WORK VEHICLE

• US 20150086314A1
• Filed: 09/25/2013
• Published: 03/26/2015
• Est. Priority Date: 09/25/2013
• Status: Active Grant

• Current Assignee: Komatsu Ltd.
• Original Assignee: Komatsu Ltd.
• Inventors: Okuda, Kozo, Kobayashi, Tsuyoshi
• Granted Patent: US 9,074,343 B2
• Time in Patent Office: Days
• US Class Current: 414/685
• CPC Class Codes: B60K 13/04 concerning exhaust collecting exhaust gases with central suction systems not forming part of vehicles, e.g. in workshops or tunnels B08B15/002, otherwise along carriageways E01C1/005; extensions for melting snow on roads E01H5/00, E01H6/00; exhaust or silencing apparatus for internal combustion engines per se F01N; pipes, joints or supports therefor F16L
• CPC Class Codes: B60Y 2200/412 Excavators
• CPC Class Codes: E02F 3/30 with a dipper-arm pivoted on a cantilever beam , i.e. boom
• CPC Class Codes: E02F 9/0866 Engine compartment, e.g. heat exchangers, exhaust filters, cooling devices, silencers, mufflers, position of hydraulic pumps in the engine compartment
• CPC Class Codes: E02F 9/0875 Arrangement of valve arrangements on superstructures arrangement of hydraulic hoses E02F9/2275 takes precedence; valves per se E02F9/2267
• CPC Class Codes: E02F 9/0883 Tanks, e.g. oil tank, urea tank, fuel tank for vehicles in general B60K15/00
• CPC Class Codes: E02F 9/0891 Lids or bonnets or doors or details thereof doors for cabins E02F9/163 takes precedence; for motor vehicles B62D25/10
• CPC Class Codes: F01N 2340/04 characterised by the arrangement of an exhaust pipe, manifold or apparatus in relation to vehicle frame or particular vehicle parts
• CPC Class Codes: F01N 2610/02 the substance being ammonia or urea
• CPC Class Codes: F01N 2610/14 Arrangements for the supply of substances, e.g. conduits
• CPC Class Codes: F01N 3/2066 Selective catalytic reduction [SCR]
• CPC Class Codes: Y02A 50/20 Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
• CPC Class Codes: Y02T 10/12 Improving ICE efficiencies

Abstract

A working vehicle includes a vehicle, an engine, an exhaust treatment apparatus, a connecting pipe, a reducing agent injection apparatus, a reducing agent pump and a guiding pipe guiding reducing agent from the pump to the injection apparatus. The engine, exhaust treatment apparatus, connecting pipe, and reducing agent injection apparatus are arranged inside an engine room of the vehicle body. The engine has a crank shaft, and intake and exhaust manifolds arranged on first and second direction sides of the crank shaft, respectively. A first accommodating space is positioned on a first direction side of the engine room. A reducing agent pump is arranged inside the first accommodating space. A guiding pipe is arranged so as to pass inside the engine room on the first direction side with regard to the crank shaft.

Claims

1. A work vehicle comprising:

a vehicle body having an engine room and a first accommodating space partitioned from the engine room;

an engine having a crank shaft, an intake manifold arranged on a first direction side of the crank shaft, and an exhaust manifold arranged on a second direction side of the crank shaft, the first direction side of the crank shaft being a first side along a direction perpendicular to a longitudinal direction of the crank shaft, and the second direction side of the crank shaft being on a second side opposite to the first side along the direction perpendicular to the longitudinal direction of the crank shaft;

an exhaust treatment apparatus configured to clean exhaust from the engine with a reducing agent;

a connecting pipe connected to the exhaust treatment apparatus, the connecting pipe being configured to conduct exhaust from the engine to the exhaust treatment apparatus;

a reducing agent injection apparatus arranged on the first direction side of to the crank shaft, the reducing agent injection apparatus being configured to inject the reducing agent inside the connecting pipe;

a reducing agent pump configured to discharge the reducing agent; and

a guiding pipe configured to guide the reducing agent from the reducing agent pump to the reducing agent injection apparatus,

the engine and the reducing agent injection apparatus being arranged inside the engine room,

the first accommodating space being positioned on a side of the engine room adjacent the first direction side of the crank shaft,

the reducing agent pump being arranged inside the first accommodating space, and

the guiding pipe being arranged so as to pass inside the engine room on the first direction side of the crank shaft.

2. The work vehicle according to claim 1, further comprising:

a hydraulic pump driven by the engine;

a work implement driven by hydraulic fluid discharged from the hydraulic pump;

a control valve configured to control the hydraulic fluid supplied to the work implement; and

a partition wall configured to partition a second accommodating space and the engine room, the second accommodating space being arranged on the side of the engine room adjacent the first direction side of the crank shaft,

the control valve being arranged inside the second accommodating space, and

the guiding pipe being arranged so as to pass inside the engine room between the partition wall and the engine.

3. The work vehicle according to claim 2, wherein

the control valve is arranged between the reducing agent pump and the reducing agent injection apparatus along a direction parallel to the longitudinal direction of the crank shaft.

4. The work vehicle according to claim 1, wherein

the vehicle body has an engine hood configured to open and close an opening positioned above the engine room, and a frame member supporting an end portion of the engine hood, and

the frame member has a bracket holding the guiding pipe.

5. The work vehicle according to claim 1, further comprising:

a main frame section arranged below the engine, the main frame section supporting the engine,

the main frame section having a left main frame and a right main frame, each of the left main frame and the right main frame being arranged so as to extend in a front and back direction,

the crank shaft being arranged so as to extend in a vehicle width direction,

the reducing agent pump being arranged on a first lateral side of the main frame section, and

the reducing agent injection apparatus being arranged on a second lateral side of the main frame section opposite to the first lateral side.

6. The work vehicle according to claim 5, wherein

the guiding pipe is arranged so as to pass above the left main frame and the right main frame, and

a lowest portion of the guiding pipe between the left main frame and the right main frame is positioned above the left main frame and the right main frame.

7. The work vehicle according to claim 2, wherein

the vehicle body has an engine hood configured to open and close an opening positioned above the engine room, and a frame member supporting an end portion of the engine hood, and

the frame member has a bracket holding the guiding pipe.

8. The work vehicle according to claim 2, further comprising:

a main frame section arranged below the engine, the main frame section supporting the engine,

the main frame section having a left main frame and a right main frame, each of the left main frame and the right main frame being arranged so as to extend in a front and back direction,

the crank shaft being arranged so as to extend in a vehicle width direction,

the reducing agent pump being arranged on a first lateral side of the main frame section, and

the reducing agent injection apparatus being arranged on a second lateral side of the main frame section opposite to the first lateral side.

9. The work vehicle according to claim 8, wherein

the guiding pipe is arranged so as to pass above the left main frame and the right main frame, and

a lowest portion of the guiding pipe between the left main frame and the right main frame is positioned above the left main frame and the right main frame.

10. The work vehicle according to claim 3, wherein

the vehicle body has an engine hood configured to open and close an opening positioned above the engine room, and a frame member supporting an end portion of the engine hood, and

the frame member has a bracket holding the guiding pipe.

11. The work vehicle according to claim 3, further comprising:

a main frame section arranged below the engine, the main frame section supporting the engine,

the main frame section having a left main frame and a right main frame, each of the left main frame and the right main frame being arranged so as to extend in a front and back direction,

the crank shaft being arranged so as to extend in a vehicle width direction,

the reducing agent pump being arranged on a first lateral side of the main frame section, and

the reducing agent injection apparatus being arranged on a second lateral side of the main frame section opposite to the first lateral side.

12. The work vehicle according to claim 11, wherein

the guiding pipe is arranged so as to pass above the left main frame and the right main frame, and

a lowest portion of the guiding pipe between the left main frame and the right main frame is positioned above the left main frame and the right main frame.

13. The work vehicle according to claim 4, further comprising:

a main frame section arranged below the engine, the main frame section supporting the engine,

the main frame section having a left main frame and a right main frame, each of the left main frame and the right main frame being arranged so as to extend in a front and back direction,

the crank shaft being arranged so as to extend in a vehicle width direction,

the reducing agent pump being arranged on a first lateral side of the main frame section, and

the reducing agent injection apparatus being arranged on a second lateral side of the main frame section opposite to the first lateral side.

14. The work vehicle according to claim 13, wherein

the guiding pipe is arranged so as to pass above the left main frame and the right main frame, and

a lowest portion of the guiding pipe between the left main frame and the right main frame is positioned above the left main frame and the right main frame.