JPH06255402A - Braking of internal combustion engine and auxiliary power arrangement - Google Patents

Abstract

PURPOSE:To supply the irreducible minimum of power supply to an emergency power supply terminal by providing an overcurrent breaker connected to the terminal of a storage battery in series and a relay circuit for connecting a terminal voltage of a part of cells of a storage battery to an emergency power supply terminal by interlocking with this overcurrent breaker, when the overcurrent breaker turns into an open condition. CONSTITUTION:When overcurrent flows from the high voltage circuit of a storage battery due to unexpected failure, the overcurrent breaking switch 21a of an overcurrent breaker 21 automatically turns into an open condition so as to break the power supply from the storage battery. At the same time, a low-voltage power supply connection switch 21b is set into a closed condition by interlocking with action of the overcurrent breaking switch 21a. When the low-voltage power supply connection switch 21b turns into the closed condition, terminal voltage from a part of cells equivalent to voltage 24V of a storage battery is applied to the coil 24a of a relay circuit 24. Thus relay switches 24b and 24c are set into closed conditions and the minimum 24V power supply necessary for vehicle operation is supplied to an emergency power supply terminal 23 of a distributing board 26.

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. 7 (International Application No. PCT / JP / 00157) relates to an improvement of an electric braking and auxiliary accelerator for an automobile. The invention is a device suitable for mounting on a motor vehicle with auxiliary acceleration and auxiliary braking devices manufactured and sold by the applicant under the name HIMR.

[0003]

2. Description of the Related Art The applicant of the present application is the international publication WO88 /
0617 (International Application No. PCT / JP / 00157) discloses an electric braking and auxiliary accelerator for a vehicle. As shown in FIG. 3, this device has a cage induction machine 2 whose rotor is directly connected to an internal combustion engine 1, a storage battery 3 in which a large number of cells are connected in series, and a DC voltage of the storage battery 3 AC induction motor 2 is converted into an AC voltage having a frequency suitable for inducing a rotating magnetic field having a rotation speed lower than the shaft rotation speed, and the AC voltage is supplied to the squirrel cage induction machine 2. An inverter circuit 4 for converting electric power into DC power 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 are provided. The inverter control circuit 5 includes means for generating a control command by the driver according to the driving of the automobile.

Further, a rotation sensor 6 is attached to the internal combustion engine, a signal from the rotation sensor 6 is given to the inverter control circuit 5, and further information on the charging state of the storage battery 3 is inputted.

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.

Further, the storage battery 3 and the semiconductor switch circuit 12 are connected to a detection circuit 13 for detecting the output voltage of the inverter circuit 4, and the resistor 11 is provided with a current detector 15 for detecting a change in current. This current detector 15
The semiconductor switch circuit 12 according to the detection signal.
A switch control circuit 14 for controlling the switch is connected. The detection circuit 13 is connected to the switch control circuit 14.

This device is mounted in an automobile, and when braking the automobile, the energy generated by the braking is collected as electric energy and stored, and when the automobile accelerates, the stored electric energy is converted into mechanical energy, and the axle is The auxiliary power is applied to the driving internal combustion engine.

That is, the inverter control circuit 5 gives the squirrel-cage induction machine 2 a rotating magnetic field at a speed exceeding the rotation speed of the internal-combustion engine 1 in the acceleration mode in which the squirrel-cage induction machine 2 is used as an auxiliary power unit of the internal-combustion engine 1. , Cage type induction machine 2 internal combustion engine 1
In the deceleration mode in which the braking device is used, it includes means for controlling the inverter circuit 4 so as to give the squirrel cage induction machine 2 a rotating magnetic field having a speed lower than the rotation speed of the internal combustion engine 1. Further, the inverter circuit 4 provides the DC output of the electric energy stored in the storage battery 3 to the squirrel cage induction machine 2 as a polyphase AC output in the acceleration mode, and outputs the dc output of the polyphase AC output energy of the squirrel cage induction machine 2 in the deceleration mode. It includes circuit means for providing the storage battery 3 as an output.

The storage battery 3 of such a conventional device has a structure in which a large number of cells corresponding to the rated voltage on the DC side of the inverter circuit 4 are connected in series.

[0010]

By the way, since the terminal voltage of this storage battery practically exceeds 300 V, if insulation failure or leakage occurs due to some unexpected failure,
Since an overcurrent may flow to the failure point and the failure may spread, when a current exceeding a predetermined value is detected in the storage battery to prevent this, the high voltage of the storage battery is automatically generated as shown in FIG. An overcurrent breaker 20 for breaking the circuit has been installed in series with the terminals of the storage battery of this device. However, in this device, if the overcurrent breaker 20 operates and the connection of the storage battery 3 is cut off, all the power supplies to this vehicle will be stopped. When the power supply is stopped, all the devices related to the operation such as the control circuit of the internal combustion engine, the control circuit of the transmission and the clutch, the headlight, etc. are stopped, and the operation of the vehicle cannot be continued.

The present invention has been made under such a background, and even if the overcurrent breaker of the high voltage circuit of the storage battery operates, the minimum necessary power supply is supplied to the emergency power supply terminal. , It is an object of the present invention to provide a device that ensures the safety of the device and does not cause a road failure of a vehicle.

[0012]

DISCLOSURE OF THE INVENTION The present invention relates to a squirrel cage induction machine connected to a rotary shaft of an internal combustion engine, a storage battery in which a large number of cells are connected in series, and a multi-phase AC circuit of the squirrel cage induction machine. In an internal combustion engine braking and auxiliary power unit including an inverter circuit for bidirectionally converting and coupling electric energy with a DC circuit of the storage battery, and a control circuit for controlling the inverter circuit, a series connection to a terminal of the storage battery And an overcurrent circuit breaker connected to the relay, which, when the overcurrent circuit breaker is opened, connects the terminal voltage of some cells of the storage battery to the emergency power supply terminal in cooperation with the overcurrent circuit breaker. And a circuit.

The rated voltage of the emergency power terminal is equal to the rated terminal voltage of a standard automobile (24V for large vehicles, 12V for small vehicles), and the emergency power terminal is connected to various loads of the vehicle through the backflow prevention diode. It is desirable to be connected.

[0014]

When an overcurrent flows from the high voltage circuit of the storage battery due to an unexpected failure, the overcurrent breaker operates to shut off the high voltage circuit. The relay circuit operates in conjunction with this breaking operation to connect the terminal voltage of some cells of the storage battery to the emergency power supply terminal.

As a result, even if the power supply from the high voltage circuit is stopped, the minimum necessary power supply can be supplied to the emergency power supply terminal, and the safety of the device can be ensured.
Since the operation of the internal combustion engine can be continued, the automobile can be quickly moved from the road to a place where it does not obstruct the traffic.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an apparatus of an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing the overall configuration of the apparatus of the present invention, and FIG. 2 is a diagram showing the configuration of the main parts of the apparatus of the present invention.

The apparatus according to the embodiment of the present invention includes a cage induction machine 2 connected to a rotary shaft of an internal combustion engine 1, a storage battery 3 in which a large number of cells are connected in series, and a multiphase AC circuit of the cage induction machine 2. An inverter circuit 4 for bidirectionally converting and coupling electric energy with a DC circuit of the storage battery 3, an inverter control circuit 5 for controlling the inverter circuit 4, a rotational speed of the internal combustion engine 1 and an output thereof detected by an inverter. A rotation sensor 6 for sending to the control circuit 5, a capacitor 7 and a semiconductor switch circuit 12 connected to the output side of the inverter circuit 4,
Resistor 11 connected to this semiconductor switch circuit 12
And a detection circuit 1 for detecting the output voltage of the inverter circuit 4.
3, a switch control circuit 14 that controls the semiconductor switch circuit 12, and a current detector 15 that detects a current change in the resistor 11. Further, as a feature of the present invention, an overcurrent breaker 21 connected in series to a terminal of the storage battery 3, and when the overcurrent breaker 21 is in an open state, the storage battery operates in conjunction with the overcurrent breaker 21. A relay circuit 24 that connects the terminal voltage of some cells of the battery 3 to the emergency power supply terminal 23 in the distribution board 26, and a DC / DC converter 28 that converts the high voltage (300V) of the storage battery 3 into a low voltage (24V). And the emergency power supply terminal 23 has a standard rated voltage of an automobile (24 V for large vehicles, 12 V for small vehicles).
And is connected to various loads of the vehicle through the backflow prevention diode 25.

In the overcurrent breaker 21, an overcurrent cutoff switch 21a that automatically opens when an overcurrent flows and shuts off the power supply at high speed, and the overcurrent cutoff switch 21a opens. It includes a low-voltage power supply connection switch 21b that supplies a low-voltage (24V) power supply to the relay circuit 24 when the relay circuit 24 is closed in conjunction with the above.

Next, the operation of the apparatus of the present invention thus constructed will be described.

When an overcurrent flows from the high voltage circuit of the storage battery 3 due to an unexpected failure, the overcurrent cutoff switch 21a of the overcurrent circuit breaker 21 is automatically opened and the power supply from the storage battery 3 is cut off. At the same time, this overcurrent cutoff switch 21
The low-voltage power supply connection switch 21b is set to the closed state in conjunction with the operation of a.

When the low-voltage power supply connection switch 21b is closed, a terminal voltage from a partial cell corresponding to the voltage 24V of the storage battery 3 is added to the coil 24a of the relay circuit 24. Thereby, the relay switches 24b and 24c
Is set to the closed state, and the minimum 2
The 4V power supply is supplied to the emergency power supply terminal 23 of the distribution board 26.

From the emergency power terminal 23 of the distribution board 26, a control circuit for the internal combustion engine, a control circuit for the transmission and the clutch,
The supply route of 24V power supply to the circuits required for vehicle operation such as hazard lamps, parking lamps, headlights, etc. is branched, and power is immediately supplied to these circuits and the vehicle can run. Put in a state.

The distribution board 26 and the power supply paths to various devices other than the minimum circuit required for vehicle operation are connected through a backflow prevention diode 25. Therefore, the supply of the 24V power supplied to the emergency power supply terminal 23 to the circuit other than the distribution board 26 is blocked. In an emergency, power is supplied only from some cells of the storage battery 3, so that the storage battery 3 has an uneven charging capacity, but this can be minimized.

When the overcurrent breaker 21 operates, 24V power is supplied to the alarm lamp 27 arranged in the driver's seat, and the lighting of the alarm lamp 27 causes an emergency state at present and a state in which the emergency state can be avoided. It is displayed and the driver is notified.

When the overcurrent breaker 21 is normal and the low-voltage power supply connection switch 21b has a short circuit failure, the alarm lamp 27 lights up to inform the driver of the failure of the relay circuit 24.

[0026]

As described above, according to the present invention, when the overcurrent flows from the high voltage circuit of the storage battery due to an unexpected failure and the overcurrent breaker operates to stop the power supply, the minimum power supply required. Can be supplied to the emergency power supply terminal, which can ensure the safety of the device and can move the vehicle from the road to a place where it does not obstruct traffic.

[Brief description of drawings]

FIG. 1 is a block diagram showing the overall configuration of an apparatus according to an embodiment of the present invention.

FIG. 2 is a diagram showing a configuration of a main part relating to the apparatus of the embodiment of the present invention.

FIG. 3 is a block diagram showing an overall configuration of a conventional device.

FIG. 4 is a diagram showing a configuration of a main part of a conventional device.

[Explanation of symbols]

 1 Internal Combustion Engine 2 Cage Induction Machine 3 Storage Battery 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 20, 21 Overcurrent Breaker 21a Overcurrent Breaker switch 21b Low-voltage power supply connection switch 22 DC / DC converter 23 Emergency power supply terminal 24 Relay circuit 24a Coil 24b, 24c Relay switch 25 Backflow prevention diode 26 Distribution board 27 Alarm lamp 28 DC / DC converter

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification number Internal reference number FI Technical indication location H02J 9/06 503 A 4235-5G (72) Inventor Takeshi Hinodai, Hino City, Tokyo 3-chome 1 Address 1 inside Hino Motors Ltd.

Claims (2)

[Claims] 1. A squirrel cage induction machine connected to a rotary shaft of an internal combustion engine, a storage battery in which a large number of cells are connected in series, a multi-phase AC circuit of the squirrel cage induction machine, and a DC circuit of the storage battery. In an internal combustion engine braking and auxiliary power unit including an inverter circuit for converting and coupling electric energy in the opposite direction, and a control circuit for controlling the inverter circuit, an overcurrent breaker connected in series to a terminal of the storage battery. And a relay circuit for connecting the terminal voltage of a part of the cells of the storage battery to the emergency power supply terminal when the overcurrent breaker is opened. Brake and auxiliary power unit for internal combustion engine. 2. The emergency power terminal has a rated voltage equal to the standard terminal voltage of a standard vehicle (24V for large vehicles, 12V for small vehicles), and the emergency power terminal is connected to various types of vehicles through a backflow prevention diode. The braking and auxiliary power unit of the internal combustion engine according to claim 1, which is connected to a load.