JPH07117460A - Idling controller of automobile gasoline engine - Google Patents

Abstract

PURPOSE:To solve the problems of increase in engine noise and the danger of the sudden start of an automatic transmission vehicle by adjusting the opening of an intake air control valve in a gasoline engine according to the target number of revolutions of a motor-driven compressor, which is inputted to an inverter constituting the compressor. CONSTITUTION:A DC power source is comprised of an AC motor 1 driven by the gasoline engine of an automobile and a constant voltage controller 2. A motor-driven compressor is comprised of an inverter 3 connected to the AC power source, an electric motor 4 connected to the inverter 3, and a compressor 5. A refrigerant discharged from the motor-driven compressor is supplied to a refrigerating circuit 6; in this case, a control unit 7 computes the target number of revolutions of the compressor 5 according to an air temperature signal and a vehicle room temperature setting signal, thereby controlling the compressor 5. Thereafter, the target idle speed of the gasoline engine is computed according to the target number of revolutions of the compressor 5, thereby controlling the controller 8 of an air control valve 9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has a DC power source having an AC generator driven by a gasoline engine of an automobile and a constant voltage controller, an inverter, an electric motor, and a compressor driven by the electric motor. The present invention relates to an idling control device for an automobile gasoline engine equipped with an air conditioner including an electric compressor connected to a DC power supply.

[0002]

2. Description of the Related Art A direct current power source having an alternating current generator driven by a gasoline engine of an automobile and a constant voltage controller, an inverter, an electric motor, and a compressor driven by the electric motor are connected to the direct current power source. In an idling control device for a gasoline engine of an automobile equipped with an air conditioner including an electric compressor, conventionally, when the air conditioner is turned on during idling of a gasoline engine, the compressor, and thus the alternating current power generation, of the compressor. Regardless of the actual load on the machine, so that the gasoline engine during idling does not stop even when these loads are maximized,
The idling speed was increased by setting the opening degree of the intake air amount control valve of the gasoline engine.

[0003]

A direct current power source having an alternating current generator driven by a gasoline engine of an automobile and a constant voltage controller, an inverter, an electric motor, and a compressor driven by the electric motor. A conventional gasoline engine idling controller for an automobile equipped with an air conditioner including an electric compressor connected to the Has become unnecessarily high, which causes problems such as an increase in engine sound and a risk of sudden start in the case of an AT car. The present invention has been made in view of the above problems, and includes a DC power supply having an AC generator driven by a gasoline engine of an automobile and a constant voltage control device, an inverter, an electric motor, and a compressor driven by the electric motor. And an electric compressor connected to the DC power supply, and an idling control device for a gasoline engine of an automobile equipped with an air conditioner, the increase in engine sound, the risk of sudden start in an AT vehicle. It is an object of the present invention to provide a control device that is free from problems such as the above.

[0004]

In order to solve the above problems, in the present invention, a DC power source having an AC generator driven by a gasoline engine of an automobile and a constant voltage control device, an inverter, an electric motor and an electric motor. And a compressor driven by an electric compressor connected to the DC power supply, and a target rotation of the compressor input to an inverter in an idling control device for an automobile gasoline engine equipped with an air conditioner including the compressor. Provided is a control device comprising means for adjusting the opening degree of an intake air amount control valve of a gasoline engine based on a number signal.

[0005]

In the present invention, the opening degree of the intake air amount control valve of the gasoline engine is adjusted based on the target rotation speed signal of the compressor input to the inverter. The target speed of the compressor is set low when the load of the compressor, and thus the load of the alternator is small, and is set high when the load is large, so the opening of the intake air amount control valve of the gasoline engine is also set to the load of the compressor, As a result, the load is set small when the load of the AC generator is small, and set large when the load is large.

[0006]

Embodiment An embodiment of the present invention will be described with reference to FIG. As shown in FIG. 1, an AC generator 1 driven by a gasoline engine of an automobile, a constant voltage control device 2 having a rectifying diode, a smoothing capacitor, and a drive circuit,
A DC power supply is constituted by and. The DC power supply includes an inverter 3 having a switching transistor, a freewheeling diode, a regenerative power absorption capacitor, and a drive circuit.
Is connected to the inverter 3. The electric motor 4 and the compressor 5 driven by the electric motor 4 are connected to the inverter 3. The inverter 3, the electric motor 4, and the compressor 5 constitute an electric compressor. The refrigerant discharged from the electric compressor is the condenser 61.
And is discharged to the refrigeration circuit 6 of the air conditioner having the liquid receiver 62, the expansion valve 63, and the evaporator 64. The control unit 7 of the air conditioner includes an evaporator 64 of the air conditioner.
A blow-out temperature signal from a blow-out air temperature sensor 65, a cabin temperature setting signal, and an engine speed signal, which are arranged adjacent to each other, are input to drive the inverter 3 from the control unit 7 of the air conditioner. The target compressor speed signal is output to the circuit, and the target idling speed signal is output to the controller 8 of the air control valve of the gasoline engine.

The operation of the control unit 7 of the air conditioner and the controller 8 of the air control valve of the gasoline engine will be described. Air conditioner control unit 7
Calculates the target rotation speed of the compressor 5 based on the blowout temperature signal and the vehicle compartment temperature setting signal, and outputs the target rotation speed signal to the drive circuit of the inverter 3 to control the rotation speed of the compressor 5. To do. As a result, the temperature of the air blown from the evaporator 64 is controlled. The control unit 7 of the air conditioner calculates the target idling speed of the gasoline engine corresponding to the target speed of the compressor 5, and outputs the target idling speed signal to the controller 8 of the air control valve of the gasoline engine. The controller 8 of the air control valve of the gasoline engine outputs a control signal to the air control valve 9 arranged in the throttle valve bypass passage of the gasoline engine based on the target idling speed signal, and the duty ratio of the air control valve 9 is increased. To control. The duty ratio of the air control valve 9 is increased / decreased according to the increase / decrease of the target rotation speed of the compressor. As a result, the idling speed of the gasoline engine is set high when the load of the compressor is large, and set low when the load of the compressor is small. Therefore, according to the present control device, when the load of the compressor 5 of the air conditioner, and thus the load of the AC generator 1, is small, the idling speed of the gasoline engine becomes unnecessarily high and the engine noise increases, and AT In the case of a car, there is no danger of problems such as a sudden start. Further, the present control device controls the idling speed of the gasoline engine based on the target speed of the compressor 5 of the air conditioner, and feed-forward controls the idling speed of the gasoline engine. Therefore, according to the present control device, the idling speed of the gasoline engine can be controlled by quickly following the fluctuation of the load of the compressor 5 of the air conditioner.

[0008]

As described above, according to the present invention, the opening degree of the intake air amount control valve of the automobile gasoline engine is adjusted based on the target rotation speed signal of the compressor of the air conditioner input to the inverter. To be done. The target speed of the compressor is
When the load of the compressor, and thus of the alternator driven by the gasoline engine, is low when the load is large, it is set high when the load is large. Machine load,
As a result, it is set small when the load of the alternator driven by the gasoline engine is small, and set large when the load is large. As a result, the idling speed of the gasoline engine is set high when the load of the compressor is large, and set low when the load of the compressor is small. Therefore,
According to the present control device, when the load of the compressor of the air conditioner and, by extension, the load of the alternator driven by the gasoline engine of the automobile is small, the idling speed of the gasoline engine becomes unnecessarily high and the engine noise There is no possibility of causing problems such as increase in vehicle speed and danger of sudden start in the case of AT vehicles.

[Brief description of drawings]

FIG. 1 is a conceptual diagram of an idling control device for an automobile gasoline engine according to an embodiment of the present invention.

[Explanation of symbols]

 1 AC Generator 2 Constant Voltage Controller 3 Inverter 4 Electric Motor 5 Compressor 6 Refrigerant Circuit 7 Control Unit 8 Controller for Air Control Valve of Gasoline Engine 9 Air Control Valve for Gasoline Engine

Claims (1)

[Claims] 1. A direct current power supply having an alternating current generator driven by a gasoline engine of an automobile and a constant voltage controller, an inverter, an electric motor, and a compressor driven by the electric motor, and being connected to the direct current power supply. In an idling control device for a gasoline engine of an automobile equipped with an air conditioner including an electric compressor, an opening of an intake air amount control valve of the gasoline engine based on a target rotation speed signal of the compressor input to an inverter. A control device comprising means for adjusting.