JPS63129900A - Operating & stopping device of electric load for vehicle - Google Patents

Abstract

PURPOSE:To prevent the sudden fluctuation of engine rotating speed, by gradually increasing or decreasing the power sent from a generator to an electric load in changing the operating state and stopping state of the electric load. CONSTITUTION:Power supply control means 9 and 9' are used for duty control of electric load, which are composed of triangular wave generation circuits 9a and 9'a, delay circuits 9b and 9'b to raise or reduce the voltage gradually when the step input is received, comparators 9c and 9'c and power transistors 9d and 9'd. When the first changeover switch 2 for electric load or the second changeover switch 2' for electric load is changed over from OFF to ON, gradually increasing voltage is applied to the electric load. On the other, when the changeover switches 2 and 2' are changed over from ON to OFF, the voltage applied gradually decreases.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an apparatus for starting and stopping an electrical load provided in an electrical system of a vehicle.

[Conventional technology]

2. Description of the Related Art Conventionally, an automobile as a vehicle is equipped with many electrical devices (electrical loads), and is provided with a generator that serves as a power supply source for these electrical devices.

This generator is driven by an engine, and a dynamo with commutator rectification or an alternator with semiconductor rectification can be used to generate electricity.

In either system, a feedback system is provided that changes the field current in accordance with the engine speed and the charging/discharging state of the battery in order to regulate the output terminal voltage and keep it within a predetermined range.

In other words, as shown in Fig. 4, the conventional automobile electric PA
The system is provided with an alternator 1 whose rotor is rotationally driven by an engine, and this alternator 1
The first to third phase films 1a to 1c of the stator (armature) and each of these coils ]a to Ic1. : A three-phase multi-wave rectifier 1 (1T) and a field coil 1e of the rotor (Feel P) are provided to be connected, and the power generation generated from the alternator 1 at the positive output terminal B and the negative output terminal E open. A load (for example, a motor such as an electric fan for cooling the horn eater, a heater such as a differential) 3, which receives voltage via a changeover switch 2;
Also provided are an ignition 5 that receives generated voltage via a key switch 4, and a battery 6 that receives surplus power.

A voltaire regulator 7 is provided which receives the generated voltage via the key switch 4.
The voltage is adjusted by changing the field current supplied to the capacitor c, and there are two types of electronic voltaire regulators: Trannostar type and Viblift IC type electronic voltaire regulators, and mechanical contact type Chirill type voltaire regulators.

[Problem that the invention seeks to solve]

However, in such a conventional electric power system for waste materials, a changeover switch 2 is only provided at +1j to activate/stop the electric load, so large electric fans such as electric fans for cooling horn When the load 3 is turned on and off, the total amount of electrical load changes suddenly or unexpectedly, so the power generation control using the feedback system described above attempts to change the amount of power generation in response to this. In other words, the load on the engine increases.

However, engine rotation control systems generally have poor responsiveness in order to improve stability, and when the changeover switch 2 is switched, the load fluctuates rapidly and the engine rotation speed decreases or increases. There is a problem, and this problem is especially noticeable when idling, and is it true for small displacement engines or low fuel consumption engines? Easy to receive 55.

Then, idle speed control (I
Using only the ISC (SC) alone improves the responsiveness of the ISC, but there is a problem in that the stability deteriorates.

The present invention aims to solve these problems, and it is possible to prevent sudden changes in the electrical load by gradually changing the electrical load without changing engine speed control. An object of the present invention is to provide a device for starting and stopping an electrical load for a vehicle, which can prevent sudden fluctuations in engine speed.

[Means for solving problems]

For this reason, the vehicle electric load activation/stop device of the present invention includes a generator driven by a vehicle engine, an electric load that receives electric power generated by Mukami Deniso, and a vehicle electric load that receives electric power from the generator. and a changeover switch that commands the operation and stop of the 7R1 electric load by controlling the supply of electric power to the 7R1 electric load, and upon receiving a signal from the changeover switch, the above-mentioned electric load changes between the operating state and the stopped state. The present invention is characterized by being provided with power supply control means for gradually increasing or decreasing the power sent from the generator to the electrical load.

[For production]

In the vehicle electric load activation/stop F device of the present invention described above, the power supply control means receives the command signal from the changeover switch, and when the electric load changes between the operating state and the stopped state,
Gradually increasing or decreasing the power sent from the generator to the electrical load.

〔Example〕

Hereinafter, embodiments of the present invention will be explained with reference to the drawings.
Figures IPJ1 to IPJ3 show an apparatus for operating and stopping an electrical load for a vehicle as an embodiment of the present invention, and in Figures 1 to 3, the same reference numerals as in Figure PtrJ4 indicate substantially the same components.

In this embodiment as well, the electric system of the automobile is provided with an alternator 1 whose rotor is rotationally driven by the engine (see Fig. 4). 3-phase coil 1a-1c
A three-phase full-wave rectifier 1d connected to each of these coils 1a to 1c, and a rotor (field) field coil 1e are provided, and a positive output terminal B and a negative output terminal E of the alternator 1 are provided. The generated voltage generated during this time is received via the changeover switch 2? riX load (for example, motors such as an electric fan for cooling Ranoeta, heaters such as defogger?) 3+3', and an ignition 5 that also receives the generated voltage via the key switch 4.
and a battery 6 that receives surplus power.

A voltaire regulator 7 is provided which receives the generated voltage via the key switch 4, and this voltaire regulator 7 connects the field coil 1 to the excitation terminal
The field current supplied to e is changed to adjust excitation and voltage A, and there are two types: a transistor type or hybrid IC type electronic voltage regulator, and a mechanical contact type Chirill type voltage regulator.

Furthermore, as shown in FIG. 1, in this embodiment, the positive side output terminal
A power supply control means 9 is inserted in the wiring #i[8 between the changeover switch 2 for A power supply control means 9' is inserted into the wiring 8' between the changeover switch 2' and the changeover switch 2'.

The power supply control means 9.9'' is for on/off control (duty control) of the electrical load, and is a triangular wave generating circuit 9a that generates a triangular wave [see FIG. , 9'a, a capacitor, and a resistor, and a delay circuit (integrator circuit or low-pass The triangular wave signals from the filters 9b, 9'b and the triangular wave generators 9a, 9'α are received at the negative terminals, respectively, and the step-up or step-down signals from the delay circuits 9°b, 9'1) are connected to the positive terminals, respectively. The open collector type comparators 9C, 9'c receive the fixed wave signal [m
2(c) and 3(c), a power transistor 9d which performs on/off switching in response to 1, respectively;
9'd, a comparator 9c, and pull-up resistors 9e and 9°e connected to the 9°C output terminal.

Additionally, a rotational speed control device including engine idle rotational speed control (ISC) is provided.

Since the vehicle electric load activation/stop device according to the embodiment of the present invention is configured as described above, the changeover switch 2 for the first electric load (radiator cooling electric fan) 3 and the second electric load ( When the switch 2 for defogger heater) 3 is switched from off to on, the delay circuits 9 b, 9 are activated as shown in Pt52 diagrams (a) to (e).
'b when the electrical load is switched [time 1 in Figure 2(b).
The voltage is applied by duty control that gradually increases the time width during which the voltage is turned on from the ON reference 1 [see Figure 2 <c> 1゜Also, the first electric load (radiator cooling electric fan)
When the changeover switch 2 for RJRJ2 and the electric load (defogger heater) for RJRJ2 are switched from ON to OFF, as shown in FIGS. 3(a) to (c),
When the electrical load is switched by the delay circuits 9b and 9'b, the voltage is eliminated by duty control that gradually reduces the time width during which the voltage is turned on from when the electrical load is switched [see time LOFF in FIG. 3(b)].
Refer to FIG. 3(c) 1° As a result, the electrical load gradually increases or decreases, so sudden fluctuations in the electrical load can be prevented, and the engine rotational speed control can respond sufficiently.

Therefore, it is possible to prevent the engine rotational speed from decreasing or increasing, and the engine rotational speed is stabilized, which contributes to the stability of the engine rotational speed, especially during idling.

When the present invention is applied to a small-displacement engine or a low-burning I type engine, its effects become noticeable.

Note that, instead of duty control, Chomba control or equal pulse width frequency modulation control may be used.

Furthermore, a dynamo can be used as the generator as well.

〔Effect of the invention〕

As detailed above, the operation and operation of the electric load for plastic objects of the present invention
The stop device has a simple structure and can prevent drastic changes in the electrical load by gradually changing the electrical load without changing the engine speed control. This has the advantage of preventing sudden fluctuations in engine speed.

[Brief explanation of the drawing]

Figures 1 to 3 show a device for operating and stopping an electric load for a vehicle as an embodiment of the present invention, Figure tpJ1 is its electric circuit diagram, and Figures 2 (,) to (C) are -. Graphs showing the change from the off state to the on state, Figures 3(,) to (c)
) are graphs showing changes from an on state to an off state, and FIG. 4 is a wiring diagram showing a conventional electrical system for office work cars. 1... Alternator, 1a to 1C... 1st to 3rd phase film, 1d... 3-phase full wave rectifier, 2, 2'... Changeover switch, 3, 3°... Electrical load, 4... Key switch ,5・
- Ignition, 6... Battery, 7... Voltaire regulator, 8.8'... Wiring, 9, 9'... Power supply control means, 9 n, 9 'a... Triangular wave generation circuit, 9
b, 9'b...Delay circuit, 9c. 9'c...Comparator, 9d, 9'd...Power transistor, 9e, 9'e...Pull-up resistor.

Claims (1)

[Claims] A generator driven by a vehicle engine, an electric load receiving the electric power generated by the generator, and operation and stop of the electric load by controlling the supply of electric power from the generator to the electric load. A power supply that is provided with a changeover switch that commands and gradually increases or decreases the electric power sent from the generator to the electric load when the electric load changes between an operating state and a stopped state in response to a signal from the changeover switch. characterized in that it is provided with a control means,
Activation/stopping device for electrical loads for vehicles.