JPH07330109A - Garbage collector - Google Patents

Abstract

PURPOSE:To perform a simple operation according to operation of an operation switch by providing an operation switch for operating a garbage collector control circuit and a circuit means for controlling increasing and reduction of generation amount of electricity to an inverter control circuit for controlling an inverter circuit interlocking with the operation switch. CONSTITUTION:An electric source is supplied to a light emitting diode 20a and a signal line of an inverter control circuit 5 is grounded if an operation switch 19 is switch to a loading processing side when loading. The inverter circuit 4 us controlled by the inverter control circuit 5 so as to provide rotational phase generating negative skid to a basket type inductor 2. The inverter circuit 4 delays the rotational phase and increase quantity of power of the basket type inductor 2. At the same time, an electronic governor 24 adjusts fuel supplying quantity of an internal combustion engine 1 so as to provide a rotational speed suitable for increasing the quantity of power. A garbage collector control circuit 17 will supply DC source from a DC/DC converter 16 to a motor 18 when a rotational plate drive switch is pressed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention converts mechanical energy generated when an internal combustion engine is braked into electrical energy and stores the electrical energy, and auxiliary acceleration of the electrical energy stored when accelerating the internal combustion engine. It is used for a device that supplies mechanical energy to the device.

The present invention relates to the international publication WO88 / 061.
No. 07 (International Application No. PCT / JP88 / 00157) relates to a vehicle equipped with an electric braking and auxiliary accelerator for the vehicle. The present invention relates to a technique for equipping a vehicle equipped with an auxiliary acceleration and auxiliary braking device, which is sold by the applicant of the present application under the name of HIMR, as a garbage truck (garbage truck).

[0003]

2. Description of the Related Art Conventionally, garbage trucks have been constructed such that power is taken out from a running internal combustion engine by a PTO (power take-off) as a power for loading dust and a power for discharging dust. Was there. In this system, a gear and a shaft for PTO are added to a transmission gear, and a driver operates a transmission gear of a stopped vehicle to take out power from the PTO shaft.

Since the above-mentioned HIMR vehicle is equipped with a large-capacity DC power supply for auxiliary braking and auxiliary acceleration, the power for loading and unloading dust is supplied from a DC motor using this DC power supply. You can take it out. Equipment for this is designed, prototyped and tested.

[0005]

In such a dust truck, a DC power supply for auxiliary braking and acceleration requires an opening / closing circuit for connecting a DC motor for dust disposal, and an opening / closing circuit for controlling the opening / closing circuit is required. A control circuit is required, and further, it is necessary to provide an operation switch that makes it easy for an operator who performs dust processing on the opening / closing control circuit.

On the other hand, when electric power is supplied to the electric motor for treating dust, it is necessary to increase the amount of power generation during the period during which the electric power is supplied. In the HIMR vehicle, the amount of power generation is increased / decreased by controlling the phase angle of the alternating current supplied to the cage induction machine directly connected to the internal combustion engine. That is,
This is done by changing the control phase of the inverter circuit that bidirectionally connects the DC circuit and the squirrel cage induction machine. Since this inverter circuit is a high voltage (several hundred V) circuit,
It is not appropriate to directly control this inverter circuit,
It controls a control circuit (computer) that gives a control signal to the inverter circuit.

The present invention has been made against such a background, and provides an apparatus capable of simply performing an operation according to an operation of an operation switch for dust disposal when an operator performs dust disposal. The purpose is to provide. The present invention automatically reduces or increases the rotational speed of an internal combustion engine in association with dust disposal work, and generates electric power equivalent to the amount consumed in this dust disposal work, thereby reducing the labor of a worker and operating mistakes. It is an object of the present invention to provide a device for preventing over-discharge of a battery due to.

[0008]

SUMMARY OF THE INVENTION The present invention uses a device for converting mechanical energy generated during braking of an automobile into electric energy and storing the electric energy, and performing auxiliary acceleration by the electric energy accumulated during acceleration. And a squirrel cage induction machine connected to the rotary shaft of the internal combustion engine.
And an inverter circuit for bidirectionally converting and coupling electric energy between the power storage means, the multi-phase AC circuit of the squirrel cage induction machine and the direct current circuit of the power storage means, and an inverter control circuit for controlling the inverter circuit. In a dust truck having a braking and auxiliary power unit for an internal combustion engine, and an electric motor for dust disposal connected to the DC circuit through an electric motor opening / closing control circuit controlled by the dust disposal machine control circuit, the dust disposal machine control circuit is operated. Is provided, and circuit means for controlling increase / decrease in power generation amount is provided for the inverter control circuit for controlling the inverter circuit in association with the operation switch.

The circuit means includes a photocoupler whose input is a circuit on the side of the operation switch and whose output is connected to an inverter control circuit for controlling the inverter circuit. Light is emitted in the vicinity of the operation switch according to the operation of the operation switch. It is desirable that a lamp be provided and that the input of the photocoupler be connected to this lamp.

[0010]

[Function] When the operation switch is operated to either the loading side or the discharging side of the dust, the lamp lights up to indicate that the dust disposal mode has been set, and at the same time, current is supplied to the light emitting diode of the photocoupler. The transistor is turned on, and the inverter control circuit is instructed to dispose of dust. The inverter control circuit sets the dust disposal mode by this command, controls the inverter circuit so as to give a rotating magnetic field that causes a negative slip to the squirrel cage induction machine while taking in the rotation speed of the internal combustion engine from the rotation sensor, and To increase the amount of power generation. At the same time, the electronic governor controls the fuel injection device to adjust the driving state of the internal combustion engine so as to give the squirrel cage induction machine a rotational speed suitable for increasing the amount of power generation. The dust control circuit supplies the DC power thus generated to the electric motor through the electric control circuit to drive the hydraulic pump, and also controls the solenoid valve to operate the hydraulic cylinder.

With this, it is possible to connect and disconnect the electric current to the electric motor for dust disposal by a simple operation of switching only one operation switch, and to change the rotation speed of the internal combustion engine so as to correspond to the dust disposal. Since it can be automatically increased / decreased, it is possible to reduce the labor of the operator and prevent the battery from being over-discharged due to an operation error.

[0012]

Embodiments of the present invention will now be described with reference to the drawings. 1 is a block diagram showing the configuration of an embodiment of the present invention, FIG.
[Fig. 2] is an enlarged view of a portion A shown in Fig. 1 in the embodiment of the present invention.

In the embodiment of the present invention, a squirrel cage induction machine 2 whose rotor portion is directly connected to an internal combustion engine 1, a power storage means 3, and a DC voltage of the power storage means 3 are used to rotate the squirrel cage induction machine 2. An inverter that converts an AC voltage having a frequency suitable for inducing a rotating magnetic field having a lower rotation speed, supplies the AC voltage to the squirrel cage induction machine 2 and converts AC power from the squirrel cage induction machine 2 into DC power. A braking and auxiliary power unit including a circuit 4 and an inverter control circuit 5 for generating a control signal for setting the frequency of the AC side voltage of the inverter circuit 4 is provided. The inverter control circuit 5 includes means for generating a control command by the driver according to the driving of the automobile. Also,
A rotation sensor 6 is attached to the squirrel cage induction machine 2,
The signal from the rotation sensor 6 is given to the inverter control circuit 5, and further the information from the power storage means 3 regarding the charge state of the power storage means 3 is input.

A capacitor 7 and a semiconductor switch circuit 12 are connected to the output side of the inverter circuit 4, and a resistor 11 is connected via the semiconductor switch circuit 12.
The resistor 11 is configured to dissipate when the vehicle is heavily braked and excessive electrical energy is generated that cannot be regenerated. A detection circuit 13 that detects the output voltage of the inverter circuit 4 is connected to the storage means 3 and the semiconductor switch circuit 12, and the resistor 11 is provided with a current detector 15 that detects a change in current. A switch control circuit 14 that controls the semiconductor switch circuit 12 according to the detection signal is connected to the current detection circuit 15. The detection circuit 13 is connected to the switch circuit 14.

Further, as a feature of the present invention, the storage means 3
DC / DC converter 16 connected to this DC circuit, dust control machine 17 connected to this DC / DC converter 16, motor control circuit 22 controlled by this dust control circuit 17, and this motor control circuit A dust removal electric motor 18 driven according to the control of 22, a manipulation switch 19 for operating the dust control circuit 17, and an inverter control circuit whose output controls the inverter circuit 4 with a circuit on the side of the manipulation switch 19 as an input. 5, circuit means including a photocoupler 20 for controlling the increase and decrease of the amount of power generation, and a lamp 21 arranged near the operation switch 19 and connected to the input of the photocoupler 20.

The operation switch 19 and the lamp 21 are shown in FIG.
It is placed in the driver's seat as shown in. The operation switch 19 is in the OFF position and is configured to be switched between the loading processing side and the discharging processing side when the dust disposal is not performed. Further, the photocoupler 20 is electrically connected to the light emitting diode 20a which is supplied with current from the DC / DC converter 16 when the operation switch 19 is switched to the loading process side or the discharging process side, and the light emitting diode 20a conducts light to make an inverter. It is configured by a phototransistor 20b that grounds the control circuit 5.

Further, an electronic governor 24 for adjusting the fuel injection amount of the fuel injection device 23 is connected to the control circuit 5, a hydraulic pump 26 is connected to the electric motor 18 for dust disposal, and the hydraulic pump 26 controls dust disposal. It is connected to the hydraulic cylinder 25 via an electromagnetic valve 27 controlled by the circuit 17.

Next, the operation of the embodiment of the present invention thus constructed will be described. First, the electrical operation of the braking and auxiliary power unit according to the present invention will be described.

The rotor of the squirrel cage induction machine 2 is rotationally driven by the main shaft of the internal combustion engine 1 mounted on the automobile. When the traveling of the vehicle is braked by releasing or absorbing the mechanical energy of the rotating system, the stator of the squirrel cage induction machine 2 receives a rotating magnetic field having a lower rotation speed than the rotation speed of the rotor portion of the squirrel cage induction machine 2. A voltage having a frequency suitable for being induced in the winding is applied to the stator winding of the squirrel cage induction machine 2 from the storage means 3 via the inverter circuit 4. As a result, the mechanical energy of the rotating system is converted into electric energy, and this electric energy is charged in the electricity storage means 3. The inverter control circuit 5 includes a device for controlling the degree of braking according to the driving of the vehicle in the inverter circuit 4.

When a large braking torque is temporarily generated as the vehicle is driven, it is difficult to regenerate all the electric energy generated from the squirrel cage induction machine 2 into the power storage means 3, and the semiconductor switch circuit 12 is used. The heat is dissipated as heat energy by the resistor 11 via the resistor 11. The semiconductor switch 12 includes a circuit that monitors the DC terminal voltage and automatically connects the resistor 11 to both ends of the storage means 3 when the terminal voltage exceeds a predetermined value.

That is, when the braking force is generated in the rotating system, the inverter control circuit 5 generates a rotating magnetic field having a speed lower than the rotation speed of the rotor portion of the cage induction machine 2 detected by the rotation sensor 6 in the form of a cage. A control signal is generated so as to be applied to the stator portion of the induction machine 2. At this time, the squirrel cage induction machine 2 operates as a generator, and the generated electric energy is converted into DC energy by the inverter circuit 4 and supplied to the storage means 3 as a charging current. The brake torque is large,
When the storage means 3 cannot absorb this DC energy, the DC terminal voltage rises above a predetermined value, and the semiconductor switch circuit 12 detects this and connects the resistor 11 to the terminal of the storage means 3. Closed.

On the other hand, when the driving force is applied to the rotary system, the inverter control circuit 5 produces a rotating magnetic field having a speed higher than the rotational speed of the rotor portion of the cage induction machine 2 detected by the rotation sensor 6 in the form of a cage. A control signal is generated so as to be applied to the stator portion of the induction machine 2. At this time, a direct current is taken out from the storage means 3, converted into a multi-phase alternating current corresponding to the rotating magnetic field by the inverter circuit 4, and supplied to the cage induction machine 2.

Here, the greater the difference between the rotational speed of the rotating magnetic field and the shaft rotational speed, the greater the braking torque and the driving force. The ratio of this difference to the rotation speed of the rotating magnetic field, that is, the slip of the squirrel cage induction machine 2 is set within a range of approximately ± 10%.

In the case of controlling the charging of the storage means 3, the inverter circuit 4 sends a control signal from the inverter control circuit 5 for giving the stator of the squirrel cage induction machine 2 a rotating magnetic field corresponding to the rotation of the rotor. Is being supplied. The rotation information from the rotation sensor 6 is input to the inverter control circuit 5,
In addition, information regarding the charge state of the power storage unit 3 is input. The inverter control circuit 5 includes a microprocessor, and also includes means for taking in an operation control signal that changes according to the driving condition by the driver's operation.

In this way, the inverter circuit 4 can apply the energy of the DC side terminal to the AC side terminal and the energy generated at the AC side terminal to the DC side terminal. Further, by controlling the inverter control circuit 5, the rotation speed of the rotating magnetic field is controlled so that the squirrel cage induction machine 2 becomes an electric motor, and a driving force is applied to the rotation shaft of the squirrel cage induction machine 2 to assist the internal combustion engine 1. It can be operated as a device.
At this time, the electric energy charged in the storage means 3 is used.

The present invention intends to utilize the electric power generated by the above-described squirrel cage induction machine 2 for the electric motor for dust disposal. Here, the dust disposal operation will be described. Figure 4
Is a perspective view showing the outer appearance of the rear side of the garbage truck according to the embodiment of the present invention, FIG. 5 is a diagram for explaining the loading operation of the dust according to the embodiment of the present invention, and FIG. 6 is a discharge of the dust according to the embodiment of the present invention. It is a figure explaining work.

The dust processing work includes a loading work for loading the dust and a discharging work for discharging the loaded dust to the processing facility. For loading, as shown in FIGS. 4 and 5, the rotary plate 28 is rotated by the hydraulic motor 30, scraps thrown into the input port 31a of the packer 31 are scraped up to the entrance of the body 32, and the scraps scooped up. Is performed by rotating the pushing plate 33 with the hydraulic cylinder 25a and pushing the pushing plate 33 into the body 32. In addition, as shown in FIG. 6, the discharging work is performed after the packer 31 is lifted by the hydraulic cylinder 25b and then the body 3 is discharged.
2 is dumped by the hydraulic cylinder 25c.

When carrying out the loading operation, when the operation switch 19 arranged in the driver's seat is switched from the OFF position to the loading processing side as shown in FIG.
An operation signal is sent from two routes to the DC / D
Low voltage power of 24V is supplied from the C converter 16 to the lamp 21 and the light emitting diode 20a. The lamp 21 is turned on by this power supply and indicates that the dust disposal mode is set.

On the other hand, the light emitting diode 20a is also supplied with power and emits light to illuminate the phototransistor 20b. Upon receiving this irradiation, the phototransistor 20b becomes conductive and the signal line of the inverter control circuit 5 is grounded. Assuming that the dust disposal mode is set by the appearance of the ground potential, the inverter control circuit 5 operates the inverter circuit 4 so as to apply the rotation speed from the rotation sensor 6 to the cage induction machine 2 to give a rotating magnetic field that causes a negative slip. Control. The inverter circuit 4 delays the rotation phase according to this control to increase the amount of power generation of the squirrel cage induction machine 2. At the same time, the electronic governor 24 receives the idle up signal and adjusts the fuel supply amount of the internal combustion engine 1 so that the fuel injection device 23 gives the squirrel cage induction machine 2 a rotation speed suitable for increasing the amount of power generation. Here, when the rotary plate drive switch 29 shown in FIG. 4 is pressed, the dust disposal machine control circuit 17 causes the electric motor control circuit 22 to operate.
The DC power from the DC / DC converter 16 is supplied to the electric motor 18 via the control signal and the control signal is sent to each of the solenoid valves 27 provided in the pipeline to the hydraulic motor 30 and the pipeline to the hydraulic cylinder 25a. The electric motor 18 receives the power supply and drives the hydraulic pump 26, and the solenoid valve 27
Opens and closes the hydraulic line according to the control signal.

The hydraulic pump 26 supplies the oil in the reservoir tank 34 as pressure oil to the hydraulic motor 30 and the hydraulic cylinder 25a via the solenoid valve 27. The hydraulic motor 30 supplied with the pressure oil rotates the rotating plate 28 to scrape up the dust thrown into the throwing port 31a of the packer 31 to the entrance of the body 32. The scraps of dust scraped up are pushed into the body 32 by the pushing plate 33 which rotates as the electromagnetic valve 27 opens and closes.

When the loading of the dust is completed and the rotary plate drive switch 29 is turned off, the dust control circuit 17 stops the power supply to the electric motor 18, which causes the hydraulic pump 26.
The supply of the pressure oil from the to the hydraulic motor 30 and the hydraulic cylinder 25a is stopped. In addition, the operation switch 1 on the driver's seat
When 9 is operated to the OFF position, the power supply to the lamp 21 and the light emitting diode 20a is cut off, the lamp 21 is turned off, the ground potential from the phototransistor 20b disappears, and the inverter control circuit 5 releases the dust mode. And set the normal drive mode.

When the operation switch 19 provided in the driver's seat for discharging the dust in the body 32 is switched to the discharge processing side, an operation signal is sent to the dust control machine 17 from one path, whereby. The dust control circuit 17 recognizes that the discharge process is set. Further, as in the loading processing operation, power is supplied to the lamp 21 and the light emitting diode 20a, the ground potential appears in the inverter control circuit 5, and the dust disposal mode is set.

The dust control circuit 17 is an electric motor control circuit 22.
The electric power is supplied to the electric motor 18 via the hydraulic cylinder 25b connected to the packer 31 and the body 3
A control signal is sent to each of the solenoid valves 27 provided in the pipeline of the hydraulic cylinder 25c connected to 2. As the solenoid valve 27 is opened and closed, the hydraulic cylinder 25b supplied with the pressure oil from the hydraulic pump 26 pushes up the packer 31 as shown in FIG. 6, and then the hydraulic cylinder 25c dumps up the body 32 as shown in FIG. To do. As a result, the dust in the body 32 is discharged to the outside.

When the operation switch 19 is returned to the OFF position, the dust control circuit 17 shuts off the power supply from the electric motor control circuit 22 to the electric motor 18, and supplies the hydraulic oil from the hydraulic pump 26 to the hydraulic cylinders 25b and 25c. To stop.
By stopping the supply of the pressure oil, the hydraulic cylinders 25b and 2
5c returns to the original position, and the packer 31 and the body 3
Set 2 so that it can run.

On the other hand, the lamp 21 and the light emitting diode 2
Since the power supply to 0a is also cut off, the lamp 21 is turned off,
The light emission from the light emitting diode 20a is stopped and the phototransistor 20b is turned off. Along with this, the ground potential of the inverter control circuit 5 disappears, and the inverter control circuit 5 releases the dust disposal mode and sets the normal traveling mode.

[0036]

As described above, according to the present invention, when a worker performs dust disposal, loading of the clutch and the dust is performed by a simple operation of switching one operation switch for dust disposal. It is possible to perform the dust disposal without performing any switch operation for discharging. Further, since the rotation speed of the internal combustion engine can be automatically increased / decreased in conjunction with the disconnection of the electric current supplied to the electric motor for dust disposal, the labor of the worker is reduced and the battery is over-discharged due to an operation error. There is an effect that can be prevented.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention.

FIG. 2 is an enlarged view of an A portion shown in FIG. 1 according to the embodiment of the present invention.

FIG. 3 is a diagram showing an arrangement example of operation switches and lamps in the embodiment of the present invention.

FIG. 4 is a perspective view showing the outer appearance of the rear side of the garbage truck according to the embodiment of the present invention.

FIG. 5 is a diagram for explaining a dust loading operation according to the embodiment of the present invention.

FIG. 6 is a diagram for explaining a dust discharging operation according to the embodiment of the present invention.

[Explanation of symbols]

 1 Internal Combustion Engine 2 Cage Induction Machine 3 Storage Means 4 Inverter Circuit 5 Inverter Control Circuit 6 Rotation Sensor 7 Capacitor 11 Resistor 12 Semiconductor Switch Circuit 13 Detection Circuit 14 Switch Control Circuit 15 Current Detector 16 DC / DC Converter 17 Dust Control Circuit 18 Electric motor 19 Operation switch 20 Photo coupler 20a Light emitting diode 20b Phototransistor 21 Lamp 22 Electric motor control circuit 23 Fuel injection device 24 Electronic governor 25a, 25b, 25c Hydraulic cylinder 26 Hydraulic pump 27 Electromagnetic valve 28 Rotating plate 29 Rotating plate drive switch 30 Hydraulic Motor 31 Packer 31a Input port 32 Body 33 Push plate 34 Reservoir tank

Claims (3)

[Claims] 1. A squirrel-cage induction machine connected to a rotating shaft of an internal combustion engine, a power storage means, a multi-phase AC circuit of the squirrel-cage induction machine, and a direct-current circuit of the power storage means to convert electric energy bidirectionally. And an auxiliary power unit for an internal combustion engine including an inverter circuit for controlling the inverter circuit, and an inverter control circuit for controlling the inverter circuit, and the dust is supplied to the DC circuit via an electric motor control circuit controlled by the dust control circuit. In a dust truck to which a processing electric motor is connected, an operation switch for operating the dust truck control circuit is provided, and circuit means for controlling an increase / decrease in power generation amount with respect to an inverter control circuit for controlling the inverter circuit, A garbage truck characterized by being installed in conjunction with the operation switch. 2. The garbage truck according to claim 1, wherein said circuit means includes a photocoupler whose input is a circuit on the side of said operation switch and whose output is connected to an inverter control circuit for controlling said inverter circuit. 3. A lamp which emits light according to the operation of the operation switch is arranged near the operation switch, and an input of the photocoupler is connected to the lamp.
The garbage truck described.