JPS61203834A - Dynamo controller for vehicle - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention provides a system that gradually changes the voltage so that the change in brightness is not noticeable to the public because when power generation is stopped while the lighting equipment is on, the illuminance of the lighting equipment decreases. The present invention relates to a vehicle generator control device configured as described above.

[Conventional technology]

In recent years, in order to improve the efficiency of internal combustion engines, it has been considered to temporarily stop all power generation from a generator and reduce the load torque.

However, if the power generation is stopped while the lighting equipment is on, the brightness of the lighting equipment will change, so in order to prevent this, as shown in Japanese Patent Application Laid-Open No. 59-99939, power generation is not completely stopped while the lighting equipment is on. There is something that does that.

[Problem that the invention seeks to solve]

However, the effect of reducing the driving torque of the generator is great when a large electrical load is applied, such as when the headlights are on, and the conventional method cannot be said to be appropriate. This invention solves this problem. The object of the present invention is to provide a generator control device for a vehicle that can reduce the output of the generator at any time and make it difficult to distinguish between brightness and darkness of lighting equipment.

Friendly Means for Solving Problem 1] A generator control device according to the present invention is capable of controlling output electricity t of a generator.
This device is equipped with a control means that gradually changes the brightness of the lighting equipment by controlling the voltage regulator so that when changing the lighting equipment, the amount of electricity output from the generator gradually changes if the lighting equipment is lit. be.

[For production]

In this invention, when the lighting equipment is turned on, the control means changes the reference voltage and applies it to the voltage regulator, which acts to gradually change the amount of electricity output from the generator in accordance with the change in the reference voltage. do.

〔Example〕

Embodiments of the vehicle generator control device of the present invention will be described below with reference to the drawings. FIG. 1 is a circuit diagram of one embodiment. In FIG. 1, a generator 1 has an armature coil 1a and a field coil 1b, and the output of the generator 1 is subjected to three-phase full-wave rectification by a rectifier 2.

The output terminal 201 of the rectifier 2 is adapted to supply power to the storage battery 4 and the electric load 7, and the output terminal 202 is connected to the positive terminal of the storage battery 4 via the initial excitation resistor 5 and the key switch 6. There is. The negative electrode of the storage battery 4 is grounded.

A series circuit of a switch 9 and a lighting fixture 8 is connected in parallel to the storage battery 4 . Further, the positive electrode of the storage battery 4 is connected to the controller 11 via a switch 9a.
is grounded via switch 10.

The output of the controller 11 is sent to the regulator 3f of the voltage regulator 3.
It is connected to the input terminal and outputs the full reference voltage.

The switch 9 is a lighting switch for the lighting equipment 8, and is used to detect all lighting of the lighting equipment 8 in conjunction with the switch 9a. This is a switch that requests power generation to stop.

- 3 voltage regulators, and resistors 3d and 3e are connected in series between output terminals 202 and 203. Output end 203 is grounded. The resistors 3d and 3e are voltage dividing resistors, and their connection point is connected to the (-) input terminal of the comparator 3f.

The output of the comparator 3f is supplied to the base of the transistor 3b. The base of transistor 3b is connected to output terminal 202 via base resistor 3C. The emitter of the transistor 3b is grounded, and the collector is connected to the output end 202 via the diode 3a and also to the output end 202 via the field coil 1b.

This voltage regulator 3 is for controlling the output voltage of the generator 1 to a regulated voltage value, and the diode 3a that constitutes this is for absorbing surges when the field current flowing through the field coil 1bK is interrupted. In addition, the transistor 3b is for intermittent field current, and the comparator 3f is connected to the reference voltage output from the controller 11 and the output of the generator 1 divided by the resistors 3d and 3e. The transistor 3bt is controlled to be on/off by comparing the voltage.

Next, the operation will be explained. When the key switch 6 is closed,
A base current flows from the base resistor 3C to the transistor 3b through the initial excitation resistor 5, and this transistor 3b
is conductive, field current flows through the field coil 1b, and the generator 1
becomes capable of generating electricity, and a voltage is applied to the filJ controller 11 from a stabilized power source (not shown), and this controller 11 becomes operational, and the reference voltage is applied to the converter 3f.
When the generator 1 is driven by an engine (not shown), the generator l generates 1! t-start, the output voltage rises. When the output voltage divided by the resistors 3d and 3e exceeds the reference voltage output from the controller 11, the output of the comparator 3f becomes low level.
When the output voltage of the generator 1 decreases by making it non-conducting and cutting off the field current, the output voltage divided by the resistor 3 d s 3 e decreases by the above reference voltage. The output of the converter 7f becomes high level again, the transistor 3bt becomes conductive and a field current flows, and the output voltage of the generator 1 rises again.

By repeating the above operations, the output voltage of the generator 1 is controlled to a value corresponding to the reference voltage output by the controller 11.

Next, the operation of the controller 11 will be explained with reference to the flowcharts shown in FIGS. 2 and 3. Figure 2 shows the operation of the main program, which starts running when the power is turned on.
The program is in a loop, so it is constantly running over and over again.

FIG. 3 shows the operation of the timer routine, which is executed at regular intervals by an interval timer.

First, the operation when the lighting fixture 8 is not lit will be explained. When the power is turned on and the initial settings are completed in step 200 in FIG. 2, the process proceeds to step 201. Here, it is determined whether to stop power generation based on the state of the switch 10.

Next, in step 202, the lighting state of the lighting fixture 8 is checked. Since the lighting fixture 8 is not currently lit, the process advances to step 203. Here, the request state for power generation stop determined in step 201 is checked. If there is no request to stop power generation, Vout = VM in step 205
As AX, the above Vout is outputted to the voltage regulator 3 as a reference voltage value in step 206. In addition, VMAX
is the reference voltage value for obtaining the regulated voltage in the normal power generation state.

Next, the process returns to step 201. However, step 20
If there is a request to stop power generation in step 3, Vou
Assuming that t=VMIN, Vout is output in step 206 in the same manner as above. Here, Vyt t N
If set to a reference voltage such that the output adjustment voltage of generator 1 is lower than the storage battery terminal voltage, generator 1 will generate 1
! 0 Next, the operation when the lighting fixture 8 is lit will be explained. When the switch 9 is closed and the lighting fixture 8 is turned on, the switch 9a is linked with the switch 9, so it is closed at the same time, notifying the controller 11 that the lighting fixture is being lit. Then, directly from step 202 to step 20
6, the reference voltage Vou is set on the main program.
t is not changed, but when the timer routine is started by the interval timer, Vout changes to 0. Now, Vout = VMAX, step 201
If a power generation stop request occurs in step 301 of FIG. 3, the power generation stop request is checked, and step 302
Proceed to. Here, Vout and ViuNe are compared and V
out) If it is VMIN, the Vo
ut t-subtract and exit this routine.

In this way, each time the timer routine is activated, the Vo
ut t - is sequentially subtracted, and if Vout (VMIN) is reached, the process goes directly from step 302 to step 306, and Vout does not decrease any further.

In this way, Vout does not change in the main program, but Vout decreases sequentially in the timer routine, so the reference voltage Vout output in step 206
gradually decreases, the output voltage of the power generator @l also decreases successively, and the brightness of the lighting equipment changes little by little.

If the power generation stop request is released, step 301
Then, the process proceeds to step 304, and while Vout<VyAx, in step 305, Vout is sequentially added, the reference voltage is sequentially increased, the output voltage of the generator 1 is also sequentially increased, and the brightness of the lighting fixture 8 is gradually changed.

When Vout rises to VMAX, the process goes directly from step 304 to step 306 and is not added any more. Note that even when the lighting fixture 8 mentioned above is not lit,
The timer routine is started by an interno timer, but since step 204 is not set to 205 and Vout is once set to KVMIN and VMAX, in the timer routine, the check in step 302 or 304 causes step 303 or 305',
Proceed to step 306, the timer routine
It does not affect the setting of t in any way 111.

As described above, when the lighting fixture 8 is turned on, the brightness of the lighting fixture 8 is gradually changed by gradually changing the output voltage of the generator 1, so that the brightness of the lighting fixture 8 is not noticeable to the human eye. In the embodiment, the operation by a program is shown, but if the controller 11 performs the same operation, it may be configured with a digital circuit such as a timer counter or a logic circuit, or it may be configured with an analog circuit. I don't mind.

Further, in the above embodiment, the voltage regulator 3 is capable of changing the total voltage value, but if it can gradually change the output voltage, for example, it can change the output current of the generator 11. But that's fine.

〔Effect of the invention〕

As explained above, in this invention, when the lighting equipment is on, the voltage regulator is controlled so that the output electricity i of the generator is gradually changed by the controller. The driving torque can be reduced by lowering the output of t*, and there is also the effect that the brightness of the lighting equipment cannot be determined even when the lighting equipment is turned on.

[Brief explanation of the drawing]

The first factor is an excitation diagram showing an embodiment of the vehicle generator control device of the present invention, FIG. 2 is a 70-chart of the main program showing the operation of the vehicle generator control device of the present invention, and the third factor is
The figure is a flowchart of a timer routine showing the operation of the vehicle generator control device of the present invention. 1... Generator, 3... Voltage regulator, 4... Storage battery, 6... Key switch, 7... Electric load, 8...
Lighting equipment, g, 9a, 10... switch, 11...
controller. In addition, the same symbols in the figures indicate the same or corresponding parts.

Claims (1)

[Claims] A generator that supplies power to an electrical load including a lighting fixture, a detection means that detects lighting of the lighting fixture, a voltage regulator that controls the output electricity quantity of the generator to a predetermined adjusted electricity quantity value,
A generator control device for a vehicle, comprising a controller that controls the voltage regulator so that the amount of electricity output from the generator gradually changes when the lighting equipment is turned on.