JPH01224420A - Alternating current electric source device for vehicle - Google Patents

Abstract

PURPOSE:To prevent the wild run of a vehicle at what is equipped with a generator which is driven by a vehicle carried engine and generates alternating electric power in frequency for business, by releasing an idle up control at the time of the release of a brake and at the time of the detection of the non-neutral state of a transmission. CONSTITUTION:An alternating current dynamo 1 driven by an engine is constituted with an armature winding consisting of low pressure windings 11a-11c and high pressure windings 12a-12c, a three phase all wave rectifier 13, an auxiliary rectifier 15 and a voltage regulator 16. And at the idling operation state of the engine, a throttle valve 105 is opened by controlling an actuator 103 by means of a controller 102, and a predetermined alternating current output from the dynamo 1 is generated by raising the revolution number of idling. In this instance, control is arranged so as to release an idling up control when a brake is released due to a side brake switch 8 being 'OFF', or when a transmission is not in a neutral position due to a neutral switch 9 being 'OFF'.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to an AC power supply device for a vehicle, and in particular, to safety of a power supply device that obtains AC power at a commercial frequency using an alternator for charging a car battery. Regarding sexual improvement.

[Conventional technology]

Conventionally, various methods have been discussed for obtaining commercial frequency AC power by using the idle rotational energy of one engine while the car is stopped, but originally, in the region where the engine speed is low, the power that can be extracted from the generator is Since the idle speed is small, a method of forcibly increasing the idle speed using an actuator has been proposed, as seen in, for example, US Pat. No. 3,660,671.

[Problem to be solved by the invention]

The above conventional technology does not give any consideration to safety, and there is a risk that the vehicle will run out of control if idle is performed when the brake is not used or the transmission gear is suddenly engaged. It had sex. In particular, as seen in recent years with runaway accidents involving automatic cars, it is necessary to ensure safety by taking into consideration factors such as operational errors by drivers and malfunctions of electronic devices.

The purpose of the present invention is to provide a vehicle with high safety for both AC and DC use;
The object of the present invention is to provide a power supply device.

[Means to solve the problem]

The above purpose is to detect that there is a risk of the vehicle starting to move due to the state of the brake system that brakes the wheels of the vehicle or the state of the neutral switch that detects that the gear of the transmission is in the neutral state, and to stop idling up. , achieved by issuing an alarm.

The state of the braking system is determined by detecting a signal from a switch that is linked to the hand brake used when parking the vehicle. This switch turns on the brake warning light on the driver's instrument panel and is not a new part.

The neutral state of the gear of the transmission is detected by the signal of the neutral switch. This switch is already installed in automobiles that electronically control engine equipment, and in automatic cars that have a gear position indicator light, the signal from the gear position detection switch can also be used.

Even if a car other than the above does not have a switch to detect the neutral state, the neutral state can be easily detected by using a small break-type switch and installing one switch so that the gear is closed when the gear is in the neutral state. can be detected.

[Effect]

Idle up is canceled so that the engine speed does not increase when the braking device is released, that is, when the hand brake is not applied. Alternatively, it operates to cancel idle up when the neutral switch is not turned on. This prevents the engine speed from increasing and causing the vehicle to run out of control.

Furthermore, by issuing a warning using sound waves at the same time, it is possible to take prompt action even when the system is used away from the vehicle, thereby increasing safety.

〔Example〕

An embodiment of the present invention will be described below with reference to FIG. 1st
The figure is a circuit diagram showing an automobile power generation system having two systems, 12 V DC and 100 V AC.

1 in FIG. 1 is an AC generator driven by an engine (not shown), and has low voltage windings 11a and llb.

11c, an armature winding consisting of high voltage windings 12a, 12b, and 12c, and low voltage windings 11a, 1lb.

a three-phase full-wave rectifier 13 that performs three-phase full-wave rectification on the output of 11c;
Armature windings 11a, llb, llc, 12a.

It consists of an auxiliary rectifier 15 which supplies magnetic flux to 12b and 12c, and a voltage regulator 16 which controls the current flowing through the field winding 14 and adjusts the low voltage output voltage. Voltage regulator 16 includes power transistors 161. Diode 16.2. Transistor 163. Zener diode 164. resistor 165,
166a and 166b.

A battery 2 is charged by the generator 1 and supplies current to the DC load 3 . 4 is a key switch;
Electric power is supplied from the battery 2 to the running load 5, allowing the engine to rotate and the vehicle to run. 6 is a charging indicator light, 7 is a brake warning light, 8 is a switch that closes when the hand brake (not shown) is pulled, and 9 is a neutral switch that closes when the transmission gear is in the neutral state. It's a switch. 10 is the high voltage electric machine pre-winding m of generator 1
Three-phase AC output U of 12a, 12b, 12c.

(2) A three-phase full-wave rectifier that rectifies W, and power transistors 100a, 100b, and 100c.

Power is supplied to AC load 101 via 100d. 1
02 is a controller, and a power transistor 100
In addition to a, 1oob, 100c, 100d, motor 10
3. The piezoelectric buzzer 104 is vibrated. The motor 103 drives an accelerator pedal (not shown) and operates a fuel system throttle valve 105 to control the amount of fuel supplied to the engine.

The operation of the above configuration will be described below. First, when the key switch 4 is turned on while the engine is stopped, current is supplied from the battery 2 to the running load 5, and the charging indicator light 6. Field winding 14. Current flows through the power transistor 161, the charging indicator light 6 lights up, and field current flows through the field winding 14. Next, when the engine starts rotating,
Armature windings 11a, llb, llc, 12a, 12b.

An alternating current voltage is generated at 12c, and a direct current voltage is generated through the three-phase full-wave rectifier 13, and power is supplied to the battery 2 and the direct current load 3. On the other hand, the voltage at the cathode terminal of the auxiliary rectifier 15 also increases, turning off the charging indicator light 6, supplying current to the field winding 14, and starting self-excitation. Further, as the rotational speed of the generator 1 increases, the output voltage increases, and the terminal voltage of the battery 2 also increases. Then, the voltage at the voltage dividing point of resistors 166a, 166b increases, and Zener diode 164. Transistor 163 conducts and power transistor 161 shuts off. The current flowing through the field winding 14 then passes through the diode 162 and is attenuated. When the field winding decreases, the armature winding 11a
. Output voltage increases. The above operation is repeated, and the voltage of the battery 2 is adjusted to a constant value. On the other hand, the high voltage armature winding 12a
, 12b, 12c, which is rectified by the three-phase full-wave rectifier 10 to obtain a high DC voltage.

Next, the operation of the controller 102 will be explained using the flow chart shown in FIG. The controller 102 has a microcomputer and operates according to a program written in a ROM. First, after turning on the power, initial settings of registers and the like are performed in step 201. Next, in step 202, the calculation of the communication is performed. This is for controlling the conduction rate and adjusting the effective value applied to the AC load 101 to a constant value when the power transistors 100a, 100b, 100c, and 100d are turned on to open the AC load 101. It's a manipulation. Various methods can be considered as specific methods for this, but as an example, the following procedure will be followed.

First, the three-phase aftereffect rectified output voltage Vo is measured, and the conductivity A is calculated.

A=(100/(Vo-2Vp))"-(1
) However, A shall not exceed 1.

vF: ON voltage of power transistor At this conduction rate,
By controlling the conduction of the power transistor, the AC load 10
The effective voltage applied to 1 does not exceed 100V,
A method of controlling the power transistor will be described later.

Next step 203. Go to and measure the engine speed.

The engine speed can be easily calculated by counting signal intervals from a crank angle sensor (not shown) and calculating the reciprocal. In this step, when the output voltage Vo of the three-phase full-wave rectifier 1o is less than 100V, if the engine speed has not reached the upper limit and Vo is less than 100V, an instruction is given to idle up. .

Next, the process goes to step 204, where the power transistors are controlled. 1 when power transistors 100a and 100d conduct, when 100b and 100c conduct,
When 00b and 100c are electrically connected, the direction of the current flowing through the AC load 101 is reversed, and by repeating this, an AC output is obtained. If 100b and 1ooc are made conductive immediately after 100a and 100d are made conductive, the 5 conduction rate will be 100%, but if VO is higher than 100V, the conduction rate of the power transistor will be the same as that determined in step 202. Perform on/off control so that A is achieved.

Next, in step 205, the state of the hand brake switch 8 is checked, and if it is ON, that is, the hand brake is being pulled, the process proceeds to step 2068; otherwise, the process proceeds to step 208.

In step 206, it is checked whether the gear of the transmission is in the neutral state. If the gear is in neutral, the process proceeds to step 207; otherwise, the process proceeds to step 208.

In step 207, the motor 103 is controlled based on the result of whether to increase or decrease the engine speed determined in step 203.

If the hand brake is not applied or if a vehicle speed pulse is detected, the motor 103 is moved away so as to release the idle up state in step 208. After exiting step 207, the process returns to step 202 to form a feedback loop, but after canceling the idle-up state in step 208, the process jumps to step 209, performs a routine to drive the piezoelectric buzzer 104 once, and then returns to step 202. Return to 202.

In this embodiment, the existing detectors of the hand brake switch 8 and the neutral switch 9 are used.
It has the advantage of little cost increase. In addition, since idle up is released either when the handbrake is not applied or when the vehicle is not in neutral, it has a double fail-safe mechanism and can ensure high safety. .

In this embodiment, a hand brake switch 8 and a neutral switch 9 are used as the detectors, but a parking range switch of an automatic transmission device or the like may also be used. Further, the same applies when a solenoid valve or the like is used instead of the motor 103 as the actuator for idle control. Furthermore, a method using voice synthesis technology instead of the piezoelectric buzzer 104 as an alarm device is also conceivable.

〔Effect of the invention〕

According to the present invention, the idle rotational speed increases even when the brake is not used or when the gear of the transmission is suddenly engaged in a device that obtains power for both AC and DC using the engine's idle rotational energy. This has the effect of increasing the safety of the device or vehicle.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram showing a power generation system of an automobile according to an embodiment of the present invention, and FIG. 2 is a flow chart explaining the operation of the controller 102 shown in FIG.

Claims (1)

[Claims] 1. A generator that is driven by a vehicle engine and generates an AC output, an actuator that controls the idle rotation speed of the engine, and wheels that are driven by the engine via a transmission and are restrained. In a vehicle system comprising a braking device that detects a neutral position of the transmission, and a neutral switch that detects a neutral position of the transmission, the braking device is released, or the neutral state of the transmission is released by the neutral switch. An AC power supply device for a vehicle, comprising a control circuit that releases control of the idle rotation speed when the idle speed is detected. 2. Claim 1 is characterized in that a sonic oscillator is provided, and the control circuit has an alarm circuit that drives the sonic generator and issues an alarm at the same time as the control of the idle rotation speed is released. AC power supply device for vehicles.