JPH07123512A - Automobile with auxiliary motor function - Google Patents

Abstract

PURPOSE:To provide an automobile in which the exhaust gas can be reduced without modifying a conventional automobile significantly by rotating a motor of conventional alternator size with electric energy thereby assisting the rotational operation of an engine. CONSTITUTION:The rotor of a generator 4 driven through an engine 1 is rotated through an accumulating means thus assisting the rotation of the engine 1. Since the rotation of the engine 1 is assisted through the rotation of the rotor of the generator 4 when a vehicle is running or stopping, discharge of exhaust gas can be reduced significantly as compared with a conventional system.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fuel type vehicle mainly using gasoline, light oil or the like as a fuel, in which a generator connected to an engine is rotated by electric energy.

[0002]

2. Description of the Related Art Conventionally, in a fuel type vehicle that mainly uses gasoline, light oil or the like as a fuel, the main configuration of the engine system SO is, for example, as shown in FIG. 6, a pulley P1 on a crankshaft CR of an engine EN. On the other hand, the pulley P2 is also attached to the rotor (rotor) of the alternator AC, and both pulleys are connected by the belt BE. Further, the alternator AC is electrically connected to the storage battery BT mainly via a regulator RE that performs voltage adjustment. With such a configuration, the engine E
The alternator AC is generated by the rotation of the crankshaft CR of N to generate the electric energy required to drive the electric unit provided in the vehicle, and the electric energy is stored in the storage battery BT.

A hybrid vehicle generally called, for example, is of a type in which a motor is driven by electric power generated by an internal combustion engine to drive the vehicle, or an internal combustion engine and a motor are used in combination. There is a type that travels by itself.

[0004]

However, in the above-mentioned fuel type automobile that uses gasoline, light oil, or the like as fuel, a large amount of exhaust gas is emitted when the vehicle is running or when the engine is running at no load such as idling. In recent years, with increasing interest in the global environment, it has been important to reduce the adverse effects of exhaust gas emitted by this type of vehicle, but conventionally, in order to suppress the emission of such exhaust gas as much as possible, Only measures to improve the combustion efficiency or reduce the weight of the vehicle body can be taken.

Further, in the above-described hybrid vehicle, it is necessary to use a heavy motor and a storage battery for driving, and an internal combustion engine and the like having a heavier weight are also required, so that the weight of the entire vehicle becomes enormous. The effect of reducing exhaust gas was also slight.

[0006]

[Objective] Therefore, in order to solve the above-mentioned problems, the present invention significantly changes the structure of a conventional automobile by rotating a conventional alternator-sized motor with electric energy and electrically assisting the rotational operation of the engine. It is an object of the present invention to provide an automobile that can reduce the amount of exhaust gas.

[0007]

In order to achieve the above-mentioned object, an automobile with an electric assist function according to the present invention rotates a rotor of a generator, which generates electric power by rotation of an engine, with electric power of a power storage means to rotate the engine. Configured to assist.

[0008]

According to the above construction, for example, by rotating the rotor of the conventional alternator with electric energy,
It can assist the rotational operation of the engine and suppress the emission of exhaust gas as much as possible. In particular, if a solar cell for supplying electric power to the power storage means is provided in the vehicle body, electric power can be supplied not only from the engine but also from the solar cell, and solar energy can be effectively used.

Further, the power storage means is composed of the first storage battery for supplying electric power to the electric system of the vehicle and the second storage battery for supplying electric power for rotating the rotor of the generator. Exhaust gas can be reduced by preventing the internal combustion engine from generating more power than necessary. Further, the second storage battery supplies power to the electric system of the vehicle in preference to the first storage battery, so that the need for power generation for the first storage battery is reduced and exhaust gas can be reduced. In addition, the generator charges the first storage battery, charges the second storage battery only when the first storage battery is fully charged, and when the brake is depressed, so that a part of the braking energy is converted to electricity. Can be regenerated.

Further, when the engine is an internal combustion engine and the internal combustion engine is in a no-load rotation state, the fuel supply to the cylinder of the internal combustion engine is stopped, the pressure rise in the cylinder is prevented, and the generator is used. By driving the internal combustion engine at a constant speed, it is possible to prevent exhaust gas from being discharged and also to start a smooth start by operating the accelerator when the engine is in an unloaded rotation state such as an idling state.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a vehicle with an electric assist function according to the present invention will be described with reference to the drawings. First, a schematic configuration of an engine system S1 of a vehicle with an electric assist function will be described.
As shown in FIG. 1, an engine-side pulley 3 attached to a crankshaft 2 of an engine 1 and a pulley 5 provided on a rotor of a generator 4 are connected by a belt 6 which is a power transmission means. . The generator 4 is connected to the first storage battery 8 via a control device 7 including an inverter or the like. Here, the control device 7 controls the generator 4 to the engine 1
The motor that assists the rotation of the
It is controlled whether or not to operate the storage battery 8 as a generator for charging. The first storage battery 8 is for supplying electric power to the electric system of the vehicle.

Further, a solar cell 9 is provided on the vehicle body, and when the solar cell 9 receives light energy of sunlight or the like and outputs the generated power, the MPPT (maximum output power) can be always taken out. A point tracking device) 10 is connected to the output side of the solar cell 9, and the second storage battery 11 is charged via this. Here, the second storage battery 11 is also for supplying electricity to the electric system of the vehicle, and when the generator 4 is operated as a motor, the control device 7 controls so as not to discharge it.

The control device 7 is also electrically connected to a vehicle speed sensor, a transmission state sensor, a pressure control means, etc., which will be described later, and controls so as to operate each element by receiving signals from these sensors. To do.

Further, as shown in FIGS. 2 and 3, when the engine 1 is, for example, a four-cycle engine, when the engine 1 is rotating at no load such as idling, a fuel control system (fuel supply control means) (not shown) is used. Cut the fuel,
It is possible to prevent exhaust gas from being released as much as possible. That is, as shown in FIG. 3, the pressure control means 28 connected to the control device 7 pushes up the rocker arm 27 that is in contact with the exhaust side cam 26 in normal operation to open the exhaust valve 23, It is possible to prevent the compression of air by the piston 21 in the cylinder 20 so that the motor 4 of the generator 4 can be smoothly rotated. Further, when the driver performs a start operation, the control device 7
Controls the pressure control means 28 to descend, enables the compression operation by the piston 21 as shown in FIG. 2, and further, the fuel is supplied by the above-mentioned fuel supply control means so that the vehicle can start smoothly. It will be possible. In addition,
In the figure, 22 is an intake valve, 25 is its rocker arm, and 24 is a cam.

It should be noted that, compared with a case where the engine is stopped each time the vehicle is stopped and the engine 1 is rotated by a starter motor each time the vehicle is started, according to this configuration, the engine 1 is stopped even when the vehicle is stopped.
Since is rotating, it is possible to start smoothly.

Next, the operation of the control device 7 will be described in detail. As shown in FIG. 4, first, whether the first storage battery 8 is fully charged is detected by its terminal voltage (step 10
0), if the first storage battery 8 needs to be charged, the generator 4
This is charged by the power generation of (step 110, 12
0). Further, the pressure control means 2 is released by releasing the hydraulic pressure.
8 is reset (step 130).

If the first storage battery 8 is fully charged in step 100 and the engine 1 is running (step 140), the generator 4 is operated as a motor to assist the rotation of the engine 1 (step 150). . Then, it is detected that the accelerator is not operating and that the vehicle speed is zero by the signal from the vehicle speed sensor (step 160), and that the transmission is in neutral by the signal from the transmission state sensor. If so (step 170), oil is supplied to operate the pressure control means 28 (step 180). On the other hand, step 160
If it is detected that the accelerator is operating or the vehicle speed is not zero in accordance with the signal from the vehicle speed sensor in step 1, or if it is detected in step 170 that the transmission is not in neutral, step 130 is executed. On the other hand, if the engine 1 is stopped in step 140, the operation of the generator 4 is stopped (step 1
90).

Next, at step 200, it is judged if the brake is operating. Here, if the brake is in operation, the generator 4 generates power by weak regenerative braking (step 210). Then, when the first storage battery 8 is fully charged, the electric energy from the generator 4 is controlled so as to charge the second storage battery 11. On the other hand, if the first storage battery 8 is not fully charged, it is charged (step 24).
0). Next, it is determined whether or not to supply electricity to the electric system of the vehicle depending on the discharge state of each storage battery (step 27).
0). Here, if it is unnecessary to supply electricity to the electrical system, the second
The storage battery 11 of No. 1 is controlled so as to stop discharging to the electrical system (step 250), the discharging of the first storage battery 8 to the electrical system is also stopped (step 260), and step 1
Return to 00.

On the other hand, if it is necessary to supply electricity to the electrical system in step 270, it is determined whether there is a remaining electric capacity of the second storage battery 11 by detecting the terminal voltage (step 280). If there is no predetermined amount,
The first storage battery 8 is controlled so as to discharge to the electrical system, the second storage battery 11 is stopped from discharging to the electrical system (step 300), and the process returns to step 100.

If it is determined in step 280 that the remaining electric capacity of the second storage battery is not less than the predetermined amount, the second storage battery 1
1 is controlled to be discharged to the electrical system (step 31
0), and further, control is performed so as to stop discharging the first storage battery 8 to the electrical system (step 320), and step 1
Return to 00.

As described above, if the second storage battery 11 has a remaining electric capacity, when the generator 4 is operated as a motor, the second storage battery 11 is discharged, and also when the electricity is supplied to the electrical system, the first storage battery 8 is used. Since the control is performed so that the electric discharge is prioritized with respect to, the time for generating power in the engine 1 can be reduced, and the amount of exhaust gas emission can be further reduced.

Further, while the engine 1 is rotating, the generator 4 rotates as a motor as long as the second storage battery 11 has electricity, and has a function of assisting the rotation of the engine 1. For example, when the solar cell 9 having an output of about 200 W is attached to the roof of the vehicle, about 900 Wh of power can be obtained on a sunny day.
If the distance traveled by the vehicle in one day is about 20 km, it will be about one hour in terms of time. That is, it becomes possible to sufficiently rotate the generator 4 as a motor by the power generation of the solar cell 900 Wh, and thereby the emission amount of exhaust gas can be further reduced.

Next, another embodiment will be described. Figure 5
As shown in FIG. 1, a storage battery 12 larger than the conventional storage battery for automobiles may be provided, and the first and second storage batteries 8 and 11 in FIG. 1 may be integrated. In this case, the control device 7
Is for detecting the remaining electric capacity of the storage battery 12, and when the remaining electric capacity is below a certain capacity, the generator 4 is operated as a generator. This simplifies the structure and reduces the size.
It is possible to reduce the weight.

In this embodiment, the four-cycle engine has been described as an example of the engine. However, the engine is not limited to this, and it can be applied to various engines such as a two-cycle engine, a diesel engine, a rotary engine, and is appropriately changed. It can be implemented.

[0025]

As described above, according to the vehicle with the electric assist function of the present invention, the generator used in the conventional fuel type vehicle can be used as the motor. Since the rotation of the engine is assisted by the rotation of the rotor of the generator when the vehicle is stopped or when the vehicle is stopped, it is possible to provide a pollution-free vehicle in which the emission amount of exhaust gas is reduced as much as possible. Further, if a solar cell for supplying electric power to the power storage means is provided in the vehicle body, electric power can be supplied not only from the engine but also from the solar cell, so that the solar energy can be effectively used. Furthermore, when the engine is an internal combustion engine and the internal combustion engine is in a no-load rotation state, the fuel supply to the cylinder of the internal combustion engine is stopped and the pressure rise in the cylinder is prevented, so that, for example, in an idling state, etc. At the time of no load rotation, exhaust gas emission can be eliminated and at the same time, a smooth start can be realized by operating the accelerator.

[Brief description of drawings]

FIG. 1 is a partial schematic configuration diagram of an automobile with an electric assist function for explaining an embodiment according to the present invention.

FIG. 2 is a schematic configuration diagram of an engine in normal operation for explaining an embodiment according to the present invention.

FIG. 3 is a schematic configuration diagram of an engine at a low rotation speed such as idling for explaining an embodiment according to the present invention.

FIG. 4 is a flowchart illustrating a control flow of the control device.

FIG. 5 is a partial schematic configuration diagram of an automobile with an electric assist function for explaining another embodiment according to the present invention.

FIG. 6 is a partial schematic configuration diagram of an automobile with an electric assist function for explaining a conventional example.

[Explanation of symbols]

1 ・ ・ ・ Engine 2 ・ ・ ・ Crankshaft 3 ・ ・ ・ Pulley 4 ・ ・ ・ Generator 5 ・ ・ ・ Pulley 7 ・ ・ ・ Control device 8 ・ ・ ・ First storage battery 9 ・ ・ ・ Solar cell 10 ・ ・・ MPPT 11 ・ ・ ・ Second
Storage battery 12 ... storage battery 28 ... pressure control means

Claims (3)

[Claims] 1. An automobile with an electric assist function, which is configured to rotate a rotor of a generator that generates electric power by rotational operation of an engine with electric power of a power storage means to assist the rotational operation of the engine. 2. The automobile with an electrically assisted function according to claim 1, wherein a solar cell is used to supply electric power to the power storage means. 3. The fuel supply control means for stopping the fuel supply to the cylinder of the internal combustion engine when the engine is an internal combustion engine and the internal combustion engine is in a no-load rotation state, and the pressure rise in the cylinder. The vehicle with an electric assist function according to claim 1, further comprising: