JPH05116571A - Starting device for vehicle - Google Patents

Abstract

PURPOSE:To prevent an engine from becoming unable to be started because of a dead battery by utilizing the electric charge of a capacitor when the engine cannot be started by the battery alone, and warning that the charge of the battery has decreased. CONSTITUTION:A capacitor 4 of large capacity is connected to the terminal of a battery 1 via a constantly open relay R3 and, to start an engine, at first electricity is transmitted to an ignition circuit 2 and a starter 3 using only the power of the battery 1 for the test of starting. Next, rotation of the engine is checked by a rotation checking circuit 5 and when the engine cannot be started the capacitor 4 is charged and electricity is transmitted to the starter 3 using the electric charge of the capacitor 4 in addition to the battery power to start the engine and a dead display circuit 11 warns that the battery capacity is insufficient.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle starting device for driving an engine starting mechanism using a vehicle-mounted battery as a power source.

[0002]

2. Description of the Related Art Conventionally, a vehicle is equipped with a battery as a power source for an engine starter and other auxiliary equipment, and when starting the engine, a large current of, for example, about 100 to 200 A is supplied from the battery to the starter to start the engine. Is being done.

When the amount of electricity stored in the battery decreases, a large current cannot be supplied and the engine cannot be started. Therefore, a capacitor having a large electrostatic capacity is charged first, and the electric charge of the capacitor is supplied to the starter. Power supply device is Japanese Patent Laid-Open No. 2-1
No. 75350.

Further, in cold weather, it takes time for the vehicle to warm up even after the engine has started, so a vehicle start setting device for actuating a relay switch by a timer circuit is disclosed in JP-A-63-55363.

[0005]

According to the former proposal disclosed in the above-mentioned publication, if the charge of the capacitor is always used regardless of the amount of charge of the battery, the amount of charge of the battery will be almost zero. It will not be noticed until it disappears and the capacitor cannot be charged, and there is a possibility that the engine cannot be completely started.

The latter proposal is for the case of cold weather. When the temperature of the battery or the engine is lowered, even if the relay switch is operated by the timer due to the decrease of the capacity of the battery or the poor startability of the engine, It can be difficult to start.

The present invention has been made in view of the above problems, and its purpose is to start a vehicle by using a capacitor having a large electrostatic capacity and checking the state of a battery to start the engine. To provide a device.

[0008]

In order to achieve the above-mentioned object, according to the present invention, a vehicle starter in which electric power from a battery is supplied to a starter and an engine engaged with the starter is rotated to start the vehicle. In the device, a large-capacity capacitor connected to the battery to be charged, a start-up detecting means for detecting an engine start-up state, and a large-capacity capacitor according to a signal from the start-up detecting means when the starter is energized from the battery. There is provided a starting device for a vehicle, which includes an electric power supply unit that supplies electric charge to a starter.

[0009]

According to the present invention, the charge of the capacitor is not always used when starting the engine, the starting of the engine is checked, and when the battery cannot be started alone, the capacitor is used together and the decrease of the battery capacity is warned. It is possible to prevent inability to start due to complete lifting.

[0010]

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

FIG. 1 is a block diagram showing the configuration of an embodiment of a vehicle starting device according to the present invention.

In FIG. 1, reference numeral 1 denotes a battery, which serves as a power source for the ignition circuit 2 and the starter 3 of the engine. When the driver turns on the key switch A, the ignition circuit, the radio, etc. are energized, and the next key switch B When the switch is turned on, the relay R1 is closed by the actuation of the current through the resistor R that communicates with the coil RC of the relay R1, so that the starter 3 is driven and the engine is started.

Reference numeral 4 denotes a capacitor having a large electrostatic capacity, which is composed of, for example, an electric double layer capacitor. When the amount of electricity stored in the battery 1 is reduced and it is difficult to start the engine only by energizing the battery 1, the relay R3 is turned on. Capacitor 4
When the predetermined charge amount is reached, the charge of the capacitor 4 energizes the starter 3 to start the engine. Reference numeral 41 denotes a capacitor charge sensor, which is configured to detect a terminal voltage of the capacitor 4 and send a signal to the engine rotation check circuit 5 when a predetermined voltage is reached.

Then, the engine rotation check circuit 5 responds to the signal from the above-mentioned capacitor charge sensor 41 by a relay R.
2, a signal is sent to the R3, the battery rise display circuit 11 and the like to control on / off of the circuit and display. Further, the battery rise display circuit 11 is arranged at a place where the driver can always monitor and gives a warning about the state of the battery 1, and is reset by a reset signal.

FIG. 2 is a process flow chart for explaining the operation of the embodiment shown in FIG. 1, and the operation of this embodiment will be described with reference to the same figure.

First, in step 1, it is checked whether or not the key switch A has been operated, and if it is on, step 2
At step 3, the ignition circuit 2 is energized, and if the key switch B of the next stage is turned on at step 3, the circuit of the starter 3 is brought into contact, and the process proceeds from step 4 to 5 to judge the rotation of the engine.

If the engine is rotating, the flow is ended, but if it is not rotating, the process proceeds to step 6,
It is determined whether the charge signal from the capacitor charge sensor 41 is input to the rotation check circuit 5. Then, when the charging signal is not input, the process proceeds from step 7 to turn on the relay R2 to short-circuit the relay coil RC to open the relay R1 and disconnect the power supply to the starter 3.
Then, in step 8, the relay R3 is closed, and the electric power from the battery 1 with reduced storage amount is guided to the capacitor 4 for charging, and in step 9, the battery rise display circuit 11 is instructed to reduce the stored amount to the driver. To warn.

In the next step 10, the signal from the charge sensor 41 is checked. When the charge is completed, a charge completion signal is issued in step 12 and the process returns to step 6. In this case, since the charge of the capacitor 4 is sufficient for starting the starter, the process proceeds to step 11, the relay R2 is turned off to close the contact of the relay R1, and the charge of the capacitor 4 is relayed by the relay R2.
3 and R1 to supply the starter 3 to drive the starter 3 to start the engine.

FIG. 3 is a block diagram showing the configuration of another embodiment of the present invention, in which the same parts as those in the above-mentioned embodiment are designated by the same reference numerals.

Reference numeral 6 in the figure is a timer circuit, which starts its operation at a preset time and sends a start command to the relays Ra, Rb and the rotation check circuit 5 to start the engine.

Therefore, even if the manual key switches 1 and 2 are not operated at the set time, the relays Ra and Rb are closed by the timer circuit 6 so that the ignition circuit 2 and the starter 3 are energized and the rotation check circuit 5 is turned on. Check the rotation status of. Then, if the engine is rotating, the relay Rb is turned off by the coincidence signal, and the engine start is completed. However, if the battery 1 cannot be started due to a decrease in the amount of electricity stored, the rotation check circuit that has checked this outputs an OFF signal to the relay Rb to stop the energization of the starter 3 and also turns on the relay RC to turn on the battery. 1 and the capacitor 4 are connected to start charging of the capacitor 4. In this case, the battery rise display circuit 11 displays a warning.

When the charging of the capacitor 4 is completed,
The restart instruction is issued from the charging sensor 41 to the timer circuit 6, the energizing circuit is configured as described above, and the charge from the capacitor 4 is supplied to start the engine.

Although the present invention has been described with reference to the above embodiments, various modifications are possible within the scope of the gist of the present invention, and these modifications are not excluded from the scope of the present invention.

[0024]

According to the present invention as in the above embodiments,
When starting the engine, without constantly applying the charge of the charged capacitor together with the battery to the starter,
When the battery charge is reduced and the engine cannot be started with only the battery, the charge of the capacitor is used and the battery rise indication is displayed, so that the driver can grasp the state of the battery and completely disable the engine start. The effect of avoiding such a state occurs.

Further, according to the present invention, even in the case of automatic starting using the timer device, the operation is performed in the same manner as in the case of manual operation, so that there is an advantage that start failure due to battery exhaustion can be prevented beforehand.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of an embodiment of a vehicle starting device according to the present invention.

FIG. 2 is a process flow chart showing the operation of the embodiment.

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

[Explanation of symbols]

 1 ... Battery 3 ... Starter 4 ... Capacitor 5 ... Engine rotation check circuit 6 ... Timer circuit 11 ... Battery rise display circuit

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Satoshi Tozawa 8 Tsutana, Fujisawa City, Kanagawa Prefecture Isuzu Motors Co., Ltd. Fujisawa Plant (72) Inventor Tomonori Ogasawara 8th Shelf, Fujisawa City, Kanagawa Isuzu Motors Co., Ltd. (72) Inventor Keiichi Iida 8 Fujisawa, Kanagawa Prefecture Shelf shelf Isuzu Motors Co., Ltd. Fujisawa factory

Claims (4)

[Claims] 1. A starter is supplied with electric power from a battery,
In a vehicle starting device for rotating and starting an engine engaged with the starter, a large-capacity capacitor connected to the battery for charging, a start detecting means for detecting an engine starting state, and a starter from the battery. A starting device for a vehicle, comprising: a power supply unit that supplies a charge of a large-capacity capacitor to a starter in response to a signal from the start detection unit when energized. 2. The vehicle starter according to claim 1, wherein the power supply means issues a warning that the amount of stored electricity in the battery is low when the electric charge of the large-capacity capacitor is supplied. 3. The vehicle starting device according to claim 1 or 2, wherein said power supply means is activated when a timer device energizes the battery. 4. The starting device for a vehicle according to claim 1, wherein an electric double layer capacitor is adopted as the large capacity capacitor.