JP2006207468A - Accessary drive device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable installation in a limited installation space and secure cooling capacity in all operation range of a power source. <P>SOLUTION: This accessory drive device 100 includes a compressor 20 compressing refrigerant F for air conditioner mounted on a vehicle and a water pump 10 circulating cooling water W for cooling an internal combustion engine. The compressor 20 and a water pump 10 are driven by a common motor 7. The compressor 20 and the motor 7 are connected via a clutch 8C for the compressor, and the water pump 10 and the motor 7 are connected via a clutch 8W for the water pump. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a technique for driving a water pump by an electric motor.

  In an internal combustion engine, a water pump for circulating cooling water is generally driven by the internal combustion engine. In recent internal combustion engines, a water pump used for circulating cooling water is driven by an electric motor (for example, Patent Document 1). When the water pump is driven by the internal combustion engine, the discharge amount of the water pump depends on the engine speed of the internal combustion engine. However, when the water pump is driven by an electric motor, it is freed from dependence on the internal combustion engine, so that the degree of freedom in cooling control is increased.

JP 2004-268778 A

  By the way, in the technique disclosed in Patent Document 1, a large output is required for the electric motor in order to ensure the cooling capacity over the entire operation region of the internal combustion engine which is a power source by the water pump driven by the electric motor. The As a result, the size of the electric motor becomes large, making it difficult to mount the motor in a limited space, and limiting the arrangement of other devices. On the other hand, if the electric motor is downsized, the cooling capacity may be insufficient particularly when the internal combustion engine as a power source is operated at a high load.

  Therefore, the present invention has been made in view of the above, and an object of the present invention is to provide an accessory driving device that can be installed even in a limited installation space and can ensure cooling capacity in the entire operation region of the power source.

  In order to solve the above-described problems and achieve the object, an auxiliary device driving apparatus according to the present invention is driven by an electric motor to compress a refrigerant for an air conditioner mounted on a vehicle, and the compression Fluid circulation means for circulating a cooling fluid for cooling a cooling target device that needs to be cooled among devices mounted on the vehicle and driven by the electric motor that drives the machine. .

  This auxiliary machine drive device includes a drive source of a compressor that is provided in an air conditioner and compresses a refrigerant, and a drive reduction of a fluid circulation means that circulates a cooling fluid for cooling a power source to be cooled. , Shared by the same motor. Accordingly, it is not necessary to separately prepare a drive source for driving the compressor and a drive source for driving the fluid circulation means, and therefore, it can be mounted even in a limited space. Moreover, since the said motor has a big output in order to drive a compressor, it can ensure cooling capacity in the whole operation area | region of a power source.

  The auxiliary machine driving device according to the next aspect of the present invention is the compressor driving device in which the driving force transmitted to the compressor is intermittently provided at least between the electric motor and the compressor. An intermittent means is provided.

  The auxiliary drive apparatus according to the present invention is a fluid circulation means, wherein the drive force transmitted to the fluid circulation means is intermittently provided between the electric motor and the fluid circulation means in the accessory drive apparatus. Power continuity means is provided.

  The auxiliary machine drive device according to the present invention is the auxiliary machine drive device, wherein at least one of the rotation of the electric motor is between the electric motor and the compressor or between the electric motor and the fluid circulation means. An electric motor rotation speed changing means for changing and transmitting the number is provided.

  The auxiliary machine driving device according to the present invention is the auxiliary machine driving device, wherein at least one of the rotation of the electric motor is provided between the electric motor and the compressor or between the electric motor and the fluid circulation means. Transmission ratio variable means is provided, which transmits the transmission speed by changing the number and can change the transmission speed ratio of the motor.

  The auxiliary machine drive device according to the present invention can be mounted even in a limited installation space, and can secure a cooling capacity in the entire operation region of the power source.

  Hereinafter, the present invention will be described in detail with reference to the drawings. The present invention is not limited to the following examples. In addition, constituent elements in the following embodiments include those that can be easily assumed by those skilled in the art or those that are substantially the same. The present invention can be applied to any internal combustion engine having a plurality of spark plugs in the same combustion chamber, but can be preferably applied particularly to those mounted on a vehicle such as a passenger car, a bus, or a truck.

  The cooling target of the auxiliary drive device according to the present invention is mounted on, for example, an internal combustion engine that is mounted on a vehicle and serves as a power source, a generator mounted on a so-called hybrid vehicle, an electric motor as a power source, or an electric vehicle. Examples thereof include an electric motor as a power source and its control device. In the following description, the internal combustion engine is described as a cooling target. However, a generator mounted on a hybrid vehicle, an electric motor as a power source, and the like are not excluded, and the present invention can also be applied to these cooling targets.

  In the first embodiment, a fluid circulating means (for example, a water pump) that circulates a cooling fluid for cooling an object to be cooled and a compressor provided in an air conditioner mounted on a vehicle are driven by the same electric motor. There is a feature.

  FIG. 1 is an explanatory view showing an example in which the accessory driving apparatus according to this embodiment is applied to an internal combustion engine. In this embodiment, the internal combustion engine 1 is mounted on a vehicle such as a passenger car or a truck and serves as a power source. Since the internal combustion engine 1 generates heat during its operation, it is cooled by a cooling fluid (for example, water). An auxiliary machine drive device 100 according to this embodiment includes a water pump 10 that is a fluid circulation means provided in a cooling system of an internal combustion engine 1 and an air conditioner (hereinafter referred to as an air conditioner) mounted on a vehicle on which the internal combustion engine 1 is mounted. The compressor 20 included in 110 and the electric motor 7 serving as a drive source common to both are included.

  The cooling system of the internal combustion engine 1 includes a water pump 10, a thermostat 5, a radiator 11, and a cooling water flow path 18 that connects them. The internal combustion engine 1 causes cooling water, which is a cooling fluid, to flow through a cooling water passage provided in a cylinder block 2 and a cylinder head 3 that house cylinders, and moves generated heat to the cooling water. Although the internal combustion engine 1 includes a supercharger 4, the supercharger 4 is also cooled by the cooling water of the internal combustion engine 1.

  The water pump 10 is driven by the electric motor 7 to circulate cooling water for cooling the internal combustion engine 1 and the supercharger 4 in the cooling system of the internal combustion engine 1. At the time of cold start of the internal combustion engine 1, the internal combustion engine 1 is warmed up until the temperature of the cooling water rises to an appropriate value. At this time, since the thermostat 5 is closed, the cooling water flows bypassing the radiator 11 (cooling water flow path 18 shown by a solid line in FIG. 1). As a result, the temperature of the cooling water is quickly raised to an appropriate value. When the temperature of the cooling water of the internal combustion engine 1 rises to an appropriate value, the thermostat 5 is opened. Then, the cooling water of the internal combustion engine 1 flows through the radiator 11 which is a heat radiating means (cooling water flow path 18 shown by a broken line in FIG. 1), and the heat of the cooling water is radiated from the radiator 11 to the atmosphere. Note that an evaporator 23 provided in the air conditioner 110 is disposed in front L of the radiator 11.

  The air conditioner 110 includes a compressor 20, a condenser 21, an expansion valve 22, an evaporator 23 mainly used for cooling, and a heater core 24 mainly used for heating. The evaporator 23 and the heater core 24 constitute the air conditioning unit 6 and adjust the temperature and humidity of the air introduced into the vehicle compartment. The compressor 20, the condenser 21, the expansion valve 22, and the evaporator 23 are respectively connected by a refrigerant pipe 25 to constitute a refrigerant circuit. The refrigerant circulates in the refrigerant circuit. And the said refrigerant | coolant circulates, changing the phase of a refrigerant | coolant in apparatuses, such as the compressor 20 and the condenser 21 which comprise a refrigerant circuit.

  The evaporator 23 provided in the air conditioning unit 6 is a heat exchanger, and the refrigerant adiabatically expanded by the expansion valve 22 is introduced and evaporated. When the refrigerant evaporates, the heat of vaporization is taken away, so the temperature of the evaporator 23 decreases. Thereby, the air passing through the evaporator 23 is cooled. The heater core 24 provided in the air conditioning unit 6 is a heat exchanger, and the cooling water after cooling the internal combustion engine 1 and the supercharger 4 is guided to heat the air introduced into the vehicle compartment. In the air conditioning unit 6, the temperature in the vehicle compartment is adjusted by changing the mixing ratio of the air cooled by the evaporator 23 and the air heated by the heater core 24. Next, the accessory drive device 100 according to this embodiment will be described in detail.

  FIG. 2 is an explanatory view showing an accessory driving device according to this embodiment. The internal combustion engine 1 is mounted on a vehicle and drives it. That is, the internal combustion engine 1 is a power source for the vehicle on which it is mounted. Here, when the internal combustion engine 1 is operated, a water pump 10 that circulates the cooling water W, an oil pump that circulates the lubricating oil of the internal combustion engine 1, and the like are required. Further, when driving a vehicle on which the internal combustion engine 1 is mounted, a power steering pump for supplying hydraulic pressure to the power steering and an oil pump for generating hydraulic pressure for controlling the automatic transmission are required. Furthermore, when the air conditioner 110 is mounted on a vehicle, the compressor 20 and the like in which the refrigerant F is circulated in the air conditioner 110 are necessary.

  Thus, although the direct power source of the vehicle on which the internal combustion engine 1 is mounted is the internal combustion engine 1, as described above, there are devices necessary for driving the vehicle on which the internal combustion engine 1 is mounted. These are called auxiliary machines (vehicle auxiliary machines). The accessory driving apparatus 100 according to this embodiment drives such an accessory, and in particular, a water pump 10 that circulates the cooling water W of the internal combustion engine 1 in the cooling system of the internal combustion engine 1, The compressor 20 which circulates the refrigerant | coolant F in the air conditioner 110 is made into the object of a drive.

  In the accessory driving apparatus 100 according to this embodiment, as shown in FIG. 2, the compressor 20 as an accessory and the water pump 10 as an accessory are driven by the same electric motor 7. That is, the drive source of the compressor 20 and the water pump 10 is shared by the same electric motor 7. As a result, it is not necessary to prepare a drive source for driving the compressor 20 and a drive source for driving the water pump 10 separately, so that even a limited space can be easily mounted. it can. That is, the degree of freedom when mounting the accessory driving device 100 is improved. At the same time, it is possible to reduce the mass and manufacturing cost of the auxiliary machine driving device 100 and reduce the number of driving sources, thereby reducing the maintenance and inspection work.

  Moreover, in order to drive the compressor 20 of the air conditioner 110, a certain amount of output is required, which is larger than the output for driving the water pump 10. Therefore, if the water pump 10 is driven by the electric motor 7 that can drive the compressor 20, even if the internal combustion engine 1 that is a power source is operated at a high load, sufficient cooling water is circulated to provide sufficient cooling capacity. It can be secured. As a result, in the auxiliary machine drive device 100 according to this embodiment, sufficient cooling capacity can be ensured in the entire operation region of the internal combustion engine 1 that is the power source.

  Thus, when the compressor 20 of the air conditioner 110 is driven by the electric motor 7, the auxiliary device driving apparatus 100 according to this embodiment uses the electric motor 7 that drives the compressor 20 as a drive source of the water pump 10. Thus, both space saving and sufficient cooling capacity can be ensured. In general, when a compressor of an air conditioner mounted on a vehicle is driven by an electric motor, a power source for driving the electric motor is a high voltage (several tens of volts to several hundreds of volts) in order to ensure sufficient output. Thereby, when the compressor of the air conditioner mounted on the vehicle is driven by an electric motor, a large output can be obtained even if the electric motor has a relatively small size. As a result, in the auxiliary machine driving device 100 according to this embodiment, further space saving can be achieved.

  Vehicles that drive a compressor of an air conditioner with an electric motor include, for example, a so-called hybrid vehicle including an internal combustion engine and a driving electric motor, and a so-called electric vehicle. Further, in a vehicle having a so-called idling stop function, the compressor of the air conditioner is driven by an electric motor even when there is a request to operate the air conditioner while idling is stopped due to a signal waiting or the like. The auxiliary machine drive device according to this embodiment can be particularly preferably applied to such a vehicle.

  The compressor 20 and the electric motor 7 are connected via a compressor clutch 8C which is a power interrupting means for the compressor. The water pump 10 and the electric motor 7 are connected via a water pump clutch 8W which is a power interrupting means for fluid circulation means. In general, a compressor for an air conditioner is required to have a large output when there is little wind guided to the condenser, such as when the vehicle is traveling at a low speed. That is, in such a case, the load for driving the compressor increases.

  On the other hand, the water pump that circulates the cooling water of the internal combustion engine requires a large flow rate when the internal combustion engine is operated at a high load or when the vehicle is traveling at a high speed. That is, in such a case, the load for driving the compressor increases. Thus, the area | region where the load which drives these becomes large differs between a compressor and a water pump.

  If the compressor 20 and the electric motor 7 and the water pump 10 and the electric motor 7 are connected via the power interrupting means for the compressor and the fluid circulation means as in the auxiliary machine driving device according to this embodiment, the compressor 20 Or according to the area | region where the big drive load is requested | required of the water pump 10, the one where a drive load is smaller can be cut off from the electric motor 7. Thereby, the optimal air conditioning performance or cooling performance of the internal combustion engine 1 can be exhibited according to the use area of the compressor 20 or the water pump 10.

  The compressor clutch 8 </ b> C and the water pump clutch 8 </ b> W are connected to an ECU (Electronic Control Unit) 30 and are controlled by an auxiliary machine control device provided therein. Further, the electric motor 7 is connected to the ECU 30 via a driver 7D. The operation of the electric motor 7 is controlled by the ECU 30. In addition, a cooling water temperature sensor 41 and an air conditioner control panel 26 are connected to the ECU 30 in order to control operations of the compressor clutch 8C, the water pump clutch 8W, and the electric motor 7. The ECU 30 acquires the cooling water temperature from the cooling water temperature sensor 41, and acquires the operation information of the air conditioner 110 from the air conditioner switch 26s of the air conditioner control panel 26.

  FIGS. 3A and 3B are explanatory diagrams illustrating another example of the accessory driving apparatus according to this embodiment. The auxiliary machine drive device 100a according to this example includes a rotation speed changing device 9 that is a motor rotation speed changing means between the electric motor 7 and the water pump 10 (FIG. 3-1). In this embodiment, the rotation speed changing device 9 is a planetary gear device. Further, the accessory driving device 100b according to this modification includes a rotation speed changing device 9 between the electric motor 7 and the compressor 20 (FIG. 3-2). In addition, in this modification, it is not restricted to the structure of auxiliary machine drive device 100a, 100b, A rotation speed change is carried out to at least one between the electric motor 7 and the water pump 10, or between the electric motor 7 and the compressor 20. A device 9 may be provided.

  In the first embodiment, the compressor 20 and the water pump 10 are driven by the same electric motor 7. However, the compressor 20 and the water pump 10 can be driven at different rotational speeds by the configuration according to this example. . As a result, the compressor 20 and the water pump 10 can be driven at an appropriate rotational speed (for example, the rotational speed at which the highest efficiency is obtained), so that the performance of the compressor 20 and the water pump 10 can be sufficiently exhibited. it can.

  In general, the water pump is often avoided from operating at a high speed from the viewpoint of suppressing cavitation. For this reason, if the rotation speed changing device 9 is not provided, the rotation speed of the compressor 20 is limited by the maximum rotation speed of the water pump 10. However, according to this example, the rotational speed changing device 9 can set the rotational speeds of the compressor 20 and the water pump 10 to optimum rotational speeds, respectively, so that the compressor can be suppressed while suppressing cavitation in the water pump 10. The performance of 20 can be fully exhibited.

  Next, an auxiliary machine control apparatus according to this embodiment will be described. FIG. 4 is an explanatory diagram showing an auxiliary machine control device according to this embodiment. The start control of the internal combustion engine according to this embodiment can be realized by the auxiliary machine control device 30C according to this embodiment. As shown in FIG. 4, the auxiliary machine control device 30 </ b> C is configured to be incorporated in the ECU 30. The ECU 30 includes a CPU (Central Processing Unit) 30P, a storage unit 30M, input and output ports 36 and 37, and input and output interfaces 38 and 39.

  In addition, separately from ECU30, the auxiliary machine control apparatus 30C which concerns on this Example may be prepared, and this may be connected to ECU30. And in implement | achieving starting control of the internal combustion engine which concerns on this Example, you may comprise so that the said auxiliary machine control apparatus 30C can utilize the control function of the internal combustion engine 1 with which ECU30 is provided.

  The auxiliary machine control device 30 </ b> C includes a drive request determination unit 32 and a drive condition determination unit 33. These are the parts that execute the starting control of the internal combustion engine according to this embodiment. In this embodiment, the auxiliary machine control device 30C is configured as a part of a CPU (Central Processing Unit) 30P constituting the ECU 30. In addition, the CPU 30 </ b> P includes a control unit 34 that sends commands to the electric motor 7, the compressor clutch 8 </ b> C, and the like included in the accessory driving device 100 to control these operations.

The CPU 30P and the storage unit 30M are connected via an input port 36 and an output port 37 via buses 35 _{1 to} 35 ₃ . Thus, the drive request determination unit 32 and the drive condition determination unit 33 constituting the auxiliary machine control device 30C are configured to exchange control data with each other and to issue a command to one side. Further, the auxiliary machine control device 30C can acquire and use the operation control data of the internal combustion engine 1 included in the ECU 30. Further, the auxiliary machine control device 30C can interrupt the start control of the internal combustion engine according to this embodiment into an operation control routine provided in advance in the ECU 30.

  An input interface 38 is connected to the input port 36. The input interface 38 is connected with sensors for acquiring information necessary for controlling the compressor 20 and the water pump 10 as auxiliary devices, such as the cooling water temperature sensor 41 and the air conditioning switch 26s. Signals output from these sensors are converted into signals that can be used by the CPU 30P by the A / D converter 38a and the digital buffer 38d in the input interface 38 and sent to the input port 36. Thereby, CPU30P can acquire information required for operation control of internal-combustion engine 1, and auxiliary machinery control concerning this example.

An output interface 39 is connected to the output port 37. Control objects necessary for auxiliary machine control according to this embodiment, such as a compressor clutch 8C, a water pump clutch 8W, and a gear ratio variable device 9V described later, are connected to the output interface 39. The output interface 39 includes control circuits 39 ₁ , 39 _{2 and the} like, and operates the control target based on a control signal calculated by the CPU 30P. With such a configuration, based on output signals from the sensors, the CPU 30P of the ECU 30 can control the compressor 20 and the water pump 10 that are auxiliary machines.

  The storage unit 30M stores a computer program, a control map, and the like including a control procedure for the accessory driving apparatus according to this embodiment. Here, the storage unit 30M can be configured by a volatile memory such as a RAM (Random Access Memory), a nonvolatile memory such as a flash memory, or a combination thereof.

  The computer program may be capable of realizing the control procedure of the accessory driving apparatus according to this embodiment in combination with the computer program already recorded in the CPU 30P. In addition, this auxiliary machine control device 30C may realize the functions of the drive request determination unit 32 and the drive condition determination unit 33 using dedicated hardware instead of the computer program. Next, the control procedure of the accessory drive apparatus according to this embodiment will be described using the accessory control apparatus 30C. In the following description, please refer to FIGS.

  FIG. 5 is a flowchart showing a control procedure of the accessory driving apparatus according to this embodiment. In controlling the auxiliary machine drive device 100 according to this embodiment, the drive request determination unit 32 included in the auxiliary machine control device 30C acquires a signal from the air conditioning switch 26s (see FIG. 2), and acquires the auxiliary machine drive device 100. It is determined whether or not there is a drive request for the compressor 20 included in (step S101). When driving the compressor 20 (step S101: Yes), the drive condition determination unit 33 obtains the required rotation speed Np1 of the compressor 20 from the operation condition of the air conditioner 110 (step S102). When the compressor 20 is not driven (step S101: No), the drive condition determination unit 33 sets the required rotation speed Np1 of the compressor 20 to 0 (step S103).

  Next, the drive request determination part 32 acquires the output of the cooling water temperature sensor 41, and determines whether there exists a drive request | requirement of the water pump (W / P) 10 with which the auxiliary machinery drive apparatus 100 is provided (step S104). ). When there is a drive request for the water pump 10 (step S104: Yes), the drive condition determination unit 33 determines the water pump from the operation conditions of the internal combustion engine 1 such as the cooling water temperature Tw, the engine speed NE of the internal combustion engine 1, or the load. A required rotational speed Np2 of 10 is obtained (step S105). When the compressor 20 is not driven (step S104: No), the drive condition determination unit 33 sets the required rotation speed Np2 of the water pump 10 to 0 (step S106).

  Next, the drive condition determination unit 33 determines the final rotation speed Npf of the electric motor 7 (step S107). In this embodiment, Npf is the larger of the required rotation speed Np1 of the compressor 20 or the required rotation speed Np2 of the water pump 10. The controller 34 drives the electric motor 7 of the accessory driving device 100 at the determined final rotation speed Npf.

(Modification)
FIG. 6 is an explanatory diagram illustrating an accessory driving device according to a modification of the first embodiment. This modified example has substantially the same configuration as that of the first embodiment, except that a compressor clutch 8C is provided only between the compressor 20 and the electric motor 7, and the water pump 10 and the electric motor 7 are directly connected. Also in the auxiliary machine drive device 100c according to this modification, the drive sources of the compressor 20 and the water pump 10 are shared by the same electric motor 7. As a result, it is not necessary to prepare a drive source for driving the compressor 20 and a drive source for driving the water pump 10, so that it can be easily mounted even in a limited space. it can. That is, the degree of freedom when mounting the accessory driving device 100 is improved. At the same time, it is possible to reduce the mass and manufacturing cost of the auxiliary machine driving device 100 and reduce the number of driving sources, thereby reducing the maintenance and inspection work. Next, the control procedure of the accessory drive device 100c according to this modification will be described.

  FIG. 7 is a flowchart illustrating a control procedure of the accessory driving device according to the modification of the first embodiment. This control can be realized by the auxiliary machine control device 30C according to the first embodiment. In the following description, please refer to FIG. 4 as appropriate. In executing the control of the accessory drive device 100c according to the modification of the first embodiment, the drive request determination unit 32 included in the accessory control device 30C acquires a signal from the air conditioning switch 26s (see FIG. 2), It is determined whether or not there is a drive request for the compressor 20 included in the accessory drive device 100 (step S201). When driving the compressor 20 (step S201: Yes), the drive condition determination unit 33 obtains the required rotation speed Np1 of the compressor 20 from the operation condition of the air conditioner 110 (step S202). When the compressor 20 is not driven (step S201: No), the drive condition determination unit 33 sets the required rotation speed Np1 of the compressor 20 to 0 (step S203).

  Next, the drive condition determination unit 33 obtains the required rotation speed Np2 of the water pump 10 from the operation condition of the internal combustion engine 1 such as the coolant temperature Tw, the engine rotation speed NE of the internal combustion engine 1, or the load (step S204). Then, the drive condition determination unit 33 determines the final rotation speed Npf of the electric motor 7 (step S205). In this embodiment, Npf is the larger of the required rotation speed Np1 of the compressor 20 or the required rotation speed Np2 of the water pump 10. The controller 34 drives the electric motor 7 of the accessory driving device 100 at the determined final rotation speed Npf. In this modification, since the water pump 10 and the electric motor 7 are directly connected, the water pump is driven at the higher rotation speed of Np1 or Np2.

  As described above, in the first embodiment and the modifications thereof, the drive source for the compressor and the water pump is shared by the same electric motor. Accordingly, it is not necessary to separately prepare a drive source for driving the compressor and a drive source for driving the water pump, and therefore it can be easily mounted even in a limited space. And the freedom degree at the time of mounting an auxiliary machine drive device improves.

  Moreover, since the electric motor with which the accessory drive apparatus which concerns on Example 1 and its modification is driven drives the compressor of an air conditioner, it has sufficient margin for an output with respect to the drive of a water pump. For this reason, the accessory drive apparatus according to the first embodiment and the modification thereof can secure a sufficient cooling capacity in the entire operation region of the power source such as the internal combustion engine when the water pump is driven. Note that the configurations disclosed in the first embodiment and the modifications thereof can be appropriately applied to the following embodiments. Moreover, what is provided with the same structure as the structure disclosed by Example 1 and its modification has the effect | action and effect similar to the effect | action and effect which Example 1 and its modification show.

  The second embodiment has substantially the same configuration as that of the first embodiment, but allows the compressor and the water pump to be driven at different rotational speeds by the speed ratio variable means capable of changing the speed ratio of the rotational speed of the electric motor. The difference is that the rotational speeds of the compressor and the water pump can be set arbitrarily. Since other configurations are the same as those of the first embodiment, description thereof is omitted.

  FIG. 8 is an explanatory diagram of an auxiliary machine driving device according to the second embodiment. In the accessory drive device 100d according to the second embodiment, a gear ratio variable device 9V that is a gear ratio variable means is provided between the water pump clutch 8W and the water pump 10. Thus, by adjusting the rotation speed of the electric motor 7 and the transmission gear ratio of the gear ratio variable device 9V, the rotation speeds of the compressor 20 and the water pump 10 are arbitrarily set, and both are operated at the rotation speed. Can do.

  FIGS. 9-1 and FIGS. 9-2 are explanatory drawings which show the other example of the auxiliary machinery drive device which concerns on Example 2. FIGS. As shown in FIGS. 9-1 and 9-2, this auxiliary machine drive device 100e arranges the electric motor 7, the compressor 20, and the water pump 10 in parallel. Then, the output outlet of the electric motor 7 and the input ports of the compressor 20 and the water pump 10 are arranged on substantially the same straight line, and the power from the electric motor 7 is supplied to the compressor 20 and the belt 9Vb as power transmission means. Tell the water pump 10.

  An output pulley 7 p is attached to the output shaft 7 s of the electric motor 7. An input pulley 12 is attached to the input shaft 10s of the water pump 10 via a water pump clutch 8W. Further, a gear ratio variable device 9V including a gear ratio variable pulley 9Vp is attached to the input shaft 20s of the compressor 20 via a compressor clutch 8C. The output pulley 7p, the input pulley 12, and the transmission gear ratio variable pulley 9Vp are provided with a single belt 9Vb, whereby the output of the electric motor 7 is transmitted to the compressor 20 and the water pump 10.

As shown in FIG. 9A, the speed ratio variable pulley 9Vp attached to the input shaft of the compressor 20 is configured by arranging a first pulley 9Vp ₁ and a second pulley 9Vp ₂ to face each other. Then, the gear ratio variable pulleys 9Vp is by an actuator 9Va, first pulley 9Vp ₁ can move in a direction parallel to the rotation axis. Thus, changing the first pulley 9Vp ₁ and the distance h between the second pulley 9Vp _2. Belt 9Vb Since first pulley 9Vp ₁ and sandwiched between the second pulley 9Vp ₂ to transmit power, when the distance h is varied, the distance from the rotation shaft of the transmission ratio variable pulleys 9Vp to the belt 9Vb changes . Thereby, in this gear ratio variable device 9V, the gear ratio with respect to the compressor 20 can be changed.

  At this time, as shown in FIG. 9B, the tension of the belt 9Vb is adjusted by the belt tensioner 9Vbt. Thus, in the accessory drive device 100e according to this example, the speed ratio variable pulley 9Vp and the actuator 9Va constitute the speed ratio variable device 9V. Next, a control procedure for the auxiliary machine driving devices 100d and 100e according to the second embodiment will be described.

  FIG. 10 is a flowchart illustrating a control procedure of the accessory driving apparatus according to the second embodiment. This control can be realized by the auxiliary machine control device 30C (see FIG. 4) according to the first embodiment. Therefore, in the following description, please refer to FIG. 4 as appropriate. In controlling the auxiliary machine drive devices 100d and 100e according to the second embodiment, the drive request determination unit 32 included in the auxiliary machine control device 30C acquires a signal from the air conditioning switch 26s (see FIG. 8) and drives the auxiliary machine. It is determined whether or not there is a drive request for the compressor 20 included in the devices 100d and 100e (step S301). When driving the compressor 20 (step S301: Yes), the drive condition determination unit 33 obtains the required rotation speed Np1 of the compressor 20 from the operation condition of the air conditioner 110 (step S302). When the compressor 20 is not driven (step S301: No), the drive condition determination unit 33 sets the required rotation speed Np1 of the compressor 20 to 0 (step S303).

  Next, the drive request determination unit 32 acquires the output of the cooling water temperature sensor 41 and determines whether or not there is a drive request for the water pump (W / P) 10 included in the accessory drive devices 100d and 100e ( Step S304). When there is a drive request for the water pump 10 (step S304: Yes), the drive condition determination unit 33 determines the water pump from the operation conditions of the internal combustion engine 1 such as the coolant temperature Tw, the engine speed NE of the internal combustion engine 1, or the load. A required rotational speed Np2 of 10 is obtained (step S305). When the compressor 20 is not driven (step S304: No), the drive condition determination unit 33 sets the required rotation speed Np2 of the water pump 10 to 0 (step S306).

  Next, the drive condition determination unit 33 determines the final rotation speed Npf of the electric motor 7 and the gear ratio of the gear ratio variable device 9V (step S307). For example, the rotational speed of an auxiliary machine (water pump 10 or compressor 20) directly connected to the electric motor 7 is made equal to the rotational speed of the electric motor 7, and the rotational speed of the auxiliary machine connected via the gear ratio variable device 9V. Is adjusted by the gear ratio variable device 9V. In the auxiliary machine drive device 100d shown in FIG. 8, since the auxiliary machine directly connected to the electric motor 7 is the compressor 20, the final rotation speed Npf of the electric motor 7 is set to Np1, and the rotation speed of the water pump is set to Np2 by the transmission ratio variable device 9V. adjust. In the auxiliary machine drive device 100e shown in FIGS. 9-1 and 9-2, since the auxiliary machine directly connected to the electric motor 7 is the water pump 10, the final rotational speed Npf of the electric motor 7 is set to Np2, and the transmission ratio variable device 9V performs compression. The rotation speed of the machine 20 is adjusted to Np1.

  Further, a transmission ratio variable device 9V is provided between the electric motor 7 and the compressor 20 and between the electric motor 7 and the water pump 10, and the electric motor is operated at the rotational speed Npe that maximizes the conversion efficiency for converting electric power into power. Drive 7. That is, the final rotation speed Npf of the electric motor 7 is fixed to the rotation speed Npe. Then, the rotational speed of the compressor 20 may be adjusted to Np1 and the rotational speed of the water pump 10 may be adjusted to Np2 using each of the two transmission ratio variable devices 9V. The controller 34 drives the electric motor 7 of the accessory driving device 100 at the determined final rotation speed Npf.

  As mentioned above, in Example 2, the drive source of a compressor and a water pump is shared by the same electric motor. Accordingly, it is not necessary to separately prepare a drive source for driving the compressor and a drive source for driving the water pump, and therefore it can be easily mounted even in a limited space. And the freedom degree at the time of mounting an auxiliary machine drive device improves.

  Moreover, since the electric motor with which the accessory drive apparatus which concerns on Example 2 drives the compressor of an air conditioner, it has sufficient margin for an output with respect to the drive of a water pump. For this reason, the auxiliary machine drive device according to the second embodiment can secure a sufficient cooling capacity in the entire operation region of the power source such as the internal combustion engine when the water pump is driven.

  Furthermore, since the output of the electric motor is transmitted to the compressor and the water pump via the gear ratio changing means, the rotation speeds of the compressor and the water pump can be operated at the respective optimum rotation speeds. In addition, what is provided with the structure same as the structure disclosed in Example 2 has the effect | action and effect similar to the effect | action and effect which Example 2 show | plays.

  As described above, the accessory drive device according to the present invention is useful for driving a water pump by an electric motor, and is particularly suitable for being mountable even in a limited installation space.

It is explanatory drawing which shows the example which applied the auxiliary machinery drive device which concerns on this Example to the internal combustion engine. It is explanatory drawing which shows the auxiliary machine drive device which concerns on this Example. It is explanatory drawing which shows the other example of the auxiliary machinery drive device which concerns on this Example. It is explanatory drawing which shows the other example of the auxiliary machinery drive device which concerns on this Example. It is explanatory drawing which shows the auxiliary machinery control apparatus which concerns on this Example. It is a flowchart which shows the control procedure of the auxiliary machinery drive device which concerns on this Example. It is explanatory drawing which shows the auxiliary machine drive device which concerns on the modification of Example 1. FIG. 7 is a flowchart illustrating a control procedure of an auxiliary machine driving device according to a modification of the first embodiment. It is explanatory drawing which shows the auxiliary machine drive device which concerns on Example 2. FIG. It is explanatory drawing which shows the other example of the auxiliary machinery drive device which concerns on Example 2. FIG. It is explanatory drawing which shows the other example of the auxiliary machinery drive device which concerns on Example 2. FIG. 6 is a flowchart illustrating a control procedure of an auxiliary machine drive device according to a second embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Internal combustion engine 7 Electric motor 8W Water pump clutch 8C Compressor clutch 9 Speed change device 9V Gear ratio variable device 10 Water pump 26 Air conditioning device control panel 26s Air conditioning switch 30C Auxiliary machinery control device 32 Drive request determination unit 33 Drive condition determination Unit 34 Control unit 41 Cooling water temperature sensor 100, 100a, 100b, 100c, 100d, 100e Auxiliary machine drive device 110 Air conditioner

Claims (5)

A compressor that is driven by an electric motor and compresses a refrigerant for an air conditioner mounted on the vehicle;
A fluid circulation means for circulating a cooling fluid for cooling a device to be cooled that is driven by the electric motor that drives the compressor and is mounted on a vehicle;
Auxiliary machine drive device characterized by including.   2. The accessory drive according to claim 1, further comprising: a power interrupting means for a compressor for interrupting a driving force transmitted to the compressor between at least the electric motor and the compressor. 3. apparatus.   The power interrupting means for the fluid circulation means for interrupting the driving force transmitted to the fluid circulation means is further provided between the electric motor and the fluid circulation means. Auxiliary drive device.   At least one of the motor and the compressor or between the motor and the fluid circulation means is provided with motor rotation speed changing means for changing and transmitting the rotation speed of the motor. The auxiliary machine drive device according to claim 2 or 3.   At least one of the electric motor and the compressor or between the electric motor and the fluid circulation means is transmitted by changing the rotational speed of the electric motor, and the speed ratio of the rotational speed of the electric motor is changed. The auxiliary gear drive device according to any one of claims 2 to 4, further comprising a variable gear ratio changing means.

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