JPS58204977A - Two-battery wiring method for vehicle - Google Patents

Abstract

PURPOSE:To prevent power supply voltage drop, surge voltage, and noise by providing an exclusive battery for a microcomputer or an ignition unit, which requires stable electric current, in a manner that said battery is disconnected from another battery for a starting motor or an electric load. CONSTITUTION:When key-switches 5 and 5a are closed, a field coil 2 and an ignition coil 10 are electrified. And when an engine 11 rotates, an igniter 9 operates and the engine starts operation. Various informations form the engine 11 is entered in a microcomputer 12 from a sensor 13, and an actuator 14 operates to control the engine 11. The second battery 6a is charged by an electric power supply 100 like a solar battery, other than a generator, through a non- return diode 101. When the engine rotates, an armature coil 1 generates an AC output that is converted into DC by means of a rectifier 3. And a voltage regulator 4 regulates the current in the field coil 2 so that the first battery, too, can supply an electric load 8 with electric power, while keeping the terminal voltage constant.

Description

[Detailed description of the invention] This invention relates to a wiring system for 111 cars.

Conventionally, there has been a device of this type as shown in FIG.

In the figure, 1 is the armature filter, 2 is the armature filter 1
3 is a rectifier that converts the AC output of the armature coil 1 into DC; 4 is a rectifier that controls the voltage generated by the armature filter 1 to control the current flowing to the field filter 2; 5 is a first key switch, 6 is a first battery, 7 is a starter motor, 8 is an electric load, 9 is an igniter, 10 is an ignition coil, 11 is an engine, 12 is a A microcomputer controls the engine 11, 13 is a sensor, and 14 is an actuator.

The operation of the above configuration will be explained.

First, when the first key switch 5 is closed, the ignition filter 1
Current flows through the primary side of 0. And by the starting motor 7
When the +a valve 11 rotates, the igniter 9 operates and high pressure is generated on the secondary side of the ignition filter 10.The high pressure is supplied to the spark plug (not shown), the air-fuel mixture in the cylinder (not shown) explodes, and the engine starts. . When the engine 11 starts, an AC output is generated in the armature filter 1, and the rectifier 3
The first battery 6, electric load 8, igniter 9, ignition coil 10, while keeping the terminal voltage constant by controlling the voltage regulator 4 ÷ field current.
Power is supplied to t5 and microcomputer-2. Further, various information about the engine 11 is inputted to the microcomputer 2 by the sensor 13, and the actuator 14 is operated by the output from the microcomputer 2 to control the engine 11.

Conventional equipment is configured as described above, so it is difficult to reduce power supply voltage drop due to large current flowing to the starting motor during starting, surge voltage when electrical load is cut off, and noise generated from the generator. It has the disadvantage that it can affect the computer or igniter, causing it to malfunction or, in the worst case, being destroyed.

This invention was made in order to eliminate the drawbacks of the conventional technology as described in -1. A second battery dedicated to the microcomputer and ignition device (igniter and ignition coil) was newly installed, and this second battery By charging with a power source other than a generator, there is less voltage fluctuation □゛1...

The purpose is to provide a stable power supply that is free from the effects of surge voltage and noise.

An embodiment of the present invention will be described below with reference to FIG.

The same parts as in FIG. 1 are denoted by the same reference numerals, and detailed explanations of the configuration will be omitted to avoid duplication, but in FIG. A new battery 6a is installed separately, and a second key switch 5a that is interlocked with the first key switch 5 is connected to a circuit that connects the second battery 6a, the igniter 9, the ignition coil 10, and the microcomputer 12. They are connected in series, and furthermore, a power source 100 for charging the batteries 6a of the two power distributions 2 is provided in parallel. Note that 101 is a backflow prevention diode.

Next, the operation of this invention having the above-mentioned configuration will be explained. First and second key switches 5 and 5a
When is closed, current flows through the field coil 2 and also through the primary side of the ignition coil 10. Next, the starting electric motor W1
7, when the engine 11 rotates, the igniter 9 operates and high pressure is generated on the secondary side of the ignition filter 10, and this high pressure is supplied to the spark plug (not shown) and the air-fuel mixture in the cylinder (not shown) explodes. The engine 11 then starts. Various information of the engine 11 is inputted to the microcomputer 12 by the sensor 13, and further outputted from the microcomputer 12 by J.
:The reactuator 14 operates to control the engine 11. Here, the second battery 6a is connected to a backflow prevention 11-diode 10 by a power source 100 other than a generator such as a solar cell.
It is charged through 1. When the engine further rotates, an alternating current output is generated in the armature filter 1, which is converted to direct current by the rectifier 3, and then sent to the voltage regulator 4. By controlling the current in the field field 2, power is supplied to the first battery 6 and the electric load 8 while keeping the terminal voltage constant.

In the above embodiments, an engine control microcomputer is shown as the electronic device of the vehicle, but other electronic devices such as a travel control microcomputer, a travel status display microcomputer, an alarm device microcomputer, etc. A similar effect can be obtained. Also, -1-power distribution 2
In the above embodiment, a solar cell was shown as a power source for batch 'J6a, but in addition to this, a tongue thermoelectric element or a thermionic generator can be used to directly convert the heat of vehicle exhaust gas or cooling water into electrical energy. Furthermore, it is also possible to charge the battery using a piezoelectric element that can directly convert engine vibrations into electrical energy.

As described above, according to the present invention, the following excellent inventive effects can be obtained by newly installing a second battery for the microcomputer and the ignition device and adopting a two-battery wiring system.

Since the microcomputer and ignition device have a dedicated battery (stable power source) separate from the starting motor and other electrical loads, (1) Malfunctions of the microcomputer and igniter are reduced.

(2) The quality of the microcomputer and igniter is stabilized because the influence of electrical load shedding is eliminated.

(3) Engine startability is improved because there is no effect of voltage drop during starting.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram of a conventional device, and FIG. 2 is a circuit diagram showing an embodiment of the present invention. In the figure, 1 is an armature coil, 2 is a field coil, 3 is a rectifier, 4 is a voltage regulator, 5 is a first key switch, 5a is a second key switch, 6 is @1 battery, 6
a is a second battery, 7 is a starter motor, 8 is an electric load,
9 is an igniter, 10 is an ignition coil, 11 is an engine, 12
1 is a microcomputer, 13 is a sensor, 14 is an actuator, 100 is a power source, and 101 is a backflow prevention diode. In addition, in the figures, the same reference numerals indicate the same or corresponding parts. Agent Makoto Kuzuno - (1 person) 11 and □ 2 Procedural amendments (flags) Commissioner of the Japan Patent Office 1, Indication of case Patent Application No. 1987-90132 2,
Title of the invention Two-battery wiring system for vehicles 3, relationship with the amended case Patent applicant address 2-2-3 Marunouchi, Chiyoda-ku, Tokyo Name (601) Mitsubishi Electric Corporation Representative Jinhachibe Katayama 6. Subject of amendment (1) Engraving of the specification 7. Contents of amendment (1) Engrave the specification on a separate sheet. (However, there is no change in the contents) 8. Attached documents (1) Engraved specification 1 copy 1・α-.

Claims (4)

[Claims] (1) An armature filter that generates three-phase alternating current, a field filter that faces the armature coil, and a rectifier that converts the alternating current output of the armature coil into direct current; a generator having a voltage regulator that keeps the voltage constant by controlling the current flowing through the field coil; a first battery connected between the output terminals of the generator; and a first battery connected in parallel to the first battery. In a vehicle wiring system that has a microcomputer that controls the vehicle and displays the vehicle status according to the connected starting motor, electric load, ignition system, and vehicle status, a microcomputer that requires a stable current, A second battery separated from the first battery described in - is newly installed in the ignition device, and the second battery described above is installed.
A two-battery wiring system for a vehicle, characterized in that the battery is charged by a power source other than a generator. (2) The two-battery wiring system for a vehicle described in the scope (1) of Patent No. n/1, wherein the second battery is charged by a solar cell that can directly convert sunlight into electrical energy. (3) The vehicle according to claim (1), wherein the battery of the j-power distribution 2 is charged by a thermoelectric element or a thermionic generator that can directly convert the heat of vehicle exhaust gas or cooling water into electrical energy. 2-battery wiring system. (4) A two-battery wiring system for a vehicle according to claim (1), wherein the second battery is charged by a piezoelectric element that can directly convert engine vibrations into electrical energy.