-processing device, the sensor being configured to be secured to the pipe securing bracket, while the external supply pipe is disposed between the pipe securing bracket and the post-processing device, wherein the pipe securing bracket is disposed between the sensor and the post-processing device.

11. The work vehicle according to claim 1 , further comprising:
an operator's seat above the travelling machine body and at a rear of the engine; and
a U-shaped exhaust pipe secured in front of the operator's seat and configured to discharge exhaust gas from the post-processing device to the outside, the U-shaped exhaust pipe comprising a drain hole configured to drain water at a section of the U-shaped exhaust pipe, the work vehicle further comprising a wind direction plate coupled to the U-shaped exhaust pipe to cover the drain hole from below on one side of the drain hole.

12. The work vehicle according to claim 1 , wherein:
the lower section of the post-processing device comprising a bottom portion and one or more side portions including the side portion; and
the post-processing device comprises a front side, a rear side opposite the front side, a top side, a bottom side opposite the top side, a first side, and a second side opposite the first side.

13. The work vehicle according to claim 1 , wherein the shield includes a planar surface having a first portion interposed between the post-processing device and the first side of the hood, and a second portion interposed between the post-processing device and the first side of the hood.

14. The work vehicle according to claim 1 , further comprising a hood shield covering at least a rear of the post-processing device, wherein:
a longitudinal direction of the post-processing device defines a line which intersects the post-processing device and the hood shield; and
the shield configured to enable air heated by the engine to pass through the shield.

15. A work vehicle comprising:
an engine mounted on a front portion of a travelling machine body;
a cooling fan in front of the engine and configured to cool the engine;
a post-processing device above the engine and configured to purify exhaust gas of the engine;
an exhaust manifold coupled to the post-processing device on one side of the engine;
a heat insulating member positioned below the exhaust manifold and coupled to the one side of the engine;
a shield covering the one side of the engine, a side portion of a lower section of the post-processing device, and the exhaust manifold, the shield comprises a planar surface having a first portion interposed between the post-processing device and a first side of a hood, and a second portion interposed between the engine and the first side of the hood; and
the hood configured to cover the engine, the cooling fan, the post-processing device, and the shield.

16. The work vehicle according to claim 15 , further comprising:
a pipe securing bracket above the engine to cover an outer surface of the post-processing device and configured to secure an external supply pipe to the engine; and
a sensor configured to measure an internal environment of the post-processing device, the sensor configured to be secured to the pipe securing bracket such that the pipe securing bracket is disposed between the sensor and the post-processing device and such that the external supply pipe is disposed between the pipe securing bracket and the post-processing device; and
wherein the shield is configured to enable air heated by the engine to pass from a first side of the shield that faces the engine, through the shield, to a second side of the shield that faces away from the engine and is opposite the first side of the shield.

17. The work vehicle according to claim 16 , further comprising:
a pipe securing bracket above the engine to cover an outer surface of the post-processing device and configured to secure an external supply pipe to the engine; and
a sensor configured to measure an internal environment of the post-processing device, the sensor configured to be secured to the pipe securing bracket such that the pipe securing bracket is disposed between the sensor and the post-processing device and such that the

Assignees

• Yanmar Co Ltd

Inventors

• Kurokawa Yoshiaki
• Hasegawa Satoshi
• Adachi Masahito

Classifications

• F01N13/08

  Other arrangements or adaptations of exhaust conduits {(pipes, joints or supports therefor in general F16L; collecting or removing exhaust gases of vehicle engines in workshops B08B15/00, on highways E01C1/005)} · CPC title

• B60K11/06 Primary

  with air cooling · CPC title

• F01N2590/08

  for heavy duty applications, e.g. trucks, buses, tractors, locomotives · CPC title

• F01N13/008

  Mounting or arrangement of exhaust sensors in or on exhaust apparatus (sensor arrangements for engine control F02D41/1439) · CPC title

• F01N3/08 Primary

  for rendering innocuous (using electric or electrostatic separators F01N3/01; chemical aspects B01D53/92) · CPC title