JPH05252602A - Starting system for motor vehicle - Google Patents

Abstract

PURPOSE:To prevent an accident from occurrence by a constitution wherein when an NFB is turned ON, an ignition key is turned ON, and a side brake is released, a buzzer is actuated by an output from an AND circuit to notify the neighbors of the fact and a motor vehicle is started at low speed through a soft start circuit. CONSTITUTION:An NFB is turned ON to apply voltage from a battery 2 onto a control unit CU4 and the armature of a motor 3 thus turning a relay 15 and a contact 16 ON. Power is also fed from the CU4 to an ignition key IK17. Contact 18 is turned ON upon release of side brake. When the IK17 is turned to start position, an AND circuit 6 receives three signals to produce an H level signal which turns a relay 19 and a contact 20 ON. Consequently, a buzzer 8 is actuated through a transistor Tr 7. Upon elapse of a predetermined time determined by a time constant circuit 9, the buzzer 8 stops and a switch 10 is turned ON. An accelerator pedal 11 is then stepped down to turn a main switch 14 ON through a soft start circuit 12 and an armature control circuit 13. According to the constitution, neighbors are notified the fact and the motor vehicle is safely started.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a starting system for an electric vehicle, and more particularly to a starting system for an electric vehicle in which safety is improved by automatically sounding a buzzer at the time of starting and performing a soft start. Is.

Electric vehicles prevent pollution caused by exhaust gas by using a battery or the like as an energy source without using fuel, and are being developed in various places for practical use.

In such an electric vehicle, there is a demand for improving the safety by giving a warning by automatically sounding a buzzer at the time of starting and performing a soft start. ..

[0004]

2. Description of the Related Art In a conventional electric vehicle, when a no-fuse circuit breaker (NFB) as a power source is turned on, a side brake is released, and an accelerator is depressed, the vehicle immediately starts and is ready to start. It is generally configured as follows.

[0005]

In the case of an electric vehicle, unlike a gasoline vehicle or a diesel vehicle, there is no state corresponding to idling and the motor noise is small, so that people around the vehicle often do not notice it when starting.

[0006] Therefore, there is a problem in that there is a possibility that a collision accident, a contact accident, or the like may occur because people around the vehicle do not pay attention even when the vehicle starts moving, and there is a great danger.

[0007] The present invention is intended to solve the problems of the prior art as described above.
The purpose of the present invention is to improve the safety of an electric vehicle by automatically sounding a buzzer for a fixed time and performing a soft start to eliminate such a risk in advance.

[0008]

According to the present invention, an NFB (1) for bringing a battery (2) into a connected state in an electric vehicle that runs by driving a motor (3) using a battery (2) as a power source. Is detected to generate a first signal, and an ignition key for making the motor (3) drivable is detected to generate a second signal to put the electric vehicle in a parked state. Release of the side brake is detected to generate a third signal, a logical product signal of these first, second, and third signals is generated, and an alarm device (8 ) Is activated, and when a predetermined time has elapsed, the alarm device is stopped and a signal from the accelerator circuit (11) for accelerating the electric vehicle is sent to the motor (3) via the soft start circuit (12). )
Is applied to the driving circuit (13).

[0009]

FIG. 3 is a flow chart for explaining the operation of the present invention. In the electric vehicle starting system of the present invention, the NFB is turned on as shown in FIG.
The ignition key is turned on. The side brakes are released. When the above three conditions are met, a buzzer sounds to notify that the electric vehicle has started. When the accelerator is depressed, the electric vehicle is soft-started by detecting the accelerator signal.

Therefore, according to the present invention, the buzzer automatically sounds at the time of start-up to inform the surrounding people that there is a possibility of starting, and at the time of start-up, a soft start causes a gradual slow start. I will start to
Since the surrounding people do not pay attention, the risk of causing a collision accident or a contact accident is reduced.

[0011]

1 shows a circuit configuration of an embodiment of the present invention, in which reference numeral 1 is a no-fuse circuit breaker (NFB) for connecting a battery, reference numeral 2 is shown.
Is a battery for running the electric vehicle, reference numeral 3 is a running motor for the electric vehicle, reference numeral 4 is a control unit for controlling the running of the electric vehicle, reference numeral 5 is a field coil of the motor, and reference numeral 6 is a logical product signal. AND circuit as means, reference numeral 7 is a transistor, reference numeral 8 is an alarm device such as a buzzer, reference numeral 9 is a time constant circuit, reference numeral 10 is an analog switch, reference numeral 1
Reference numeral 1 is an accelerator circuit for generating an accelerator signal, reference numeral 12 is a soft start circuit for soft starting the motor 3, reference numeral 13 is an armature control circuit as a motor driving circuit, and reference numeral 14 is an armature current of the motor 3. Main switch consisting of FET for controlling, reference numeral 15 is NFB
A relay (R) for detecting the input of 1; reference numeral 16 is a contact of the relay 15 as a means for generating a first signal;
Is an ignition key as a means for generating a second signal, reference numeral 18 is a side brake switch as a means for generating a third signal, reference numeral 19 is a relay (R) for detecting a high level output of the AND circuit 6, reference numeral 20 is relay 1
9 contacts.

In the circuit of FIG. 2, when NFB1 is turned on, the battery 2 is connected to the circuit. by this,
Power is supplied to the armature circuit of the motor 3 and the control unit 4, and the relay 15 operates. Further, the power supply is connected to the ignition key 17 from the control unit 4.

Next, when the side brake is returned, the side brake switch 18 is turned on. Ignition key 17
Is turned on to the start (IG) position, the contact 16 is turned on by the operation of the relay 15, so that the AND circuit 6 outputs a high level when three signals are input. As a result, the relay 19 operates and the contact 20 is turned on. Initially transistor 7 is turned on,
The alarm device 8 such as a buzzer (BZ) is energized to start ringing.

Since the base of the transistor 7 is connected to the output of the AND circuit 6 via the time constant circuit 9 consisting of the resistor R and the capacitor C, the transistor 7 is turned off after a lapse of a predetermined time and an alarm such as a buzzer is issued. Device 8 stops ringing. At the same time, the analog switch 10 is turned on.

When the accelerator is depressed for starting, an accelerator signal corresponding to the accelerator opening is output from the accelerator circuit 11 and is applied to the soft start circuit 12 via the analog switch 10. Thereby, the soft start circuit 12 follows the predetermined soft start characteristic.
A gradually increasing signal is generated to drive the armature control circuit 13.

The armature control circuit 13 turns on the main switch 14 formed by connecting a plurality of FETs in parallel, and the motor 3 is turned on. At the same time,
Since a field current is supplied from the control unit 4 to the field coil of the motor 3, the motor 3 starts rotating.

At this time, however, the current supply to the motor 3 is controlled by the soft start circuit 12.
Since the electric vehicle does not fully open immediately and the current gradually increases, the electric vehicle can perform a soft start in which the vehicle starts slowly from a low speed.

FIG. 2 explains the soft start operation, and shows the case where the accelerator opening is fully opened. At the time of soft start, the accelerator signal gain does not become 100% from the beginning even if the accelerator is fully open, and the time constant T determined by the time constant circuit 9 is T.
Accordingly, the accelerator signal gain gradually increases.

[0019]

As described above, according to the present invention, when the electric vehicle is started, a buzzer or the like can be caused to ring to notify people in the surrounding area in advance. Further, since the soft start is performed, it is possible to remarkably improve the safety at the time of starting.

[Brief description of drawings]

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

FIG. 2 is a diagram illustrating a soft start operation.

FIG. 3 is a flowchart explaining the operation of the present invention.

[Explanation of symbols]

 1 NFB 2 Battery 3 Motor 6 Means for Generating Signal of Logical Product 8 Alarm Device 11 Accelerator Circuit 12 Soft Start Circuit 13 Driving Circuit 15 Means for Generating First Signal 16 Means for Generating Second Signal 17 Third Means of generating signals

Claims (1)

[Claims] 1. An electric vehicle that is driven by driving a motor using a battery as a power source, and a means for detecting the input of NFB for bringing the battery into a connected state to generate a first signal, and the motor. A means for generating a second signal by detecting the input of an ignition key to bring the vehicle into a drivable state, and a release of a side brake to bring the electric vehicle into a parked state, and a third signal. Means and means for generating a signal of a logical product of the first, second, and third signals, and activate the alarm device by the signal of the logical product, and when the predetermined time has passed, the alarm A start of an electric vehicle characterized in that a signal from an accelerator circuit for accelerating the electric vehicle is applied to a drive circuit of the motor through a soft start circuit by stopping the operation of the device. system.