KR20050007046A - System for preventing over-run in starter motor for automobile - Google Patents

Abstract

PURPOSE: A system for preventing overrun of a starting motor for a vehicle is provided to improve performance of the starting motor by restricting overrun of the staring motor from loss of automatic return function of the ignition key and preventing restarting from error of operation. CONSTITUTION: A starting system of a vehicle comprises a starting motor(30) generating torque for cranking an engine, a battery(10) supplying driving power of the starting motor, an ignition switch(20) applying power from the battery to the starting motor, and a starting relay(40). A battery charge warming lamp(50) alarms charge of the starting motor and the battery, and an alternator(60) controls the battery charge warning lamp. An L-terminal of the alternator is connected to a restarting preventing relay(70) to restrict power of the battery from being applied to the starting motor in starting the ignition switch by turning on and off according to the operation of the alternator.

Description

System for preventing over-run in starter motor for automobile}

The present invention relates to an overrun prevention system of a starting motor for a vehicle, and more particularly, a conventional starting method for driving a starting motor by configuring a starting relay has a problem in that an overrun phenomenon of the starting motor occurs at start-up. In this case, a normal close restart protection relay is configured in the start relay, so that the power generation voltage is applied to the "L" terminal of the alternator, and thus the restart prevention relay is energized. Normally open start relay prevents battery power from being applied, and automatically shuts off the battery power supplied to the starter motor before overrun. Of the starting motor for automobiles, which can prevent damage to the starting motor and lower durability. Moher relates to the protection system.

In general, starting the engine requires externally supplied forces for the first suction stroke and compression stroke, which is called a starter system, which includes a starter motor that transmits torque to the engine's flywheel. do.

One embodiment of a conventional starting system including a starting motor is schematically shown in FIG. 3.

As shown therein, the starting system includes a starting motor 30 for generating torque for engine cranking, a battery 10 for providing driving power for the starting motor 30, and a starting motor ( And an ignition switch 20, a start relay 40, and the like for applying power to the battery 10.

When the driver turns the ignition key to the start position IG and outputs a relay driving signal to operate the start relay 40 on, the power of the battery 10 is applied to the starter motor 30. When the supplied starting motor 30 starts to rotate, the rotational force of the starting motor 30 is transmitted to the flywheel of the engine (not shown), and the engine is started.

In order to start the engine, the driver should turn the ignition key to operate the ignition switch in the ignition position (IG) and then judge whether the ignition has been started, and if the ignition has been determined, the ignition switch is released. .

However, in the related art, since the power supply of the starting motor is only released after starting as described above, power may be supplied to the starting motor for a long time even after starting due to inexperienced driver operation.

In addition, when starting, the driver turns the ignition key to operate the ignition switch from the ON position to the ignition position and then releases the ignition key to return it back to the ON position by the spring reaction force of the key set. It can be locked in the starting position by using a homemade key.

This can over-run the starter motor and eventually cause permanent damage.

In addition, since the engine can not cut the power to the starting motor exactly at the time when the engine can rotate by magnetic force, the engine can drive the starting motor in reverse, and if the number increases, the durability of the starting motor is weakened.

In addition, if the starting motor is inadvertently driven while the engine is running, the starting motor may be damaged.

Therefore, the present invention has been invented to solve the above problems, the moment the driver turns the ignition key to start the engine to operate the ignition switch to the starting position, the generator voltage is applied to the "L" terminal of the alternator, After that, the battery voltage and the alternator voltage are coined, and the battery charge warning light goes out. The restart protection relay of the normal close method is connected to the alternator's "L" terminal and the start relay in series and then restarted. By preventing excitation of the starting relay connected to the protection relay, the battery power supplied to the starting motor is automatically cut off before the over-run of the starting motor, thereby preventing overrun of the starting motor due to inexperienced operation of the driver. As a result, the overrun of the starting motor for automobiles can prevent damage to the starting motor and lower durability. The purpose is to provide a prevention system.

1 is a circuit diagram showing an overrun prevention system of a starting motor for a vehicle according to the present invention;

2 is a block diagram showing a control method of an overrun prevention system of a starting motor for a vehicle according to the present invention;

3 is a circuit diagram schematically showing a general starting system including a conventional starting motor.

<Explanation of symbols for the main parts of the drawings>

10: battery 20: ignition switch

30: starting motor 40: starting relay

50: battery charge warning lamp 60: alternator

70: restart prevention relay

Hereinafter, the features of the present invention for achieving the above object are as follows.

The present invention provides a starter motor (30) for generating torque for engine cranking, a battery (10) for providing driving power for the starter motor (30), and a battery (10) to the starter motor (30). In the starting system comprising an ignition switch 20 and the start relay 40 for applying the power of,

Between the starter 30 and the "L" terminal of the alternator 60 having a control function of the battery charge warning light 50 to warn whether the battery 10 is charged, the power is turned on through the alternator 60. When the ignition switch 20 is turned off, the battery 10 is connected to a restart prevention relay 70 to prevent the power from being supplied to the starting motor 30.

In particular, the restart prevention relay 70 is characterized in that the relay made of a normal close (Nomal Close) method.

Hereinafter, the configuration of the present invention with reference to the accompanying drawings in detail.

1 is a circuit diagram showing an overrun prevention system of a starting motor for a vehicle according to the present invention, Figure 2 is a block diagram showing a control method of the overrun prevention system of a starting motor for a vehicle according to the present invention.

1 and 2, while the driver operates the ignition switch 20 to the start position IG by turning the ignition key to start the engine, the battery is generated by the generator voltage of the alternator 60. The charge warning lamp 50 is sequentially turned on and off, and thus, the normal close (NC) restart prevention relay 70 connected to the start relay 40 is excited to activate the battery 10. By not applying power, the power is not applied to the coil side, which is the exciting end of the normal open type start relay 40, so that the starting motor 30 before the over-run of the starting motor 30 is started. It is an overrun prevention system of the starting motor 30 for a vehicle that can automatically cut off the battery 10 supplied to the power supply 30.

Here, in the preferred embodiment according to the present invention, first, the driver turns the ignition key to ON (ON) by the relay drive signal when operating the start position (IG) of the ignition switch 20 to power the battery 10 The start relay 40 to be supplied to the start motor 30 has a circuit configuration as in the conventional configuration.

The start relay 40 is a normally open end, which is a normally open end, and determines whether the ignition switch 20 is energized on the coil side of the excitation end by turning the ignition switch 20 on and off, thereby Whether the power supply of the battery 10 is determined.

On the other hand, the "L" terminal of the alternator 60 to control the voltage so that the driver turns the ignition key to turn on the battery charge warning light 50 due to the generated voltage when operating the ON position of the ignition switch 20 The circuit 10 is provided between the “L” terminal of the alternator 60 and the start relay 40, and the battery 10 is supplied to the start motor 30 before the start motor 30 is overrun. The restart protection relay 70 of the normal close type which automatically cuts off power is connected.

At this time, the restart prevention relay 70 is a relay made of a normally closed (Nomla Close: NC) method, which is a normally closed end that maintains an on state of the power source by closing the excitation stage before the power is applied.

Hereinafter, the operation principle of the overrun prevention system of the starting motor for a vehicle according to the present invention will be described in detail.

First, when the driver turns the ignition key to the ON position (ON), the battery charge warning light 50 is turned on, and the "L" terminal of the alternator 60 is earthed.

At this time, the restart prevention relay 70 is in a non-operation state, and thus the start relay 40 applies the battery 10 power to the start motor 30 in an operable state.

Thereafter, the ignition switch 20 is positioned at the start position IG, and thus a relay driving signal is output, and when the starting motor 30 is driven, the power of the battery 10 is applied to the starting motor 30 as well. The generator voltage of the alternator 60 is coincided with the voltage of the battery 10 so that the battery charge warning lamp 50 is turned off.

Thereafter, the voltage of the battery 10 and the power generation voltage of the alternator 60 are coincided with each other. Thus, the power generation voltage of the alternator 60 excites the restart prevention relay 70 so that the start relay 40 Since power is not applied to the coil side, when the starting position of the ignition switch 20 is operated, the power of the battery 10 is not earthed through the restart prevention relay 70, and eventually the ignition switch 20 After the start of the coil), the coil side, which is the exciting end of the start relay 40, is turned off to automatically cut off the power supply of the battery 10 supplied to the starter motor 30 before the over-run of the starter motor 30. will be.

As described above, the restart prevention relay 70 in the overrun prevention system of the starting motor for a vehicle according to the present invention determines whether or not the energization of the coil side, which is the exciting end of the start relay 40, is operated when the ignition switch 20 is operated. The battery 10 is a means for allowing the power to be applied to the starting motor 30 through the start relay 40.

On the other hand, the voltage value of the automotive power supply with time changes before and after the automobile engine starts.

That is, before starting, the battery voltage value of the vehicle power source maintains the original voltage value 24V of the battery 10 at the on position of the ignition switch 20, and the battery value of the alternator 60 is 0V. (10) The battery charge warning light 50 lights up due to the voltage difference between the voltage and the voltage of the alternator 60.

Then, when the ignition switch 20 is in the start (IG) state, the generator voltage is applied to the "L" terminal of the alternator 60, and the battery 10 voltage and the coin charge charged at the same time as the start-up The battery charge warning light 50 is turned off.

At this time, while operating the ignition switch 20 to the start position and at the same time as the battery 10 power is applied to the starting motor 30, a large load is applied, the starting initial voltage value is sharply dropped.

Subsequently, the voltage value is repeated at regular intervals during engine cranking, and upon initial explosion of the engine, the load of the starting motor 30 is reduced and the voltage value temporarily increases.

As described above, the engine has a driving force due to the initial explosion, and when the explosion stroke is performed in each cylinder of the engine, the engine can be driven by magnetic force, and the alternator 60 starts generating power. (0V → 28V)

At this time, the alternator 60 starts to generate power and charges the battery 10. After the start, the alternator 60 maintains a voltage level higher than that of the initial battery 10 power supply. (24V → 28V)

Therefore, the restart prevention relay 70 does not earth the power of the battery 10 at the time when the battery charge warning light 50 is turned off as described above, so that the ignition switch after the ignition switch 20 is started. Since the power supply of the battery 10 through 20 is not applied to the starter motor 30, the overrun phenomenon of the starter motor 30 may be prevented.

As described above, according to the system for overrun prevention of the starting motor for a vehicle according to the present invention, the over-run phenomenon of the starting motor caused by the loss of the return function in which the starting key is automatically returned after the existing starting. It is possible to prevent, as well as to prevent the restart by the erroneous operation of the ignition switch has the effect of improving the performance of the starting motor.

Claims (1)

Starting motor 30 for generating torque for engine cranking, the battery 10 for providing the driving power of the starting motor 30, and the power of the battery 10 to the starting motor 30 In the starting system comprising an ignition switch 20, a start relay 40, etc. to be applied, Between the starter 30 and the "L" terminal of the alternator 60 having a control function of the battery charge warning light 50 to warn whether the battery 10 is charged, the power is turned on through the alternator 60. When the ignition switch 20 is turned off, the over-run prevention of the starting motor for a vehicle, comprising a circuit configured by connecting a restart prevention relay 70 to prevent the battery 10 from being applied to the starting motor 30. system.