JPH0558854U - First idle device - Google Patents

Abstract

(57) [Summary] [Purpose] To improve the effectiveness of engine braking and prevent unnecessary fuel consumption during deceleration in a vehicle equipped with a fast idle section. In an automobile equipped with an air conditioner, a deceleration state detecting means (15) for detecting that the automobile is in a deceleration state is provided, and an air conditioner compressor (1
The first idle section (12) is connected in parallel to the first line via the first idle relay (14). Then, when the deceleration state is detected by the engine brake or the like, the fast idle relay (14) is turned off. As a result, the operation of the fast idle part (12) is stopped in the deceleration state where performing the fast idle is unnecessary or rather harmful. Therefore,
It does not waste fuel and can improve its effectiveness when the engine is being braked.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to a first idle device for an automobile, which reduces fuel consumption.

[0002]

[Prior Art]

 In order to operate the air conditioner, the compressor and blower motor must be operated. When an automobile is equipped with an air conditioner, the drive source of the power supplied to them is the engine, which imposes an extra load on the engine. Therefore, if the engine was rotating at the normal idling speed when the engine was idling, the rotational speed would be unstable (rough idle) due to insufficient output, causing engine vibration, starting stall, natural stall, etc. There is.

Therefore, in an automobile equipped with an air conditioner, a fast idle device is incorporated to rotate at a speed higher than a normal idling speed. There are various methods for fast idle. For example, in a gasoline engine, a method of opening a throttle valve with an electromagnetic motor or diaphragm valve, or an ISC system (idle speed control system) is used. Has been done. In addition, in diesel engines, a method is adopted in which a diaphragm valve or the like is used to pull the lever position of the fuel injection pump of the engine in the direction of increasing the injected fuel.

FIG. 2 is a diagram showing a conventional fast idle device. In FIG. 2, 1 is a power supply terminal, 2 and 3 are fuses, 4 is a changeover switch, 5 is an air conditioner blower motor, 6 is an air conditioner switch, 7 is an air conditioner relay, 7-1 is a relay coil, 7-2 is a relay contact, 8 is an air conditioner cut switch, 9 is an evaporator thermo switch, 10 is a receiver tank pressure switch, 11 is a compressor, and 12 is a fast idle part.

The changeover switch 4 is for changing the air flow rate of the blower motor 5 for the air conditioner. The air conditioner cut-off switch 8 is automatically turned off when the engine is started or when the accelerator is fully depressed and the load is reduced to disconnect the air conditioner and reduce the engine load. The evaporator thermoswitch 9 is turned off when the evaporator temperature becomes equal to or higher than a predetermined temperature, and the receiver tank pressure switch 10 is turned off when the pressure in the receiver tank becomes equal to or higher than a predetermined pressure. These are for stopping the operation of the air conditioner when an abnormal situation occurs.

As the first idle unit 12, for example, an electromagnetic motor (step motor) can be used. The first idle section 12 is connected in parallel with the compressor 11 for the air conditioner, and is structured so as to be operated when the compressor 11 is operated. Therefore, the idling state when the air conditioner was operating was always the first idle state, and it was avoided that a start stall or the like would occur.

As a conventional document relating to the fast idle device, there is, for example, Japanese Utility Model Laid-Open No. 55-144822.

[0008]

[Problems to be solved by the device]

 (Problem) However, the above-described conventional fast idle device has the following problems. The first problem is that it makes the engine braking less effective. The second problem is that fuel is wasted during deceleration. Exhaust gas will increase as much as it is wasted.

(Explanation of Problems) First, the first problem will be described. As described in FIG. 2, the first idle section 12 is operated as long as the air conditioner is operating. When the engine brake is applied, the air conditioner is not turned off one by one, so it works even when the engine is braked. Therefore, injecting extra fuel by the first idle is nothing but a function against engine braking, and deteriorates the effect of engine braking.

Next, the second problem is that at the time of deceleration, the original operation should be to reduce the injected fuel, but since the fast idle part 12 is still operating with the air conditioner, The fuel injection amount due to this is not reduced. As a result, fuel is wasted, and the amount of exhaust gas also increases. The present invention aims to solve the above problems.

[0011]

[Means for Solving the Problems]

 In order to solve the above problems, in a fast idle device of the present invention, a deceleration state detection means for detecting that a vehicle is in a deceleration state, and a fast idle relay that is turned off when the deceleration state detection means detects deceleration. And a first idle part connected in parallel to the compressor of the air conditioner via the first idle relay.

[0012]

[Work]

 In a vehicle equipped with an air conditioner, deceleration state detection means for detecting that the vehicle is in a deceleration state is provided, and a fast idle unit is connected in parallel to the air conditioner compressor via a relay. When the deceleration state is detected, the relay is turned off. As a result, it becomes possible to stop the operation of the fast idle part in the decelerating state where it is not necessary to perform the fast idle but is harmful.

[0013]

【Example】

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a view showing a first idle device of the present invention. Reference numerals correspond to those in FIG. 2, 14 is a fast idle relay, 14-1 is a relay coil, 14-2 is a relay contact, 15 is a deceleration state detecting means, 16 is a transmission switch, and 17 is a clutch switch. , 18 are accelerator pedal switches.

The structure is different from the conventional example of FIG. 2 in that a fast idle relay 14 is interposed between the compressor 11 and the fast idle unit 12 so that the fast idle unit 12 is not operated during deceleration. is there. Since the operation of the part corresponding to FIG. 2 is the same, its explanation is omitted.

The relay coil 14-1 of the first idle relay 14 is connected to the deceleration state detecting means 15 and is energized when the deceleration state is detected. At that time, the normally closed relay contact 14-2 is turned off, and the power supply to the first idle section 12 is cut off. Therefore, the first idle section 12 stops operating, and the injected fuel is reduced by that amount. Since the deceleration state is one when the engine brake is applied, the operation of the fast idle unit 12 is stopped even during the engine break.

As a specific configuration example of the deceleration state detecting means 15, as shown in the figure, there is a transmission switch 16, a clutch switch 17, and an accelerator pedal switch 18 connected in series. When decelerating while the vehicle is running, the transmission gear is set to something other than neutral (→ transmission switch 16 on), the clutch pedal is not depressed (→ clutch switch 17 on), and the accelerator pedal is depressed. Not activated (→ accelerator pedal switch 18 on). That is, the deceleration state is detected by turning on all the switches in the deceleration state detection means 15. As a result, the relay coil 14-1 is energized and the relay contact 14-2 is turned off.

The configurations of the fast idle relay 14 and the deceleration state detecting means 15 are not limited to those shown in FIG. 1. In short, the operation of the fast idle unit 12 is stopped when the deceleration state is detected. Anything can be used as long as it does.

FIG. 3 shows another configuration example of the fast idle unit. Reference numeral 14-2 is the relay contact 14-2 of FIG. 1, 20 is a vacuum pump, 21 is a pipe, 22 is a vacuum switch valve, 23 is a diaphragm device, and 24 is a lever. The lever 24 is connected to a fuel injection pump (not shown).

When the relay contact 14-2 is turned on, the vacuum switch valve 22 transfers the vacuum from the vacuum pump 20 to the diaphragm device 23 via the pipe 21. The lever 24 is driven by the diaphragm device 23 and increases the injected fuel so as to realize the fast idle. When the relay contact 14-2 is turned off, the vacuum switch valve 22 is closed and the lever 24 is driven in the reverse direction. Therefore, the injected fuel is reduced.

[0020]

[Effect of the device]

 As described above, according to the fast idle device of the present invention, when the vehicle is in the deceleration state, the operation of the fast idle part is stopped, so that the effect of the engine brake is deteriorated and the fuel is wasted. It will not be consumed.

[Brief description of drawings]

FIG. 1 is a view showing a fast idle device of the present invention.

FIG. 2 is a diagram showing a conventional fast idle device.

FIG. 3 is a diagram showing another configuration example of a fast idle unit.

[Explanation of symbols]

 1 Power Terminal 2, 3 Fuse 4 Changeover Switch 5 Air Conditioner Blower Motor 6 Air Conditioner Switch 7 Air Conditioner Relay 8 Air Conditioner Cut Switch 9 Evaporator Thermo Switch 10 Receiver Tank Pressure Switch 11 Compressor 12 First Idle Section 14 Fast Idle Relay 15 Deceleration State Detection Means 16 Transmission Switch 17 Clutch switch 18 Accelerator pedal switch 20 Vacuum pump 21 Pipe 22 Vacuum switch valve 23 Diaphragm device 24 Lever

Claims (1)

[Scope of utility model registration request] 1. A deceleration state detection means for detecting that a vehicle is in a deceleration state, a fast idle relay turned off when the deceleration state detection means detects deceleration, and a fast idle for a compressor of an air conditioner. A fast idle device comprising a fast idle unit connected in parallel via a relay.