JPH0423107B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a starter control device for a vehicle, and particularly to a starter control device for a vehicle that switches the power supply voltage from a low voltage to a high voltage when starting an internal combustion engine, and applies a high voltage to the starter to operate it. It is related to the device.

Conventionally, there has been a device of this type as shown in FIG. In the diagram, 1 is rated at 24 volts DC,
It is an auxiliary rotation type starter (starting motor),
It is composed of a drive switch 2 that drives the starter 1 and a DC motor 9. The drive switch 2 is composed of a normally open main contact 3, a current coil 4, and a voltage coil 5. The current coil 4 is set to 0.12 ohm, and the voltage coil 5 is set to 1.8 ohm. Further, the main contact 3 includes a plunger 6, a movable contact 7 fixed to the plunger 6, and a pair of fixed contacts 8a and 8b with which the movable contact 7 comes into contact. The DC motor 9 has a field winding 1
0, brushes 11a, 11b, and this brush 1
Armature 12 energized by 1a and 11b
Consists of. Reference numeral 13 designates an auxiliary switch that controls the energization of the drive switch 2, and is composed of a main contact 14 and a solenoid coil 15 that drives the main contact 14. Furthermore, the main contact 14 is
It is composed of a plunger 16, a movable contact 17 fixed to the plunger 16, and a pair of fixed contacts 18a and 18b with which the movable contact 17 comes into contact. Reference numeral 19 denotes an auxiliary relay that controls the energization of the auxiliary switch 13. 20 is two in-vehicle batteries 21 each with a rated electromotive force of 12 volts DC.
This is an electromagnetic switch that switches a and 21b in series and parallel. This electromagnetic switch 20 includes a plunger 22, a first movable contact 23 fixed to the plunger 22, and a second movable contact 23 fixed to the plunger 22 and moved and energized in the same direction together with the first movable contact 23. Contacts 24, a pair of fixed contacts 25a and 25b that are in contact with the first movable contact 23 and constitute a normally closed contact, and a pair of fixed contacts 26a that are in contact with the second movable contact 24 and constitute a normally closed contact. and 26b, a pair of fixed contacts 27a and 27b that come into contact when the second movable contact is transferred and energized, and a solenoid coil 28 that excites the plunger 22 and energizes it.
Consisted of. This electromagnetic switch 20 is energized and energized by the auxiliary relay 19. The auxiliary relay 19 is a normally open contact, and when the key switch 29 is turned on, the auxiliary relay 19 is energized and closed by the vehicle battery 21a. 30 is an alternator (charging generator) that generates a rated voltage of 12 volts. 31 is an electrical load such as a headlight or a car air conditioner.

Next, the operation of the above-mentioned component device will be explained.
When the key switch 29 is turned on, the auxiliary relay 19
is energized and closed, and the solenoid coil 15 of the auxiliary switch and the solenoid coil 28 of the electromagnetic switch 20 are connected to the fixed contact 26b.
As a result, the fixed contact 27 is removed from the battery 21a.
a, 26a, through the second movable contact 24, and the solenoid coil 15 with a DC power supply voltage of 12 volts via the auxiliary relay 19 from the battery 21b.
and 28 are energized, the plunger 16 of the auxiliary switch 13 and the plunger 22 of the electromagnetic switch 20 are excited and attracted, and the normally open main contact 14 of the auxiliary switch 13 is closed, and the electromagnetic switch is 20 first and second movable contacts 23 and 24 are moved to positions 23a and 24a, respectively, and the on-vehicle batteries 21a and 21b are moved to positions 23a and 24a, respectively.
are switched from parallel to series by an electromagnetic switch 20. As a result, 24 volts of DC is applied to the fixed contact 26b. Therefore, the current coil 4 and voltage coil 5 of the drive switch 2 are energized through the closed auxiliary switch 13, the plunger 6 is excited and attracted, and the movable contact 7 comes into contact with the pair of fixed contacts 8a and 8b. come into contact with As a result, the normally open main contact 3 is closed, and the DC motor 9 is energized with 24 volts DC to generate rotational force. This rotational force is transferred to a pinion (not shown) which is transferred and energized by the plunger 6 and a shift lever (not shown).
The signal is transmitted to a ring gear (not shown) of an internal combustion engine (not shown) to start the internal combustion engine (not shown).

After the engine starts, when the key switch 29 is opened, the auxiliary relay 19 is energized and the connection between the fixed contact 26b and the solenoid coils 15, 28 is released, the main contact 14 of the auxiliary switch 13 is restored, and the electromagnetic The first and second movable contacts 23 and 24 of the switch 20 are respectively restored, the energization of the starter 1 is released, and the connection of the on-vehicle batteries 21a and 21b is switched from series to parallel. Furthermore, the pinion (not shown) is returned and transferred by the plunger 6 and the shift lever (not shown), and is disengaged from the ring gear (not shown) of the internal combustion engine (not shown).

When an internal combustion engine (not shown) is started, this internal combustion engine drives an alternator 30, which drives the on-vehicle batteries 2 connected in parallel.
1a and 21b are charged at a rated voltage of 12 volts DC. This charged power is consumed not only by the starter 1 but also by the electric load 31.

The conventional device is as described above, and after the auxiliary relay 19 and the auxiliary switch 13 are closed by turning on the key switch 29, the second switch of the electromagnetic switch 20 is closed.
The voltage at the fixed contact 26b changes from 12 to 0 volts during the period from when the movable contact 24 comes into contact with the fixed contacts 26a, 26b until it comes into contact with the fixed contacts 27a, 27b. Here, since both the auxiliary relay 19 and the auxiliary switch 13 are closed, the current and voltage coils 4 and 5 are first excited by the voltage of 12 volts at the fixed contact 26b, and the plunger 6 is about to be moved and energized. . However, since the voltage of the fixed contact 26b immediately becomes 0 volts, the auxiliary switch 13, which had been closed, momentarily becomes open, and the plunger 6
is transferred back. However, immediately after this, the voltage at the fixed contact 26b becomes 24 volts, so the plunger 6 is transferred and energized again, the drive switch 2 is closed, and the starter 1 is driven as described above.

In this way, after the auxiliary relay 19 and the auxiliary switch 13 are closed by turning on the key switch 29, the second movable contact 24 of the electromagnetic switch 20 changes from the state of contact with the fixed contacts 26a, 26b to the fixed contacts 27a, 27b. Fixed contact 2 until contact
Since the voltage of 6b changes from 12 to 0 volts, the auxiliary switch 13 becomes open for a moment, and the battery 21
A so-called contact chatter phenomenon occurs in which contacts a and 21b are connected in series and then closed again, and the drive switch 2 responds by chattering and the plunger 6
A shift lever (not shown), which responds by engaging with a cam, receives an impact load, and in the worst case, the shift lever may break.

In addition, as a circuit to eliminate the above-mentioned drawbacks,
The system shown in Figure 2 of Publication No. 48783 is known. In this system, when the start switch is turned on, power is supplied from one battery to energize the relay coil, and the two normally closed contacts are connected to each other. Kaisei and other 2
By closing each of the normally open contacts, the two
Switch the 12V battery from parallel to series connection,
It is set to a 24V high voltage power supply, and the excitation coil and main contact of the starter motor circuit are energized through one normally open contact with the 24V high voltage terminal voltage closed. The auxiliary switch is closed upon completion of switching the electromagnetic switch.

However, in FIG. 2 of this known Japanese Utility Model Publication No. 55-48783, a high voltage of 24V is applied to the main contacts of the starter motor circuit via the normally open contacts constituting the auxiliary switch. , a large current flows through the normally open contact, causing an arc to occur when the normally open contact closes or opens, significantly reducing the durability of the normally open contact, and the circuit wiring is also rated for high current. There were drawbacks such as:

In addition, the device shown in Figure 3 of Japanese Utility Model Publication No. 55-48783 provides a _B2 contact and an S contact at the ground of the C contact of the starter switch in order to eliminate the drawbacks shown in Figure 2 above. , the excitation coil of the starter motor circuit is energized via these _B2 contacts and S contact, and by connecting B contact and C contact in advance, the relay coil is energized and each relay contact is normally closed. Switch as if closing from the side to the normally open side,
After connecting two 12V batteries in series, connect the B contact, _B2 contact, and S contact, and apply a 24V high voltage to the excitation coil of the starter motor circuit and the main contact through one normally closed contact. It is designed to supply electricity.

However, even in the case shown in Fig. 3, it is necessary to provide the starter switch with a _B2 contact and an S contact, and it is also necessary to connect each of these contacts to the relay circuit and starter motor circuit, which are auxiliary switches. The structure and connection circuit become complicated, and even the one in Fig. 3 becomes complicated.
Since a high voltage of 24V is applied to the main contacts of the starter motor circuit through the closed and normally open contacts that constitute the auxiliary switch, a large current flows through the normally open contacts, causing the normally open contacts to change from closed to open. The durability of normally open contacts is significantly reduced, such as when arcing occurs when switching.
The circuit wiring also had the disadvantage of being rated for large currents.

This invention comprises a pair of switches, one of which is connected to the excitation coils 4 and 5 of the drive switch 2, and the other of which is directly connected to the main contact 3 and the terminals of the power sources 21a and 21b, respectively, and which are closed by the energization of the solenoid coil 28. An auxiliary switch 33 having fixed contacts 33a and 33b and configured to be used also within the electromagnetic switch 32
a, 33b, and 34 are provided, and the electromagnetic switch 32
Upon completion of switching, the auxiliary switch 33a,
By closing the pair of fixed contacts 33a, 33b, 33b, 34, the high voltage is applied to the excitation coils 4, 5, and the power sources 21a, 21
By applying the high voltage directly to the main contact 3 through the terminal b to close the drive switch 2, the chattering phenomenon that occurs in conventional devices is eliminated, and the durability and connection reliability of the auxiliary switch are improved. It is an object of the present invention to provide a starter control device for a vehicle that is highly safe and has a simple configuration.

An embodiment of the present invention will be described below with reference to FIG. In FIG. 2, reference numeral 32 denotes an electromagnetic switch, which has a pair of fixed contacts 33a and 33b in the electromagnetic switch 20 of the conventional device shown in FIG.
is additionally attached, and the first movable contact 34 is fixed to the plunger 22a. And, by the pair of fixed contacts 33a, 33b and the first movable contact 34,
This constitutes an auxiliary switch in this invention.
One fixed contact 33a is connected to the excitation coils 4 and 5 of the drive switch 2, and the other fixed contact 33b is directly connected to the main contact 3 and the positive terminal of the battery 21b. Note that the auxiliary switch 13 and auxiliary relay 19 installed in the conventional device shown in FIG. 1 are no longer necessary. The other configurations are the same as those of the conventional device, and their explanation will be omitted.

Next, the operation of the above device will be explained. When the key switch 29 is turned on, the solenoid coil 28
When the plunger 22a is energized and attracted, the first and second movable contacts 34 and 24 move to positions 34a and 24a indicated by dotted lines, and the pairs of fixed contacts 33a and 33b and 27a and 27b are connected, respectively. Batteries 21a and 21b are switched from parallel to series via a fixed contact 27a, a second movable contact 24, and a fixed contact 27b, and are connected at 24V via a fixed contact 33b, a first movable contact 34, and a fixed contact 33a. is applied to the current and voltage coils 4, 5 of the drive switch 2. This closes the normally open main contact 3, and the batteries 21a, 2 connected in series to the DC motor 9
1b and the starter 1 is driven. below,
An internal combustion engine (not shown) is started in the same manner as described for the conventional device shown in FIG.

The energization of the solenoid coil 28 that opens the key switch 29 is released, the plunger 22a is moved back by a coil spring (not shown), and the pair of fixed contacts 33a and 33b are opened. As a result, the drive switch 2 is opened and the pinion (not shown) is disengaged from the ring gear (not shown) of the internal combustion engine (not shown), and the DC motor 9 is deenergized and the starter 1 is activated. Stand still. Along with this, the fixed contacts 25a, 25b, and 26 of the electromagnetic switch 32
a and 26b are connected respectively, and the battery 21
a and 21b are connected in parallel, and are connected to an alternator 30 and an electric load 31 in the same way as in the conventional device shown in FIG.

As described above, in this embodiment, an auxiliary switch consisting of a pair of fixed contacts 33a, 33b and a first movable contact 34 is configured in the electromagnetic switch 32,
Upon completion of switching the electromagnetic switch 32, the auxiliary switch is closed and a high voltage is applied to the starter 1 to operate the starter 1, which eliminates the chattering phenomenon of the starter 1 and improves reliability.
A highly safe vehicle starter control device can be provided. In addition, auxiliary switch 13 and auxiliary relay 1
9 is not necessary, an inexpensive starter control device for a vehicle can be obtained.

Furthermore, a high voltage of 24V from the battery 21b is applied to the main contact 3 of the direct drive switch 2.
On the other hand, since the current is applied to the excitation coils 4 and 5 via the fixed contacts 33a and 33b of the auxiliary switch, the current applied to the fixed contacts 33a and 33b of the auxiliary switch is extremely low (the resistance value of the excitation coils 4 and 5 is large). Therefore, durability is good, and there is no need to take care to ensure that the circuit wiring can withstand large currents.

Furthermore, as shown in FIG. 3 of Japanese Utility Model Publication No. 55-48783, since there is no need to provide a special contact point to the starter switch, the structure of the starter switch is simple and the connection circuit is also simple.

The on-vehicle batteries 21a and 21b may have a voltage other than 12 volts DC, may be a DC power source other than the on-vehicle battery, and may be composed of three or more batteries.

As described above, the present invention includes an electromagnetic switch that receives power from a power source when a starting switch is turned on, energizes an electromagnetic coil, and switches the voltage of the power source from a low voltage to a high voltage. A drive switch has an excitation coil energized by the applied high voltage and a main contact, and drives a vehicle starter when the main contact is closed; one side is connected to the excitation coil of the drive switch and the other is the main contact. An auxiliary switch is provided in the electromagnetic switch and has a pair of fixed contacts that are directly connected to the terminals of the power source and are closed by the energization of the electromagnetic coil, and the auxiliary switch is configured to serve as a dual purpose in the electromagnetic switch, and the electromagnetic switch is switched. Upon completion of the operation, the pair of fixed contacts of the auxiliary switch are closed, thereby applying the high voltage to the excitation coil, and applying the high voltage directly to the main contact through the terminal of the power source to activate the drive switch. Since the starter is activated when the switch is closed, the chattering phenomenon of the starter is eliminated, and the current applied to the pair of fixed contacts of the auxiliary switch is extremely low, resulting in good durability of the auxiliary switch. Since it is simple, it becomes possible to obtain a highly reliable and safe starter control device for a vehicle with a simple configuration and at a low cost.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing a conventional starter control device for a vehicle, and FIG. 2 is a block diagram showing a starter control device according to an embodiment of the present invention. In the figure, 1...starter, 2...drive switch,
3... Main contact, 4... Current coil, 5... Current coil, 13... Auxiliary switch, 20... Electromagnetic switch, 21a, 21b... Vehicle battery, 24,
34...Movable contact, 32...Electromagnetic switch, 33
a, 33b...fixed contact, 29...key switch. In addition, in the figures, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Claims] 1. When the start switch 29 is turned on, the power source 21a,
Solenoid coil 28 receives power from 21b.
an electromagnetic switch 32 that energizes and switches the voltage of the power supplies 21a and 21b from low voltage to high voltage, excitation coils 4 and 5 that are energized by the high voltage applied via this electromagnetic switch 32, and main contacts. 3, which drives the vehicle starter 1 when the main contact 3 is closed;
Auxiliary switches 33a, 33 have a pair of fixed contacts 33a, 33b that are directly connected to terminals a, 21b, respectively, and are closed by the energization of the solenoid coil 28, and are configured to be used also in the electromagnetic switch 32.
3b, 34, when the pair of fixed contacts 33a, 33b of the auxiliary switches 33a, 33b, 34 are closed upon completion of switching of the electromagnetic switch 32, the high voltage is applied to the excitation coils 4, 5. At the same time, the high voltage is applied directly to the main contact 3 through the terminals of the power sources 21a and 21b to close the drive switch 2.