JP7652019B2 - Work vehicles - Google Patents

Description

The present invention relates to work vehicles such as agricultural tractors.

Work vehicles such as agricultural tractors are known (see, for example, Patent Document 1).

JP 2018-103871 A

However, for work vehicles such as the conventional agricultural tractors described above, efficient realization of good cooling function according to engine environmental performance, etc. is not necessarily sufficient.

The present invention takes into consideration the above-mentioned conventional problems and aims to provide a work vehicle that can efficiently achieve good cooling function according to the engine environmental performance, etc.

The first aspect of the present invention is a radiator for cooling an engine that uses fuel to generate power and is attached to a vehicle body;
an oil cooler disposed in front of the radiator;
a first fuel cooler for cooling the fuel entering the engine side;
a second fuel cooler for cooling the fuel exiting the engine side;
a base plate member disposed below the first fuel cooler and the second fuel cooler;
a wall plate member having a left wall plate portion disposed on a left side of the vehicle body and a right wall plate portion disposed on a right side of the vehicle body;
It is equipped with
At least a portion of the first fuel cooler is disposed forward of the oil cooler,
At least a portion of the second fuel cooler is disposed above the oil cooler,
a hole is provided in the base plate member for introducing a first fuel pipe member connected to the first fuel cooler and a second fuel pipe member connected to the second fuel cooler to a lower side of the base plate member between the left wall plate portion and the right wall plate portion;
the first fuel pipe member and the second fuel pipe member are isolated from the engine by the radiator above the base plate member, and are isolated from the engine by a crank pulley cover below the base plate member,
the wall plate member is provided with holes for drawing the first fuel pipe member and the second fuel pipe member connected to the engine outward from the wall plate member with respect to a vehicle body left-right direction;
the engine is disposed between the left wall plate portion and the right wall plate portion,
The first fuel pipe member pulled out to the outside of the wall plate member, and the second fuel pipe member pulled out to the outside of the wall plate member and connected to the engine, are routed through an inside of a cooling water drain hose with respect to the left-right direction of the vehicle body.
As a result, the work vehicle is provided with a first fuel cooler that cools fuel entering the engine side and a second fuel cooler that cools fuel exiting the engine side, so that a good cooling function according to the engine environmental performance and the like can be efficiently realized. Note that as a result, holes for pulling the first fuel pipe member connected to the first fuel cooler and the second fuel pipe member connected to the second fuel cooler into the underside of the base plate member between the left wall plate portion and the right wall plate portion are provided in the base plate member, so that efficient arrangement of the pipe members can also be realized. Also, as a result, holes for pulling the first fuel pipe member and the second fuel pipe member connected to the engine outward from the wall plate member based on the left-right direction of the vehicle body are provided in the wall plate member, so that efficient arrangement of the pipe members can also be realized.
A first aspect of the present invention relates to a radiator for cooling an engine that uses fuel to generate power and is attached to a vehicle body;
an oil cooler disposed in front of the radiator;
a first fuel cooler for cooling the fuel entering the engine side;
a second fuel cooler for cooling the fuel exiting the engine side;
It is equipped with
At least a portion of the first fuel cooler is disposed forward of the oil cooler,
The work vehicle is characterized in that at least a portion of the second fuel cooler is disposed above the oil cooler.

As a result, the work vehicle is equipped with a first fuel cooler that cools the fuel entering the engine side and a second fuel cooler that cools the fuel leaving the engine side, so it can efficiently achieve good cooling function according to the engine environmental performance, etc.

A second aspect of the present invention relates to a radiator having a support plate member supported by a support member used for mounting the radiator,
In a work vehicle according to a first aspect of the present invention , the first fuel cooler is held together with the oil cooler by the holding plate member.

As a result, the first fuel cooler, together with the oil cooler, is held by the retaining plate member, which makes it possible to efficiently reduce the number of cooler parts.

A third invention related to the present invention is a work vehicle of the second invention related to the present invention, characterized in that the second fuel cooler has a vertical cooling pipe section whose pipe length direction is vertical, and a horizontal cooling pipe section whose pipe length direction is horizontal.

As a result, the second fuel cooler has a vertical cooling pipe section whose pipe length direction is vertical, and a horizontal cooling pipe section whose pipe length direction is horizontal, allowing for an efficient spatial arrangement of the cooler components.

A fourth invention related to the present invention is a work vehicle of the third invention related to the present invention, characterized in that the second fuel cooler is held by the holding plate member at least at the position of the vertical cooling pipe section.

As a result, the second fuel cooler is held by the holding plate member at least at the position of the vertical cooling pipe section, achieving efficient holding of the cooler components.

A fifth aspect of the present invention relates to a fuel cooler including: a base plate member disposed below the first fuel cooler and the second fuel cooler;
a wall plate member having a left wall plate portion disposed on a left side of the vehicle body and a right wall plate portion disposed on a right side of the vehicle body;
It is equipped with
a hole is provided in the base plate member for introducing a first fuel pipe member connected to the first fuel cooler and a second fuel pipe member connected to the second fuel cooler to a lower side of the base plate member between the left wall plate portion and the right wall plate portion;
This is a work vehicle of a first invention related to the present invention, characterized in that the first fuel pipe member and the second fuel pipe member are isolated from the engine by the radiator above the base plate member, and are isolated from the engine by a crank pulley cover below the base plate member.

As a result, holes are provided in the base plate member for pulling the first fuel pipe member connected to the first fuel cooler and the second fuel pipe member connected to the second fuel cooler under the base plate member between the left wall plate portion and the right wall plate portion, allowing for efficient routing of the pipe members.

A sixth aspect of the present invention is a fuel injection system including a fuel injection valve, the fuel injection valve being provided with holes in the wall plate member for drawing the first fuel pipe member and the second fuel pipe member connected to the engine outward from the wall plate member with respect to a left-right direction of a vehicle body;
the engine is disposed between the left wall plate portion and the right wall plate portion,
The first fuel pipe member pulled out to the outside of the wall plate member and the second fuel pipe member pulled out to the outside of the wall plate member and connected to the engine are routed through an inside of a cooling water drain hose with respect to the left-right direction of the vehicle body.

As a result, holes are provided in the wall plate member for pulling the first fuel pipe member and the second fuel pipe member connected to the engine outward from the wall plate member with respect to the left-right direction of the vehicle body, allowing for efficient routing of the pipe members.

The present invention makes it possible to provide a work vehicle that can efficiently achieve good cooling function according to the engine's environmental performance, etc.

FIG. 1 is a left side view of an agricultural tractor according to an embodiment of the present invention; FIG. 1 is a partial perspective view (part 1) of an oil cooler, a first fuel cooler, and a second fuel cooler of an agricultural tractor according to an embodiment of the present invention; FIG. 2 is a partial perspective view (part 2) of the oil cooler, the first fuel cooler, and the second fuel cooler of the agricultural tractor according to the embodiment of the present invention; FIG. 3 is a partial perspective view (part 3) of the oil cooler, the first fuel cooler, and the second fuel cooler of the agricultural tractor according to the embodiment of the present invention; FIG. 4 is a partial perspective view of the oil cooler, the first fuel cooler, and the second fuel cooler of the agricultural tractor according to the embodiment of the present invention; FIG. 5 is a partial perspective view of the oil cooler, the first fuel cooler, and the second fuel cooler of the agricultural tractor according to the embodiment of the present invention; FIG. 6 is a partial perspective view of the oil cooler, the first fuel cooler, and the second fuel cooler of the agricultural tractor according to the embodiment of the present invention; FIG. 7 is a partial perspective view of the oil cooler, the first fuel cooler, and the second fuel cooler of the agricultural tractor according to the embodiment of the present invention; FIG. 8 is a partial perspective view of the oil cooler, the first fuel cooler, and the second fuel cooler of the agricultural tractor according to the embodiment of the present invention; FIG. 9 is a partial perspective view of the oil cooler, the first fuel cooler, and the second fuel cooler of the agricultural tractor according to the embodiment of the present invention; FIG. 10 is a partial perspective view of the oil cooler, the first fuel cooler, and the second fuel cooler of an agricultural tractor according to an embodiment of the present invention; FIG. 11 is a partial perspective view of the oil cooler, the first fuel cooler, and the second fuel cooler of the agricultural tractor according to the embodiment of the present invention; FIG. 12 is a partial perspective view of the oil cooler, the first fuel cooler, and the second fuel cooler of the agricultural tractor according to the embodiment of the present invention; FIG. 13 is a partial perspective view of the oil cooler, the first fuel cooler, and the second fuel cooler of the agricultural tractor according to the embodiment of the present invention; FIG. 14 is a partial perspective view of the oil cooler, the first fuel cooler, and the second fuel cooler of the agricultural tractor according to the embodiment of the present invention; FIG. 15 is a partial perspective view of the oil cooler, the first fuel cooler, and the second fuel cooler of the agricultural tractor according to the embodiment of the present invention. FIG. 16 is a partial perspective view of the oil cooler, the first fuel cooler, and the second fuel cooler of the agricultural tractor according to the embodiment of the present invention; FIG. 17 is a partial perspective view of the oil cooler, the first fuel cooler, and the second fuel cooler of the agricultural tractor according to the embodiment of the present invention; FIG. 18 is a partial perspective view of the oil cooler, the first fuel cooler, and the second fuel cooler of the agricultural tractor according to the embodiment of the present invention; FIG. 19 is a partial perspective view of the oil cooler, the first fuel cooler, and the second fuel cooler of the agricultural tractor according to the embodiment of the present invention; FIG. 20 is a partial perspective view of an oil cooler, a first fuel cooler, and a second fuel cooler of an agricultural tractor according to an embodiment of the present invention;

The embodiment of the present invention will be described in detail with reference to the drawings.

The same applies below, but some components may not be shown in the drawings or may be shown in perspective or in an omitted form.

(A) First, the configuration and operation of the agricultural tractor of this embodiment will be specifically described with reference to Figures 1 to 7.

Here, FIG. 1 is a left side view of an agricultural tractor according to an embodiment of the present invention, and FIGS. 2 to 7 are partial perspective views (parts 1 to 6) of the oil cooler 200, and the first fuel cooler 310 and the second fuel cooler 320 of the agricultural tractor according to an embodiment of the present invention.

The agricultural tractor in this embodiment is an example of a work vehicle in the present invention.

First, the basic configuration and operation of the agricultural tractor of this embodiment will be explained. Therefore, the specific configurations and operations related to the oil cooler 200, as well as the first fuel cooler 310 and the second fuel cooler 320 will be explained in detail later.

An engine 30 is mounted inside the bonnet 31 at the front of the vehicle body 10.

The rotational power of the engine 30 is transmitted through various clutches inside a transmission case located below the floor 21 of the driving unit 20. More specifically, the rotational power that has been changed in speed by the main transmission and the sub-transmission is transmitted to a pair of left and right front wheels 40 and a pair of left and right rear wheels 50.

A steering wheel 23 is provided behind the engine 30, along with a dashboard cover, meter panel, and forward/reverse lever.

The driver's seat 22 is provided behind the steering wheel 23.

A brake pedal, a disconnection pedal, and a clutch pedal are arranged on the left floor 21. A pair of left and right brake pedals and an accelerator pedal 24 are arranged on the right floor 21.

A work machine is attached to the rear of the vehicle body 10, for example, using a three-point linkage mechanism.

The work machine lifting mechanism 60 has a main cylinder, a lift arm, a top link 61, a pair of left and right lower links 62, a rotating cover and a side cover.

The front ends of the top link 61 and the lower link 62 are connected to the vehicle body 10, and the rear ends of the top link 61 and the lower link 62 are connected to the work machine. The rear end of the lift arm, which is rotated by the main cylinder, is connected to the lower link 62.

The rotation angle of the rotating cover is detected by a tillage depth sensor, and the rotation angle of the lift arm is detected by a lift arm sensor.

Information about the work machine is acquired using a work machine installation status acquisition unit such as an ISO (International Organization for Standardization) BUS connected to the work machine or an information terminal mounted on the operation unit 20, and is notified to the controller.

The radiator 100 is a radiator that cools the engine 30 attached to the vehicle body 10, which uses fuel to generate power.

The oil cooler 200 is located in front of the radiator 100.

In the fuel tank breather configuration of a so-called stage 5 engine, it is required to reduce the fuel temperature to satisfy the fuel temperature standard, so a configuration is adopted in which the fuel cooler is placed in two locations on the engine inlet side and engine outlet side of the three-cylinder engine 30 by utilizing the first fuel cooler 310 and the second fuel cooler 320.

The first fuel cooler 310 is a fuel cooler that cools the fuel entering the engine 30.

The second fuel cooler 320 is a fuel cooler that cools the fuel coming out from the engine 30 side.

Unburned fuel in the engine 30 that has passed through the first fuel cooler 310 generates harmful substances such as soot in the exhaust gas, but if the fuel particles injected into the engine cylinder are small, the generation of such harmful substances is reduced. Therefore, in the engine 30, which is a common rail engine, the fuel that has been compressed and temporarily stored in the common rail is injected into the engine cylinder at high pressure through fine nozzles so that the fuel particles become small. The temperature of the remaining fuel that has been stored in the common rail but not injected into the engine cylinder increases with compression, so it is passed through the second fuel cooler 320 to be cooled and then returned to the fuel tank 32.

The cooling using such a first fuel cooler 310 and a second fuel cooler 320 may be performed on a coolant such as cooling water to cool the fuel, instead of on the fuel.

At least a portion of the first fuel cooler 310 is positioned in front of the oil cooler 200.

At least a portion of the second fuel cooler 320 is positioned above the oil cooler 200.

Of course, in order to efficiently arrange and stably hold parts in the small space inside the engine room, the first fuel cooler 310 and the second fuel cooler 320, which are located between the battery 33 and the radiator 100, may be arranged in parallel with respect to the left-right direction of the vehicle body.

(B) Next, the configuration and operation of the agricultural tractor of this embodiment will be explained in more detail, mainly with reference to Figures 8 to 17.

Here, Figures 8 to 17 are partial perspective views (numbers 7 to 16) of the oil cooler 200 of an agricultural tractor according to an embodiment of the present invention, as well as the first fuel cooler 310 and the second fuel cooler 320.

(B1) The holding plate member 500 and other components will be described in detail with reference primarily to Figures 8 to 13.

The retaining plate member 500 is a plate member supported by the support member 400 used to attach the radiator 100.

The first fuel cooler 310, together with the oil cooler 200, is held by a holding plate member 500.

In this way, the first fuel cooler 310 on the engine inlet side is fixed together with the oil cooler 200, which is a hydraulic oil cooler, using the fixing bolts 501 of the retaining plate member 500 supported by the support member 400 as a radiator bracket member, so the number of parts is reduced by jointly fastening the bracket fixing bolts.

The second fuel cooler 320 has a vertical cooling pipe section 321, whose pipe length direction is vertical, and a horizontal cooling pipe section 322, whose pipe length direction is horizontal.

In this way, the shape of the second fuel cooler 320 on the engine outlet side is a curved pipe shape that surrounds the first fuel cooler 310 on the engine inlet side, allowing for efficient component placement and stable component retention in the small space inside the engine room.

The second fuel cooler 320 is held by a holding plate member 500 at least at the position of the vertical cooling pipe section 321.

In this way, the retaining plate member 500 that secures the first fuel cooler 310 on the engine inlet side and the oil cooler 200 located behind the first fuel cooler 310 also functions as a second fuel cooler bracket member that secures the second fuel cooler 320 on the engine outlet side, which promotes a reduction in the number of parts by jointly fastening the bracket fixing bolts.

(B2) The first fuel pipe member 810 and the second fuel pipe member 820 will be specifically described with reference primarily to Figures 14 to 17.

The base plate member 600 is a plate member disposed below the first fuel cooler 310 and the second fuel cooler 320.

The wall plate member 700 is a plate member having a left wall plate portion 710 disposed on the left side of the vehicle body 10, and a right wall plate portion 720 disposed on the right side of the vehicle body 10.

A hole 601 is provided in the base plate member 600 for pulling the first fuel pipe member 810 connected to the first fuel cooler 310 and the second fuel pipe member 820 connected to the second fuel cooler 320 to the underside of the base plate member 600 between the left wall plate portion 710 and the right wall plate portion 720.

The fuel hose is routed below the base plate member 600 by utilizing the holes 601 provided in the base plate member 600 on which the support member 400 serving as the radiator bracket member is erected, so that the temperature rise of the fuel cooled by the first fuel cooler 310 or the second fuel cooler 320 is suppressed when the fuel is pulled out from the inside of the engine room, where the temperature is high.

The first fuel pipe member 810 and the second fuel pipe member 820 are routed through four holes 601 provided in the base plate member 600, and the hoses are connected at positions near the holes 601, making assembly easy.

The first fuel pipe member 810 and the second fuel pipe member 820 are isolated from the engine 30 above the base plate member 600 by the radiator 100, and are isolated from the engine 30 below the base plate member 600 by the crank pulley cover 910.

The fuel hose is routed below the base plate member 600 above the power steering member 940, utilizing the axle bracket space between the left wall plate portion 710 and the right wall plate portion 720 of the wall plate member 700 as the axle bracket member.

The wall plate member 700 is provided with holes 721 for pulling the first fuel pipe member 810 and the second fuel pipe member 820 connected to the engine 30 outward from the wall plate member 700 in the left-right direction of the vehicle body.

The engine 30 is positioned between the left wall plate portion 710 and the right wall plate portion 720.

The fuel hose is routed below the base plate member 600 by utilizing the hole 721 provided in the right wall plate portion 720, which is the right side frame of the axle bracket, so that the temperature rise of the fuel cooled by the first fuel cooler 310 is suppressed when it is pulled out from the inside of the engine room, where the temperature is high.

By using the crank pulley cover 910, which is an inner plate of the axle bracket, interference of the fuel hose with driving components such as the crank pulley and fan belt inside the axle bracket is suppressed.

The crank pulley cover 910 is a multi-function plate that not only prevents fuel hose interference when routing the fuel hose inside the axle bracket, but also prevents the engine fan air from circulating through the axle bracket space to the radiator 100, helping to reduce the number of parts.

The hole 721 through which the first fuel pipe member 810 that runs from the fuel tank 32 to the first fuel cooler 310 via the fuel filter, the first fuel pipe member 810 that runs from the first fuel cooler 310 to the inlet of the engine 30, and the second fuel pipe member 820 that runs from the outlet of the engine 30 to the second fuel cooler 320 are inserted is a single long hole provided in the right side frame of the axle bracket that allows these three hoses to be routed together, thereby realizing stable hose routing.

The first fuel pipe member 810, which is pulled out to the outside of the wall plate member 700, and the second fuel pipe member 820, which is pulled out to the outside of the wall plate member 700 and connected to the engine 30, are routed through the inside of the cooling water drain hose 920 with respect to the left-right direction of the vehicle body.

The first fuel pipe member 810 extending from the fuel tank 32 to the first fuel cooler 310, the first fuel pipe member 810 extending from the first fuel cooler 310 to the inlet of the engine 30, and the second fuel pipe member 820 extending from the outlet of the engine 30 to the second fuel cooler 320 are routed through the space between a cooling water drain hose 920, such as the drain hose of the radiator 100, and the outer wall surface of the right wall plate portion 720, which is the outer surface of the right side of the axle bracket, thereby realizing stable hose routing in the components of this machine.

The first fuel pipe member 810 extending from the fuel tank 32 to the first fuel cooler 310, the first fuel pipe member 810 extending from the first fuel cooler 310 to the inlet of the engine 30, and the second fuel pipe member 820 extending from the outlet of the engine 30 to the second fuel cooler 320 are routed through the space between the hydraulic piping member 930 and the outer wall surface of the right wall plate portion 720, thereby achieving further stabilization of the hose routing in the machine components.

(C) Next, the configuration and operation of the agricultural tractor of this embodiment will be explained in more detail, mainly with reference to Figures 18 to 21.

Here, Figures 18 to 21 are partial perspective views (parts 17 to 20) of the oil cooler 200 of an agricultural tractor according to an embodiment of the present invention, as well as the first fuel cooler 310 and the second fuel cooler 320.

A hole 711 is provided in the wall plate member 700 for pulling the second fuel pipe member 820 connected to the fuel tank 32 outward from the wall plate member 700 in the left-right direction of the vehicle body.

The fuel hose is routed below the base plate member 600 by utilizing the hole 711 provided in the left wall plate portion 710, which is the left side frame of the axle bracket, so that the temperature rise of the fuel cooled by the second fuel cooler 320 is suppressed when it is pulled out from the inside of the engine room, where the temperature is high.

The hole 711 through which the second fuel pipe member 820 extending from the second fuel cooler 320 to the fuel tank 32 and the two hoses (not shown) connected to the power steering cylinder are inserted is a single long hole provided in the left side frame of the axle bracket that allows these three hoses to be routed together, realizing stable hose routing.

The shape of hole 711 is similar to the shape of hole 721, which promotes design simplification.

In the second fuel pipe member 820 that is routed from the second fuel cooler 320 to the fuel tank 32 through the hole 601 provided in the base plate member 600, not only is a hose connection performed in a position near the hole 601 as described above, but the second fuel pipe member 820 that is routed through the hole 601 is returned to the fuel tank 32 after being inserted through the hole 711, thereby realizing easy assembly.

Furthermore, the second fuel pipe member 820, which is pulled out to the outside of the left wall plate portion 710 through the hole 711, passes through the inside of the stay member 950 and is firmly held by the left wall plate portion 710, which can also support hoses such as a hydraulic oil cooler hose and two power steering hoses, thereby realizing stable hose routing.

It is also desirable to have a configuration in which further hose connections, such as the second fuel pipe member 820, are made by utilizing the left wall plate portion 710, which is the left side frame of such an axle bracket.

The work vehicle of the present invention can efficiently achieve good cooling function according to the engine environmental performance, etc., and is useful for use in work vehicles such as agricultural tractors.

LIST OF SYMBOLS 10 Vehicle body 20 Driving unit 21 Floor 22 Driver's seat 23 Steering wheel 24 Accelerator pedal 30 Engine 31 Bonnet 32 Fuel tank 33 Battery 40 Front wheels 50 Rear wheels 60 Work machine lifting mechanism 61 Top link 62 Lower link 100 Radiator 200 Oil cooler 310 First fuel cooler 320 Second fuel cooler 321 Vertical cooling pipe section 322 Horizontal cooling pipe section 400 Support member 500 Holding plate member 501 Fixing bolt device 600 Base plate member 601 Hole 700 Wall plate member 710 Left wall plate portion 711 Hole 720 Right wall plate portion 721 Hole 810 First fuel pipe member 820 Second fuel pipe member 910 Crank pulley cover 920 Cooling water drain hose 930 Hydraulic piping member 940 Power steering member 950 Stay member

Claims (1)

A radiator that cools an engine attached to a vehicle body that uses fuel to generate power;
an oil cooler disposed in front of the radiator;
a first fuel cooler for cooling the fuel entering the engine side;
a second fuel cooler for cooling the fuel exiting the engine side;
a base plate member disposed below the first fuel cooler and the second fuel cooler;
a wall plate member having a left wall plate portion disposed on a left side of the vehicle body and a right wall plate portion disposed on a right side of the vehicle body;
It is equipped with
At least a portion of the first fuel cooler is disposed forward of the oil cooler,
At least a portion of the second fuel cooler is disposed above the oil cooler,
a hole is provided in the base plate member for introducing a first fuel pipe member connected to the first fuel cooler and a second fuel pipe member connected to the second fuel cooler to a lower side of the base plate member between the left wall plate portion and the right wall plate portion;
the first fuel pipe member and the second fuel pipe member are isolated from the engine by the radiator above the base plate member, and are isolated from the engine by a crank pulley cover below the base plate member,
the wall plate member is provided with holes for drawing the first fuel pipe member and the second fuel pipe member connected to the engine outward from the wall plate member with respect to a vehicle body left-right direction;
the engine is disposed between the left wall plate portion and the right wall plate portion,
the first fuel pipe member drawn to the outside of the wall plate member, and the second fuel pipe member drawn to the outside of the wall plate member and connected to the engine, are routed through an inside of a cooling water drain hose with respect to the left-right direction of the vehicle body as a reference.