JPS6144512Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention is a controller for an air conditioner installed in a vehicle equipped with an automatic transmission. In particular, when the temperature inside the vehicle exceeds a reference temperature, the engine idles up and the air conditioner cools. The present invention relates to a controller for an air conditioner that can operate a compressor installed during a cycle.

In order to reduce vehicle fuel consumption, the idling speed of the engine is kept to a very low speed, but if the vehicle air conditioner is activated while the engine is idling, such as during traffic jams, the engine speed may drop. Since the number is low, the problem arises that the air conditioner cannot sufficiently cool the vehicle interior.

Therefore, when the air conditioner is activated, the idle speed of the engine is increased by 200 to 300 RPM to increase the speed of the compressor installed in the air conditioner's refrigeration cycle. Previous efforts have been made to improve air conditioning capacity.

However, in vehicles equipped with automatic conversion devices,
If the vehicle is temporarily stopped and the gear shift lever is held in the driving range, the air conditioning system is activated and the idle speed of the engine increases, causing the vehicle to start moving (creep), so the driver must apply the brakes firmly. Therefore, the comfort of easy driving, which has conventionally been a feature of vehicles with automatic transmissions, is impaired, and depending on the vehicle, the vehicle body may vibrate at this time, causing discomfort to the driver. There was a problem.

The present invention has been made in view of the above-mentioned conventional problems, and its purpose is to provide a controller for an air conditioner that can improve the comfort of a vehicle equipped with an automatic transmission and an air conditioner. There is a particular thing.

In order to achieve the above object, the present invention includes a room temperature detector that detects the temperature inside the vehicle interior, and a system that idles up the engine when the detected room temperature value exceeds a reference temperature value and cools the vehicle air conditioner. In a controller for a vehicle air conditioner, the controller includes a control circuit for outputting control signals for idle up and compressor operation to operate a compressor provided during a cycle, in which a shift lever of an automatic transmission is held in a driving range. A shift lever state detector detects that the vehicle is stopped, and a vehicle stop state detector detects that the vehicle is stopped, and the control circuit receives a shift lever state detection signal and a vehicle stop state detection signal. The present invention is characterized in that when the shift lever of the automatic transmission is held in the travel range and the vehicle is stopped, the idle-up control signal is disabled to prohibit engine idle-up.

Preferred embodiments of the controller according to the present invention will be described below based on the drawings.

In FIG. 1, the controller of this embodiment controls engine idle up when a room temperature detector 10 detects the temperature inside the vehicle and a room temperature detection value 100 output from the room temperature detector 10 exceeds a reference temperature value 102. It also has a control circuit 12 for operating a compressor provided in the refrigeration cycle of the vehicle air conditioner.

The room temperature detector 10 includes a resistor 14 and a thermistor 1.
It consists of 6 series circuits and is supplied with DC voltage from a battery. The thermistor 16 is provided inside the vehicle, and its resistance value changes depending on the temperature inside the vehicle, and the detected room temperature value 100 is taken from its high potential side.

The control circuit 12 also includes the room temperature detection value.
Comparator 1 with 100 supplied to one comparison input
8 is provided, and the other input of the comparator 18 is supplied with a reference temperature value 102 obtained by dividing the output voltage of the battery using a resistor 20 and a regulator 22. This comparator 18 is connected to the resistor 2 when the temperature inside the vehicle increases and the detected room temperature value 100 exceeds the reference temperature value 102.
0. When the voltage falls below the divided voltage of the volume 22, the control circuit 104 can output an H level. The control signal 104 is output from the control circuit 12 via the AND gate 24 and the amplifier 20, and the control circuit 104 causes the refrigerant gas provided in the refrigeration cycle of the air conditioner to be sucked and compressed to circulate the refrigerant. The electromagnetic clutch of the cooler compressor is turned on, and the idle-up valve provided in the carburetor of the engine is turned on, operating the compressor and raising the idle of the engine. In this way, in this embodiment, the same control signal 104 is used as the control signal for operating the idle-up compressor.

Here, the present invention is provided with a shift lever state detector that detects that the shift lever of the automatic transmission is held in the driving range and a vehicle stop state detector that detects that the vehicle is stopped. Therefore, in this embodiment, these shift lever state detector and vehicle stop state detector are constructed as follows.

In FIG. 1, the shift lever state detector 2
8 consists of an interlocking switch 32 that is interlocked with the shift lever 30 of the automatic transmission and is turned off when the shift lever 30 is held in the 1, 2, D, or R travel range, and a resistor 34 connected in series with the interlock switch 32. The gear shift lever state detection signal 106 is taken out from the high potential side of the resistor 34.

Further, the vehicle stop state detector 36 is operated by an interlocking switch 40 interlocking with a foot brake pedal 38.
and an interlocking switch 44 interlocking with a handbrake lever 42, the interlocking switch 40 interlocking with a resistor 4.
6 and the interlock switch 44 is grounded via a resistor 48. The vehicle detection state detection signal is the detection signal 108, 110 taken out from each high potential side of the resistors 46, 48.
Consists of.

Detection signal 10 of the shift lever state detector 28
6 is supplied to a NAND gate 54 via an inverter 50, and the vehicle stop state detector 36 and detection signals 108, 110 are supplied via an OR gate 52. Therefore, when the shift lever 30 is held in the driving range (1, 2, D, R in this embodiment), the H detection signal 106 is output, and when the foot brake pedal 38 is depressed or the hand brake lever 42 is operated. When this occurs, an H detection signal 108 or 110 is supplied to the NAND gate 54. NAND output 11 of this NAND gate 54
2 is supplied to the AND gate 24, the control signal 104 is supplied to the NAND output 11 when the gear shift lever 30 is held in the travel range and the brake is activated to stop the vehicle.
2 interrupts the AND gate 24, thereby inhibiting engine idle up and compressor operation.

As described above, in this embodiment, when the shift lever 30 is held in a range other than the P range or the N range, it is determined that the shift lever 30 is held in the driving range, and the brake is not activated. The control circuit 12 interrupts the control signal 104 to stop the engine when it is determined that the shift lever 30 is held in the travel range and the vehicle is stopped. In addition to prohibiting idle up, the operation of the compressor is also prohibited.

A preferred embodiment of the present invention has the above configuration,
The effect will be explained below.

When the vehicle is stopped by operating at least one of the foot brake pedal 38 and the hand brake lever 42 while the gear shift lever 30 is held in the driving range, the NAND output 112 is at L, so the AND gate 24 is Since the gate is closed, the control signal 104 is output from the control circuit 12 even if the temperature inside the vehicle increases and the control signal 104 is applied from the comparator 18 to the AND gate 24. Therefore, in this embodiment, the gear shift lever 3
When the vehicle is stopped with 0 being held in the travel range, engine idling up and compressor operation are prohibited.

As explained above, according to the present invention, when the vehicle is stopped with the gear shift lever being held in the driving range, the engine is prevented from idling up, thereby preventing the vehicle from creeping or creeping. the vehicle will not vibrate,
Therefore, it is possible to drive comfortably.

Furthermore, according to the embodiment, since the operation of the air conditioner is also prevented in addition to preventing the engine from increasing in idle speed, in a vehicle where the idle speed of the engine is set to be low, an increase in engine load due to the start of operation of the air conditioner can be avoided. It is also possible to prevent engine stalling from occurring.

In the above embodiment, the stopped state of the vehicle is detected by the operation of the brake, but the stopped state of the vehicle may be detected from the speed detection signal of the vehicle.

Furthermore, in the embodiment described above, when the brake is operated while the vehicle is changing gears, the engine is not idle-up, so it is possible to improve the effectiveness of the engine brake.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a preferred embodiment of the present invention. 10... Room temperature detector, 12... Control circuit, 28
8... Gear shift lever state detector, 30... Gear shift lever, 36... Vehicle stop state detector, 38... Foot brake pedal, 42... Side brake lever.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A room temperature detector that detects the temperature inside the vehicle, and a refrigeration cycle for the vehicle air conditioner that idles up the engine when the detected room temperature exceeds a reference temperature value. a control circuit that outputs control signals for idle up and compressor operation to operate a compressor provided therein;
A controller for a vehicle air conditioner having a shift lever state detector that detects that the shift lever of the automatic transmission is held in a driving range, and a vehicle stop state detector that detects that the vehicle is stopped. and the control circuit generates an idle up control signal when the shift lever of the automatic transmission is held in the driving range and the vehicle is stopped based on the shift lever state detection signal and the vehicle stop state detection signal. A controller for a vehicle air conditioner, characterized in that it disables engine idle up. (2) In the controller according to claim (1) of the utility model registration, when the control circuit disables the idle up control signal, the control circuit also disables the compressor operation control signal and prohibits the operation of the compressor at the same time. A controller for a vehicle air conditioner, characterized by: