JPH02264154A - Charging discharging device for vehicle - Google Patents

Abstract

PURPOSE:To high-efficiently utilize a power generated through recovery of solar energy by providing an energizing means which feeds the charge of a capacitor to a starter after a high capacity capacitor storing a recovery power and a starter are energized by a battery. CONSTITUTION:When, during the starting of an engine, a key switch 3 is rotated to a position ST, a motor 21 is energized through a diode 8 and a closed main contact 23 by a battery 4. A motor 21 is started to run to push a pinion gear, which is engaged with the ring gear of a crank. When a capacitor 5 is connected to a terminal (b) of a starter 2 through a contact 62 of a relay 6, the charge of the capacitor 5 charged with recovered electric energy is instantaneously applied on the motor 21 at an excellent timing. In which case, a crank shaft forcibly engaged with a gear is driven thereby togetherwith a power from the battery 4 to start an engine. After the starting of the engine, as a result of the switch 3 being returned to a position IG, a current to a coil (h) and the relay 6 is disconnected, contacts 23 and 62 are restored to their original positions, and an engine 1 is run.

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a vehicle charging/discharging device that attempts to recover and efficiently utilize solar energy, exhaust energy, running energy during braking, etc. (conventional). In recent years, advances in semiconductor production technology have made it easier to produce solar cells by hand, making it possible to convert solar energy into electrical energy easily and efficiently.

On the other hand, in vehicles, a generator is connected to the rotating shaft of the engine, and during braking the output from the generator is led to the battery to charge it, or the generator is directly connected to a turbine driven by exhaust energy. Various attempts have been made to charge batteries using the output of this generator.

Utility Model Application Publication No. 63-162973 proposes a preliminary starting device for an automobile engine that charges a capacitor by attaching a solar cell to the surface of the vehicle body and supplies this charged power to the engine starting circuit to start the engine. has been disclosed.

(Problem to be solved by the invention) By the way, the batteries installed in vehicles are usually lead batteries, and as mentioned above, it is difficult to efficiently recover driving energy during braking of the vehicle and recover exhaust energy. Even if the battery is charged in this way, the power efficiency will remain at around 80%, which is the original power efficiency of a lead-acid battery, during charging and discharging cycles.

In addition, in the latter proposal disclosed in the above-mentioned publication, when the charge stored in the capacitor is energized to a normal engine starting circuit, the magnetic switch is first activated and its main contact is closed, and then the energization is applied. This drives the starter motor and rotates the engine. Therefore, the charge in the capacitor is first spent on the attractive force of the coil of the magnetic switch, and then is supplied to the starter motor, which requires a large amount of power. , depending on the state of charge of the capacitor, this becomes an inefficient form of discharge.
There is a risk that the stored charge will be insufficient and it will be difficult to start the engine.

The present invention has been made in view of these problems,
The purpose is to provide a charging/discharging device for a vehicle that efficiently utilizes electric power obtained by recovering solar energy and energy generated during braking of a vehicle.

(Means for Solving the Problems) According to the present invention, in a charging/discharging device for a vehicle that recovers solar energy, exhaust energy, etc., stores it as electric power, and supplies it to a starter to start the engine, the recovered electric power is A charging/discharging device for a vehicle is provided, which includes a large-capacity capacitor for storing , and energizing means for supplying the charge of the capacitor to the starter after energizing the starter from a battery.

(Function) In the present invention, electric power obtained by recovering solar energy, exhaust energy, etc. is stored in a large-capacity capacitor, and when starting the engine, electric power from the battery is first supplied to the starter to rotate the motor. When the ion meshes with the gear on the crankshaft, the relay contact is closed and the electric charge stored in the capacitor is supplied to the starter through this contact, making the starter more powerful along with the power from the battery. Rotate and drive to start the engine.

(Example) Next, an example of the present invention will be described in detail using the drawings.

FIG. 1 is a block circuit diagram showing one embodiment of the present invention, and FIG.
The figure is a schematic diagram of the energy recovery mechanism used in this example.

In FIG. 2, reference numeral 1 denotes an engine, and its exhaust pipe 11 is equipped with a turbine 12 that is driven by exhaust gas energy.
3 are coupled and configured to convert exhaust gas energy into electrical energy. And AC generator 1
The output from 3 is connected to a rectifier circuit 14, where it is converted to DC power and charged to a large capacity capacitor, which will be described later.

15 is a DC generator, which is connected to the rotating shaft of the engine 1 and converts the running energy of the vehicle during braking into electrical energy and recovers it, and closes the circuit during braking when the engine is reversely driven by the running energy. Control circuit 1
6 to charge a large capacity capacitor.

Next, in FIG. 1, reference numeral 2 denotes a starter, which has a well-known series-type starting motor 21 and a magnet switch 22, and the magnet switch 22 includes a pull-in coil p and a holding coil h. and,
These coils p.

When the terminal C of the main contact 23 is energized, the main contact 23 is closed by its attractive force, and the motor 21 is driven by the power supplied to the terminal connected to the main contact 23.

Reference numeral 3 is a key switch, which is a switch that supplies power from the battery 4 to various parts of the vehicle.For example, the AC position supplies power to the radio while the engine is stopped, the IG position supplies power to the ignition system, and the ST position allows power to be started. This is a switch that is rotated to three contact positions.

Reference numeral 5 denotes a large-capacity capacitor, which is a large-scale electric double layer capacitor used in memory backup power supplies of electronic devices, and has a capacitance of 100 F (Farad) or more, for example. One terminal is grounded, but the child terminals are connected to the rectifier circuit 14 and the control circuit 1.
6 etc. through diodes, and are charged by exhaust gas energy and running energy during braking, and are also connected to be charged by the output from a solar cell (not shown) placed on the top of the vehicle body. There is.

Reference numeral 6 denotes an electromagnetic relay, which has an electromagnetic coil 61 and a contact 62. When the terminal C of the starter 2 is energized, the main contact 23 is closed, and when the electromagnetic coil 61 is also energized via the coil p, the contact 62 is closed. It is something that can be done. The electric charge stored in the capacitor 5 via the contact 62 is then energized from the terminal of the starter 2 to the main contact 23 to the motor 21, which rotates the engine in synchronization with the timing when the pinion gear meshes with the crank gear. and is configured to start the engine.

7 is a diode of a unidirectional element, and a capacitor 5
is connected between the child terminal of the battery 4 and the child terminal of the battery 4. Then, the capacitor 5 charged by various types of recovered energy is sufficiently charged, and the terminal voltage of the capacitor 5 is increased to the battery 4.
When the voltage becomes higher than the terminal voltage of , the voltage flows into the battery 4 side through the diode 7 to charge the battery 4 as well. Note that normal charging of the battery 4 is performed by a well-known alternator (not shown).

8 is also a diode, which is connected between the child terminal of the battery 4 and the terminal of the starter 2, and when the key switch 3 is operated to activate the magnetic switch 22 and the main contact 23 is closed, the voltage from the battery 4 is A current is passed through the motor 21 to powerfully drive the motor 21 along with the current from the capacitor 5. In particular, the engine is started by energizing with stamina by supplementing the operation caused by the initial strong instantaneous discharge of the capacitor 5. let

In addition, 91 is a solar energy terminal, 92 is an exhaust energy terminal, 93 is a brake energy terminal,
The aforementioned solar cell, rectifier circuit 14, and control circuit 16, respectively.
It is connected to the. Each of these terminals 91 is normally
, 92, 93 as electrical energy is stored in the capacitor 5 via the respective diodes.

Next, the operation of this embodiment configured as described above will be explained.

When the key switch 3 is rotated to position 37 when starting the engine, current from the battery 4 is applied to the coils p and h via the terminal C of the starter 2, and the main contact 23 of the magnetic switch 22 is connected. , the coil 61 of the relay 6 is energized via the coil p, and its contact 62 is brought into contact.

For this reason, the motor 21 is first energized from the battery 4 via the diode 8 and the closed main contact 23, and the motor 21 begins to rotate, pushing out the pinion gear and meshing with the ring gear of the crank. .

Then, the capacitor 5 is connected to the terminal of the starter 2 via the contact 62 of the relay 6, so that the electric charge of the capacitor 5 charged with the recovered electrical energy is instantaneously applied to the motor 21 in a well-timed manner. The engine is started by powerfully driving the crankshaft with engaged gears together with the electric power from the battery 4.

After starting such an engine, turn key switch 3 to 37.
By returning from the position and operating it to the 10th position, the holding coil h of the magnetic switch 22 and the relay 6
The current to the main contact 23 and the contact 62 are opened and restored, and the ignition system continues to be energized, allowing the engine 1 to operate.

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

(Effects of the Invention) According to the present invention, a large-capacity capacitor is charged with electrical energy obtained by recovering solar energy, exhaust energy, and running energy during braking, and when the engine is started, the charge of the capacitor and the battery are combined. The starter motor is driven by the electric power, and since the electric power is supplied from the capacitor at the same time as the initial torque required to rotate the crankshaft, it creates a strong driving force and ensures reliable engine starting. This has the advantage that it is compatible with the discharge characteristics of the capacitor and allows for efficient use of charge.

Further, according to the present invention, the electrician energy recovered from each energy is stored in a capacitor with good charging and discharging efficiency without being stored in a battery, so that the effect of improving energy recovery efficiency can be obtained.

Further, according to the present invention, since it is not necessary to supply a large current to the starter by the battery alone, a battery having a smaller capacity than the conventional one is sufficient, and there is an advantage that the cost is reduced.

[Brief explanation of drawings]

FIG. 1 is a block circuit diagram showing one embodiment of the present invention, and FIG.
The figure is a schematic diagram of the energy recovery mechanism used in this example. 1... Engine, 2... Starter, 4... Battery, 5... Capacitor, 6... Relay, 11...
1 trachea, 13...AC generator, 15...DC generator.

Claims (2)

[Claims] (1) In a vehicle charging/discharging device that collects solar energy, exhaust energy, etc., stores it as electricity, and supplies it to a starter to start the engine, a large-capacity capacitor that stores the recovered electricity and a battery installed in the starter are used. A charging/discharging device for a vehicle, comprising: energizing means for supplying the charge of the capacitor to the starter after energizing. (2) The charging/discharging device for a vehicle according to claim (1), wherein the energizing means is a relay having a contact that becomes a closed circuit after the gear of the starter and the driven gear of the engine are engaged.