JP2623944B2 - Air conditioner drive for vehicle air conditioner - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a vehicle air conditioner compressor drive device for driving an air conditioner compressor mounted on a vehicle such as an automobile.

[Conventional technology]

2. Description of the Related Art Conventionally, a main shaft of a compressor for an air conditioner of a vehicle is rotated by rotation of a crank pulley fixed to the main shaft.

However, the crank pulley provided on the main shaft of the air conditioner compressor is connected by a belt to a drive pulley interlocking with a drive pulley provided at the front end of the engine crankshaft to drive the rotation of the engine crankshaft. Source. Therefore, it is necessary to set the horsepower of the engine to include the horsepower for driving the air conditioner compressor. That is, the load on the entire engine increases in order to drive the compressor for the air conditioner, and as a result, the fuel consumption of the engine increases. In addition, there has been a problem that the engine speed is increased mainly in order to improve the cooling capacity, which further deteriorates the fuel efficiency of the vehicle.

As shown in FIG. 6, a compressor pulley 80 for an air conditioner, a water pump pulley 82, an alternator pulley 84 and a power steering pump pulley 86 are respectively connected to a drive pulley (drive pulley) 9 of a crankshaft 88A of an engine 88.
The air conditioner compressor pulley 80 for driving the air conditioner compressor having the maximum load torque is distributed approximately equally to the left and right around a driven pulley (driven pulley) 94 connected to a timing belt 92 by an engine 88.
A compressor driving device for an air conditioner provided at a position where the driving force of the air conditioner is transmitted first is disclosed (Japanese Utility Model Laid-Open No. 63-1107).
No. 52).

However, in this air conditioner compressor drive device, the load torque balance for the drive belt 98 connecting the driven pulley 94 and each pulley is improved, but the horsepower for driving the air conditioner compressor of the engine 88 is reduced. Does not reach.

[Problems to be solved by the invention]

In view of the above, the present invention reduces the horsepower of an engine used to drive an air conditioner compressor, thereby reducing the horsepower of the entire engine and improving the fuel efficiency of the vehicle. The aim is to obtain a compressor drive.

[Means for solving the problem]

The present invention is a compressor drive device for an air conditioner in which a main shaft is rotated by engine power, and is provided with an auxiliary turbine connected to the main shaft, engine oil pumped by an engine oil pump, and a power steering oil pump. A bypass path for circulating at least one of the power steering oil, oil branch means provided on the bypass path, and one end connected to the oil branch means and the auxiliary turbine connected to the other end. An oil supply passage provided with an oil injection port disposed toward the auxiliary turbine, and an oil recovery port for recovering oil injected to the auxiliary turbine is provided at one end and the other end is provided with the bypass. An oil recovery path connected downstream of the oil branching means of the path;
An oil branching means control device for switching the oil branching means based on predetermined conditions to supply oil to the oil supply path.

[Action]

According to the present invention, when a predetermined condition is satisfied, for example, when the engine speed is equal to or higher than a predetermined rotational speed and the air conditioner switch is turned on, the oil branching means is switched by the oil branching means control device, and the engine oil flowing through the bypass path is And power steering oil are supplied to the oil supply path. As a result, oil is injected from an oil injection port provided at one end of the oil supply path toward an auxiliary turbine connected to a main shaft of the air conditioner compressor. Turbine rotation is encouraged. Therefore, the horsepower of the engine for rotating the main shaft of the air conditioner compressor can be reduced,
The horsepower of the entire engine can be reduced, and the fuel efficiency of the vehicle can be improved.

The oil injected into the auxiliary turbine is recovered from an oil recovery port in the oil recovery path, and is returned to the downstream side of the oil branching means in the bypass path.

Further, as means for assisting the driving force by the engine power, relief oil pressure wasted by a hydraulic pump (at least one of an engine oil pump and a power steering oil pump) is used for driving the compressor as an auxiliary force. Therefore, there is no need to increase the capacity of the hydraulic pump, and the compressor does not stop during steering or the like.

〔Example〕

Hereinafter, a first embodiment of a compressor driving device for an air conditioner of a vehicle according to the present invention will be described with reference to FIGS.

 The direction of arrow A in the drawing indicates the direction of oil flow.

As shown in FIG. 1, an oil pan 12 is provided at a lower portion of the engine 10, and inside the oil pan 12,
Engine oil 14 is filled. Also an oil pan
Inside 12 is inserted the other end of a pipe 18 whose one end communicates with an engine oil pump 16.

A crank pulley 19 is coaxially fixed to a crank shaft 10A of the engine 10, and an engine oil pump 16 is connected thereto. Therefore, the rotation of the crankshaft 10A of the engine 10 causes the engine oil pump 1 to rotate.
6 rotates, which causes the engine oil 14 to
Through the oil pan 12 to circulate and lubricate and cool the various parts of the engine 10.

One end of a bypass pipe 24 serving as a bypass path is connected to the output side of the engine oil pump 16, and the other end of the bypass pipe 24 is connected to an oil pan.
Connected to 12. An intermediate portion of the bypass pipe 24 is provided with a bypass valve 26 as oil branching means. The bypass valve 26 is connected to one end of an oil supply pipe 28 as an oil supply path. I have. The other end of the oil supply pipe 28 is connected to an oil reservoir 30A of a compressor 30 for an air conditioner (hereinafter referred to as a compressor). The oil reservoir 30A is provided on the opposite side (rear part) of the compressor 30 from the drive pulley 31 and is a separate chamber so that the engine oil 14 does not mix with the refrigerant.

The bypass valve 26 is connected to an electronic control unit (hereinafter, referred to as an ECU) 32 as an oil branching means control unit, and is controlled to be switched by the ECU 32 based on predetermined conditions.

As shown in FIG. 3, this ECU 32 has an engine 10
A well-known rotation sensor 34 that is disposed adjacent to the crank pulley 19 and detects the rotation speed of the engine 10 is connected thereto, and receives the rotation speed of the engine 10. Also, EC
An on / off switch 36 of the air conditioner is connected to U32 so that the ECU 32 can determine whether the air conditioner is on. The crank pulley 19 of the engine 10 is connected to the drive pulley 31 of the compressor 30 by a belt 22.

As shown in FIG. 2, a rear end 38A of a main shaft 38 of the compressor 30 projects from an oil reservoir 30A of the compressor 30 for an air conditioner.
A turbine blade 400 as an auxiliary turbine is coaxially fixed. The turbine blade 40 is made of a lightweight material such as aluminum, magnesium, and titanium, and has a very small rotation loss.

In the vicinity of the turbine blade 40, the oil supply pipe 28
An oil jet 28A serving as an oil injection port is provided at the end of the oil jet. The oil jet 28A has a position and a direction in which the turbine oil 40 rotates in the rotation direction of the main shaft 38 of the compressor 30 (clockwise rotation in FIG. 2) by the engine oil 14 injected from the oil jet 28A.

An oil recovery port 42A provided at one end of a return pipe 42 as an oil recovery path is connected to a lower portion of the oil reservoir 30A of the compressor 30, and the other end of the return pipe 42 is The bypass pipe 24 is connected to the downstream side of the bypass valve 26. Accordingly, the engine oil 14 in the oil sump 30A of the compressor 30 is
The oil pan of the engine 10 through the return pipe 42
It is to be collected at 12.

Also, as shown in FIG. 3, the on / off switch 36 of the air conditioner is connected to a magnetic clutch switch 44. The magnetic clutch switch 44 controls a magnetic clutch (not shown) interposed in a connecting portion between the main shaft 38 of the compressor 30 and the driving pulley 31. When an air conditioner is used, the main clutch 38 of the compressor 30 is driven. Pulley
31 is connected.

 Hereinafter, the operation of the present embodiment will be described.

According to the present embodiment, the rotation of the crank pulley 19 of the engine 10 rotates the engine oil pump 16, whereby the engine oil 14 is pumped from the oil pan 12 through the pipe 18 and circulates and cools each part of the engine 10. I do. At the same time, the engine oil 14 pumped from the oil pan 12 circulates in the bypass pipe 24.

When the on / off switch 36 of the air conditioner is turned on while the engine oil 14 is circulating in the bypass pipe 24, the magnetic clutch switch 44 is turned on. Thereby, the main shaft 38 of the compressor 30 and the driving pulley
31 is connected to the main shaft 38 of the compressor 30 by rotation of the crank pulley 19 of the engine 10.
Starts to rotate.

Also, when the on / off switch 36 of the air conditioner is turned on, the ECU 32 starts the engine 1 based on the detection value of the rotation sensor 34.
It is determined whether the rotation speed of 0 is equal to or higher than a predetermined rotation speed (for example, 1000 rpm). If the rotation speed of the engine 10 is equal to or higher than the predetermined rotation speed, the bypass valve 26 is switched. As a result, the engine oil 14 passes through the oil supply pipe 28,
Oil is jetted from the oil jet 28A to the turbine blade 40, and the hydraulic pressure assists the rotation of the main shaft 38 of the compressor 30.

Therefore, the rotational load of the main shaft 38 of the compressor 30 applied to the crank pulley 19 of the engine 10 is reduced, and the horsepower of the engine 10 for driving the compressor 30 can be reduced. Therefore, the horsepower of the entire engine 10 can be reduced, and the fuel efficiency of the vehicle can be improved.

The engine oil 14 in the oil reservoir 30A of the compressor 30 flows into the return pipe 42 from the oil recovery port 42A of the return pipe 42, and is recovered by the oil pan 12 via the return pipe 42.

The maximum work amount of the engine oil pump 16 is determined by the high oil temperature, the maximum oil flow rate at high speed rotation, the maximum oil discharge amount at low temperature, and the like.
At a rotational speed of 2500 rpm or less), most of the work of the engine oil pump 16 is considered to be wasted work. Therefore, with the configuration of the present embodiment, the maximum work of the engine oil pump 16 does not increase, and the fuel efficiency of the vehicle does not decrease.

In this embodiment, the acceleration of the vehicle body and the cooling power of the air conditioner can be increased. Furthermore, since the pulley ratio of the compressor 30 can be increased, the rotation of the compressor 30 does not increase excessively, and the compressor 30 can always be used in an efficient rotation region. , Acceleration and the like are improved.

Also, since the efficiency of the air conditioner can be increased, the capacity of the compressor 30 can be reduced and the weight can be reduced.
The installation of the air conditioner is improved. In addition, the vibration and noise of the entire vehicle body can be reduced as the idle-up rotation of the engine decreases.

Hereinafter, a second embodiment of a compressor driving device for an air conditioner of a vehicle according to the present invention will be described with reference to FIG.

The same members as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

As shown in FIG. 4, the crank pulley of the engine 10
A reservoir tank 52 filled with power steering oil 51 is connected to a downstream side of a power steering oil pump 50 connected to the pump 19 via a belt (not shown). A steering gear box 54 is connected downstream of the reservoir tank 52. Therefore, the power steering oil 51 is a pump for the power steering oil.
By driving the 50, the reservoir tank 52 and the steering gear box 54 circulate.

One end of a bypass pipe 56 as a bypass path is connected between the reservoir tank 52 and the steering gear box 54, and the other end of the bypass pipe 56 is connected to the steering gear box 54 and the power steering. It is connected to the oil pump 50. Also,
A bypass valve 26 is provided at an intermediate portion of the bypass pipe 56, and one end of an oil supply pipe 28 is connected to the bypass valve 26. The other end of the oil supply pipe 28 is connected to a compressor 30 for an air conditioner.
Is connected to the oil reservoir 30A.

An oil recovery port 58A provided at one end of a return pipe 58 as an oil recovery path is connected to a lower portion of the oil reservoir 30A of the compressor 30, and the other end of the return pipe 58 is The bypass pipe 56 is connected to the downstream side of the bypass valve 26. Accordingly, the power steering oil 51 in the oil reservoir 30A of the compressor 30 flows into the return pipe 58 from the oil recovery port 58A, returns to the bypass pipe 56 via the return pipe 58, and is recovered by the power steering oil pump 50. It has become.

The bypass valve 26 is connected to the ECU 32 and the ECU 32
Switching control. This ECU32
Is connected to a well-known rotation sensor 34 for detecting the rotation speed of the engine 10, and receives the rotation speed of the engine 10. Further, an on / off switch 36 of the air conditioner is connected to the ECU 32, and whether or not the air conditioner is on is input. Further, the ECU 32 is connected to a vehicle speed sensor 60 and a hydraulic pressure sensor 62 provided in the power steering oil pump 50.

 Hereinafter, the operation of the present embodiment will be described.

According to the present embodiment, the rotation of the crank pulley 19 of the engine 10 causes the power steering oil pump 50 to rotate, whereby the power steering oil 51 circulates between the reservoir tank 52 and the steering gear box 54. At the same time, the power steering oil 51 circulates in the bypass pipe 56.

Power steering oil 51 is passed through this bypass pipe 56.
When the on / off switch 36 of the air conditioner is turned on in a state where air is circulating, the magnet clutch switch 44 is turned on.
Turns on. As a result, the main shaft 38 of the compressor 30 and the drive pulley 31 are connected by a magnetic clutch,
The rotation of the crank pulley 19 causes the main shaft 38 of the compressor 30 to start rotating.

Also, when the on / off switch 36 of the air conditioner is turned on, the ECU 32 starts the engine 1 based on the detection value of the rotation sensor 34.
It is determined whether or not the rotation speed of 0 is equal to or higher than a predetermined rotation speed (for example, 1000 rpm), and whether or not the vehicle speed is equal to or higher than a predetermined value is determined based on the detection value of the vehicle speed sensor 60. It is determined whether or not the hydraulic pressure of the power steering oil 51 whose required hydraulic pressure corresponding to the rotation angle has been reduced is equal to or greater than a predetermined value.

As a result, the ECU 32 operates the air conditioner on / off switch 36.
Is turned on, the rotation speed of the engine 10 is equal to or higher than a predetermined rotation speed (for example, 1000 rpm), and the vehicle speed is a predetermined speed (for example, 10 km /
h) If the oil pressure of the power steering oil 51 is equal to or higher than a predetermined value, the bypass valve 26 is switched to allow the power steering oil 51 to be discharged through the pipe 28 through the oil jet.
Inject from 28A to turbine blade 40. Thereby, the rotation of the main shaft 38 of the compressor 30 is promoted.

Therefore, the rotational load of the main shaft 38 of the compressor 30 applied to the crank pulley 19 of the engine 10 is reduced, and the horsepower of the engine 10 for driving the compressor 30 can be reduced. Therefore, the horsepower of the entire engine 10 can be reduced, and the fuel efficiency of the vehicle can be improved.

The power steering oil 51 in the oil reservoir 30A of the compressor 30 is returned to the bypass pipe 56 via the return pipe 58, and is collected by the power steering oil pump 50.

The maximum work amount of the power steering oil pump 50 is determined by the oil flow rate at the time of the maximum stationary operation in the idle operation state (the oil flow rate when the steering wheel is turned at the maximum angle while the vehicle is not running). For this reason, the normal running speed (vehicle speed of 10 km / h or more) and the steering normal rotation angle (0
In (1) to (9), most of the work of the power steering oil pump 50 is regarded as wasted work. Therefore,
With the configuration of the present embodiment, the maximum work of the power steering oil pump 50 does not increase, and the fuel efficiency of the vehicle does not decrease. In addition, the compressor does not stop even during steering.

Hereinafter, a third embodiment of a compressor driving device for an air conditioner of a vehicle according to the present invention will be described with reference to FIG.

The same members as those in the first and second embodiments are denoted by the same reference numerals, and description thereof will be omitted.

As shown in FIG. 5, the oil reservoir 3A is located on the rear side (right side in FIG. 5) of the oil reservoir 30A of the compressor 30.
An oil reservoir 30B is provided separately from 0A. The rear end portion 38A of the main shaft 38 of the compressor 30 projects from the oil sump portion 30B.
A turbine blade 64 is coaxially fixed to 8A. The turbine blade 64 is made of a lightweight material such as aluminum, magnesium, and titanium, and has a very small rotation loss.

Further, the engine oil 14 is injected to the turbine blade 64 by an oil jet 28A, and the power steering oil 51 is injected to the turbine blade 64 by the oil jet 28A.

Therefore, in this embodiment, by the control of the ECU 32,
Depending on the use condition of the air conditioner, the rotation of the main shaft 38 of the compressor 30 can be promoted by using one or both of the engine oil 14 and the power steering oil 51.
Therefore, the rotational load on the main shaft 38 of the compressor 30 due to the rotation of the crank pulley 20 of the engine 10 is further reduced,
The horsepower of the engine 10 for driving the compressor 30 can be further reduced. Therefore, the horsepower of the entire engine 10 can be further reduced, and the fuel efficiency of the vehicle can be further improved.

〔The invention's effect〕

Since the present invention is configured as described above, an excellent effect that the horsepower of the engine used to drive the compressor for the air conditioner is reduced, thereby reducing the horsepower of the entire engine and improving the fuel efficiency of the vehicle. Having. Also, there is no need to increase the capacity of the hydraulic pump,
In addition, there is an excellent effect that the compressor does not stop at the time of steering or the like.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing an entire system of a compressor driving device for an air conditioner of a vehicle according to a first embodiment of the present invention, FIG. 2 is a sectional view taken along the line 2-2 of FIG. 1, and FIG. FIG. 4 is a schematic view of an engine to which a compressor driving device for an air conditioner of a vehicle according to an embodiment is applied, as viewed from the front. FIG. FIG. 5 is an explanatory view showing a part of a system of a compressor driving device for an air conditioner of a vehicle according to a third embodiment of the present invention, and FIG. 6 is a diagram showing an engine to which a compressor driving device for an air conditioner of a conventional example is applied. It is the schematic diagram seen from the front. 10… Engine, 14… Engine oil, 16… Engine oil pump, 24, 56… Bypass pipe (bypass path), 26 …… Bypass valve (oil branching means), 28 …… Oil supply pipe (oil) Supply route), 28A ... oil jet, 30 ... air conditioner compressor, 32 ... ECU (oil branching means control device), 38 ... main shaft, 40, 64 ... turbine blade (auxiliary turbine), 42, 58 ... Return pipe (oil recovery path), 42A, 58A ... Oil recovery port, 50 ... Power steering oil pump, 51 ... Power steering oil.

Claims (1)

(57) [Claims] 1. A compressor drive device for an air conditioner in which a main shaft rotates by engine power, comprising: an auxiliary turbine connected to the main shaft; engine oil pumped by an engine oil pump; and a pump for power steering oil. A bypass path for circulating at least one of the power steering oil, oil branching means provided in the bypass path, and one end connected to the oil branching means and the auxiliary branch connected to the other end. An oil supply path provided with an oil injection port disposed toward the turbine, and an oil recovery port for recovering oil injected into the auxiliary turbine at one end, and the other end provided with an oil recovery port. An oil circuit path connected downstream of the oil branching means of the bypass path;
An oil branching means control device for switching the oil branching means based on a predetermined condition to supply oil to the oil supply path, and a compressor driving device for an air conditioner of a vehicle.