JP2018135810A - Work vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve such the problem with durability of a pressure sensor of DPF, which occurs due to vibration of a diesel engine when DPF is installed to a diesel engine.SOLUTION: DPF 21 is supported to a diesel engine E. A pressure sensor 32 is supported to a heat barrier plate 30 integrated with a machine body frame 17 via a bracket 33. The pressure sensor 32 is disposed in a vicinity position distant from DPF 21. The bracket 33 is constituted of a plate member and the flat plate surface thereof is disposed so as to be parallel to a flow of cooling air.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a work vehicle such as a combine equipped with a diesel engine, and more particularly to a work vehicle for purifying exhaust gas discharged from the diesel engine by a particulate matter removing device (diesel particulate filter, hereinafter referred to as DPF). .

  In general, exhaust gas discharged from a diesel engine contains particulate matter (PM), and a DPF for removing the particulate matter from the exhaust gas is connected to the diesel engine.

  Conventionally, the DPF is known to be attached to the rear end side (flywheel side) of the engine, and the DPF detects the pressure difference between the exhaust upstream side and the exhaust downstream side with the soot filter interposed therebetween. A pressure sensor for grasping the clogged state of the DPF is attached.

Japanese Patent No. 5872301

  The DPF is attached to an engine installed on the fuselage frame by a rubber mount, and the pressure sensor is attached to the DPF via a sensor bracket. The pressure sensor has a precise configuration for detecting the pressure difference between the upstream and downstream exhausts sandwiching the filter, but the vibration of the engine acts on the pressure sensor and affects the detection accuracy of the pressure sensor. Sometimes.

  Accordingly, an object of the present invention is to provide a work vehicle in which a pressure sensor is attached to the body frame side and the above-described problems are solved.

The present invention provides a work vehicle (1) in which a diesel engine (E) is mounted on a fuselage frame (17) with a rubber mount, and the diesel engine supports a particulate matter removing device (21).
A pressure sensor (32) for detecting a differential pressure of the particulate matter removing device (21) is separated from the particulate matter removing device (21) by a member (30, 33) integral with the body frame (17) and Supporting close position,
It is in the working vehicle characterized by this.

  For example, referring to FIG. 3 and FIG. 4, the member integrated with the fuselage frame (17) covers the diesel engine (E) and the particulate matter removing device (21) and is on the side of the driver's seat (6). A heat shield (30) disposed below the panel (15) and a bracket (33) attached to the heat shield.

For example, referring to FIGS. 2 to 4, the diesel engine (E) is stored and arranged in an engine room (16), and cooling air is supplied from the outside of the machine body to the engine room (16) by a cooling fan (19). And the cooling air flows in the engine room along the diesel engine (E) and the particulate matter removing device (21), and is discharged from an open part of the engine room.
The bracket (33) is made of a plate member, and is arranged so that the flat plate surface of the plate member is parallel to the flow of the cooling air.

  In addition, although the code | symbol in the said parenthesis is for contrast with drawing, it does not have any influence on description of a claim by this.

  According to the first aspect of the present invention, since the pressure sensor is supported by a member integrated with the airframe, the vibration of the diesel engine does not directly propagate, and the difference in DPF can be accurately detected over a long period of time. The pressure can be detected. Further, since the pressure sensor is supported at a position away from the DPF, it is possible to prevent the cooling air from flowing through the separated space and to be overheated, and the pressure sensor is disposed close to the DPF. The differential pressure of the DPF can be detected with high accuracy.

  According to the second aspect of the present invention, since the pressure sensor is supported by the heat shield plate located below the side panel via the bracket, a dedicated support structure is not required, and simple support is provided in the complicated space. With the structure, the pressure sensor can be supported at a predetermined position, and the support structure has high rigidity, so that the pressure sensor can be stably supported at the predetermined position.

  According to the third aspect of the present invention, the bracket is made of a plate member and is arranged so that the flat plate surface thereof is parallel to the flow of the cooling air. Since the plate member that does not hinder the cooling of the DPF and the pressure sensor and extends in the direction of the flat plate surface is a bracket, rigidity can be ensured.

The side view which shows the combine which concerns on embodiment of this invention. The plan view. The side view seen from the driver's seat of the said combine and the fuselage inner side of a Glen tank. The rear view seen from the back of the principal part of the said combine.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIGS. 1 and 2, the combine 1 that is a work vehicle has a body 3 that is supported by a traveling device 2 that is a pair of left and right crawler traveling devices, and in front of the body 3, A pre-processing unit 5 for cutting grain cereals in the field is provided so as to be movable up and down. A driver's seat 6 on which an operator performs a driving operation is provided on one front side (right side of the body) of the body 3. On the other side (the left side of the machine body), there is provided a threshing unit 7 for threshing and sorting the cereals harvested and transported by the preprocessing unit 5. A grain tank 9 for storing the grains threshed and selected by the threshing unit 7 is disposed behind the driver seat 6, and stored in the grain tank 9 behind the grain tank 9. A discharge auger 10 is provided for discharging the cereal grains out of the machine. A driver seat 12 is disposed in the driver seat 6, a front panel 13 is disposed in front of the driver seat 12, and a side panel 15 is disposed on the left side.

  An engine room 16 is arranged below the driver seat 12 in the driver seat 6 as shown in FIG. 3, and a diesel engine E is stored in the engine room 16 with the crankshaft in the lateral direction. . The engine E is mounted on the body frame 17 in a rubber mount, and is arranged so that the cooling fan 19 (see FIG. 2) faces the outside of the body and the output pulley 20 faces the inside of the body. Further, a DPF (particulate matter removing device) 21 is supported above the output pulley side of the engine E with the longitudinal direction being the front-rear direction.

  The cooling fan 19 sucks cooling air into the engine room 16 from the outside of the machine body due to its rotation and cools the radiator. Then, the cooling air passes through the engine room 16 along the engine E and the DPF 21 inside the machine body. It flows to (threshing part 7 side) and is discharged from the open part of the engine room. The rotation of the output pulley 20 of the engine E is transmitted to the mission in the mission case 23 via the belt 22 and further transmitted to the traveling device 2 and each working unit. The mission case 23 is integrated with the body frame 17, and together with the frames such as the driver's seat frame 25 attached to the body frame 17, the body 3 is configured.

  The driver's seat frame 25 is erected upward from the body frame 17 to constitute the engine room 16, and a column 26 is erected on the upper part of the transmission case 23. A side frame 27 is fixed to the upper portion of the column 26, and a rear end portion of the side frame 27 is fixed to the driver's seat frame 25 through a connecting frame 29. The side panel 15 is disposed on the upper portion of the side frame 27, and a heat shield plate 30 as a flat plate member is attached to the lower portion thereof.

  As shown in FIG. 4, the heat shield plate 30 extends horizontally in the direction of the fuselage inner side of the driver's seat frame 25, covers the upper side of the engine E and the DPF 21, and heat generated by the engine E etc. is transmitted to the side panel 15. Block things. The front end of the DPF 21 communicates with the exhaust port of the engine E, and the rear end thereof communicates with the exhaust pipe 31. The exhaust gas of the diesel engine E is guided to the DPF 21, and the particulate matter contained in the exhaust gas (PM) is collected by the soot filter and removed by burning the PM. The DPF 21 includes a pressure sensor 32 that detects a pressure difference between the exhaust upstream side and the exhaust downstream side sandwiching the soot filter, and deposits PM of the soot filter based on the pressure difference by the pressure sensor 32. The amount is converted and the clogged state in the DPF 21 is grasped.

  The pressure sensor 32 is attached to the lower surface of the heat shield plate 30 via a bracket 33. The pressure sensor 32 is in a position close to the DPF 21, but is separated from the DPF 21 and is in a position where the vibration of the rubber-mounted engine E is not directly transmitted. The bracket 33 is made of a plate member and is disposed so that a flat plate surface extends in the width direction.

  The combine 1 is driven by the power of the diesel engine E. The cooling fan 19 is rotated by the rotation of the diesel engine E, and outside air is introduced into the engine room 16 from the side of the body 3. Cooling air from the cooling fan 19 cools the radiator and flows along the engine E and the DPF 21 and is discharged from an open portion inside the airframe 3. The bracket 33 is disposed so that the flat plate surface thereof is parallel to the flow of the cooling air, and does not hinder the flow of the cooling air. Further, the pressure sensor 32 is disposed away from the DPF 21 and the engine E, and the cooling air flows through the separated space, so that the heat of the engine E and the DPF 21 is not directly transmitted to the pressure sensor 32. While preventing the sensor 32 from being overheated, the pressure sensor 32 is located in the vicinity of the DPF 21 to ensure the detection accuracy of the pressure sensor 32.

  Exhaust gas accompanying driving of the diesel engine E is guided to the DPF 21 from the exhaust hole, purified by the DPF, and discharged from the exhaust pipe 31. The diesel engine E is supported on the body frame 17 via rubber, and the vibration of the engine E is absorbed by the body frame 17. The pressure sensor 32 is supported by a heat shield 30 integrated with the body frame 17 via a bracket 33, and the vibration of the engine E does not act directly. As a result, the pressure sensor 32, which is a precision instrument, is disposed close to the DPF 21, but the vibration of the engine E does not act directly, the influence of the vibration is small, and the above differential pressure over a long period of time with high accuracy. Can be detected. Further, since the pressure sensor 32 is supported by the heat shield plate 30 that prevents the heat of the engine or the like from being transmitted to the driver's seat 6, a special support structure for supporting the pressure sensor is not required, and the width is wide. Therefore, it can be supported with sufficient rigidity.

  In addition, although the said embodiment was applied to the combine, it is applicable not only to this but to every working vehicle carrying a diesel engine. The DPF is applicable to all kinds of DPFs. Further, although the pressure sensor 32 is attached to the heat shield plate 30, the member is not limited to the heat shield plate and may be a member integrated with another body frame 17.

1 Work vehicle (combine)
3 Airframe 6 Driver's seat 15 Side panel 16 Engine room 17 Airframe frame 19 Cooling fan 21 Particulate material removal device (DPF)
30 Heat shield (flat plate member)
32 Pressure sensor 33 Bracket

Claims (3)

In a work vehicle in which a diesel engine is mounted on a fuselage frame with a rubber mount, and the diesel engine supports a particulate matter removing device,
A pressure sensor for detecting a differential pressure of the particulate matter removing device is supported by a member integral with the body frame at a position apart from and close to the particulate matter removing device.
A working vehicle characterized by that. The member that is integral with the fuselage frame is a heat shield that covers the diesel engine and the particulate matter removing device and that is disposed below the side panel of the driver's seat, and a bracket attached to the heat shield.
The work vehicle according to claim 1. The diesel engine is stored and arranged in an engine room, and cooling air is guided into the engine room from outside the airframe by a cooling fan, and the cooling air flows in the engine room through the diesel engine and the particulate matter removing device. And discharged from the open part of the engine room,
The bracket is made of a plate member, and is arranged so that a flat plate surface of the plate member is parallel to the flow of the cooling air.
The work vehicle according to claim 2.

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