JPS623011B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an operation control device for specially equipped vehicles such as garbage collection trucks and mixer trucks.

For example, in some garbage collection vehicles, a garbage processing frame equipped with a garbage loading means is connected to the rear of the garbage storage box on the vehicle frame, and the loading means is driven to push the garbage into the storage box. The loading means utilizes the power of the engine, and is driven while keeping the rotational speed of the engine constant during loading of garbage.

However, the load of garbage acting on the garbage loading means is low at the beginning of loading and increases as it approaches full capacity.On the other hand, the engine speed is set based on high load, so The disadvantage was that the engine speed was higher than necessary under load, wasting fuel.

In view of the above, the present invention provides an information processing device using a microcomputer, inputs a drive device load signal and an engine rotation signal to the information processing device, and adjusts the engine rotation speed in accordance with the work load. The present invention provides an operation control device for a specially equipped vehicle that performs increase/decrease control to improve fuel efficiency.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of the present invention will be described below with reference to the drawings.

As shown in Figure 1, garbage collection vehicle 1 (specially equipped vehicle)
A body 3 is mounted on the vehicle frame 2, and the body 3
A garbage storage box 4 is placed on the vehicle frame 2 and pivotally attached to the vehicle frame 2 so as to be tiltable rearward, and a garbage processing frame 5 is pivotally supported at the upper part of the rear opening of the garbage storage box 4. 6, a garbage loading means 7 provided in the garbage disposal frame 6, a dumping means 8 (dust discharge means) for discharging the garbage from the garbage storage box 4, and a lashing means for lashing the garbage disposal frame 6. It consists of 9. The garbage loading means 7 includes a rotary scraping plate 10 rotatably attached to the lower part of the garbage processing frame 6, and a pushing plate 11 pivotally attached above the rotary scraping plate 10 so as to be rotatable back and forth. The raked up debris is pushed onto the raking board 10.
1 into the garbage storage box 4. The dump means 8 is a hydraulic cylinder connected between the vehicle frame 2 and the garbage storage box 4, and is used to tilt the storage box 4 and discharge the garbage. The lashing means 9 has an engagement pin 12 on the garbage processing frame 6 and a hook 13 on the garbage storage box 4.
is provided, and the processing frame 6 is secured and released by engaging and disengaging the hook 13 from the engagement pin 12.

Further, a drive device 14 for operating and stopping the body 3 is connected to a power extraction device 17 via a transmission 16 to a traveling engine 15 of the vehicle.
A variable discharge amount pump 18 is connected to the power extraction device 17 by a drive shaft 19, and the push plate 1 is connected to the variable discharge amount pump 18 via a hydraulic solenoid valve 20.
Push cylinder 21 that rotates 1, scraping plate 10
A hydraulic actuator such as a hydraulic motor 22 that rotates the dump means 8 and a lashing cylinder 23 that rotates the hook 13 are connected, and the operation of each hydraulic actuator is controlled by switching control of a hydraulic solenoid valve 20. . Further, a step motor 25 is connected to a lever 24 of a throttle valve of the engine 15, and the speed of the engine 15 is controlled by the step motor 25.

The garbage collection vehicle 1 is equipped with an information processing device 26 that controls a hydraulic solenoid valve 20, a variable discharge pump 18, and a step motor 25, and a pressure sensor 27 is mounted on the discharge side of the variable discharge pump 18, Rotational speed sensors 28 are respectively linked to the shafts 19 . The pressure sensor 27 detects the discharge pressure to detect the load on the drive device 14, that is, the load on the rotary scraping plate 10, the pushing plate 11, and the dumping means 8, and the load signal is sent to the information processing device 26.
is input. The rotation speed sensor 28 is the engine 15
The rotational speed is detected, and the rotational signal is input to the information processing device 26.

Further, the frame 3 is provided with a limit switch 29 that detects the tilting position of the garbage storage box 4, the rotation and securing position of the garbage processing frame 6, the rotational position of the scraping plate 10, and the rotational position of the pushing plate 11. On the other hand, an in-cab operation switch 30 is provided in the driver's cab, and a rear operation switch 31 is provided in the garbage processing frame 6. The operating state signal is input to the information processing device 26. The in-cab operation switch 30 consists of a loading/unloading switch, a processing frame opening/closing switch, a storage box vertical movement switch, and a display switch, and the rear operation switch 31 includes an operation switch, a continuous single-action changeover switch, a reverse switch, a push-in switch, It consists of a reversing switch and a stop switch.

As shown in FIG. 3, the information processing device 26 uses a microcomputer, and includes a central processing unit (MPU) 32 and a read-on memory (ROM) 3.
3. Consisting of a random access memory (RAM) 34, an input circuit 35, an output circuit 36, a decoder 37, and a timer 38, the central processing unit 32 receives data from the input circuit 35 according to a predetermined program stored in the read-on memory 33. calculates the input signal of
An output signal is sent to the output circuit 36 via a control bus 39, an address bus 40, and a data bus 41. The decoder 37 is the central processing unit 32
A selection signal for determining which element the signal is to be transmitted to is generated based on the address signal from the .

The input circuit 35 includes encoders 42 and 43, a peripheral interface adapter 44, a counter 45, a data latch 46, and an analog-to-digital converter 47. The encoder 42 receives operating state signals from the processing frame opening/closing switch and storage box vertical movement switch of the in-cab operation switch 30, and the encoder 43 receives operation state signals from the rear operation switch 31.
Operating state signals from the operating switch, reversing switch, push-in switch, and reversing switch are respectively inputted, converted into binary signals, and output as 3-bit parallel signals to the interface adapter 44 together with an interrupt signal. Further, the operation status signals of the other loading/unloading changeover switch, display switch, continuous single-action changeover switch, and each limit switch 29 are input directly to the interface adapter 44.

The counter 45 receives and counts the rotation signal from the rotation speed sensor 28, and starts counting based on the output signal from the timer 38. The latch 46 also operates the counter 45 by the output signal of the timer 38.
The count signal of 4 is input and held, and data bus 4 is
Output via 1. The address/digital converter 47 receives the load signal from the pressure sensor 27, converts it into a digital signal, produces an 8-bit signal, and outputs it via the data bus 41.

The output circuit 36 is composed of a peripheral interface adapter 48 and a display 49. The interface adapter 48 controls the hydraulic solenoid valve 20,
Output signals are sent to the step motor 25, the variable discharge amount pump 18, and the abnormality buzzer.

The display 49 displays the location of the malfunction, oil pressure, engine speed, etc. based on self-diagnosis.

Next, power transmission and control will be explained based on the block diagram of the power system shown in FIG. First, the power of the engine 15 is transferred to the variable displacement pump 1 via the power extraction device 17 and the drive shaft 19.
8, and by driving the pump 18, pressure oil is transmitted to each cylinder 21, 23,
8, is supplied to the hydraulic motor 22, and the rotation of the scraping plate 10, the forward and backward rotation of the pushing plate 11, the release of the securing of the garbage processing frame 6, and the vertical movement of the garbage storage box 4 by the dumping means 8 are controlled by the information processing device 26. This is performed sequentially according to the output signal.

On the other hand, the load signal and rotation signal of the pressure sensor 27 and the rotation speed sensor 28 are input to the information processing device 26, and the step motor 25, the hydraulic solenoid valve 20, and the variable discharge amount pump 18 are controlled by the output signal of the information processing device 26. Ru.

Next, the control operation will be explained based on the processing block diagram shown in FIG.

First, the rotation speed of the engine 15 is detected by the rotation speed sensor 2.
The rotation signal is detected by block 5.
counted by the counter 45 at 0,
It is transmitted to central processing unit 32 via latch 46.

On the other hand, the discharge pressure of the variable discharge amount pump 18 is detected by the pressure sensor 27, that is, the scraping plate 10,
The load on the pushing plate 11 or the dumping means 8 is detected, and the load signal is converted into a digital signal by the analog-to-digital converter 47 in block 51 and transmitted to the central processing unit 32, and then in block 52, the load signal is converted to a digital signal in block 51 to correspond to the load. The power necessary to operate the garbage loading means 7 and the dumping means 8 is calculated, and the power required to operate the garbage loading means 7 and the dumping means 8 is calculated.
The engine speed is set to obtain the power of 2.

In block 54, the set rotation signal of block 53 and the detected rotation signal of block 50 are compared, and the throttle amount is calculated in block 55 based on the difference. Subsequently, in block 56, the interface adapter 48 issues an output signal to the step motor 25, and the step motor 25 is operated to control the engine speed. That is, for example, at the beginning of garbage loading, when the pushing plate 11 is under a low load, the engine rotational speed is low, and increases when the load becomes high near the full load. On the other hand, block 57
An output signal is output to the variable discharge amount pump 18 in order to keep the amount of oil discharged from the pump 18 constant,
The discharge amount of the pump 18 is controlled to be constant regardless of fluctuations in engine speed.

The operating state signals of both operating switches 30 and 31 are inputted to the interface adapter 44 in block 58 and transmitted to the central processing unit 32, while the operating state signals of each limit switch 29 are inputted to the interface adapter 44 in block 59. and is transmitted to the central processing unit 32. Then, in block 60, block 5
The required operation is determined based on the signals 8 and 59, and in block 61, an output signal is issued from the interface adapter 48 to the hydraulic solenoid valve 20, and the hydraulic solenoid valve 20 is switched and controlled. That is, for example, the rotation of the scraping plate 10 and the rotation of the pushing plate 11 operate in a fixed order. Further, in block 62, the output signal of block 61 and the input signal of block 59 are compared, and in block 63, the operating time is counted, while in block 64
The content of the abnormality is determined and output, and displayed on the display 49.

Incidentally, instead of the dumping means 8 in this embodiment, the garbage discharging means may be constituted by a discharge plate that moves back and forth within the garbage storage box 4.
is fixed to the vehicle frame 2.

FIG. 5 shows another example of a specially equipped vehicle, in which a mixer drum (body) 72 is rotatably mounted on a frame 71 of a mixer truck 70, and an engine 73 is equipped with a power extraction device 74 and a drive shaft 75. A variable discharge amount pump 76 is connected through the pump 76, and a hydraulic motor 77 is connected to the drive device 7.
8 is constructed, and the hydraulic motor 77 is linked to the mixer drum 72. Furthermore, engine 73
A step motor 79 is connected to the throttle valve, and the rest of the configuration is the same as in the previous embodiment, and an information processing device is installed to increase or decrease the engine speed in response to the rotational load of the mixer drum 72.
The discharge amount of the pump 76 is kept constant.

As described above, according to the present invention, an information processing device using a microcomputer is provided, and the load signal of the drive device and the rotation signal of the engine are calculated according to a program, and the engine rotation speed is controlled to increase or decrease according to the work load. As a result, the engine can be rotated at a high speed when the load is high, such as when the load is full, and at a low speed when the load is low, such as at the beginning of loading, so that fuel can be consumed efficiently.

Furthermore, if the operating state signal of the body is also input and processed, the control system can be simplified compared to the conventional system.

[Brief explanation of the drawing]

The drawings illustrate embodiments of the present invention, and FIG. 1 is a schematic side view of a garbage collection vehicle, FIG. 2 is a block diagram showing the power system, and FIG. 3 is a block diagram of the control circuit of the information processing device. FIG. 4 is a block diagram showing the control operation, and FIG. 5 is a schematic side view of the mixer truck. 1... Garbage collection vehicle, 2,71... Car frame, 3...
Frame body, 4... Garbage storage box, 6... Garbage processing frame,
7... Garbage loading means, 8... Dumping means, 10...
... Rotating scraping plate, 11... Pushing plate, 14, 78...
Drive device, 15, 73...Engine, 17, 74
...Power take-off device, 18,76...Variable discharge amount pump, 19,75...Drive shaft, 20...
... Hydraulic solenoid valve, 21 ... Push cylinder, 2
2,77...Hydraulic motor, 25,79...Step motor, 26...Information processing device, 27...Pressure sensor, 28...Revolution speed sensor, 29...Limit switch, 30...In-cab operation switch, 3
1... Rear operation switch, 32... Central processing unit, 33... Read-on memory, 34... Random access memory, 35... Input circuit, 36...
Output circuit, 44, 48... Peripheral interface adapter, 45... Counter, 47...
Analog/digital converter, 49...Display, 70...Mixer truck, 72...Mixer drum.

Claims (1)

[Claims] 1. In a specially equipped vehicle in which a body is mounted on a vehicle frame and a drive device for starting and stopping the body is provided, a load signal of the drive device and a rotation signal of the engine are provided. An information processing device is provided which calculates both input signals according to a predetermined program, and the engine rotation speed is controlled according to the work load of the bodywork by the output signal of the information processing device. Operation control device for specially equipped vehicles. 2 The mounting body includes a garbage storage box mounted on the vehicle frame, a garbage disposal frame rotatably supported at the upper part of the rear opening of the garbage storage box, and a garbage storage space provided within the garbage disposal frame. 2. The operation control device for a specially equipped vehicle according to claim 1, comprising: a loading means; and a dust discharge means for discharging the dust in the dust storage box. 3. Operation control of a specially equipped vehicle according to claim 2, wherein the garbage loading means comprises a rotating scraping plate and a pushing plate for pushing the garbage on the rotating scraping plate into the garbage storage box. Device. 4 The garbage discharge means is a discharge plate provided in the garbage storage box so as to be movable back and forth.
The operation control device for the specially equipped vehicle described in 2. 5. The operation control device for a specially equipped vehicle according to claim 2, wherein the garbage discharge means is a dump means for tilting the garbage storage box. 6. The operation control device for a specially equipped vehicle according to claim 1, wherein the information processing device receives an operating state signal of the body and calculates the operating state signal together with a load signal and a rotation signal. 7. The operation control device for a specially equipped vehicle according to claim 1, wherein the information processing device has a display and displays engine rotation speed and the like. 8. The operation control device for a specially equipped vehicle according to claim 1, wherein the drive device has a variable displacement pump linked to the engine. 9. The operation control device for a specially equipped vehicle according to claim 1, wherein the load signal of the drive device is detected by a pressure sensor from the discharge pressure of the variable discharge amount pump. 10. Operation control of a specially equipped vehicle according to claim 1, wherein the engine rotation signal is detected by a rotation speed sensor from the rotation speed of a drive shaft that connects the power extraction device and the variable displacement pump. Device. 11. The specially equipped vehicle according to claim 1, wherein the operating state signal of the body is detected by an operating position detection limit switch of the dust loading means and the dust discharging means, an in-cab operating switch, and a rear operating switch. operating control device. 12 The garbage loading means and the garbage discharging means are operated by a plurality of hydraulic actuators of the drive device,
3. The operation control device for a specially equipped vehicle according to claim 2, wherein the hydraulic actuator is operated and controlled by a hydraulic solenoid valve that is switched and controlled by an output signal from an information processing device. 13. The operation control device for a specially equipped vehicle according to claim 1, wherein the engine is speed-increased by a step motor whose rotation is controlled by an output signal from an information processing device.