JP2005082126A - Auxiliary machine driving device for automobile - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an auxiliary machine driving device for an automobile for driving an auxiliary machine by using an internal combustion engine or MG as a driving source and restricted in axial length thereof. <P>SOLUTION: The internal combustion engine 10 or the motor generator 20 to be stopped during idle operation drives the auxiliary machine 30 concentrically arranged with the motor generator. The auxiliary machine comprises a torque distributing mechanism for distributing the driving force of the internal combustion engine to the motor generator and the auxiliary machine and while transmitting the driving force of the motor generator to the auxiliary machine, a clutch mechanism 60 for connecting or disconnecting a route of a part of the torque distributing mechanism 60, and a lock mechanism 65 for restricting or releasing the route between the torque distributing mechanism and the auxiliary machine. When idle operation is stopped, the auxiliary machine 30 is driven by the motor generator 20. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an accessory driving apparatus for an automobile in which an accessory such as an air conditioner compressor is driven by an internal combustion engine or a generator motor in a hybrid vehicle or the like.

  In recent years, hybrid vehicles and the like having an idle stop function for stopping an engine when idling such as waiting for a signal have been developed. In such a hybrid vehicle, there is a problem of how to secure a drive source for an auxiliary machine such as an air conditioner compressor at the time of idling stop.

  The applicant of the present application has filed an application for an auxiliary drive device for an automobile (see Patent Document 1). Details will be described with reference to FIG. The auxiliary machine drive device 250 drives the compressor 210 as an auxiliary machine with the engine 200 or the MG 205, and the switching is performed by the planetary gear mechanism 220, the clutch mechanism 230, and the lock mechanism 235.

  The rotation shaft 222 of the sun gear 221 of the planetary gear mechanism 220 is disposed on the same line as the rotation shaft 211 of the compressor 210 and the rotation shaft 206 of the MG 205. A clutch mechanism 230 is disposed between the rotation shafts 222 and 206, and a lock mechanism 235 is disposed between the rotation shafts 222 and 211, respectively. A carrier 223b attached to the planetary gear 223a is coupled to the rotation shaft of the pulley 240, and the pulley 240 is connected to the pulley 245 of the engine 200 via the belt 242. Ring gear 224 is coupled to rotating shaft 206 of MG 205.

  In this auxiliary machine drive device 250, when the engine is started after idling stop, the clutch mechanism 230 is disconnected and the lock mechanism 235 is locked. Then, the rotation of the sun gear 221 is prohibited, and the MG 205 is coupled to the pulley 240 via the carrier 223b and the ring gear 224. Even after the engine 200 is started, the clutch mechanism 230 is in the disconnected state, the lock mechanism 235 is in the restrained state, and the MG 205 is rotated by the engine 200 and exhibits a power generation (charging) function. At this time, the compressor 210 is stopped.

  In order to operate the compressor 210 when the engine is driven, the clutch mechanism 230 is in a connected state and the lock mechanism 235 is in an open state. Then, the sun gear 221 and the ring gear 224 are coupled, and the compressor 210 is operated by the engine 200.

In order to operate the air conditioner during idle stop, the clutch mechanism 230 is disconnected and the lock mechanism 235 is opened. The carrier 223b of the planetary gear mechanism 220 cannot rotate due to the friction of the engine 200, and the compressor 210 is operated by the MG 205 via the ring gear 224, the planetary gear 223a, and the sun gear 221.
JP 2002-309983 A

  However, the compressor 210 and the MG 205 are arranged in the axial direction, and the planetary gear mechanism 220 is disposed therebetween. As a result, the axial lengths of the MG 205, the compressor 210, and the planetary gear mechanism 220 are added, and the axial length of the compressor driving device 250 is increased. If the axial lengths of the MG 205 and the compressor 210 are shortened in order to suppress the axial length of the compressor driving device 250, the predetermined power generation capacity and refrigerant discharge capacity may be reduced.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an accessory driving device in which an accessory is driven using an internal combustion engine or MG as a drive source and the axial length is suppressed.

  The inventor of the present application has conceived that the generator motor and the auxiliary machine are arranged concentrically, and then the coupling relationship between the planetary gear mechanism as the torque distribution mechanism and the internal combustion engine, the generator motor and the auxiliary machine is changed. The present invention has been completed.

  According to a first aspect of the present invention, there is provided an auxiliary drive apparatus for driving an auxiliary machine by an internal combustion engine or a generator motor that is stopped when idling. The sun gear, the carrier and the ring gear are respectively connected to the generator motor, the internal combustion engine or the auxiliary machine, and distribute the driving force of the internal combustion engine to the generator motor and the auxiliary machine. A planetary gear mechanism for transmitting the power to the accessory; a clutch mechanism for connecting or blocking a path between any two of the carrier, ring gear and ring gear of the planetary gear mechanism; a lock mechanism for restricting or releasing the operation of the accessory; Consists of.

  In this auxiliary machine drive device, the generator motor and the auxiliary machine are arranged concentrically, that is, radially inside and outside. The planetary gear mechanism distributes the driving force of the internal combustion engine or the generator motor to the auxiliary machinery and transmits the driving force of the generator motor to the internal combustion engine. At that time, the clutch mechanism connects necessary paths and blocks unnecessary paths, and the lock mechanism restrains or releases the operation of the auxiliary machine.

  According to a second aspect of the present invention, there is provided the auxiliary device driving apparatus according to the first aspect, wherein the planetary gear mechanism operates the auxiliary device with the generator motor at the time of idling stop, and starts the internal combustion engine with the generator motor at the time of starting the internal combustion engine. When traveling, the generator motor and the auxiliary machine are operated by the internal combustion engine.

  According to a third aspect of the present invention, there is provided the auxiliary device driving apparatus according to the second aspect, wherein the sun gear is connected to the auxiliary device, the carrier is connected to the internal combustion engine, the ring gear is connected to the generator motor, and the clutch mechanism is the sun gear rotation shaft, carrier rotation shaft and ring gear. The power path between any two of the rotating shafts is connected or cut off. According to a fourth aspect of the present invention, the sun gear is connected to the generator motor, the carrier is connected to the internal combustion engine, the ring gear is connected to the auxiliary machine, and the clutch mechanism includes the sun gear rotation shaft, the carrier rotation shaft, and the ring gear. The power path between any two of the rotating shafts is connected or cut off.

  According to a fifth aspect of the present invention, there is provided an auxiliary machine driving device according to the second aspect, wherein the sun gear is connected to the generator motor, the carrier is connected to the auxiliary machine, the ring gear is connected to the generator motor, and the clutch mechanism includes a sun gear rotation shaft, a carrier rotation shaft, The power path between any two of the rotating shafts of the ring gear is connected or cut off. According to a sixth aspect of the present invention, there is provided an auxiliary machine drive device according to the third, fourth, or fifth aspect, wherein the auxiliary machine is a swash plate compressor for an air conditioner, and a cylinder and a piston thereof are arranged radially on the outer peripheral side of the generator motor.

  According to the automotive accessory driving apparatus according to the present invention, since the generator motor and the auxiliary machine are arranged in the radial direction in an internal / external relationship, the axial length of the auxiliary driving apparatus is longer than when both are arranged in the axial direction. Becomes shorter. The planetary gear mechanism distributes the driving force of the internal combustion engine and transmits the driving force of the generator motor.

  According to the auxiliary device driving apparatus of the second aspect, the driving of the auxiliary device is ensured by the generator motor even at the idle stop when the internal combustion engine stops. According to the auxiliary drive apparatus of claims 3, 4 and 5, the auxiliary motor is driven by the generator motor regardless of whether the generator motor is connected to the sun gear or the ring gear and the auxiliary machine is connected to the sun gear, the carrier or the ring gear. Is done. According to the auxiliary device driving apparatus of the sixth aspect, the swash plate compressor for an air conditioner and the generator motor can be arranged with high space efficiency. Further, the rotor of the generator motor on the radially inner side can be reduced in size.

<Automobile>
The “automobile” of the present invention is a hybrid vehicle that travels with the driving force of an internal combustion engine (engine) or a generator motor (MG). The “auxiliary machine” includes an air conditioner compressor, a power steering oil pump, a cooling water pump, and the like, and is operated by an engine or MG. There are two types of power sources in automobiles, but the power source for traveling and the operating source for operating auxiliary equipment are the same. Therefore, for example, when the automobile is running with the driving force of the engine, the engine driving force is also used to operate the auxiliary machine.
<Auxiliary machine drive>
The accessory drive device of the present invention includes a planetary gear mechanism, a clutch mechanism, and a lock mechanism as a torque distribution mechanism.
(1) Planetary gear mechanism (torque distribution mechanism)
The planetary gear mechanism distributes the driving force (torque) of the engine to the MG and the auxiliary device, and transmits the driving force (torque) of the MG to the auxiliary device. The engine torque is distributed to the MG when the automobile is running with the driving force of the engine, and is distributed to the auxiliary equipment when the battery needs to be charged even when the automobile is stopped. On the other hand, the torque of MG may be transmitted to the auxiliary machine when the auxiliary machine needs to be driven while the engine is stopped, or may be used as the driving force of the automobile.

There are three types of planetary gear mechanisms. In the first type, as shown in FIG. 4A, the sun gear is connected to the compressor, the carrier is connected to the engine, and the ring gear is connected to the MG. In the second type, as shown in FIG. 4B, the sun gear is connected to MG, the carrier is connected to the engine, and the ring gear is connected to the compressor or the like. In the third type, as shown in FIG. 4C, the sun gear is connected to MG, the carrier is connected to a compressor, etc., and the ring gear is connected to the engine.
(2) Clutch mechanism The clutch mechanism is a sun gear or carrier in any of the first type shown in FIG. 4 (a), the second type shown in FIG. 4 (b), and the third type shown in FIG. 4 (c). And it arrange | positions between two axes | shafts among the rotating shafts of a ring gear. In either case, the engine is shut off when the engine is started, and is connected when power generation and compressor driving are performed simultaneously after the engine is started.
(3) Lock mechanism The lock mechanism restricts or releases the operation of the auxiliary machine in any of the first type in FIG. 4A, the second type in FIG. 4B, and the third type in FIG. 4C. To do. The lock mechanism is restrained (locked) when the operation of the compressor or the like is unnecessary or inappropriate, and the lock mechanism is opened (unlocked) when the operation is necessary.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
(Constitution)
The hybrid vehicle shown in FIGS. 1, 2, and 3 includes a gasoline engine (hereinafter referred to as “engine”) 10, a motor generator (hereinafter referred to as “MG”) 20, an air conditioner compressor 30, and an accessory drive mechanism 45. including. Among these, the MG 20 excluding the engine 10, the compressor 30, and the accessory driving device 45 are accommodated in the housing 15. Hereinafter, each component will be described individually.

  A belt 13 is stretched between a pulley 12 and a pulley 14 fixed to the output shaft 11 of the engine 10. The pulley 14 is attached to an auxiliary machine driving device 45 described later.

  The MG 20 includes a fixed cylindrical stator 21 and a columnar rotor 22 that rotates in its hollow portion. The stator 21 is fixed in a space near the other end wall (right end wall in FIG. 1) 16b of the housing 15, and the rotor 22 is a rotation shaft that is rotatably supported by the one end wall 17a and the other end wall 17b of the housing 15. 23 is attached.

  The MG 20 is driven by the AC voltage obtained by converting the DC voltage of the DC power supply 25 by the inverter 26, and the rotor 22 generates torque. The inverter 26 is controlled by a control circuit 28. The DC power supply 25 also activates the electrical load 27.

  The compressor 30 includes a swash plate 32 that rotates around the rotation shaft 23, a cylinder 33, and a plurality of pistons 34 that are disposed in the cylinder 33 and reciprocated by the swash plate 32.

  As apparent from FIG. 1, the swash plate 32 is disposed in the axially intermediate portion of the housing 15, and the cylinder 33 and the piston 34 are concentric with the MG 20, that is, on the outer peripheral side thereof. It is arranged using the space between. When the swash plate 32 is rotated by the engine 10 or the MG 20, the piston 34 is moved in the axial direction in the cylinder 33, and the refrigerant is compressed and discharged.

  Next, an apparatus for driving the compressor 30 will be described. The accessory drive device 45 includes a planetary gear mechanism (torque distribution mechanism) 50, a clutch mechanism 60, a lock mechanism 65, and the like, and corresponds to the third type.

  As can be seen from FIGS. 1 and 3, the planetary gear mechanism 50 transmits only the revolving motion of the sun gear 51 attached to the rotating shaft 23, the plurality of planetary gears 54a that revolve around it and the planetary gear 54a. Carrier 54b that rotates, and a ring gear 57 that rotates on the outside thereof. On one side of the planetary gear mechanism 50 (on the left side in FIG. 1), a ring gear 57 is coupled to the pulley 14 via a rotating shaft 53. On the other side, the carrier 54 b is coupled to the swash plate 32 of the compressor 30 via a rotating arm 58 that can rotate about the rotating shaft 23.

A clutch mechanism 60 is disposed between the sun gear 51 and the ring gear 57. The clutch mechanism includes a pair of friction plates 61 and 62 and an electromagnetic coil 64 that are disposed on the shaft of the sun gear 51 and the shaft of the ring gear 57 so as to face each other. In the connected state, the sun gear 51 and the ring gear 57 are coupled, and in the disconnected state, both are disconnected. Further, a lock mechanism 65 is disposed between the housing 15 and the carrier 54b, that is, the swash plate 32, and restrains or releases the transmission of the driving force from the planetary gear mechanism to the 50 compressor 30.
(Function)
The operation of this embodiment will be described below.
(1) During idle stop When the hybrid vehicle stops due to a signal or the like, the engine 10 stops due to idle stop. When it is necessary to operate the air conditioner during idling stop, the compressor 30 is driven by the MG 20. The revolution of the planetary gear 54 a, that is, the rotation of the carrier 54 b is transmitted to the swash plate 32 by opening the lock mechanism 65. Due to the disconnection of the clutch mechanism 60, the rotation of the rotor 22 of the MG 20 is not transmitted to the engine 10. Therefore, the control circuit 28 drives the inverter 26 and AC power is supplied, and the MG 20 generates torque necessary for the rotation of the compressor 30.
(2) Start (starter) mode When the engine 10 is started from the idling stop state, the starter mode is set. When the clutch mechanism 60 is disconnected, the sun gear 51 and the ring gear 57 are disconnected. The rotational force (torque) of the rotor 22 of the MG 20 is transmitted to the ring gear 51 connected to the pulley 14 via the sun gear 51 and the planetary gear 54a. The control circuit 28 controls the inverter 26 and supplies AC power to the MG 20, and the rotor 22 of the MG 20 generates torque necessary for starting the engine 10. Thus, the engine 10 is started by the MG 20.

Simultaneously with the disconnection of the clutch mechanism 60, the lock mechanism 65 is restrained. As a result, the rotation of the carrier 54b is prohibited, and the compressor 30 does not operate.
(3) Air-conditioner operation when driving the engine When the engine 10 is driven, the clutch mechanism 60 is connected to operate the air-conditioner. Then, the sun gear 51, the carrier 54 b and the ring gear 57 of the planetary gear mechanism 50 are integrated and rotated by the engine 10 via the pulley 14. The MG 20 is rotated by the engine 10 via the planetary gear mechanism 50 that rotates integrally, and functions as a generator.

Prior to the coupling of the clutch mechanism 60, the lock mechanism 65 is opened. Then, the compressor 30 is operated by the engine 10 via the planetary gear mechanism 50.
(effect)
According to this embodiment, the following effects can be obtained. First, the axial length of the accessory drive mechanism can be shortened. As can be seen from FIG. 1, the MG 20, the compressor 30, and the planetary gear mechanism 50 have only the minimum necessary axial length. This was achieved by arranging the cylinder 33 and the piston 34 of the compressor 30 concentrically with the MG 20 and on the outer peripheral side of the stator 21.

  The space on the outer peripheral side of the stator 21 in which the cylinder 33 and the piston 34 are arranged was originally wasted. Since the dead space is effectively used, the increase in the radial dimension of the compressor 30 and the housing 15 is insignificant.

  Second, by providing the MG 20 on the radially inner side of the compressor 30, the rotor 22 of the MG 20 is reduced in diameter. As a result, the inertia of the rotor 22 itself, which hinders the acceleration of the rotor 22 when starting the engine, can be reduced, and the time required for starting can be shortened.

  Third, the sun gear 51 of the planetary gear mechanism 50 is connected to the MG 20, the ring gear 57 is connected to the engine 10, and the carrier 54 b is connected to the compressor 50, whereby the MG 20 can be downsized. That is, in addition to the conventional pulley ratio (diameter of the pulley on the engine side / diameter of the pulley 14), only (1−ρ) / ρ can be added to the speed reduction ratio when the engine is driven by the MG 20 (ρ = sun gear 51 This is because the number of teeth / the number of teeth of the ring gear 57) increases the amplification factor of the transmission torque.

  Fourth, by providing the clutch mechanism 60 between the carrier 54b and the ring gear 57, the joint torque (that is, the torque capacity of the clutch) necessary for integrating the planetary gear mechanism 50 after engine startup can be minimized. .

  The configuration of the above embodiment is described as an example that remarkably represents the effect of the present invention. However, the combination of devices (auxiliaries such as the engine 10, the MG 20, and the compressor 30) to which the rotary shafts of the planetary gear mechanism 50 are connected is not limited to the above embodiment.

  Further, the clutch only needs to connect or disconnect the power path between any two of the three gear rotation shafts of the planetary gear mechanism 50, and is not limited to the embodiment described above. Furthermore, although the auxiliary machine is an air conditioner compressor in the above embodiment, the present invention can be applied to various other auxiliary machines without impairing the gist of the present invention.

It is a longitudinal cross-sectional view which shows the Example of this invention. It is a cross-sectional view similarly. It is a schematic explanatory drawing of the said Example. (A) is explanatory drawing of the 1st type of this invention, (b) is explanatory drawing of the 2nd type of this invention, (c) is explanatory drawing of the 3rd type of this invention. It is a schematic explanatory drawing of a prior art example.

Explanation of symbols

10: Engine 15: Housing 20: MG 21: Rotor 22: Stator 30: Compressor 32: Swash plate 33: Cylinder 34: Piston 50: Planetary gear mechanism 51: Sun gear 54: Planetary gear 57: Ring gear 60: Clutch mechanism 65: Lock mechanism

Claims (6)

An auxiliary machine driving device for driving an auxiliary machine by an internal combustion engine or a generator motor that stops when idling,
The generator motor and the auxiliary machine are arranged concentrically,
The sun gear, the carrier, and the ring gear are respectively connected to the generator motor, the internal combustion engine, or the auxiliary machine, and distribute the driving force of the internal combustion engine to the generator motor and the auxiliary machine, and drive the generator motor. A planetary gear mechanism for transmitting force to the auxiliary machine;
A clutch mechanism for connecting or blocking a path between any two of the carrier, ring gear and ring gear of the planetary gear mechanism;
An automobile accessory drive device comprising: a lock mechanism for restricting or releasing the operation of the accessory.   The planetary gear mechanism operates the auxiliary machine with the generator motor during idle stop, starts the internal combustion engine with the generator motor when starting the internal combustion engine, and operates the generator motor and auxiliary machine when running the internal combustion engine. The accessory driving apparatus according to claim 1, wherein the accessory driving apparatus is operated by the internal combustion engine.   The sun gear is connected to the auxiliary machine, the carrier is connected to the internal combustion engine, the ring gear is connected to the generator motor, and the clutch mechanism includes a rotation shaft of the sun gear, a rotation shaft of the carrier, and a rotation shaft of the ring gear. The accessory drive device according to claim 2, wherein the power path between any of the two shafts is connected or cut off.   The sun gear is connected to the generator motor, the carrier is connected to the internal combustion engine, the ring gear is connected to the auxiliary machine, and the clutch mechanism includes a rotation shaft of the sun gear, a rotation shaft of the carrier, and a rotation shaft of the ring gear. The accessory drive device according to claim 2, wherein the power path between any of the two shafts is connected or cut off.   The sun gear is connected to the generator motor, the carrier is connected to the auxiliary machine, and the ring gear is connected to the generator motor. The clutch mechanism includes a rotation shaft of the sun gear, a rotation shaft of the carrier, and a rotation shaft of the ring gear. The accessory drive apparatus of Claim 2 which connects or interrupts | blocks the power path between any two of these.   6. The auxiliary machine driving device according to claim 3, wherein the auxiliary machine is a swash plate compressor for an air conditioner, and a cylinder and a piston thereof are arranged on an outer peripheral side of the generator motor in a radial direction.

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