JPH08308020A - Auxiliary acceleration and auxiliary brake unit - Google Patents

Abstract

PURPOSE: To avoid the abrupt change of the rotating state of an internal combustion engine irrespective of the output change of an accelerator sensor by turning an inverter to an OFF mode by a control circuit when the fact that a load is applied to power take-up means coupled to the rotary shaft of the engine is electrically detected. CONSTITUTION: The auxiliary accelerator comprises a control circuit 5 for controlling an inverter 4 according to pieces of information of the rotating speeds and the load states of a squirrel-cage induction machine 2 directly coupled to the rotary shaft of an internal combustion engine 1, electric storage means 3, the inverter 4 and the engine 1. When the fact that power take-off means PTO 20 is coupled to the rotary shaft of the engine 1 and a load is coupled to the PTO 20 is electrically detected by a detector 10, the circuit 5 sets the inverter 4 to an OFF mode. Further, a rotation sensor 6 is mounted at the engine 1, a capacitor 7 is provided at the output side of the inverter 4, and DC-DC converter 19 is connected to the means 3. Thus, the change of the load applied to the engine is reduced, and power transmission from the PTO is smoothly conducted.

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 improvements in electric braking and auxiliary accelerators for automobiles. The present invention is a device suitable for mounting on a vehicle equipped with auxiliary acceleration and auxiliary braking devices sold by the applicant under the name HIMR. The present invention is applicable to dump trucks, garbage trucks, fire trucks, crane vehicles, and other power take-out means (PTO, Power Take Off).
It is used for automobiles that work with the power extracted from.

[0003]

2. Description of the Related Art A squirrel-cage induction machine connected to a rotating shaft of an internal combustion engine, a storage means for storing DC power, a multi-phase AC circuit of the squirrel-cage induction machine, and a DC circuit of the storage means are electrically operated bidirectionally. A vehicle equipped with an auxiliary acceleration braking system has been put into practical use, which includes an inverter circuit that converts and combines energy and a control circuit that controls the inverter circuit according to the information on the rotation speed and the load state of the internal combustion engine.

The vehicle with the auxiliary accelerating braking device is to be used for buses, trucks, etc., but it is also used for work vehicles such as dump trucks, garbage trucks, fire trucks, and crane trucks. There is a customer request to be able to.

For the working power, a power take-out means (PTO) is connected to the rotary shaft of the internal combustion engine, and a control means for controlling the power take-out means is provided, and the control means responds to the fluctuation of the load of the working apparatus. The accelerator sensor is operated so as to be in the same state as when the accelerator pedal is depressed, and its output is sent to the electronic governor control circuit to control the fuel injection.

[0006]

With respect to the power taken out from the vehicle equipped with the auxiliary acceleration / braking device, the output voltage from the accelerator sensor becomes substantially constant unless the load of the installed work device fluctuates significantly. Although it is smoothly supplied to the working device, the load of the working device is not always within a certain range and generally varies greatly. Therefore, the output voltage of the accelerator sensor, which indicates the amount of depression of the accelerator pedal, constantly fluctuates, and the power generation mode or the auxiliary acceleration mode is set depending on the output voltage. for that reason,
There is a problem that the rotational speed of the internal combustion engine constantly changes, and the power taken out is affected by the change, causing unevenness in the operation of the work device.

The present invention has been made under such a background, and smoothly extracts power from a power extraction means provided in a vehicle equipped with an auxiliary acceleration braking device.
An object of the present invention is to provide a device that stabilizes the operation of the working device.

[0008]

The present invention is characterized by smoothly taking out power from an automobile equipped with an auxiliary accelerator and / or an auxiliary braking device.

That is, a first aspect of the present invention is to provide an electric device for auxiliary acceleration and auxiliary braking, which is a squirrel-cage induction machine connected to a rotary shaft of an internal combustion engine, and a storage means. An inverter circuit for bidirectionally converting and coupling electric energy between the multi-phase AC circuit of the squirrel cage induction machine and the DC circuit of the storage means, and the inverter circuit according to the information on the rotation speed and the load state of the internal combustion engine. In an auxiliary acceleration braking device having a control circuit for controlling the circuit,
A power take-out means (PTO) is connected to the rotary shaft, and a detecting means is provided for electrically detecting that a load is connected to the power take-out means, and the control circuit outputs the detection output of the detecting means to the inverter. It is characterized by comprising means for controlling the circuit in the off mode.

A second aspect of the present invention is to provide an electric motor for auxiliary acceleration, which includes an electric motor connected to a rotary shaft of an internal combustion engine, and an electric motor connected to the internal combustion engine when the output torque of the internal combustion engine is insufficient. In an auxiliary accelerator equipped with a control means for supplying an electric current, a power take-out means (PTO) connected to the rotary shaft, and a detection means for electrically detecting that an output load is connected to the power take-out means. And the control means includes means for prohibiting the supply of current to the electric motor according to the detection output of the detection means.

A third aspect of the present invention is to provide an electric device for auxiliary braking, wherein a generator connected to a rotary shaft of the internal combustion engine and the internal combustion engine are accelerated from the load side. In this case, in the auxiliary braking device including the control means for extracting the current from the generator, it is possible to electrically connect the power take-out means (PTO) connected to the rotary shaft and the output load connected to the power take-out means. The control means includes means for detecting, and the control means includes means for prohibiting current extraction from the generator according to the detection output of the detection means.

[0012]

When the power take-out means (PTO) is connected to the rotary shaft of the internal combustion engine for driving the vehicle and is utilized, the vehicle is in a stopped state in most of the states and the parking brake is applied. . In such a state, it is not necessary to perform the auxiliary acceleration, and even if the auxiliary braking is performed, a large amount of energy cannot be recovered. Therefore, in this case, it is rational that the auxiliary acceleration or the auxiliary braking is not used.

According to the present invention, when a load is applied to the power take-out means connected to the rotary shaft of the internal combustion engine, the detecting means electrically detects the connection of the load, and the control circuit receives the detection output. To set the inverter circuit to the off mode. As a result, even if the output from the accelerator sensor fluctuates, the power generation mode is set according to the fluctuation,
Since the auxiliary acceleration mode is not set, it is possible to avoid a sudden change in the rotation state of the internal combustion engine that occurs due to a change in the mode setting, and it is possible to smoothly transmit power to the working device. it can.

An electric motor connected to the rotary shaft of the internal combustion engine;
In the case of a vehicle configured to perform auxiliary acceleration by providing a control means for supplying a current to the electric motor when the output torque of the internal combustion engine is insufficient, the power take-out means (PT
O) is connected to the power take-out means so as to electrically detect that an output load is connected to the power take-out means, and the control means turns off all the semiconductor switches of the inverter circuit by the output of the detection means. Stop supplying current to the motor. Since this current supply is stopped, the auxiliary acceleration by the electric motor is eliminated, so that the rotation state of the internal combustion engine is stabilized and the power is smoothly transmitted to the working device.

Further, in the case of a vehicle equipped with an auxiliary braking device equipped with a generator connected to the rotary shaft of the internal combustion engine, and a control means for extracting current from the generator when the internal combustion engine is accelerated from the load side. A power take-out means (PTO) is connected to the rotary shaft of the internal combustion engine, and this power take-out means (PTO)
A detection means for electrically detecting that the output load is connected is provided, and the output of this detection means causes the control means to prohibit current extraction from the generator. As a result, the power generation mode is not set, and therefore the rotational state of the internal combustion engine is not greatly changed, and stable power is transmitted to the working device.

[0016]

Embodiments of the present invention will now be described with reference to the drawings.

(First Embodiment) FIG. 1 is a block diagram showing the configuration of the first embodiment of the present invention. The first embodiment of the present invention shows an example in which the auxiliary acceleration braking device is provided, and the cage induction machine 2 connected to the rotary shaft of the internal combustion engine 1 and the power storage means 3 are provided.
And an inverter circuit 4 for bidirectionally converting and coupling electric energy between the multi-phase AC circuit of the squirrel cage induction machine 2 and the DC circuit of the storage means 3, and according to the information on the rotation speed and the load state of the internal combustion engine 1. The control circuit 5 for controlling the inverter circuit 4 is provided, and the power take-out means (PTO) 20 is connected to the rotating shaft of the internal combustion engine 1, and it is electrically detected that a load is connected to the power take-out means 20. The detecting means 10 is provided, and the control circuit 5 is provided with means for controlling the inverter circuit 4 to the off mode by the detection output of the detecting means 10. Further, a rotation sensor 6 is attached to the internal combustion engine 1, a capacitor 7 connected to the output side of the inverter circuit 4 is provided, and the DC / DC converter 1 is provided in the storage means 3.
9 is connected.

Next, the operation of the first embodiment of the present invention thus constructed will be described. First, the basic operation of the auxiliary acceleration / braking system according to the first embodiment of the present invention will be described.

When the auxiliary acceleration mode is set by the driver's operation, the control circuit 5 induces a rotating magnetic field at a speed higher than the rotation speed of the rotor portion of the cage induction machine 2 detected by the rotation sensor 6 into a cage shape. The control signal given to the stator section of the machine 2 is sent to the inverter circuit 4. The inverter circuit 4 extracts DC power from the storage means 3 in accordance with this control signal, converts it into a corresponding multiphase AC, and supplies it to the rotating magnetic field of the squirrel cage induction machine 2. As a result, the squirrel cage induction machine 2 operates as an electric motor and gives auxiliary power to the internal combustion engine 1.

When the auxiliary braking mode is set by the operation, the 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 cage shape. A control signal given to the rotor section of the polyphase induction machine 2 is sent to the inverter circuit 4. The inverter circuit 4 operates as a generator according to this control signal,
The inverter circuit 4 converts the generated electric energy into DC energy and supplies it to the storage means 3 as a charging current.

The auxiliary acceleration braking device performs such auxiliary acceleration and auxiliary braking according to the mode setting by the driver. The feature of the present invention lies in that the power take-out means (P
The OFF mode control is performed when the TO) 20 is connected. FIG. 2 is a flow chart showing the flow of control operation in the first embodiment of the present invention. That is, when the detection means 10 detects that a load is connected to the power take-out means 20 and the detection signal is sent to the control circuit 5, the control circuit 5 immediately sets the inverter circuit 4 to the off mode.

Since the inverter circuit 4 is set to the off mode, regardless of the value detected by the accelerator sensor 17, the DC energy of the storage means 3 is converted into AC energy and supplied to the squirrel cage induction machine 2. Both the operation of performing auxiliary acceleration as an electric motor and the auxiliary braking operation of operating the squirrel cage induction machine 2 as a generator to apply an electrical load to the internal combustion engine 1 are stopped. As a result, the load of only the working device is applied to the internal combustion engine 1 via the power take-out means (PTO), the large load fluctuation caused by the auxiliary acceleration mode or the auxiliary braking mode is eliminated, and the power take-out means (PTO) is eliminated. ) Is smoothly transmitted.

FIG. 3 is a block diagram showing the configuration of the second embodiment of the present invention. The second embodiment of the present invention shows an example in which an auxiliary accelerating device is provided. When the output torque of the internal combustion engine 1 and the electric motor 23 connected to the rotary shaft of the internal combustion engine 1 are insufficient, the electric current is supplied to the electric motor. And a power take-out means (PTO) 20 connected to the rotary shaft of the internal combustion engine 1, and electrically detecting that an output load is connected to the power take-out means 20. Detection means 1
0, and the control means 26 includes means for prohibiting the supply of current to the electric motor 23 by the detection output of the detection means 10. A rotation sensor 6 is attached to the internal combustion engine 1, and an inverter circuit 24 for converting and coupling electric energy from the power storage means 3 to a polyphase AC circuit of the electric motor 23, a rotation speed of the internal combustion engine 1 from the rotation sensor 6, and A control unit 26 for controlling the inverter circuit 24 according to the load state information is provided, and the power storage unit 3 is connected to the DC / DC converter 19. A large number of semiconductor switches are arranged inside the inverter circuit 24.

In the case of the second embodiment, since the electric motor 23 is connected to the rotary shaft of the internal combustion engine 1, the auxiliary acceleration mode can be set by the driver's operation input. The control operation is performed similarly to the auxiliary acceleration mode in the first embodiment. FIG. 4 is a flow chart showing the flow of control operation in the second embodiment of the present invention. In the case of the second embodiment of the present invention, auxiliary acceleration is performed by an operation input during normal traveling, but the control means 26 takes in the detection output from the detection means 10, and the detection output is the power take-out means (PTO) 20.
If it is indicated that the load is connected to, the supply of current to the electric motor 23 is prohibited. This current inhibition is performed by turning off all the semiconductor switches arranged in the inverter circuit 24.

In this way, the power take-off means (PTO) 20
When the power is taken out from the power storage means 3, the electric current supply from the power storage means 3 to the inverter circuit 24 is stopped, so that the auxiliary acceleration is not performed, the operating state of the internal combustion engine 1 is not greatly changed, and the power take-out means (PTO) 20 outputs Power can be taken out smoothly.

(Third Embodiment) FIG. 5 is a block diagram showing the configuration of the third embodiment of the present invention. The third embodiment of the present invention shows an example in which an auxiliary braking device is provided.
Is provided with a generator 32 connected to the rotating shaft of the internal combustion engine 1 and a control means 36 for extracting a current from the generator 32 when the internal combustion engine 1 is accelerated from the load side. The power take-out means (PTO) 20 and the detecting means 10 for electrically detecting that an output load is connected to the power take-out means 20 are provided, and the control means 36 is provided with the detection output of the detecting means 10. Means are included for inhibiting current draw from the generator 32.

A rotation sensor 6 is attached to the internal combustion engine 1, an inverter circuit 34 for converting AC energy from a generator 32 into DC energy and supplying it to the storage battery 3, and a rotation speed of the internal combustion engine 1 from the rotation sensor 6. And a control unit 36 for controlling the inverter circuit 34 according to the load state information, and the DC / DC converter 19 is connected to the power storage unit 3.

In the case of the third embodiment, since the generator 32 is connected to the rotary shaft of the internal combustion engine 1, the auxiliary operation mode can be set by the driver's operation input. The control operation is performed similarly to the auxiliary braking mode in the first embodiment. FIG. 6 is a flow chart showing the flow of control operation in the third embodiment of the present invention. In the case of the third embodiment of the present invention, the auxiliary braking is performed by the operation input during the normal running, but the control means 36 takes in the detection output from the detection means 10, and the detection output is loaded on the power take-out means (PTO) 20. If it indicates that they are connected, the current extraction from the generator 32 is prohibited.

In this way, the power take-out means (PTO) 20
Since power is not supplied from the generator 32 to the power storage means 3 when power is taken out from the engine, fluctuations in the load applied to the internal combustion engine 1 are reduced, and therefore power transmission from the power take-out means (PTO) 20 is performed. Is done smoothly.

[0030]

As described above, according to the present invention, a vehicle equipped with an auxiliary accelerating device and / or an auxiliary braking device is equipped with power take-out means (PTO), and its power is stable with little fluctuation. There is an effect that can be taken out in the state.

[Brief description of drawings]

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

FIG. 2 is a flowchart showing a flow of control operation in the first embodiment of the present invention.

FIG. 3 is a block diagram showing the configuration of a second embodiment of the present invention.

FIG. 4 is a flowchart showing a flow of control operation in the second embodiment of the present invention.

FIG. 5 is a block diagram showing the configuration of a third embodiment of the present invention.

FIG. 6 is a flowchart showing a flow of control operation in the third embodiment of the present invention.

[Explanation of symbols]

 1 Internal Combustion Engine 2 Cage Induction Machine 3 Storage Means 4, 24, 34 Inverter Circuit 5 Control Circuit 6 Rotation Sensor 7 Capacitor 10 Detection Means 16 Electronic Governor 17 Accelerator Sensor 18 Fuel Injection Pump 19 DC / DC Converter 20 Power Extraction Means (PTO ) 21 accelerator pedal 22 electronic governor control circuit 23 electric motor 26, 36 control means 32 generator

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. In an auxiliary acceleration braking device including an inverter circuit coupled to each other, and a control circuit that controls the inverter circuit according to information on the rotation speed and the load state of the internal combustion engine, a power take-out means is connected to the rotary shaft, It is provided with a detection means for electrically detecting that a load is connected to the power take-out means, and the control circuit is provided with a means for controlling the inverter circuit to an off mode by a detection output of the detection means. Auxiliary acceleration braking device. 2. An auxiliary accelerating device comprising an electric motor connected to a rotary shaft of an internal combustion engine, and a control means for supplying a current to the electric motor when the output torque of the internal combustion engine is insufficient, the auxiliary accelerating device being connected to the rotary shaft. And a detection means for electrically detecting that an output load is connected to the power extraction means, and the control means supplies the electric current to the electric motor by the detection output of the detection means. An auxiliary accelerating braking system including a prohibiting means. 3. An auxiliary braking device comprising: a generator connected to a rotary shaft of an internal combustion engine; and control means for extracting a current from the generator when the internal combustion engine is accelerated from a load side. And a detection means for electrically detecting that an output load is connected to the power extraction means, and the control means uses the detection output of the detection means to generate a current from the generator. An auxiliary accelerating braking device including means for prohibiting removal.