WORKING VEHICLE

• US 20160311314A1
• Filed: 12/10/2014
• Published: 10/27/2016
• Est. Priority Date: 12/11/2013
• Status: Active Grant

• Current Assignee: Yanmar Power Technology Co., Ltd. (Yanmar Holdings Co., Ltd.)
• Original Assignee: Yanmar Company Limited (Yanmar Holdings Co., Ltd.)
• Inventors: KUROKAWA, Yoshiaki
• Granted Patent: US 9,783,042 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: A01B 76/00 Parts, details or accessories of agricultural machines or implements, not provided for in groups A01B51/00 - A01B75/00
• 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 2200/221 Tractors
• 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 9/0883 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 13/008 Mounting or arrangement of exhaust sensors in or on exhaust apparatus sensor arrangements for engine control F02D41/1439
• CPC Class Codes: F01N 2470/00 Structure or shape of gas passages, pipes or tubes
• CPC Class Codes: F01N 2470/14 Plurality of outlet tubes, e.g. in parallel or with different length
• CPC Class Codes: F01N 2610/02 the substance being ammonia or urea
• CPC Class Codes: F01N 2610/1406 Storage means for substances, e.g. tanks or reservoirs
• CPC Class Codes: F01N 3/021 by means of filters
• CPC Class Codes: F01N 3/023 using means for regenerating the filters, e.g. by burning trapped particles by electrically controlling the supply of combustible mixture or its constituents only F02D41/0235
• CPC Class Codes: F01N 3/103 Oxidation catalysts for HC and CO only
• CPC Class Codes: F01N 3/206 Adding periodically or continuously substances to exhaust gases for promoting purification, e.g. catalytic material in liquid form, NOx reducing agents F01N3/2066 takes precedence
• 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

Abstract

An engine device of a working vehicle is capable of easily enhancing heat-retaining properties of a first case or a second case, and capable of easily forming, between an outer top plate and an inner top plate, a heat shield space in which a differential pressure sensor can be installed. The working vehicle includes an operation cabin on which an operator rides, the first case for removing particulate matter in exhaust gas in an engine, the second case for removing nitrogen oxide in exhaust gas of the engine, and a hood for covering an upper surface of the engine, and a top plate portion of the hood opposed to one or both of the first case and the second case placed on the upper surface of the engine is formed into a double structure from the outer top plate and the inner top plate.

Claims

1. A working vehicle comprising an operation portion on which an operator rides, a first case for removing particulate matter in exhaust gas of an engine, and a second case for removing nitrogen oxide in exhaust gas of the engine, wherein

the working vehicle further includes a hood for covering an upper surface of the engine, and a top plate portion of the hood opposed to one or both of the first case and the second case placed on the upper surface of the engine is formed into a double structure from an outer top plate and an inner top plate.

2. The working vehicle according to claim 1, further comprising an exhaust gas differential pressure sensor or an exhaust gas temperature sensor for detecting exhaust gas pressure or exhaust gas temperature of the first case or the second case, and a sensor bracket for supporting the exhaust gas differential pressure sensor or a harness connector, wherein

the sensor or the harness connector is placed in a heat shield space between the outer top plate and the inner top plate through the sensor bracket.

3. The working vehicle according to claim 1, wherein a rear end of a front/rear connection frame is connected to a rear frame which stands on a traveling machine body on a side of the operation portion, a front end of the front/rear connection frame is connected to a front frame which stands on the traveling machine body on a side of a radiator, the hood is supported by the rear frame through an open/close fulcrum shaft, the rear frame is provided with a hood support frame body through the open/close fulcrum shaft, and the outer top plate and the inner top plate are stretched from one end to the other end of the hood support frame body.

4. The working vehicle according to claim 1, further comprising a urea mixing pipe for connecting the second case to the first case, and a urea water tank for supplying urea water to the urea mixing pipe, wherein

the first case, the second case, and the urea mixing pipe are placed near a lower surface of the inner top plate, and the urea water tank is placed on the traveling machine body, on which the engine is provided, on a lower side of the operation portion.