JP3266383B2 - Automotive generator control - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control apparatus for a generator for a motor vehicle, and more particularly to a control apparatus for variably controlling a generated voltage according to an operation range of an engine.

[0002]

2. Description of the Related Art Generally, an automobile is equipped with a generator which is driven by an engine and charges a battery. The generated voltage of the generated electric power is variably controlled in accordance with the operating range of the engine. . For example, it is known that the generated voltage is increased in a deceleration region or an idle region, and the generated voltage is decreased in an acceleration region or a steady region. According to this, the generator load acting on the engine is increased. The battery is sufficiently charged in a deceleration region or an idle region where no problem occurs, and the generator load is reduced in an acceleration region or a steady region where engine output is required or fuel efficiency is emphasized. Will be satisfied.

According to Japanese Patent Application Laid-Open No. 61-203834, apart from the above-described variable control of the generated voltage according to the operating range of the engine, the generated voltage is gradually changed when the lighting device is turned on. Thus, there is disclosed an apparatus that reduces the engine load and prevents a rapid change in the illuminance of the lighting device.

[0004]

As described above, when the generated voltage is variably controlled in accordance with the operating range of the engine, for example, when the illumination lamp is lit or the brake is activated. When the power generation voltage shifts from the region where the generated voltage is set high to the region where the generated voltage is set low, the amount of power supplied to the illumination lamp or the brake lamp rapidly decreases. The illuminance of a lamp or the like will drop sharply and drastically. And especially this problem is
Since this occurs in a state where the lighting lamp and the brake lamp are lit, the sense of discomfort given to the driver of the vehicle or a nearby vehicle is greater than when the lighting device is supposed to be lit according to the invention of the above publication. is there.

In view of the above, the present invention provides a motor vehicle in which the generated voltage of a generator is variably controlled according to the operating range of the engine while ensuring the required operability of the engine.
An object of the present invention is to prevent a sudden change in the illuminance of an illumination light or a brake lamp at the time of shifting the operation region as described above.

[0006]

Means for Solving the Problems In order to solve the above problems, the present invention is characterized in that it is configured as follows.

First, the invention according to claim 1 of the present application (hereinafter referred to as “the invention”)
According to a first aspect of the present invention, there is provided an operating area detecting means for detecting an operating area of the engine, and a voltage adjusting means for adjusting a generated voltage of the generator according to the operating area of the engine detected by the detecting means. In a deceleration region of the engine, the generated voltage is adjusted to a first predetermined voltage higher than the battery standard voltage, and in a low speed region adjacent to the low engine speed side of the deceleration region, a second voltage lower than the first predetermined voltage is set. In the configuration in which the voltage is adjusted to the predetermined voltage, the power generation voltage is changed to the first predetermined voltage when at least one of the illumination lamp and the brake is turned on when the operation region is shifted from the deceleration region to the low speed region. A voltage control means for holding a voltage is provided.

According to a second aspect of the present invention (hereinafter, referred to as a second aspect of the invention), similarly to the first aspect of the present invention, an operating area detecting means and a voltage adjusting means are provided, and the generated voltage is reduced in an engine deceleration area. The battery is adjusted to a first predetermined voltage higher than the battery standard voltage, and is adjusted to a second predetermined voltage lower than the first predetermined voltage in a low speed region adjacent to a low engine speed side of the deceleration region. In the configuration, at the time of the shift of the operation region from the deceleration region to the low speed region, at least one of the illumination lamp and the brake is turned on.
In this case, voltage control means for controlling the generated voltage to a voltage lower than the first predetermined voltage and higher than the second predetermined voltage is provided.

The invention according to claim 3 (hereinafter referred to as "third")
The invention also includes an operating area detecting means and a voltage adjusting means, wherein the generated voltage is adjusted to a first predetermined voltage higher than the battery standard voltage in the engine deceleration area, and the low engine rotation in this deceleration area is performed. In a low-speed region adjacent to the number side, the voltage is adjusted to a second predetermined voltage lower than the first predetermined voltage, and in at least one of a high-speed region and a high-load region, an intermediate voltage between the first and second predetermined voltages is set. Third
In the configuration that is adjusted to a predetermined voltage,
A voltage control means for controlling a generated voltage to the third predetermined voltage when the operation region is shifted from the deceleration region to the low speed region and at least one of the illumination lamp and the brake is ON is provided. I do.

Further, the invention according to claim 4 (hereinafter referred to as a fourth invention)
The invention also includes an operating area detecting means and a voltage adjusting means, wherein the generated voltage is adjusted to a first predetermined voltage higher than the battery standard voltage in the engine deceleration area, and the low engine rotation in this deceleration area is performed. In the low-speed region and the steady-state region adjacent to the number side and the high load side, respectively,
In the configuration in which the voltage is adjusted to the second predetermined voltage lower than the predetermined voltage, at least one of the illumination lamp and the brake is turned on when the operation region is shifted from the deceleration region to the low speed region or the steady region. In some cases, a voltage control means for holding the generated voltage at the first predetermined voltage or controlling the generated voltage to a voltage lower than the first predetermined voltage and higher than the second predetermined voltage is provided.

The invention according to claim 5 (hereinafter referred to as the fifth invention)
The invention is characterized in that a fuel cut region in which the supply of fuel to the engine is stopped is adopted as the deceleration region in the first to fourth inventions.

[0012]

Next, the operation of each of the above inventions will be described.

First, according to the first invention, from the deceleration region in which the generated voltage of the generator is adjusted to the first predetermined voltage higher than the battery standard voltage, the second generated voltage is lower than the first predetermined voltage. At the time of shifting to the low-speed region where the voltage is adjusted to the predetermined voltage, at least one of the lamp and the brake is turned off.
In the case of N, the generated voltage is maintained at the first predetermined voltage higher than the battery standard voltage in the deceleration region, so that the illuminance of the lighting lamp or the brake lamp in the lighting state is maintained as it is.

[0014] According to the second aspect of the present invention, similarly, the generated voltage is lower than the first predetermined voltage from the deceleration region where the generated voltage of the generator is adjusted to the first predetermined voltage higher than the battery standard voltage. At the time of transition to the low-speed region adjusted to the second predetermined voltage, when at least one of the illumination lamp and the brake is ON, the generated voltage is lower than the first predetermined voltage but is lower than the second predetermined voltage. Since the voltage is controlled to be high, it is possible to avoid a large decrease in illuminance, such as when the voltage is reduced to the second predetermined voltage in the low-speed region, and to reduce the engine load as compared with the case where the first predetermined voltage is maintained. As a result, the fuel consumption performance in the low-speed range is prevented from deteriorating.

Further, according to the third invention, when at least one of the illuminating lamp and the brake is turned on at the time of transition from the deceleration region to the low speed region, at least one of the high rotation region and the high load region is similarly provided. Is adjusted to the third predetermined voltage which is intermediate between the first and second predetermined voltages, and the same operation as the second invention can be obtained without newly setting a voltage as an adjustment target. Will be.

According to the fourth aspect, the generated voltage is adjusted to the first predetermined voltage higher than the battery standard voltage in the deceleration range, and is adjacent to the low engine speed side and the high load side in the deceleration range, respectively. In the low-speed region and the steady region, when the voltage is adjusted to the second predetermined voltage lower than the first predetermined voltage, not only when shifting from the deceleration region to the low-speed region, but also when shifting to the steady region. During the transition,
The generated voltage is maintained at the first predetermined voltage, or
Since the voltage is controlled to be lower than the predetermined voltage and higher than the second predetermined voltage, in these cases, the illuminance of the illumination lamp or the brake lamp is maintained or a significant decrease is prevented.

According to the fifth aspect of the present invention, the first to fourth aspects are described.
When the supply of fuel to the engine is stopped in the deceleration region, the effect of the invention is obtained when the fuel cut region shifts to the low speed region or the steady region.

[0018]

Embodiments of the present invention will be described below.

As shown in FIG. 1, this embodiment has a controller 10 for controlling the power generation voltage of the alternator 1, and the controller 10 detects the engine speed as a sensor for detecting the operating range of the engine. And a signal from a sensor 12 for detecting an engine load such as a throttle opening, for example.

The controller 10 determines the current operating region based on the engine speed and the engine load indicated by the signals from the sensors 11 and 12, and presets the operating region in accordance with the determined operating region. A control signal is output to the voltage adjustment circuit 13 so that the voltage becomes the generated voltage. In response to this, the voltage adjustment circuit 13 adjusts the generated voltage of the alternator 1 to a value corresponding to the operation range. It has become.

Here, in this embodiment, the generated voltage according to the operating range of the engine is set in advance as shown in the map of FIG.

That is, in the fuel cut-off region where the fuel supply is stopped in the engine deceleration region, the high voltage (15.6 V) higher than the battery standard voltage (12.0 V) is set. The low voltage (12.0 V) equal to the battery voltage is used in the idle region on the low rotational speed side and the fuel feedback control region as the steady operation region set on the high load side of these regions. In the region on the high rotation and high load side of the region, a mid voltage (14.4 V) higher than the battery standard voltage but lower than the high voltage is set.

Further, in addition to the basic control of the generated voltage according to the operation area as described above, the controller 10 controls the generated voltage when the brake is operated (when the brake lamp is turned on) and when the illumination lamp is turned on. The correction control is performed, and the brake ON,
A signal from a brake sensor 14 for detecting OFF and a signal from an illumination sensor 15 for detecting ON and OFF of the illumination are input.

Next, the controller 1 including this correction control
The specific operation of the power generation control of 0 will be described with reference to the flowchart of FIG.

First, the controller 10 executes step S1.
On the basis of signals from the engine rotation sensor 11 and the engine load sensor 12, the current operation region is determined to be a fuel cut region (FC region), a high rotation high load region, an idle region (ID region), or feedback control. It is determined which of the areas (FB areas).

First, when it is in the fuel cut region, the flag F is set to 1 in step S2, then step S3 is executed to set the generated voltage to the high voltage, and in step S4, the alternator 1 The control signal is output to the voltage adjustment circuit 13 so that the generated voltage of the power supply becomes the high voltage.

Thus, in the fuel cut region, that is, when the output of the engine is not required, but rather when the external load of the engine is desired to be increased in order to enhance the effectiveness of the engine brake, the generated voltage of the alternator 1 becomes a high voltage. As a result, the battery is fully charged.

If the operating range is the high-speed high-load range, steps S1 to S5 are executed to set the flag F to 0, and then the generated voltage is set to the mid voltage in step S6. Then, the above step S4
Then, a control signal is output to the voltage adjusting circuit 13 so that the generated voltage of the alternator 1 becomes the mid voltage.

Therefore, in this high rotation and high load region,
The generated voltage of the alternator 1 is made lower than in the case of the fuel cut region (deceleration region), and the external load of the engine is reduced accordingly. As a result, the engine output according to the demand is secured in the high load region and the engine speed is increased. In the region, overcharging of the battery is prevented.

Further, when the operation region is the idle region or the feedback control region, steps S1 to S7 are executed to determine the value of the flag F. In this case, F = 0 except when the region before shifting to the idle region or the feedback control region is the fuel cut region.
Executes step S8, resets the flag F to 0, and sets the generated voltage to the low voltage in step S9. Then, in the above step S4, the alternator 1
The control signal is output to the voltage adjustment circuit 13 so that the generated voltage of the power supply becomes the low voltage.

As a result, the load on the alternator 1 is reduced most in the feedback control region where the fuel consumption performance is emphasized or in the idle region where the fuel consumption performance and stability of the engine operating state are emphasized, and these requirements are satisfied. Will be.

On the other hand, if the current operation region is the idle region or the feedback control region and the preceding region is the fuel cut region, since the flag F is 1, the controller 10 proceeds from step S7. Steps S10 and S11 are executed, and the signals from the brake sensor 14 and the illumination light sensor 15 indicate that the brake and the illumination light are O
It is determined whether or not N.

If at least one of the brake and the illuminating light is ON, steps S10 or S11 to S6 are executed to set the generated voltage to the mid voltage, and the alternator 1 is turned on in step S4.
Voltage adjustment circuit 13 so that the generated voltage of the
To output a control signal.

The change of the power generation voltage in this case will be specifically described with reference to FIG. 4. Assume that the operation region is initially in a feedback control region, for example, and the power generation voltage is a low voltage. And the generated voltage is switched to the high voltage (reference numeral a). At this time, the flag F in FIG. 3 becomes 1, and it is assumed that the brake is operated to stop the vehicle in this fuel cut region (reference B).

If the vehicle speed is reduced by the operation of the fuel cut and the brake operation, and the engine speed is also reduced with the reduction of the vehicle speed, and the operation region enters the idle region (reference numeral C), the operation region When the generated voltage is controlled by only the generated voltage, the generated voltage is switched from the high voltage to the low voltage. In this case, the generated voltage is controlled to the mid voltage by executing step S6 in FIG. (Sign d).

As a result, the power generation voltage decreases from the high voltage to the low voltage when shifting from the fuel cut region to the idle region (or the feedback control region), so that the illuminance of the brake lamp (or the illumination lamp) is sharply and significantly increased. Is prevented from being lowered.

Then, when the vehicle stops and the brake is turned off, if the illumination lamp is off, steps S10 and S11 to steps S8 and S9 in FIG. 3 are executed, and the flag F is reset to 0. At the same time, the voltage is switched to the low voltage which is the generated voltage according to the original operation region (reference E).

[0038]

As described above, according to the control apparatus for a generator for a vehicle according to the present invention, a vehicle in which the generated voltage of the generator is variably controlled in accordance with the operation range of the engine, particularly in the deceleration range, the battery In a vehicle configured to control to a first predetermined voltage higher than the standard voltage and to a second predetermined voltage lower than the first predetermined voltage in a low speed region adjacent to the low engine speed side of the deceleration region, At the time of the shift of the operation range from the deceleration range to the low speed range, when at least one of the illumination lamp and the brake is ON, the first
In the invention, the generated voltage is maintained at the first predetermined voltage, and in the second invention, the voltage is controlled to be lower than the first predetermined voltage but higher than the second predetermined voltage.
Since it is adjusted to a third predetermined voltage intermediate between the first and second predetermined voltages preset in at least one of the high rotation region and the high load region, in any case, the deceleration region Thus, a sharp and significant drop in the generated voltage from a high state (first predetermined voltage) in a low state to a low state (second predetermined voltage) in a low-speed region is avoided. This prevents the illuminance of the illuminating lamp or the brake lamp from suddenly and drastically reduced during the transition of the operating state.

According to the second aspect of the present invention, the increase in the engine load is suppressed as much as possible while preventing the above-mentioned sharp and large decrease in the illuminance, and the deterioration of the fuel efficiency is avoided. For example, since the third predetermined voltage set in advance for at least one of the high-speed region and the high-load region is used, the same effect as that of the second invention can be obtained without newly setting a voltage as an adjustment target. Is obtained.

Further, according to the fourth aspect, the generated voltage is set to the first predetermined voltage higher than the battery standard voltage in the deceleration range, and is adjacent to the low engine speed side and the high load side in the deceleration range, respectively. When the second predetermined voltage lower than the first predetermined voltage is adjusted in the low speed region and the steady region, not only when shifting from the deceleration region to the low speed region, but also when shifting to the steady region. Sometimes, the generated voltage is maintained at the first predetermined voltage or controlled to a voltage lower than the first predetermined voltage and higher than the second predetermined voltage. In this case, too, the illuminance of the illumination lamp or the brake lamp is reduced. The illuminance is maintained or a sharp and large decrease is prevented.

According to the fifth aspect, the effects of the first to fourth aspects are achieved in an automobile in which the supply of fuel to the engine is stopped in the deceleration range.

[Brief description of the drawings]

FIG. 1 is a control system diagram showing an overall configuration of an embodiment of the present invention.

FIG. 2 is a map showing a control area.

FIG. 3 is a flowchart showing the same control operation.

FIG. 4 is a time chart showing the same control operation.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Generator (alternator) 10, 13 Voltage adjustment means, voltage control means (controller, voltage adjustment circuit) 11, 12 Operating area detection means (engine rotation sensor, engine load sensor)

Claims (5)

(57) [Claims] An operating area detecting means for detecting an operating area of an engine, and a voltage adjusting means for adjusting a power generation voltage of a generator according to an operating area of the engine detected by the detecting means are provided. In the deceleration region, the generated voltage is adjusted to a first predetermined voltage higher than the battery standard voltage, and in a low speed region adjacent to the low engine speed side of the deceleration region, a second predetermined voltage lower than the first predetermined voltage is set. A control device for an automotive generator that is adapted to be adjusted to a speed when the operating region is shifted from the deceleration region to the low speed region and at least one of an illumination lamp and a brake is ON. A control device for a generator for a vehicle, further comprising voltage control means for holding a voltage at the first predetermined voltage. 2. An operating area detecting means for detecting an operating area of the engine, and a voltage adjusting means for adjusting a power generation voltage of the generator according to the operating area of the engine detected by the detecting means. In the deceleration region, the generated voltage is adjusted to a first predetermined voltage higher than the battery standard voltage, and in a low speed region adjacent to the low engine speed side of the deceleration region, a second predetermined voltage lower than the first predetermined voltage is set. A control device for an automotive generator that is adapted to be adjusted to a speed when the operating region is shifted from the deceleration region to the low speed region and at least one of an illumination lamp and a brake is ON. A control device for an automotive generator, comprising: voltage control means for controlling a voltage to be lower than the first predetermined voltage and higher than a second predetermined voltage. 3. An operating area detecting means for detecting an operating area of the engine, and a voltage adjusting means for adjusting a generated voltage of the generator according to the operating area of the engine detected by the detecting means. In the deceleration region, the generated voltage is adjusted to a first predetermined voltage higher than the battery standard voltage, and in a low speed region adjacent to the low engine speed side of the deceleration region, a second predetermined voltage lower than the first predetermined voltage is set. And a control device for a generator for an automobile, wherein the control device is adjusted to a third predetermined voltage intermediate between the first and second predetermined voltages in at least one of a high rotation region and a high load region. Voltage control for controlling the generated voltage to the third predetermined voltage when the operating range is shifted from the deceleration range to the low speed range and at least one of the illumination lamp and the brake is ON. A control device for a motor generator for an automobile, characterized by comprising means. 4. An operating area detecting means for detecting an operating area of the engine, and voltage adjusting means for adjusting a generated voltage of the generator in accordance with the operating area of the engine detected by the detecting means, wherein In the deceleration region, the generated voltage is adjusted to a first predetermined voltage higher than the battery standard voltage, and in the low speed region and the steady region adjacent to the low engine speed side and the high load side of the deceleration region, the first predetermined voltage is set. A control device for an automotive generator, which is adapted to be adjusted to a second predetermined voltage lower than the voltage, wherein a shift of the operation region from the deceleration region to the low-speed region or the steady region is performed by an illumination lamp or When at least one of the brakes is ON, the generated voltage is maintained at the first predetermined voltage or controlled to a voltage lower than the first predetermined voltage and higher than a second predetermined voltage. A control device for an automobile generator, comprising: 5. The control device according to claim 1, wherein the deceleration region is a fuel cut region in which supply of fuel to the engine is stopped.