Specially equipped vehicle

Abstract

To provide a specially equipped vehicle in which the rotation speed of a driving source for travel can be easily adjusted.SOLUTION: The present invention comprises a work device to which the rotational power of a driving source for travel is transmitted, a control unit capable of controlling the rotation speed of the driving source for travel, and a rotation speed increase / decrease switch connected to the control unit. The control unit: when an increase operation is performed on the rotation speed increase / decrease switch to increase the rotation speed of the driving source for travel, controls the rotation speed of the driving source for travel so that the rotation speed of the driving source for travel increases by a predetermined increment from the rotation speed at the time of the increase operation; when a decrease operation is performed on the rotation speed increase / decrease switch to decrease the rotation speed of the driving source for travel, controls the rotation speed of the driving source for travel decreases by a predetermined decrement from the rotation speed at the time of the decrease operation; and when a specific operation different from the increase operation and decrease operation is performed on the rotation speed increase / decrease switch, controls the rotation speed of the driving source for travel to a predetermined specified rotation speed.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a specially equipped vehicle that includes a driving source for traveling and a working device that operates when the driving force of the driving source for traveling is transmitted thereto. [Background technology]

[0002] BACKGROUND ART Specially equipped vehicles (powder transport vehicles) that include a driving source for traveling and a working device that operates when the driving force of the driving source for traveling is transmitted thereto have been known (see Patent Document 1).

[0003] This specially equipped vehicle is equipped with an engine as a driving source and a compressor as a working device. The compressor receives rotational power from the engine and introduces pressurized air through an inlet pipe into a tank containing powder and granular material. This causes the powder and granular material in the tank to flow and is discharged to the outside through a discharge pipe.

[0004] In addition, the specially equipped vehicle has a rotation speed adjustment switch, and operating this rotation speed adjustment switch increases or decreases the engine rotation speed, thereby adjusting the rotation speed of the compressor and the flow rate of pressurized air introduced into the tank.

[0005] The rotation speed adjustment switch is a toggle switch that is biased to return to a neutral position in a horizontal position when not in operation, and is configured as a momentary operation type that is in the ON state only when the operating lever is tilted upward or downward when in operation.

[0006] In the specially equipped vehicle, when the operating lever is tilted upward (increased), the engine speed increases, which in turn increases the compressor speed, thereby increasing the flow rate of compressed air. When the operating lever is tilted downward (decreased), the engine speed decreases, which in turn decreases the compressor speed, thereby decreasing the flow rate of compressed air. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Japanese Patent Publication No. 2020-2846 Summary of the Invention [Problem to be solved by the invention]

[0008] In the above-mentioned specially equipped vehicle, when the rotation speed adjustment switch is operated to increase, the rotation speed of the driving source (engine) increases slightly by a fixed number of rotations from the rotation speed when the rotation speed adjustment switch was operated, and when the rotation speed adjustment switch is operated to decrease, the rotation speed of the driving source decreases slightly by a fixed number of rotations from the rotation speed when the rotation speed adjustment switch was operated.

[0009] Therefore, when increasing or decreasing the rotation speed of the driving source for driving to the target rotation speed, the increase or decrease operation must be performed repeatedly or continuously, which can be time-consuming and laborious.

[0010] SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a specially equipped vehicle in which the rotational speed of the drive source for running can be easily adjusted. [Means for solving the problem]

[0011] The specially equipped vehicle of the present invention is A driving source for traveling; a working device that is actuated by the transmission of rotational power from the driving source for traveling, and whose output changes depending on an increase or decrease in the rotation speed of the driving source for traveling; a control unit capable of controlling the rotation speed of the driving source for traveling; a rotation speed increase switch and a rotation speed decrease switch, or a rotation speed increase / decrease switch, connected to the control unit; The control unit when an increase operation is performed on the rotation speed increase switch or the rotation speed increase / decrease switch to increase the rotation speed of the driving source for traveling, the rotation speed of the driving source for traveling is controlled to increase by a preset increment from the rotation speed at the time of the increase operation, when a reduction operation to reduce the rotation speed of the driving source for traveling is performed on the rotation speed reduction switch or the rotation speed increase / decrease switch, the rotation speed of the driving source for traveling is controlled to be reduced by a preset amount from the rotation speed at the time of the reduction operation, When a specific operation different from the increase operation and the decrease operation is performed on at least one of the rotation speed increase switch and the rotation speed decrease switch, or on the rotation speed increase / decrease switch, the rotation speed of the driving source for traveling is controlled to become a predetermined designated rotation speed.

[0012] With this configuration, when the target rotation speed is the designated rotation speed, simply performing a specific operation will set the rotation speed of the driving source for driving to the target rotation speed, making it easy to adjust the rotation speed of the driving source for driving. Furthermore, when the target rotation speed is close to the designated rotation speed, a specific operation can be performed to set the rotation speed of the driving source for driving to the designated rotation speed (i.e., after increasing or decreasing the rotation speed of the driving source for driving to close to the target rotation speed), and then the rotation speed of the driving source for driving to reach the target rotation speed by performing an increasing or decreasing operation. This reduces the number of operations compared to when the rotation speed of the driving source for driving to reach the target rotation speed by simply performing an increasing or decreasing operation, making it easy to adjust the rotation speed of the driving source for driving.

[0013] In the specially equipped vehicle, the designated rotation speed includes a predetermined first rotation speed and a second rotation speed greater than the first rotation speed, The control unit When the specific operation is performed, When the rotation speed of the driving source for traveling during the specific operation is smaller than the first rotation speed, the rotation speed of the driving source for traveling is controlled to be the first rotation speed; When the rotation speed of the drive source for traveling during the specific operation is equal to or greater than the first rotation speed, the rotation speed of the drive source for traveling may be controlled to be the second rotation speed.

[0014] According to this configuration, the number of operations required to increase the rotation speed of the driving source for traveling to the first rotation speed or the second rotation speed can be reduced.

[0015] in this case, the specific operation includes a specific increase operation and a specific decrease operation, the specified rotation speed includes a third rotation speed that is smaller than the first rotation speed, The control unit When the specific increase operation is performed, When the rotation speed of the driving source for traveling during the specific increasing operation is smaller than the first rotation speed, the rotation speed of the driving source for traveling is controlled to be the first rotation speed, When the rotation speed of the driving source for traveling during the specific increasing operation is equal to or greater than the first rotation speed, the rotation speed of the driving source for traveling is controlled to be equal to the second rotation speed, When the specific reduction operation is performed, When the rotation speed of the driving source for traveling during the specific reduction operation is greater than the first rotation speed, the rotation speed of the driving source for traveling is controlled to be the first rotation speed, When the rotation speed of the driving source for traveling during the specific reduced operation is equal to or lower than the first rotation speed, the rotation speed of the driving source for traveling may be controlled to be the third rotation speed.

[0016] According to this configuration, the number of operations required to increase or decrease the rotation speed of the driving source for traveling to the first rotation speed, the second rotation speed, or the third rotation speed can be reduced.

[0017] In addition, in the specially equipped vehicle, the specific operation is at least one of the rotation speed increase switch and the rotation speed decrease switch, or a long operation of the rotation speed increase / decrease switch, The long operation may be an operation having a longer operation time than the increase operation and the decrease operation.

[0018] With this configuration, the rotation speed of the driving source for traveling can be set to the designated rotation speed simply by operating at least one of the rotation speed increase switch and the rotation speed decrease switch, or by operating the rotation speed increase / decrease switch for a long period of time. [Effects of the Invention]

[0019] As described above, according to the present invention, a specially equipped vehicle can be provided in which the rotation speed of the drive source for running can be easily adjusted. [Brief explanation of the drawings]

[0020] [Figure 1] FIG. 1 is a block diagram showing the configuration of a specially equipped vehicle according to this embodiment. [Figure 2] FIG. 2 is a diagram for explaining a controller provided in the specially equipped vehicle. [Figure 3] FIG. 3 is a schematic diagram showing an electrical system connecting the controller and the engine in the specially equipped vehicle. [Figure 4] FIG. 4 is a diagram showing an example of a change in engine speed due to an increase operation on the speed increase / decrease switch. [Figure 5] FIG. 5 is a diagram showing an example of a change in the engine speed due to a decrease operation of the speed increase / decrease switch. [Figure 6] FIG. 6 is a diagram showing an example of a change in engine speed due to a specific increase operation on the speed increase / decrease switch. [Figure 7] FIG. 7 is a diagram showing an example of a change in engine speed due to a specific decrease operation on the speed increase / decrease switch. DETAILED DESCRIPTION OF THE INVENTION

[0021] Hereinafter, one embodiment of the present invention will be described with reference to FIGS.

[0022] As shown in Figures 1 and 2, the specially equipped vehicle 1 of this embodiment is equipped with a driving source 2 for traveling, a working device 3 that is activated by the transmission of driving force from the driving source 2 and whose output changes depending on whether the rotation speed of the driving source 2 is increased or decreased, a control unit 45 that can control the rotation speed of the driving source 2 for traveling, and a rotation speed increase / decrease switch 42 connected to the control unit 45.

[0023] The specially equipped vehicle 1 of this embodiment is, for example, a powder / granular material transport vehicle that transports powder / granular material, and the driving source 2 for traveling in this powder / granular material transport vehicle 1 is an engine, and the working device 3 is a compressor that introduces pressurized air through an introduction pipe into a tank that stores powder / granular material. This powder / granular material transport vehicle (specially equipped vehicle) travels using the rotational power of the engine 2, and the rotational power of the engine 2 can be transmitted to the working device 3 by switching the destination of the rotational power of the engine 2 to the working device 3. The rotational speed of the engine 2 is the rotational speed of a crankshaft (drive shaft) exposed from a housing of the engine 2.

[0024] Specifically, in this powder and granular material transport vehicle 1, a PTO switch (not shown) is located inside the cab, and by operating this PTO switch, the vehicle is switched between a state in which the rotational power of the engine 2 is used to drive the compressor 3 (ON state) and a state in which the rotational power of the engine 2 is used to drive the vehicle (OFF state).

[0025] More specifically, the PTO switch is an alternate operation switch that, when turned ON, switches the transmission destination of the rotational driving force of the engine 2 to a working state (ON state) in which the compressor 3 is used, and maintains that state until the next operation (the PTO switch is turned OFF).Furthermore, when turned OFF, the PTO switch switches the transmission destination of the rotational driving force of the engine 2 to a running state (OFF state) in which the vehicle runs, and maintains that state until the next operation (the PTO switch is turned ON).

[0026] In addition, in the powder and granular material transport vehicle (specially equipped vehicle) 1, the compressor (working device) 3 operates by receiving direct mechanical motion from the engine (driving source) 2 when in the above-mentioned ON state, and the flow rate of the compressed air output from the compressor 3 changes as the output value (rotation speed) of the compressor 3 changes.

[0027] In the powder / granular material transport vehicle 1 of this embodiment, the rotational power of the engine 2 is transmitted to the compressor 3 so that the rotational speed of the engine 2 and the rotational speed of the compressor 3 are proportional (1:1 in the example of this embodiment). That is, in this powder / granular material transport vehicle 1, when the rotational power of the engine 2 is transmitted to the compressor 3, the rotational speed of the engine 2 and the rotational speed of the compressor 3 are the same. Therefore, in the powder / granular material transport vehicle 1 of this embodiment, the rotational speed of the compressor 3 can be considered to be the rotational speed of the engine 2.

[0028] 3, the powder / granular material transport vehicle 1 is equipped with a controller 4 capable of operating the compressor 3, and an electrical system 10 connecting the controller 4 and the engine 2. The controller 4 in this embodiment is disposed, for example, on the port side of the powder / granular material transport vehicle 1, and operates the compressor 3 through control of the engine 2 (more specifically, control of the rotation speed). The location where the controller 4 is disposed is not limited, and it may be disposed in the cab, etc.

[0029] The electrical system 10 includes an electronic governor 11 , controller-side wiring 12 that connects the controller 4 and the electronic governor 11 , and drive source-side wiring 13 that connects the electronic governor 11 and the engine 2 .

[0030] The electronic governor 11 is a component for maintaining a constant rotation speed of the engine 2, and adjusts the amount of fuel injection by controlling the fuel injection pump of the engine 2. When the electronic governor 11 receives a command value (voltage value) from the controller 4 via the controller-side wiring 12, it controls the engine 2 so as to maintain the rotation speed corresponding to this command value. Specifically, the electronic governor 11 controls the rotation speed of the engine 2 by supplying fuel to the engine 2 in an amount according to the received command value. In the powdery material transport vehicle 1 of this embodiment, the rotation speed of the engine 2 (i.e., the rotation speed of the compressor 3) is determined by the command value (voltage value) input to the electronic governor 11, and the powdery material transport vehicle 1 is not equipped with a sensor or the like that directly detects (actually measures) the rotation speed of the engine 2 or the compressor 3.

[0031] 2, the controller 4 has a meter panel 40 having a display unit (screen) 44 that displays the rotation speed increase / decrease switch 42 and the rotation speed of the compressor 3, a control unit 45 to which the rotation speed increase / decrease switch 42 is connected, and a housing 46 that houses the control unit 45, and controls (adjusts) the output value (rotation speed) of the compressor 3 through control of the engine 2 (more specifically, rotation speed control). In the controller 4 of this embodiment, when the rotation speed increase / decrease switch 42 is operated, a command value (voltage value) corresponding to the operation is output.

[0032] In the meter panel 40 of this embodiment, a main switch 41, a rotation speed increase / decrease switch 42, and a screen changeover switch 43 are arranged at intervals from top to bottom on the right end of the meter panel 40. The display unit 44 of the meter panel 40 of this embodiment is a liquid crystal screen located in the center of the meter panel 40, and displays a rotation speed display unit 441 of the compressor 3, an internal tank pressure display unit 442 of the tank that accommodates the powdered or granular material, and a piping pressure display unit 443.

[0033] The main switch 41 is a switch that turns on the power to the controller 4. The main switch 41 is configured as a toggle switch, and switches between the power-on state and the power-off state of the controller 4 by tilting the operation lever upward or downward just once. The main switch 41 of this embodiment is an alternate operation type switch that maintains the switched state between the power-on state and the power-off state.

[0034] In this embodiment, when the operating lever is pushed to the upper contact position, the main switch 41 turns on the power to the controller 4 (puts the power on) and maintains that state until the next operation (the operating lever is pushed to the lower contact position) is performed. Also, when the operating lever is pushed to the lower contact position, the main switch 41 turns off the power to the controller 4 (puts the power off) and maintains that state until the next operation (the operating lever is pushed to the upper contact position).

[0035] The rotation speed increase / decrease switch 42 is a switch that adjusts the rotation speed (output value) of the compressor 3 by adjusting the rotation speed (drive value) of the engine 2, and is a switch that is used during normal use of the compressor 3 (i.e., use when there is no emergency). The rotation speed increase / decrease switch 42 is configured as a toggle switch, and is biased so that the operation lever returns to a neutral position where the operation lever is horizontal when the operation lever is not being operated (when no force is being applied to the operation lever by an operator, etc.), and is a momentary operation switch that tilts the operation lever to the upper contact position or the lower contact position when the operation lever is operated.

[0036] In the rotation speed increase / decrease switch 42 of this embodiment, when the operating lever is pushed to the upper contact position, the controller 4 increases and outputs a command value (voltage value), and the rotation speed of the engine 2 increases in accordance with the increase in this command value. Then, the rotation speed of the compressor 3 increases in accordance with this increase in the rotation speed of the engine 2. On the other hand, when the operating lever is pushed to the lower contact position, the controller 4 decreases and outputs a command value (voltage value), and the rotation speed of the engine 2 decreases in accordance with this decrease in the command value. Then, the rotation speed of the compressor 3 decreases in accordance with this decrease in the rotation speed of the engine 2.

[0037] The screen changeover switch 43 is a momentary-operation switch configured as a toggle switch, which is biased so that the operating lever returns to a neutral position where it is horizontal when the operating lever is not operated, and is tilted to an upper contact position or a lower contact position when the operating lever is operated.

[0038] In the screen changeover switch 43 of this embodiment, when the operating lever is pushed to the upper contact position, the screen of the display unit 44 is switched, and for example, the meter screen 44A shown in Fig. 2 is displayed. In addition, when the operating lever is pushed to the lower contact position and this pushed state is maintained (pressed and held) for a predetermined time (several seconds), the value of the trip meter (odometer) is reset.

[0039] On the meter screen 44A, the rotation speed of the compressor 3 (the rotation speed converted from the command value output from the controller 4: 850 rpm in the example shown in FIG. 2) is displayed as a rotation speed display section 441, and the measurement value of the pressure gauge in the tank (0.150 MPa in the example shown in FIG. 2) and the measurement value of the pressure gauge in the piping (0.175 MPa in the example shown in FIG. 2) are displayed as a tank pressure display section 442 and a piping pressure display section 443.

[0040] In addition, the display unit 44 can also be switched to an operation information screen, etc., which displays the total operating time of the compressor 3, the operating time of the compressor 3 today, the temperature of the compressor 3, error indications, error history, etc.

[0041] The control unit 45 is configured by a microcomputer or the like arranged (built-in) in a housing 46 of the controller 4, and outputs a control signal based on the operation of each switch 41, 42, 43. This control unit 45 controls (adjusts) the rotation speed of the compressor 3, for example, by controlling the rotation speed of the engine 2.

[0042] Specifically, when an operation (increase operation) is performed on the rotation speed increase / decrease switch 42 to increase the rotation speed of the engine 2, and therefore the compressor 3, the control unit 45 outputs a command value (voltage value) to increase the rotation speed of the compressor 3 by a preset increment (10 rpm in this embodiment) from the rotation speed at the time of the increase operation (more specifically, the rotation speed when the control lever reaches the contact position on the increase operation side (when the increase operation starts)). Here, the increase operation of the rotation speed increase / decrease switch 42 refers to a short operation in which the control lever of the rotation speed increase / decrease switch 42 is pushed once to the upper contact position and then immediately returned to the neutral position by a biasing force (the time during which the control lever is maintained at the upper contact position). Note that in the powder / granular material transport vehicle 1 of this embodiment, the rotation speed of the compressor 3 (i.e., the engine 2) is converted by the control unit 45 from the command value (voltage value) output from the control unit 45.

[0043] In the powder / granular material transport vehicle 1 of this embodiment, when the rotation speed increase / decrease switch 42 is operated to increase the rotation speed of the engine 2, the rotation speed increases by 10 rpm from the rotation speed at the time of the increase operation. At this time, the control unit 45 outputs a voltage value (increased voltage value) that is increased by 10 rpm from the voltage value at the time of the increase operation. Furthermore, because the rotational power of the engine 2 is transmitted to the compressor 3 so that the rotation speed of the engine 2 and the rotation speed of the compressor 3 are 1:1, the rotation speed of the compressor 3 also increases by 10 rpm from the rotation speed at the time of the increase operation. Note that the rotation speed of the compressor 3 after this increase is the same as the rotation speed of the engine 2 whose rotation speed has increased after the increase operation.

[0044] As a result, for example, if the rotation speed increase / decrease switch 42 is operated multiple times at intervals, the rotation speed of the compressor 3 increases by 10 rpm for each increase operation, i.e., the rotation speed of the compressor 3 increases in a step-like manner (see Figure 4: in the example shown in Figure 4, two increase operations are performed).

[0045] Furthermore, when an operation to decrease the rotation speed of the engine 2 (decrease operation) is performed on the rotation speed increase / decrease switch 42, the control unit 45 outputs a command value (voltage value) such that the rotation speed of the compressor 3 is decreased by a preset amount (10 rpm in the example of this embodiment) from the rotation speed at the time of the decrease operation (more specifically, the rotation speed when the control lever reaches the contact position on the decrease operation side (when the decrease operation starts)). Here, the decrease operation of the rotation speed increase / decrease switch 42 refers to a short operation in which the control lever of the rotation speed increase / decrease switch 42 is pushed down once to the lower contact position, and then immediately returned to the neutral position by the biasing force (the time during which the control lever is maintained at the lower contact position).

[0046] In the powder / granular material transport vehicle 1 of this embodiment, when the rotation speed increase / decrease switch 42 is operated to decrease the rotation speed of the engine 2, the rotation speed is decreased by 10 rpm from the rotation speed at the time of the decrease operation. At this time, the control unit 45 outputs a voltage value (voltage value after decrease) that is a voltage value that is decreased by 10 rpm from the voltage value at the time of the decrease operation. Also, as described above, since the rotational power of the engine 2 is transmitted to the compressor 3 so that the rotation speed of the engine 2 and the rotation speed of the compressor 3 are 1:1, the rotation speed of the compressor 3 also decreases by 10 rpm from the rotation speed at the time of the decrease operation. Note that the rotation speed of the compressor 3 after this decrease is the same as the rotation speed of the engine 2 whose rotation speed has decreased after the decrease operation.

[0047] As a result, for example, if the rotation speed increase / decrease switch 42 is operated to decrease the rotation speed multiple times at intervals, the rotation speed of the engine 2 will decrease by 10 rpm for each decrease operation, i.e., the rotation speed of the compressor 3 will decrease in steps (see Figure 5: in the example shown in Figure 5, two decrease operations are performed).

[0048] Furthermore, when a specific operation different from the above-described increase operation and decrease operation is performed, the control unit 45 outputs a specified command value, which is a command value (voltage value) to the rotation speed increase / decrease switch 42 so that the rotation speed of the compressor 3 becomes a preset specified rotation speed. That is, the controller 4 outputs a specified command value (a command (direct command) to make the compressor 3 become the specified rotation speed) to the electronic governor 11 via the controller-side wiring 12. Here, the specific operation of the rotation speed increase / decrease switch 42 is a long operation of the rotation speed increase / decrease switch 42, and this long operation is an operation that takes a longer time than the increase operation and the decrease operation. The specific operation in this embodiment includes a specific increase operation and a specific decrease operation, and the specific increase operation takes a longer time than the increase operation, and the specific decrease operation takes a longer time than the decrease operation.

[0049] Specifically, the above-mentioned increase operation is an operation in which the control lever of the rotation speed increase / decrease switch 42 is pushed to the upper contact position and then immediately returned to the neutral position (moved away from the contact position), whereas the specific increase operation is an operation in which the control lever of the rotation speed increase / decrease switch 42 is pushed to the upper contact position and this pushed state is maintained for several seconds (e.g., 1 second) or more. Also, the above-mentioned decrease operation is an operation in which the control lever of the rotation speed increase / decrease switch 42 is pushed to the lower contact position and then immediately returned to the neutral position (moved away from the contact position), whereas the specific decrease operation is an operation in which the control lever of the rotation speed increase / decrease switch 42 is pushed to the lower contact position and this pushed state is maintained for several seconds (e.g., 1 second) or more. Note that in the specific operation of this embodiment, the time required to maintain the control lever at the contact position is the same for the specific increase operation and the specific decrease operation, but may be different.

[0050] When the specific increase or decrease operation described above is performed on the rotation speed increase / decrease switch 42, the control unit 45 outputs a specified command value such that the rotation speed of the engine 2 (i.e., the compressor 3) becomes the specified rotation speed. The specified rotation speed in this embodiment includes a first rotation speed (e.g., 720 rpm) and a second rotation speed (e.g., 850 rpm) that is greater than the first rotation speed. The specified rotation speed in this embodiment also includes a third rotation speed (e.g., 600 rpm) that is less than the first rotation speed. In the powder / granular material transport vehicle 1 of this embodiment, the minimum rotation speed of the engine 2 during normal operation of the compressor 3 is the third rotation speed (600 rpm), and the maximum rotation speed is the second rotation speed (850 rpm). In this embodiment, the difference between the second rotation speed and the first rotation speed is greater than the increase or decrease in the rotation speed of the engine 2 due to the increase or decrease operation. The difference between the first rotation speed and the third rotation speed is also greater than the increase or decrease in the rotation speed of the engine 2 due to the increase or decrease operation.

[0051] When the specific increasing operation is performed, if the rotation speed of the engine 2 (i.e., the compressor 3) (the rotation speed of the engine 2 at the specific increasing operation) is lower than the first rotation speed, the control unit 45 outputs a specified command value (first command value) such that the rotation speed of the engine 2 becomes the first rotation speed. Furthermore, when the specific increasing operation is performed, if the rotation speed of the engine 2 (the rotation speed of the engine 2 at the specific increasing operation) is equal to or higher than the first rotation speed, the control unit 45 outputs a specified command value (second command value) such that the rotation speed of the engine 2 becomes the second rotation speed. For example, if the specific increasing operation is performed twice with an interval between them on the rotation speed increase / decrease switch 42 when the rotation speed of the engine 2 is at the third rotation speed (600 rpm), the rotation speed of the engine 2 (i.e., the compressor 3) increases sequentially from the first rotation speed (720 rpm) to the second rotation speed (850 rpm) with each specific increasing operation (see FIG. 6 ). The above-mentioned “rotation speed of the engine 2 at the specific increasing operation” is, more specifically, the rotation speed of the engine 2 at the start of the specific increasing operation.

[0052] On the other hand, when the rotation speed of the engine 2 (i.e., the compressor 3) (the rotation speed of the engine 2 during the specific rotation speed reduction operation) is greater than the first rotation speed when the specific rotation speed reduction operation is performed, the control unit 45 outputs a first command value such that the rotation speed of the engine 2 becomes the first rotation speed. Furthermore, when the rotation speed of the engine 2 (the rotation speed of the engine 2 during the specific rotation speed reduction operation) is equal to or less than the first rotation speed when the specific rotation speed reduction operation is performed, the control unit 45 outputs a designated command value (third command value) such that the rotation speed of the engine 2 becomes a third rotation speed. For example, if the specific rotation speed reduction operation is performed twice with an interval between them on the rotation speed increase / decrease switch 42 when the rotation speed of the engine 2 is the second rotation speed (850 rpm), the rotation speed of the engine 2 (i.e., the compressor 3) decreases sequentially to the first rotation speed (720 rpm) and the third rotation speed (600 rpm) with each specific rotation speed reduction operation (see FIG. 7 ). The above-mentioned “rotation speed of the engine 2 during the specific rotation speed reduction operation” is, more specifically, the rotation speed of the engine 2 at the start of the specific rotation speed reduction operation.

[0053] The specific increase operation and the specific decrease operation are stored in the control unit 45 separately from the increase operation and the decrease operation. When the specific increase operation or the specific decrease operation is performed, the control unit 45 outputs a specific rotation speed (absolute value). This specific rotation speed is an independent value that is not related to the value corresponding to the increase (10 rpm) or decrease (10 rpm) of the rotation speed at the time of the increase operation or the decrease operation. On the other hand, in the increase operation and the decrease operation, the control unit 45 adds or subtracts the stored increase (10 rpm) or decrease (10 rpm) to or from the rotation speed at the time of the operation, and outputs the calculated value. The calculated value is an independent value that is not related to the specific rotation speed.

[0054] When the rotation speed increase / decrease switch 42 is operated in this manner, signals are transmitted and received in the electrical system 10 connecting the engine 2 and the controller 4 as follows.

[0055] For example, when the rotation speed increase / decrease switch 42 of the controller 4 is operated to increase the rotation speed of the engine 2 by a preset increment (10 rpm in the example of this embodiment), the control unit 45 outputs a command value (voltage value) to increase the rotation speed of the engine 2 by a preset increment (10 rpm in the example of this embodiment). Subsequently, when the command value is input to the electronic governor 11 via the controller-side wiring 12, the electronic governor 11 controls the rotation speed of the engine 2 to become the rotation speed converted from the input command value (i.e., controls the amount of fuel injected by the fuel injection pump to become the rotation speed converted from the command value).

[0056] As described above, in the powder / granular material transport vehicle 1 of this embodiment, the rotation speed of the engine 2 is controlled (adjusted) to be equal to the rotation speed converted from the command value (voltage value) input to the electronic governor 11. That is, the rotation speed of the engine 2 is not directly detected (actually measured) by a sensor or the like, and the rotation speed of the engine 2 is adjusted based on this detection result to maintain that rotation speed (feedback control, etc.). Specifically, in the powder / granular material transport vehicle 1 of this embodiment, the rotation speed of the engine 2 (i.e., the rotation speed of the compressor 3) is controlled (adjusted) by the electronic governor 11 adjusting the amount of fuel supplied (fuel injection amount) to the engine 2 so that the injection amount is such that the rotation speed converted from the command value (voltage value) input to the electronic governor 11 is maintained. That is, the electronic governor 11 maintains the rotation speed of the engine 2 at the rotation speed converted from the input command value (voltage value).

[0057] The powder and granular material transport vehicle (specially equipped vehicle) 1 described above includes an engine (driving source) 2, a compressor (working device) 3 that is operated by transmission of rotational power from the engine 2 and whose flow rate (output) of compressed air changes depending on whether the rotation speed of the engine 2 is increased or decreased, a control unit 45 that can control the rotation speed of the engine 2, and a rotation speed increase / decrease switch 42 connected to the control unit 45. When an increase operation is performed on the rotation speed increase / decrease switch 42 to increase the rotation speed of the engine 2, the control unit 45 outputs a command value (voltage value) such that the rotation speed of the engine 2 increases by a preset increment (10 rpm in this embodiment) from the rotation speed at the time of the increase operation, and when a decrease operation is performed on the rotation speed increase / decrease switch 42 to decrease the rotation speed of the engine 2, the control unit 45 outputs a command value (voltage value) such that the rotation speed of the engine 2 decreases by a preset decrement (10 rpm in this embodiment) from the rotation speed at the time of the decrease operation. In addition, when a specific operation other than the increase operation and decrease operation is performed on the rotation speed increase / decrease switch 42, the control unit 45 outputs a specified command value, which is a command value (voltage value) that causes the rotation speed of the engine 2 to become a predetermined specified rotation speed.

[0058] According to this powder / granular material transport vehicle 1, when the target rotation speed of the engine 2 is a designated rotation speed, the rotation speed of the engine 2 can be set to the target rotation speed simply by performing a specific operation, thereby facilitating adjustment of the rotation speed of the engine 2 (more specifically, adjustment of the rotation speed of the compressor 3 via control of the rotation speed of the engine 2). Also, when the target rotation speed is close to the designated rotation speed, the rotation speed of the engine 2 can be set to the designated rotation speed by performing a specific operation (i.e., after increasing or decreasing the rotation speed of the engine 2 to close to the target rotation speed), and then the rotation speed of the engine 2 can be set to the target rotation speed by performing an increasing or decreasing operation one or more times. This reduces the number of operations compared to when the rotation speed of the engine 2 is set to the target rotation speed only by an increasing or decreasing operation, thereby facilitating adjustment of the rotation speed of the engine 2 (more specifically, adjustment of the rotation speed of the compressor 3 via control of the rotation speed of the engine 2). In other words, in the powder and granular material transport vehicle 1 of this embodiment, the rotation speed increase / decrease switch 42 is a momentary operation switch rather than a volume switch or an alternate operation switch, thereby making it easier to adjust the rotation speed of the engine 2, i.e., by performing increase and decrease operations.

[0059] Furthermore, in the powder / granular material transport vehicle 1 of this embodiment, the designated rotation speed includes a predetermined first rotation speed (720 rpm in this embodiment) and a second rotation speed (850 rpm in this embodiment) that is greater than the first rotation speed. When a specific operation (more specifically, a specific increase operation) is performed, if the rotation speed of the engine (traveling drive source) 2 during the specific operation is lower than the first rotation speed, the control unit 45 outputs a first command value such that the rotation speed of the engine 2 becomes the first rotation speed, and if the rotation speed of the engine 2 during the specific operation is equal to or greater than the first rotation speed, the control unit 45 outputs a second command value such that the rotation speed of the engine 2 becomes the second rotation speed.

[0060] More specifically, the specific operation includes a specific increase operation and a specific decrease operation, and the designated rotation speed also includes a third rotation speed (600 rpm in the example of this embodiment) lower than the first rotation speed. When a specific increase operation is performed, if the rotation speed of the engine (driving source for travel) 2 at the time of the specific increase operation is lower than the first rotation speed, the control unit 45 outputs a first command value such that the rotation speed of the engine 2 becomes the first rotation speed. When the rotation speed of the engine 2 at the time of the specific increase operation is equal to or higher than the first rotation speed, the control unit 45 outputs a second command value such that the rotation speed of the engine 2 becomes the second rotation speed. When a specific decrease operation is performed, if the rotation speed of the engine 2 at the time of the specific decrease operation is higher than the first rotation speed, the control unit 45 outputs a first command value such that the rotation speed of the engine 2 becomes the first rotation speed. When the rotation speed of the engine 2 at the time of the specific decrease operation is equal to or lower than the first rotation speed, the control unit 45 outputs a third command value such that the rotation speed of the engine 2 becomes the third rotation speed. Thus, according to the powder / granular material transport vehicle 1 of this embodiment, the number of operations required to increase or decrease the rotation speed of the engine 2 to the first rotation speed, the second rotation speed, or the third rotation speed is reduced.

[0061] In the powder / granular material transport vehicle 1 of this embodiment, the specific operation is a long operation of the rotation speed increase / decrease switch 42, which takes a longer time than the increase operation and decrease operation. As a result, even if the rotation speed of the engine 2 is far from the designated rotation speed, a single long operation of the rotation speed increase / decrease switch 42 can bring the rotation speed of the engine 2 to the designated rotation speed.

[0062] The specially equipped vehicle of the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention. For example, the configuration of one embodiment can be added to the configuration of another embodiment, or part of the configuration of one embodiment can be replaced with the configuration of another embodiment. Furthermore, part of the configuration of one embodiment can be deleted.

[0063] The specially equipped vehicle 1 in the above embodiment is a powder transport vehicle, but is not limited to this configuration. The specially equipped vehicle 1 may also be a tank truck, a concrete pump truck, a refuse truck, or the like. In other words, the specially equipped vehicle 1 may be a vehicle that receives rotational power from a driving source 2 for traveling and is equipped with a working device 3 whose own rotation speed is controlled by controlling the rotation speed of the driving source for traveling. In this case, the working device 3 may be a hydraulic pump (a pump that sends oil to a cylinder, etc.) or a generator. In other words, the working device 3 may be one whose output changes depending on whether the rotation speed of the driving source 2 for traveling is increased or decreased.

[0064] In the specially equipped vehicle 1 of the above embodiment, the driving source 2 for traveling is an internal combustion engine such as a reciprocating engine, but is not limited to this configuration. The driving source 2 for traveling may also be an electric motor operated by a battery.

[0065] Furthermore, in the specially equipped vehicle 1 of the above embodiment, the rotation speed increase / decrease switch 42 is a momentary-action toggle switch, but is not limited to this configuration. The switch that controls the rotation speed of the working device 3 may be a momentary-action push switch. In this case, the switch that controls the rotation speed of the working device 3 is composed of a rotation speed increase switch that increases the rotation speed of the working device 3 by a preset increment when pressed, and a rotation speed decrease switch that decreases the rotation speed of the working device 3 by a preset decrement when pressed once. In this configuration, a specific increase operation is, for example, a long press of the rotation speed increase switch, and a specific decrease operation is, for example, a long press of the rotation speed decrease switch.

[0066] The specific increase operation and the specific decrease operation are not limited to a long press (an operation of pressing and holding for a predetermined number of seconds or more). For example, when increasing the rotation speed of the working device 3 to a designated rotation speed, the rotation speed decrease switch may be pressed once (an operation in which the switch is pressed for a shorter period of time than a long press), followed by a long press of the rotation speed increase switch. Furthermore, when decreasing the rotation speed of the working device 3 to a designated rotation speed, the rotation speed increase switch may be pressed once, followed by a long press of the rotation speed decrease switch. That is, the specific operation (the specific increase operation and the specific decrease operation) is a long operation of at least one of the rotation speed increase switch and the rotation speed decrease switch, or the rotation speed increase / decrease switch 42, and this long operation is an operation that takes a longer time than the increase operation and the decrease operation. Here, the long operation is not limited to a single operation of a switch for controlling (adjusting) the rotation speed of the working device 3, but may be a combination of multiple operations. In this case, the operation time may be the total time of the combined operations.

[0067] Furthermore, in the specially equipped vehicle 1 of the above embodiment, the increase (increased rotation speed) by which the rotation speed of the working device 3 increases when the rotation speed increase / decrease switch 42 is operated to increase, and the decrease (decreased rotation speed) by which the rotation speed of the working device 3 decreases when the rotation speed increase / decrease switch 42 is operated to decrease, are the same (in the example of the above embodiment, both are 10 rpm), but they may be different.

[0068] Furthermore, the rotation speed increase switch and the rotation speed decrease switch, or the rotation speed increase / decrease switch 42 may be wirelessly connected to the control unit 45. In this case, the rotation speed of the working device 3 may be controlled by a remote control or a smartphone.

[0069] Furthermore, the rotation speed (specified rotation speed, etc.) of the working device 3 may be controlled based on the actual rotation speed of the traveling drive source 2 and the working device 3 measured by a sensor.

[0070] Furthermore, although the rotation speed of the working device 3 in the above embodiment has a 1:1 relationship with the rotation speed of the traveling drive source 2, the present invention is not limited to this configuration. The rotation speed of the working device 3 may be proportional to the rotation speed of the traveling drive source 2, and may be, for example, n times the rotation speed of the traveling drive source 2 depending on the gear ratio.

[0071] Although the command value in the above embodiment is a voltage value, this is not limiting. The command value may be a current value. Furthermore, the command value may be a signal that outputs a specific value depending on the connected device. [Explanation of symbols]

[0072] 1... Powder transport vehicle (specially equipped vehicle), 2... Engine (driving source), 3... Compressor (working device), 4... Controller, 40... Meter panel, 41... Main switch, 42... Rotation speed increase / decrease switch, 43... Screen changeover switch, 44... Display, 44A... Meter screen, 441... Rotation speed display, 442... Tank pressure display, 443... Pipe pressure display, 45... Control unit, 46... Housing, 10... Electrical system, 11... Electronic governor, 12... Controller side wiring, 13... Drive source side wiring

Claims

1. A driving source for traveling; a working device that is actuated by the transmission of rotational power from the driving source for traveling, and whose output changes depending on an increase or decrease in the rotation speed of the driving source for traveling; a control unit capable of controlling the rotation speed of the driving source for traveling; a rotation speed increase switch and a rotation speed decrease switch, or a rotation speed increase / decrease switch, connected to the control unit; The control unit when an increase operation is performed on the rotation speed increase switch or the rotation speed increase / decrease switch to increase the rotation speed of the driving source for traveling, the rotation speed of the driving source for traveling is controlled to increase by a preset increment from the rotation speed at the time of the increase operation, when a reduction operation to reduce the rotation speed of the driving source for traveling is performed on the rotation speed reduction switch or the rotation speed increase / decrease switch, the rotation speed of the driving source for traveling is controlled to be reduced by a preset amount from the rotation speed at the time of the reduction operation, A specially equipped vehicle that controls the rotation speed of the driving source for traveling to a predetermined designated rotation speed when a specific operation different from the increase operation and the decrease operation is performed on at least one of the rotation speed increase switch and the rotation speed decrease switch, or on the rotation speed increase / decrease switch.

2. the designated rotation speed includes a predetermined first rotation speed and a second rotation speed greater than the first rotation speed, The control unit When the specific operation is performed, When the rotation speed of the driving source for traveling during the specific operation is smaller than the first rotation speed, the rotation speed of the driving source for traveling is controlled to be the first rotation speed; 2. The specially equipped vehicle according to claim 1, wherein when the rotational speed of the driving source for running during the specific operation is equal to or higher than the first rotational speed, the rotational speed of the driving source for running is controlled to be equal to the second rotational speed.

3. the specific operation includes a specific increase operation and a specific decrease operation, the specified rotation speed includes a third rotation speed that is smaller than the first rotation speed, The control unit When the specific increase operation is performed, When the rotation speed of the driving source for traveling during the specific increasing operation is smaller than the first rotation speed, the rotation speed of the driving source for traveling is controlled to be the first rotation speed, When the rotation speed of the driving source for traveling during the specific increasing operation is equal to or greater than the first rotation speed, the rotation speed of the driving source for traveling is controlled to be equal to the second rotation speed, When the specific reduction operation is performed, When the rotation speed of the driving source for traveling during the specific reduction operation is greater than the first rotation speed, the rotation speed of the driving source for traveling is controlled to be the first rotation speed, 3. The specially equipped vehicle according to claim 2, wherein when the rotational speed of the driving source for running during the specific reduced operation is equal to or lower than the first rotational speed, the rotational speed of the driving source for running is controlled to be equal to the third rotational speed.

4. the specific operation is at least one of the rotation speed increase switch and the rotation speed decrease switch, or a long operation of the rotation speed increase / decrease switch, The specially equipped vehicle according to any one of claims 1 to 3, wherein the long operation is an operation having a longer operation time than the increase operation and the decrease operation.

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