JP3997968B2 - Auxiliary equipment for vehicles - Google Patents

Description

  The present invention relates to a vehicular auxiliary apparatus having a motor generator for driving an engine, generating power, and a compressor, and a compressor for an air conditioner.

  In recent years, along with a demand for space saving in a vehicle engine room, it is strongly desired to reduce the size of a vehicular auxiliary device provided in the engine room. Note that the vehicular auxiliary device described in this specification refers to a device having at least an air conditioner compressor.

  In addition, so-called idle stop vehicles that stop the engine when idling are increasing. The idle stop vehicle further includes a motor for driving the air conditioner compressor during the idle stop in addition to the conventional auxiliary machines.

  For this reason, in the case of an idle stop vehicle, contrary to the demand for space saving and weight reduction, problems such as an increase in occupied space and an increase in weight due to an increase in auxiliary equipment arise.

  Japanese Patent Application Laid-Open No. 2002-205536 discloses a compact vehicle air conditioning system in which a motor generator (motor generator) and a compressor (compressor) are integrally and coaxially arranged via an electromagnetic clutch (power transmission means). It is disclosed in the publication.

This vehicle air-conditioning system disconnects power transmission between the engine and the motor generator by opening the electromagnetic clutch during idle stop. The compressor is directly driven by the driving force generated by the motor generator to operate the air conditioner. Further, when the engine is started, the electromagnetic clutch transmits the driving force generated by the motor generator to the engine, thereby starting the engine. When the engine is operating, the electromagnetic clutch transmits the driving force of the engine to the motor generator, and supplies the electric power generated by the motor generator to each part.
JP 2002-205536 A

  However, even in this vehicle air conditioning system, the electromagnetic clutch, the motor generator, and the compressor are merely provided side by side in the axial direction of the rotating shaft, so the axial length is the length of each auxiliary machine. Is very long. Therefore, in this vehicle air conditioning system, the apparatus cannot be sufficiently miniaturized, and there is a problem in practical use because it is easily subject to restrictions on vehicle mounting.

  This invention is made | formed in view of such a situation, and it aims at providing the auxiliary machine apparatus for vehicles excellent in the space-saving property.

  Therefore, the present inventor has conducted intensive research to solve this problem, and as a result of repeated trial and error, at least a part of the motor power generation means is disposed radially inward of a plurality of cylinders provided in an annular shape in the compressor. The present invention has been completed.

  In other words, the vehicular auxiliary device according to claim 1 includes a rotating shaft, power transmission means disposed on the same axis as the rotating shaft and transmitting a driving force between the engine, and the rotating shaft. Electric drive comprising at least one of electric means that is arranged on the same axis and generates a driving force when power is supplied from a power source or a power generation means that generates electric power by the driving force of the engine transmitted from the power transmission means In a vehicle auxiliary device comprising: a power generation means; and a compressor disposed on the same axis as the rotation shaft and driven by a driving force transmitted from the power transmission means or the electric means of the motor power generation means, Further, the compressor includes a plurality of cylinders extending in an axial direction and arranged in an annular shape, and a piston that reciprocates in the cylinder, and at least a part of the motor power generation means includes a front Characterized in that it is arranged in the plurality of radially inwardly of the cylinder of the compressor.

  According to a second aspect of the present invention, there is provided the vehicular auxiliary device according to the first aspect, wherein the motor power generation means has a motor function as the power means and a generator function as the power generation means. The motor generator is provided.

  According to a third aspect of the present invention, there is provided the vehicular auxiliary device according to the second aspect, wherein the power transmission means generates a driving force that generates the motor generator as a motor when the engine is started. The engine is transmitted to the engine, the driving force of the engine is transmitted to the motor generator and the compressor during operation of the engine, and power transmission between the engine and the motor generator is disconnected when the engine is stopped. And

  A vehicle auxiliary device according to a fourth aspect of the present invention is the vehicle auxiliary device according to the second to third aspects, wherein the power transmission means includes a pulley that rotates in conjunction with a main shaft of the engine; The electromagnetic clutch which is arrange | positioned inside the pulley and interrupts the said pulley and the said rotating shaft is provided.

  According to a fifth aspect of the present invention, there is provided a vehicular auxiliary device according to the first aspect, wherein the compressor further includes a piston driving means capable of reciprocating the piston and changing a stroke amount. It is a capacity type compressor.

  According to the vehicular auxiliary device of the first aspect, the power transmission means, the motor power generation means, and the compressor are arranged on the same axis. At this time, since at least a part of the motor power generation means is disposed radially inward of the plurality of cylinders extending in the axial direction and constituting the compressor, the compressor and the motor power generation means are The axial length can be shortened by the amount of overlap in the axial direction. Therefore, this vehicle auxiliary device can greatly reduce the space required for mounting on the vehicle by reducing the axial length of the compressor and the motor generator. Furthermore, since the motor generator is integrally formed inside the compressor, the number of parts such as a housing and a flange can be reduced.

  According to the vehicular auxiliary device of the second aspect, since the starter as the electric means and the alternator as the power generation means are integrated, the number of parts can be greatly reduced as compared with the case where they are provided separately. Therefore, the auxiliary device for a vehicle can further reduce the space necessary for mounting on the vehicle, and can also reduce the weight and cost.

  According to the vehicular auxiliary device of the third aspect, when the engine is started, the power transmission means transmits the driving force generated by the motor generator to the engine, so that the engine can be started. Further, during engine operation, the power transmission means transmits the driving force of the engine to the motor generator, thereby supplying the electric power generated by the motor generator to each electric load mounted on the vehicle and charging the battery. Can do. Furthermore, when the engine is stopped, the compressor can be directly driven by the driving force generated by the motor generator by cutting off the power transmission between the engine and the motor generator. Therefore, by providing such power transmission means, the motor power generation means of the present invention is capable of starting the engine, generating power when the engine is operating, and driving the compressor when the engine is stopped, that is, when idling. It becomes possible to provide all the drive functions of the air conditioner compressor. Therefore, it is not necessary to newly provide a starter, an alternator or a motor for driving an air conditioner compressor, and the space required for mounting on the vehicle can be reduced correspondingly, and the ease of assembly to the vehicle can be improved.

  According to the vehicular auxiliary device of the fourth aspect, since the electromagnetic clutch is disposed inside the pulley, the axial length of the power transmission means can be shortened. Therefore, this vehicle accessory device can further reduce the space required for mounting on the vehicle by reducing the axial length of the power transmission means.

  According to the vehicular auxiliary device of the fifth aspect, since the variable displacement compressor can continuously change the discharge amount of the refrigerant by changing the stroke amount of the piston, the driving force of the motor generator is interrupted. Thus, the clutch provided between the motor generator and the fixed displacement compressor that changes the discharge amount of the refrigerant can be reduced. Therefore, this vehicle accessory device can reduce the clutch between the compressor and the motor generator, and can further reduce the space required for mounting on the vehicle.

  The vehicle auxiliary device in this embodiment is used for an idle stop vehicle, and is a vehicle auxiliary device having an engine start function, a power generation function, and an air conditioner function by driving an air conditioner compressor. .

  FIG. 1 is a sectional view in the axial direction of the auxiliary device 1 for a vehicle in this embodiment, and FIG. 2 is an operation mode diagram.

  First, a specific structure will be described with reference to FIG. The vehicular auxiliary device 1 in this embodiment includes a rotating shaft 2, a pulley 3 (power transmission means), a swash plate type variable displacement compressor 4 (compressor), and a motor generator 5 (motor generator means). Yes. The pulley 3, the swash plate type variable displacement compressor 4 and the motor generator 5 are disposed on the same axis as the rotating shaft 2.

  The rotating shaft 2 is a cylindrical shaft having a plurality of small diameter portions and large diameter portions. The outer peripheral surface in the vicinity of one end is a front housing 41 via bearings 7 and 8 together with the lug plate 42 of the swash plate type variable displacement compressor 4 described later, and the outer peripheral surface of the other end is a bearing described later. 9, the rear housing 47 and the rear housing 47 are rotatably supported.

  The pulley 3 is made of a magnetic material, and includes an outer cylindrical wall 31, an inner cylindrical wall 32 provided concentrically inside the outer cylindrical wall 31, an inner peripheral surface of the outer cylindrical wall 31, and an outer peripheral end of the inner cylindrical wall 32. And an annular end plate 33 connecting the two. The inner peripheral surface of the inner cylindrical wall 32 is formed on the outer peripheral surface of a cylindrical boss portion 410 projecting from the outer end surface of the front housing 41 of a swash plate type variable displacement compressor 4 to be described later via a radial bearing 6. It is rotatably supported.

  The pulley 3 includes an electromagnetic clutch 34 including an electromagnetic coil 340 and a clutch plate 341 inside thereof.

  The electromagnetic coil 340 includes a solenoid coil 340a around which an electric wire is wound in an annular shape, and a yoke 340b made of a magnetic material that integrally covers the inner peripheral surface side, the outer peripheral surface side, and the one end surface side. An annular hollow portion surrounded by the outer cylindrical wall 31, the inner cylindrical wall 32 and the end plate 33 of the pulley 3 is provided between the inner peripheral surface of the outer cylindrical wall 31 and the outer peripheral surface of the yoke 340 b and the outer periphery of the inner cylindrical wall 32. Between the surface and the inner peripheral surface of the yoke 340b, each is disposed via a minute gap. The yoke 340b is fixed to the end surface of the front housing 41.

  The clutch plate 341 includes an annular suction plate 341a made of a magnetic material, a spring plate 341b that is arranged concentrically with the suction plate 341a, and is fixed to the suction plate 341a at a plurality of locations near the outer periphery, and a spring plate 341b. And a cylindrical base portion 341c fitted to the shaft end portion of the rotary shaft 2. The suction plate 341a is disposed concentrically with the pulley 3 on the side facing the electromagnetic coil 340 across the end plate 33 of the pulley 3 via the end plate 33 and a minute gap.

  The control device (not shown) generates an electromagnetic force by passing a current through the electromagnetic coil 340, and the suction plate 341a moves toward the end plate 33 of the pulley 3 against the spring plate 341b. It is adsorbed by 33. As a result, the clutch plate 341 and the pulley 3 are connected, and power can be transmitted between the rotating shaft 2 and the pulley 3. Here, when the current flowing through the electromagnetic coil 340 is interrupted, the electromagnetic force is lost, and the adsorption plate 341a of the clutch plate 341 adsorbed to the end plate 33 of the pulley 3 is separated from the end plate 33 by the urging force of the spring plate 341b. To do. As a result, the clutch plate 341 and the pulley 3 are released, and the transmission of power between the rotary shaft 2 and the pulley 3 is cut off.

  The swash plate type variable displacement compressor 4 includes a front housing 41, a lug plate 42, a swash plate 43, a hinge portion 44, a cylinder block 45, a piston 46, and a rear housing 47.

  The front housing 41 includes a cylindrical boss portion 410 and an end plate 411 extending radially outward from the outer peripheral end portion of the boss portion 410.

  The lug plate 42 includes a cylindrical wall 420 and an end plate 421 that extends radially outward from the outer peripheral end of the cylindrical wall 420. The inner peripheral surface of the cylindrical wall 420 is fixed to the outer peripheral surface of the rotating shaft 2. The outer peripheral surface of the cylindrical wall 420 is connected to the inner peripheral surface of the boss portion 410 of the front housing 41 via the radial bearing 7, and the end surface of the end plate 421 on the cylindrical wall 420 side is connected to the front housing via the thrust bearing 8. 41 are rotatably supported on the end face on the side facing the boss part 410.

  The swash plate 43 is an annular structure, and a guide hole 430 is provided through the center of the swash plate 43, and shoes 431 for anchoring a piston 46, which will be described later, are disposed on both surfaces of the outer peripheral edge. The guide hole 430 is disposed through the rotary shaft 2.

  The hinge portion 44 is fixed to the end face of the end plate 421 of the lug plate 42 on the side facing the cylindrical wall 420, rotates the swash plate 43 synchronously with the rotary shaft 2, and can tilt with respect to the rotary shaft 2 and is axially oriented And slidably supported.

  The cylinder block 45 includes a cylindrical center housing 450 and a plurality of cylinders 451 arranged in an annular shape extending in the axial direction along the inner peripheral surface inside the center housing 450. A recess 452 is formed on the inner side in the radial direction of the cylinder 451 on the end surface facing the end surface where the cylinder 451 opens. A through hole 453 through which the rotary shaft 2 is inserted is formed at the center of the cylinder block 45.

  The piston 46 is a cylindrical structure, one end side is moored via a shoe 431 of the swash plate 43, and the other end side is accommodated in the cylinder 451 so as to be able to reciprocate.

  The rear housing 47 includes an outer cylindrical wall 470, a bottom plate 471 that covers one end of the outer cylindrical wall 470, and an inner cylindrical wall 472 that projects from the center of the end surface of the bottom plate 471 on the outer cylindrical wall 470 side. The inner peripheral surface of the inner cylindrical wall 472 supports the outer peripheral surface of the end portion of the rotary shaft 2 via the radial bearing 9 so as to be rotatable.

  As the rotary shaft 2 rotates, the swash plate 43 rotates via the lug plate 42 and the hinge portion 44. Each piston 46 reciprocates in the cylinder 451 through a shoe 431 disposed on the outer peripheral edge of the swash plate 43, and sucks, compresses and discharges the refrigerant. Furthermore, the inclination angle of the swash plate 43 can be adjusted by adjusting the pressure in the swash plate chamber 432 in which the swash plate 43 is accommodated by a pressure control valve (not shown). As a result, the stroke amount of the piston 46 changes. In addition, the discharge amount of the compressed refrigerant can be varied.

  The motor generator 5 includes a rotor 51 and a stator 52.

  The rotor 51 is configured by laminating silicon steel plates, which are magnetic materials, and a through hole 510 through which the rotary shaft 2 is inserted is disposed at the center of the end surface, and around the through hole 510, A through hole 511 into which the magnet 512 is inserted is formed. Then, in a state where the magnet 512 is inserted into the through hole 511, both end surfaces of the rotor 51 are covered with an annular end plate 513. The end plate 513 is fixed to the end surface of the rotor 51 by pins 514. The rotor 51 is fixed to the rotating shaft 2 in a state where the rotating shaft 2 is inserted into the through hole 510.

  The stator 52 is configured by laminating silicon steel plates, which are magnetic materials, around which a winding 520 is wound, and a through-hole 521 in which a rotor 51 fixed to the rotary shaft 2 is disposed at the center. Is formed. The outer peripheral surface of the stator 52 is fixed to the inner peripheral surface of a recess 452 provided in the cylinder block 45 of the swash plate type variable displacement compressor 4.

  The rotor 51 of the motor generator 5 and a part of the stator 52 are integrally disposed inside a recess 452 provided in the cylinder block 45 of the swash plate type variable displacement compressor 4.

  The control device converts the DC power extracted from the battery into AC power and supplies it to the motor generator 5, whereby a current flows through the winding 520 of the motor generator 5, and this current is a magnetic flux from the magnet 512. Torque is generated by interlinking with. That is, the motor generator 5 functions as an electric motor and generates driving force. Further, the pulley 3 having the electromagnetic clutch 34 transmits the driving force of the engine to the rotating shaft 2 of the motor generator 5, whereby the rotor 51 of the motor generator 5 rotates. The magnetic flux from the magnet 512 fixed to the rotor 51 is linked to the winding 520 at a certain speed, so that an AC induced voltage is generated. That is, the motor generator 5 functions as an AC generator. This AC power is converted into DC by the control device, supplied to each electric load, and the battery is charged.

  Next, a specific operation will be described with reference to FIG. There are three types of operation modes: a start mode, a power generation / air conditioner mode, and an electric air conditioner mode. The start mode is a mode for bringing the engine from the stopped state to the operating state. The power generation / air conditioner mode is a mode in which the engine is in an operating state, generates electric power, and drives the air conditioner by the swash plate type variable displacement compressor 4. The electric air conditioner mode is a mode in which the engine is stopped and the air conditioner is driven by the swash plate type variable displacement compressor 4.

  First, the start mode will be described. In this case, the electromagnetic clutch 34 is turned on by the control device, power can be transmitted between the rotating shaft 2 and the pulley 3, and the motor generator 5 is driven. As a result, the driving force of the motor generator 5 is transmitted from the rotating shaft 2 through the pulley 3 to the pulley 3 provided on the crankshaft (main shaft) of the engine via the belt, and the engine is started.

  Next, the power generation / air conditioning mode will be described. In this case, the electromagnetic clutch 34 is turned on by the control device, and power can be transmitted between the rotating shaft 2 and the pulley 3. As a result, the driving force of the engine in the operating state is transmitted from the pulley provided on the crankshaft to the rotating shaft 2 through the pulley 3 of the vehicle auxiliary device 1 via the belt, and the motor generator 5 and the swash plate type The variable displacement compressor 4 is driven. Thereby, the motor generator 5 generates alternating current power, and this alternating current power is converted into direct current by the control device, supplied to each electric load, and charged to the battery. The swash plate type variable displacement compressor 4 varies the inclination angle of the swash plate 43 to discharge an optimal amount of compressed refrigerant.

  Finally, the electric air conditioner mode will be described. In this case, the electromagnetic clutch 34 is turned off by the control device, and the transmission of power between the rotary shaft 2 and the pulley 3 is cut off. As a result, transmission of power between the crankshaft of the engine and the rotating shaft 2 is also cut off. When the air conditioner is driven in this state, the motor generator 5 is driven by the control device, so that the swash plate type variable displacement compressor 4 is driven and the inclination angle of the swash plate 43 is varied to optimize the compressed refrigerant. Dispense volume.

  As described above, since a part of the motor generator 5 is integrally disposed on the radially inner side of the cylinder 451 of the swash plate type variable displacement compressor 4, the pulley, the compressor, and the motor generator are provided side by side in the axial direction. Compared with a conventional vehicular auxiliary device, the axial length can be greatly reduced. As a result, it is possible to provide a vehicular auxiliary device that is excellent in space saving and meets the demand for downsizing the vehicle engine room. Furthermore, since the outer diameter of the rotor 51 of the motor generator 5 is also reduced, the inertia is reduced and the responsiveness in the electric air conditioner mode can be improved.

  In the above-described embodiment, the motor generator 5 is a motor generator 5 including a motor that is an electric device that generates a driving force when power is supplied from a power source, and a generator that is a generator that generates an electric power by the driving force of the engine. There is, but is not limited to this. For example, a starter or an alternator alone may be used. If at least a part of the starter or alternator is disposed radially inward of the plurality of cylinders of the compressor, the axial length of the vehicular auxiliary device can be reduced as in this case.

An axial direction sectional view in a present Example is shown. The operation mode figure in a present Example is shown.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Vehicle auxiliary equipment 2 ... Rotary shaft 3 ... Pulley 34 ... Electromagnetic clutch 4 ... Swash plate type variable displacement compressor 42 ... Lug plate 43 ... Swash plate 44 ··· Hinge 45 · · · Cylinder block 451 · · · Cylinder 452 · · · Recess 46 · · · Piston 5 · · ·

Claims (5)

A rotating shaft, a power transmission means disposed on the same axis as the rotating shaft and transmitting a driving force between the engine, and an electric power supplied from a power source disposed on the same axis as the rotating shaft. An electric power generation means comprising at least one of an electric power generation means for generating a driving force or a power generation means for generating electric power by the driving force of the engine transmitted from the power transmission means, and a rotation shaft arranged on the same axis. And a vehicular auxiliary device comprising a compressor driven by a driving force transmitted from the power transmission means or the electric power means of the motor power generation means,
Further, the compressor includes a plurality of cylinders extending in the axial direction and arranged in an annular shape, and a piston that reciprocates in the cylinder, and at least a part of the motor power generation means includes a plurality of cylinders of the compressor. An auxiliary device for a vehicle, wherein the auxiliary device is disposed on a radially inner side of the cylinder.   2. The vehicular auxiliary device according to claim 1, wherein the motor power generator is a motor generator having a motor function as the motor and a generator function as the power generator.   The power transmission means transmits a driving force generated by using the motor generator as a motor when the engine is started to the engine, and transmits a driving force of the engine to the motor generator and the compressor when the engine is operated. 3. The vehicle auxiliary device according to claim 2, wherein power transmission between the engine and the motor generator is cut off when the engine is stopped.   The power transmission means includes a pulley that rotates in conjunction with a main shaft of the engine, and an electromagnetic clutch that is disposed inside the pulley and intermittently connects the pulley and the rotating shaft. Item 4. The vehicle auxiliary device according to any one of Items 2 to 3.   2. The vehicular auxiliary device according to claim 1, wherein the compressor is a variable displacement compressor provided with piston driving means capable of changing the stroke amount while reciprocating the piston.

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