JP3855948B2 - Actuator system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an actuator system, and is effective when applied to an electric actuator system that drives movable members such as various plate doors of a vehicle air conditioner.
[0002]
[Background Art and Problems to be Solved by the Invention]
Conventionally, in order to rotate plate doors such as an air mix door (A / M door) for adjusting the air temperature and an air outlet door for switching the air outlet in an air conditioning unit of a vehicle air conditioner, A servo motor having a communication control unit for communicating with a control device has been proposed.
[0003]
For example, in the air conditioning unit, when a plurality of servo motors are provided to drive a plurality of doors, for example, as shown in FIG. 14, each of the servo motors 5 to 8 and the electronic control unit (ECU) ) 1 is connected to the bus type by the bus line 9. Then, the electronic control unit 1 outputs the target position for each servo motor through the communication line 3 of the bus line 9, and when each of the servo motors 5 to 8 receives the target position, it rotates the door to the received target position. .
[0004]
However, for example, when a disconnection occurs at a certain location A in the power supply line 2 of the bus line 9, the servo motor 5 connected to the electronic control device side from this location A communicates with the electronic control device 1. However, since the servomotors 6 to 8 connected to the position A on the opposite side of the electronic control device 1 are not supplied with power from the electronic control device 1, it is impossible to control the rotation of the door. Occurs.
[0005]
In view of the above, an object of the present invention is to provide an actuator system that increases the possibility of driving an electric actuator having an important function when a wire is disconnected.
[0006]
[Means for Solving the Problems]
  In order to achieve the above object, according to the first aspect of the present invention, the electric actuators (100a to 100f) and the electric actuators are provided according to the electric actuators (100a to 100f) according to the control signals input to the electric actuators. Each communication control unit (200a to 200f) for controlling each electric actuator and at least one electric wire (300) to which each communication control unit is commonly connected are connected, and control signals for each electric actuator are controlled by each communication. An electronic control unit (400) for outputting to each of the units,Each communication control unit is set with a priority corresponding to the function of each electric actuator, and each communication control unit is closer to the electronic control device as the priority is higher for the electric wire. It is connectedAn actuator system, which is applied to an air conditioner for a vehicle. Among a plurality of electric actuators, an inside / outside air switching for switching between air and outside air in a vehicle compartment is introduced. Electric actuator (100e) and an electric actuator (100f) for a blower for blowing air, the priority of the electric actuator for switching between the inside and outside air is higher than the priority of the electric actuator for the blower When the electronic control unit determines that the electric actuator for the blower is uncontrollable, the electronic control device outputs a control signal for introducing outside air into the electric actuator for switching between the inside and outside airIt is characterized by that.
[0007]
  Thereby, the communication control unit with a higher priority is connected closer to the electronic control device than the communication control unit with a lower priority. Therefore, it is possible to reduce the probability of disconnection between the communication control unit having a high priority and the electronic control device, and to increase the possibility of driving the electric actuator having an important function.In addition, when the electric actuator for the blower is uncontrollable, the air conditioning in the passenger compartment is not performed and the windshield in the passenger compartment may become cloudy, but the electric actuator for switching the inside / outside air is controlled to introduce outside air Thereby, it can suppress that a windshield becomes cloudy.
[0009]
  According to a second aspect of the present invention, in the actuator system according to the first aspect, among the plurality of electric actuators, an electric actuator for switching an air outlet (100a) for switching an air outlet that blows air into the passenger compartment. ˜100c), the electric actuator for switching the inside / outside air, the electric actuator for switching the outlet, and the electric actuator for the blower are set in order of decreasing the priority of the function for each electric actuator. It is characterized by being. According to a third aspect of the present invention, in the actuator system according to the second aspect, among the plurality of electric actuators, a temperature adjusting electric actuator (100d) for adjusting an air temperature blown out into the vehicle interior is further included. ), And the priority of the function for each electric actuator becomes lower in the order of the electric actuator for switching the inside / outside air, the electric actuator for switching the outlet, the electric actuator for the blower, and the electric actuator for adjusting the temperature. It is set as follows.
[0010]
Incidentally, the reference numerals in parentheses of each means described above are an example showing the correspondence with the specific means described in the embodiments described later.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
(First embodiment)
1 and 2 show an electric actuator system according to an embodiment of the present invention applied to an air conditioner for a vehicle that performs air conditioning in a vehicle interior. Below, the outline of a vehicle air conditioner is demonstrated using FIG. 1, FIG.
[0012]
The vehicle air conditioner includes an air conditioning case 5 housed in an instrument panel. In the air conditioning case 5, an inside / outside air switching door 1b is rotatably supported by the case 5, and a servo for switching between inside and outside air is provided. Under the driving by the motor 100e, it is switched to the first switching position (the position indicated by the solid line in the figure), and the outside air flows into the air conditioning case 5 from the outside air inlet 5a, while the second switching position (in the figure). Is switched to the position indicated by the broken line), and the air (inside air) in the passenger compartment flows into the air conditioning case 5 from the inside air inlet 5b.
[0013]
The blower 9 blows the outside air from the outside air introduction port 5a or the inside air from the inside air introduction port 5b to the evaporator 4 as an air flow according to the rotational speed of the blower motor 100f, and the evaporator 4 blows out the air blown from the blower 9 The stream is cooled by refrigerant circulated by operation of a known refrigeration cycle. The blower motor 100f rotates the blower 9 based on the drive signal from the communication control unit 200f.
[0014]
The air mix door (A / M door) 1a is driven by a servo motor 100d, and a cooling air flow blown from the evaporator 4 is flown into the heater core 3 and an air flow bypassing the heater core 3 (hereinafter referred to as bypass cooling air flow). And).
[0015]
Since the airflow flowing into the heater core 3 is heated by the engine cooling water (warm water) in the heater core 3, the warm air is blown out from the heater core 3. Along with this, the warm air blown out from the heater core 3 and the bypass cooling air flow are mixed and flow toward the outlet doors 1c, 1d, and 1e. The mixing ratio SW (%) between the warm air and the bypass cooling air flow is determined by the opening degree of the air mix door 1a.
[0016]
The air outlet door 1c is switched from the first switching position (the position indicated by the solid line in the figure) to the second switching position (the position indicated by the broken line in the figure) in the differential mode under the drive of the servo motor 100c. The part 5c is opened and air is blown out mainly from the opening 5c toward the front windshield.
[0017]
The blowout door 1e is switched from a first switching position (a position indicated by a solid line in the figure) to a second switching position (a position indicated by a broken line in the figure) in the face mode under the drive of the servo motor 100b. The portion 5e is opened, and air is blown out from the opening 5e toward the upper body of the passenger in the passenger compartment.
[0018]
The air outlet door 1d is switched from the first switching position (the position indicated by the solid line in the drawing) to the second switching position (the position indicated by the broken line in the drawing) in the foot mode under the drive of the servo motor 100a. The opening 5d is opened and air is blown out from the opening 5d toward the passenger's lower half of the passenger compartment.
[0019]
Each of the doors 1a to 1e is formed into a plate shape with resin or the like. In addition, hereinafter, in order to distinguish the air outlet doors 1c, 1d, and 1e, they are also referred to as a differential air outlet door 1c, a foot air outlet door 1d, and a face air outlet door 1e, respectively.
[0020]
As shown in FIG. 2, the electronic control unit 400 includes a memory 420, a microcomputer 410, and the like, and the vehicle interior temperature detected by the interior air temperature sensor S1 and the solar radiation intensity detected in the vehicle interior by the solar radiation sensor S2. Servo motors 100a to 100e and blower motors through communication control units 200a to 200f based on the outside temperature detected by the outside air temperature sensor S3 and the set temperature output from the temperature setter Re set by the passenger. 100f is controlled.
[0021]
Here, the servo motors 100a to 100e, the blower motor 100f, and the electronic control device 400 are connected in a bus shape by the bus line 300, and the bus line 300 is commonly connected by the servo motors 100a to 100e and the blower motor 100f. The power line 300a, the communication line 300b, and the ground line 300c.
[0022]
In the present embodiment, priorities are set for the functions of each motor with respect to the servo motors 100a to 100e and the blower motor 100f. Specifically, the servo motor 100e (electric actuator for switching the inside / outside air), the servo motor 100c (electric actuator for switching the outlet), the servo motor 100a (electric actuator for switching the outlet), the servo motor 100b (air outlet) The order of priority is lower in the order of switching electric actuator), blower motor 100f (electric actuator for blower), servo motor 100d (electric actuator for temperature adjustment).
[0023]
The communication control units 200a to 200f are set with priority orders corresponding to the priority orders for each motor. Specifically, the priority is lower in the order of the communication control unit 200e, the communication control unit 200c, the communication control unit 200a, the communication control unit 200b, the communication control unit 200f, and the communication control unit 200d. The communication control units 200a to 200f are connected to the bus line 300 closer to the electronic control device 400 as its own priority is higher.
[0024]
Next, the configuration of the servo motors 100a to 100e will be described with reference to FIGS. Hereinafter, the servo motor 100d will be described.
[0025]
FIG. 3 is an external view of the servo motor 100e, and FIG. 4 is a configuration diagram of the servo motor 100e. In FIG. 4, the DC motor 110 is supplied with electric power and rotates the output shaft 111, and the speed reduction mechanism 120 decelerates the rotational force input from the DC motor 110 and outputs it to the door 1b. It is a transmission mechanism. Hereinafter, a mechanism unit that rotationally drives the DC motor 110, the speed reduction mechanism 120, and the like is referred to as a drive unit 130.
[0026]
Here, the speed reduction mechanism 120 is a gear train including a worm 121 press-fitted into the output shaft 111 of the DC motor 110, a worm wheel 122 meshing with the worm 121, and a plurality of spur gears 123, 124, 125. The final stage gear (output side gear) 126 located on the side is provided with an output shaft 127.
[0027]
The casing 140 is a casing that houses the drive unit 130 and has brushes (electrical contacts) 155 to 157 to be described later fixed thereto.
[0028]
Further, as shown in FIGS. 5 to 7 (particularly, refer to FIG. 7), a pulse is applied to the output side (output shaft 127) from the input gear (worm 121) directly driven by the DC motor 110 in the speed reduction mechanism 120. A pattern plate (hereinafter referred to as a pattern plate) 153 is provided. The pattern plate 153 includes first and second conductive portions 151a and 152a and non-conductive portions 151b and 152b that are alternately arranged in the circumferential direction. Pulse patterns 151 and 152 are provided and rotate integrally with the output shaft 127.
[0029]
At this time, the circumferential angles α1 and α2 of the conductive portions 151a and 152a and the circumferential angles β1 and β2 of the nonconductive portions 151b and 152b are made equal to each other, and the phase of the first pulse pattern 151 is set to the phase of the second pulse pattern 152. The circumferential angles α1 and α2 (= circular angles β1 and β2) are shifted from each other by about ½.
[0030]
The first and second pulse patterns 151 and 152 are electrically connected, and the first and second pulse patterns 151 and 152 are common patterns (common conductive portions) provided on the inner peripheral side of the two pulse patterns 151 and 152. Pattern) 154 and is electrically connected to the negative side of a battery (not shown) via a brush 157 described later.
[0031]
On the other hand, on the casing 140 side, first to third brushes (electrical contacts) 155 to 157 made of a copper-based conductive material connected to the positive electrode side of the battery are fixed by resin integral molding, and the first brush 155 is the first brush 155. The second brush 156 is in contact with the first pulse pattern 151, the second brush 156 is in contact with the second pulse pattern 152, and the third brush 157 is in contact with the common pattern 154.
[0032]
In this embodiment, the contact points between the first to third brushes 155 to 157 and the pattern plate 153 are two or more points (four points in the present embodiment), so that the first to first brushes 155 to 157 and the conductive plate are electrically connected. The electrical connection with the parts 151a and 152a (including the common pattern 154) is ensured.
[0033]
Further, as shown in FIG. 3, the door 1 b is press-fitted and fixed to the output shaft 127, and the air-conditioning case 5 is provided with a stopper 5 a that causes the door 1 b to collide. The mechanical structure of the servo motors 100a to 100d is substantially the same as that of the servo motor 100e.
[0034]
Next, schematic operation of the servo motors 100a to 100e will be described with reference to FIGS.
[0035]
FIG. 12 is a schematic diagram showing the communication control unit 200e of the servo motor 100e. The communication control unit 200e is output based on the motor communication control unit 210 that drives the DC motor 110 and the pulse signal generated by the pattern plate 153. The rotation angle detector (rotation angle detection means) 220 for detecting the rotation angle and rotation direction of the shaft 127, the flash memory for storing various control information, and the like can be held without being supplied with power. And a communication circuit 250 that communicates with the electronic control device 400 through the communication line 300c.
[0036]
When the DC motor 110 rotates and the output shaft 127 (pattern plate 153) rotates, the first and second brushes 155 and 156 and the conductive portions 151a and 152a are in an energized (ON) state, and the first and second A non-energized (OFF) state in which the brushes 155 and 156 and the non-conductive portions 151b and 152b are in contact with each other periodically occurs.
[0037]
Accordingly, as shown in FIG. 9, the first and second brushes 155 and 156 generate a pulse signal every time the DC motor 110 rotates by a predetermined angle, and this pulse signal is counted by the rotation angle detector 220. As a result, the rotation angle of the output shaft 127 can be detected.
[0038]
As is clear from the above description, in this embodiment, a pulse generator (pulse generator) that generates a pulse signal each time the output shaft 127 rotates by a predetermined angle by the first and second brushes 155 and 156 and the pattern plate 153. (Means) 158 (see FIG. 8).
[0039]
Further, since the phase of the first pulse pattern 151 and the phase of the second pulse pattern 152 are out of phase, the pulse generator 158 generates a pulse signal (hereinafter referred to as this signal) generated by the first pulse pattern 151 and the first brush 155. A pulse signal is referred to as an A-phase pulse), and a pulse signal that is out of phase with respect to an A-phase pulse generated by the second pulse pattern 152 and the second brush 156 (hereinafter, this pulse signal is referred to as a B-phase pulse). ) Occurs.
[0040]
For this reason, in this embodiment, the rotation direction of the DC motor 110 (output shaft 127) is detected depending on which signal of the A-phase pulse and the B-phase pulse is input to the rotation angle detector 220 first. Yes.
[0041]
Further, when controlling the rotation amount of the DC motor 110, that is, the rotation amount of the output shaft 127, the position where the rotation of the DC motor 110 is mechanically stopped by colliding the door 1b with the stopper 5a is stored as the origin position. Thereafter, except for the case where the battery B is disconnected and the case where an abnormality occurs in the pulse signal, the DC motor 110 is controlled based on the position shifted by two pulses from the origin position.
[0042]
Hereinafter, the act of storing the position where the door 1b collided with the stopper 5a and mechanically stopping the rotation of the DC motor 110 as an origin position and setting a work reference deviating from the origin position is referred to as (initial position setting). Call. Incidentally, in this embodiment, when the change of a pulse signal stops, it determines with the door 1b having collided with the stopper 5a. Note that the communication control units 200a to 200d are configured in substantially the same manner as the communication control unit 200e.
[0043]
Next, the communication control unit 200f will be described with reference to FIG. The communication control unit 200f is supplied with power through a communication circuit 520 that communicates with the electronic control device 400 via the communication line 300C, a motor drive circuit 530 that controls the rotation speed of the blower motor 100f, and a power supply line 300a, and supplies a constant voltage. It comprises a constant voltage circuit 510 that outputs to a communication circuit 520 and a motor drive circuit 530.
[0044]
Next, the operation of the present embodiment will be described with reference to FIGS. FIG. 11 is a flowchart showing the air conditioning control process by the microcomputer 410 of the electronic control unit 400, and FIG. 12 is a flowchart showing details of the failure determination process of FIG.
[0045]
The microcomputer 410 executes a computer program stored in the memory 420 according to the flowcharts of FIGS. 11 and 12. This computer program is repeated at regular intervals when the ignition switch IG is turned on. The ignition switch IG is a switch that is operated by a passenger to allow the microcomputer 410 to supply power from the battery B.
[0046]
First, in the initial control, it is determined based on the initial setting flag in the memory 420 whether or not the initial setting condition is satisfied, that is, whether or not “initial position setting” is necessary at the current time.
[0047]
For example, when the ignition switch IG is turned on in a state where the “initial position setting” (initialization) of the servo motors 100a to 100e has not been performed after the battery B is connected to the vehicle, the “initial position setting” is Determine that it is necessary. Here, the initial setting flag is reset by the microcomputer 410 when the battery B is connected to the vehicle, and is set when “initial position setting” is performed as will be described later.
[0048]
Thereafter, an ID code set in advance for each motor is added to a stop signal for stopping the blower motor 100f and output to the communication line 300b. Accordingly, when the motor drive circuit 530 of the communication control unit 200f receives the ID code and the stop signal through the communication circuit 520, and determines that the ID code stored in advance matches the received ID code. The blower motor 100f is stopped.
[0049]
Next, an instruction signal for instructing “initial position setting” to each of the servo motors 100a to 100e is added to an ID code preset for each motor and output to the communication line 300b. Accordingly, for example, the motor drive circuit 210 of the communication control unit 200a receives the ID code and the command signal through the communication circuit 250, and confirms that the ID code stored in advance matches the received ID code. If determined, the initial position is set for the servo motor 100a. Similarly, the communication control units 200b to 200d perform initial position setting for the servo motors 100b to 100d (S101).
Next, it is determined whether or not an abnormality has occurred in communication with the communication control unit 200e for the blower motor (S102). Specifically, an ID code for each motor set in advance is added to the calling signal for calling the communication control unit 200e and output to the communication line 300b.
[0050]
Here, when the bus line 300 is normal between the communication control unit 200e and the electronic control device 400, the communication circuit 250 of the communication control unit 200e receives the ID code and the calling signal, and the received ID code and If it is determined that the ID code stored in advance matches, the ID code stored in advance is added to the response signal in response to the calling signal and output to the communication line 300b.
[0051]
Accordingly, the microcomputer 400410 of the electronic control device 400 determines that communication with the communication control unit 200e is possible and, in turn, the blower motor 100f can be controlled according to the response signal and the ID code. In this case, the air-conditioning control process at the normal time is executed as will be described later.
[0052]
Further, when the power supply line 300a of the bus line 300 is disconnected at the A position between the communication control unit 200e and the electronic control device 400, the communication circuit 250 of the communication control unit 200e outputs an ID output from the electronic control device 400. The code and the call signal cannot be received, and a response signal for the call signal cannot be output. Here, when the electronic control device 400 does not receive a response signal for a certain period after transmitting the calling signal, the bus line 300 is disconnected between the communication control unit 200e and the electronic control device 400, and the communication control unit 200e. As a result, it is determined that the blower motor 100f cannot be controlled (S102).
[0053]
Here, when the bus line 300 is disconnected between the communication control unit 200e and the electronic control device 400, the blower 9 cannot generate air. That is, the conditioned air cannot be blown out into the passenger compartment. For this reason, the air-conditioning state in the vehicle interior cannot be controlled, and the vehicle front windshield or the like may be clouded.
[0054]
Therefore, the electronic control unit 400 performs control different from that in the normal state with respect to the controllable servo motor 100e. That is, an ID code of the servo motor 100e is added to a command signal (control signal) for introducing outside air and output to the communication line 300c. Accordingly, for example, the motor drive circuit 210 of the communication control unit 200e receives the ID code and the command signal through the communication circuit 250, and confirms that the ID code stored in advance matches the received ID code. If it determines, according to a command signal, a door will be rotated to the 1st switching position (position shown as a continuous line in a figure) to servomotor 100e (S109).
[0055]
Here, during traveling of the vehicle, the outside air is caused to flow into the air conditioning case 5 from the outside air inlet 5a, and the outside air is blown out from any one of the outlets 1c to 1d. Therefore, the vehicle front windshield is prevented from being fogged. be able to.
[0056]
Next, the air conditioning control process at normal time will be described. The sensor output output from the inside air temperature sensor S1, the solar radiation sensor S2, and the outside air temperature sensor S3 and the temperature set value output from the temperature setter Re are read (see FIG. 11 (S103), based on the respective sensor outputs and temperature set values, the target blowing temperature TAO of the air blown into the vehicle interior is calculated based on the following equation 1 stored in the memory 420 (S104).
[0057]
[Expression 1]
TAO = Kset × Tset−KR × TR−KAM × TAM−KS × TS + C where Tset is the set temperature set by the temperature setting lever Re, TR is the inside air temperature detected by the inside air temperature sensor S1, and TAM is the outside air temperature. The outside air temperature and TS detected by the sensor S2 are the amount of solar radiation detected by the solar radiation sensor S2. Kset, KR, KAM, and KS are gains, and C is a correction constant.
[0058]
Subsequently, the motor rotation speed (the blower blow rate) corresponding to the target blowing temperature TAO is determined from the characteristic chart stored in advance in the memory (S105). Specifically, the lower the target blowout temperature TAO, the higher the motor rotation speed, and the lower the target blowout temperature TAO, the lower the motor rotation speed. Then, an ID code of the blower motor 100f is added to the control signal indicating the determined motor rotation speed and output to the communication line 300b.
Accordingly, when the motor drive circuit 530 of the communication control unit 200f receives the control signal and the ID code via the communication circuit 520, the received ID code matches the ID code stored in advance in the storage circuit 230. When the determination is made, the blower motor 100f is rotated at the motor rotational speed determined as described above based on the control signal.
[0059]
Subsequently, the opening degree SW of the air mix door 1a is set in accordance with the target blowing temperature TAO, the evaporator blowing air temperature detected by the evaporator blowing air temperature sensor S4, the engine cooling water temperature detected by the water temperature sensor S5, and the like. The following formula 2 is used for determination (S106).
[0060]
[Expression 2]
SW = (TAO-TE) / (TW-TE) × 100
Here, TE is a temperature detected by the evaporation temperature sensor S4, and TW is a temperature detected by the water temperature sensor S5.
[0061]
Thereafter, the control signal indicating the determined opening degree SW is added with the ID code of the servo motor 100d and output to the communication line 300b. The motor communication control unit 210 of the communication control unit 200d of the servo motor 100d receives the ID code and the control signal via the communication unit 250, and the received ID code is converted into the ID code stored in the storage circuit 230. If it is determined that they match, the DC motor 110 rotates the air mix door 1a so as to correspond to the opening degree SW determined as described above.
[0062]
Subsequently, the outlet mode corresponding to the target outlet temperature TAO is determined from the characteristic chart stored in advance in the memory 420 (S106). Specifically, the foot mode is selected when the target blowing temperature TAO is low, and the bi-level mode is selected in order of the face mode as the target blowing temperature TAO increases.
[0063]
When the air outlet mode as described above is determined, one of the first and second switching positions (the positions indicated by the solid line and the broken line in FIG. 1) is set as the target position for each of the servo motors 100a and 100b. Decide. Then, an ID code of the servo motor 100a is added to the control signal indicating the target position determined for the face outlet door and output to the communication line 300b. Further, the ID code of the servo motor 100b is added to the control signal indicating the target position determined for the foot outlet door, and is output to the communication line 300b.
[0064]
Accordingly, the motor communication control unit 210 of the communication control unit 200a receives the ID code and the control signal via the communication unit 250, and when the received ID code matches the ID code stored in the storage circuit 230. When the determination is made, the face air outlet door 1e is rotated to the target position by the DC motor 110. Similarly, the motor communication control unit 210 of the communication control unit 200b rotates the foot outlet door 1 to the target position by the DC motor 110 according to the control signal received via the communication unit 250.
[0065]
For example, when the foot mode is selected, the outlet doors 1d and 1e are rotated to open the opening 5e and close the opening 5d. When the face mode is selected, the air outlet doors 1d and 1e are rotated to open the opening 5d and close the opening 5e. When the bi-level mode is selected, the air outlet doors 1d and 1e are rotated to open the openings 5e and 5d.
[0066]
Subsequently, an inside / outside air mode corresponding to the target blowing temperature TAO is determined from a characteristic diagram stored in advance in the memory 420 (S107). Specifically, the inside air circulation mode is selected when the target blowing temperature TAO is high, and the outside air introduction mode is selected when the target blowing temperature TAO is low. Accordingly, an ID code of the servo motor 100e is added to the control signal indicating the selected inside / outside air mode and output to the communication line 300b.
[0067]
Accordingly, the motor communication control unit 210 of the communication control unit 200e of the servo motor 100e receives the ID code and the control signal via the communication unit 250, and the received ID code is stored in the storage circuit 230. If it is determined that the codes match, the DC motor 110 rotates the inside / outside air switching door 1b to the target position corresponding to the inside / outside air mode selected as described above.
[0068]
For example, when the inside air circulation mode is selected, the inside / outside air switching door 1b is rotated to the second switching position as the target position by the DC motor 110, thereby opening the inside air introduction port 5b and closing the outside air introduction port 5a. When the outside air introduction mode is selected, the inside / outside air switching door 1b is rotated to the first switching position as the target position by the DC motor 110, thereby closing the inside air introduction port 5a and opening the outside air introduction port 5b.
[0069]
Next, the effect of this embodiment is demonstrated. The communication control units 200a to 200f correspond to the priority order of functions for each motor, and the higher the priority order is, the closer to the electronic control device 400 is connected. Thereby, the communication control unit with a higher priority is connected closer to the electronic control device 400 than the communication control unit with a lower priority. Therefore, the probability of occurrence of disconnection between the communication control unit (for example, the communication control unit 200d) that controls the motor with high priority and the electronic control device 400 can be reduced, and the servo motor (for example, the servo motor 100e) having an important function is reduced. ) Can be driven.
[0070]
(Second Embodiment)
In the above-described embodiment, only one end portion of the bus line 300 is connected to the electronic control device 400, but both end portions of the bus line 300 may be connected to the electronic control device 400 as shown in FIG.
[0071]
In this case, even if the line B is disconnected, the communication control unit 200c is connected to the electronic control device 400, and the communication control units 200a, 200b, and 200d to 200f are also connected to the electronic control device 400. Is disconnected, all the servo motors 100a to 100e and the blower motor 100f can be controlled.
[0072]
However, if the circuit is disconnected not only at the B position but also at the C position, the servo motors 100c and 100e can be driven, but the other motors 100a, 100b, 100d, and 100f cannot be controlled. Therefore, as shown in FIG. 13, the order in which the communication control units 200 a to 200 f are connected to the bus line 300 is set corresponding to the priority order for each motor.
[0073]
As shown in FIG. 13, the communication control unit 200 c that controls the servo motor 100 c having the highest priority is connected near the electronic control device 400 on one end side of the bus line 300. The communication control unit 200e that controls the servo motor 100e having the second priority is connected near the electronic control device 400 on the other end side of the bus line 300. In this way, even if disconnection occurs at two locations B and C, the two servo motors 100c and 100e can be driven from the higher priority order.
[0074]
(Other embodiments)
In the above-described embodiment, the position where the doors 1a to 1e collide with the stopper 5a to mechanically stop the rotation of the servo motors 100a to 100e is stored as the origin position, and thereafter, the servo is performed using the origin position as the operation reference. Although the motors 100a to 100e are controlled, the servo motors 100a to 100e may be controlled using the position shifted from the origin position as an operation reference.
[0075]
In the above embodiment, when the ignition switch IG is turned on in a state where the “initial setting” of the servo motors 100a to 100e has never been performed after the battery B is connected to the vehicle, the “initial setting” is set. Although the example determined to be necessary has been described, the following may be used instead.
[0076]
(1) When the ignition switch IG is turned off in a state where the “initial setting” of the servo motors 100a to 100e has never been performed after the battery B is connected to the vehicle, the “initial setting” is necessary. May be determined.
[0077]
(2) If the ignition switch IG is turned off immediately after detecting an abnormality in the servo motors 100a to 100e, it may be determined that “initial setting” is necessary.
[0078]
(3) When the ignition switch IG is turned on immediately after detecting an abnormality in the servo motors 100a to 100e, it may be determined that “initial setting” is necessary.
[0079]
Here, in order to detect the abnormality of the servo motor, the signals of the A phase pulse and the B phase pulse output from the pulse generator 158 to the rotation angle detector 220 using the pulse generator 158 and the rotation angle detector 220 are detected. It is determined whether or not the signal is periodically generated, and when one of the A-phase pulse and the B-phase pulse is not periodically generated, that is, when the cycle of one of the signals is disturbed Suppose a servo motor error occurs.
[0080]
In the above-described embodiment, the present invention has been described by taking a sliding contact type position detection device as an example. However, the present invention is not limited to this, and can be applied to other position detection devices such as an optical encoder. can do.
[0081]
In the above-described embodiment, the pulse generator 158 is provided on the output shaft 127. However, the present invention is not limited to this, and for example, a rotating part further decelerated for the pulse generator 158 (pulse plate 153) is provided. A pulse signal may be generated.
[0082]
In the above-described embodiment, the common pattern (common conductive portion pattern) 154 provided on the inner peripheral side from the both pulse patterns 151 and 152 is provided. However, the present invention is not limited to this, and both pulse patterns 151 are provided. , 152 may be provided on the outer peripheral side, or a common pattern 154 may be provided between both pulse patterns 151, 152.
[0083]
In the above-described embodiment, the present invention is applied to the vehicle air conditioner, but the application of the present invention is not limited to this.
[0084]
In the above-described embodiment, the rotation of the servo motors 100a to 100e is mechanically stopped at the origin position. However, the present invention is not limited to this, and power supply to the servo motor is stopped to stop the servo motor. The rotation of 100a to 100e may be stopped at the origin position.
[0085]
In the above-described embodiment, when it is determined whether or not the servo motors 100a to 100e are assembled at an incorrect position, the determination result may be stored in the memory 420.
[0086]
In the above-described embodiment, when it is determined whether or not the servo motors 100a to 100e are assembled at an incorrect position, the determination result may be stored in the memory 420.
[0087]
In the above-described embodiment, an example in which a servo motor is used as an electric motor has been described. However, the present invention is not limited to this, and a DC motor 110 or an AC motor may be used.
[Brief description of the drawings]
FIG. 1 is a schematic diagram of a vehicle air conditioner according to an embodiment of the present invention.
FIG. 2 is a diagram showing a connection configuration of the electronic control unit and the servo motor of FIG. 1;
FIG. 3 is a view showing an outer shape of the servo motor of FIG. 1;
4 is a diagram showing a schematic configuration of the servo motor of FIG. 1; FIG.
5A is a front view of the pulse plate of FIG. 4, and FIG. 5B is a side view of FIG.
6 is a cross-sectional view taken along the line AA in FIG.
7 is an enlarged view of the pulse plate of FIG.
8 is a block diagram showing a schematic electric circuit configuration of the servo motor of FIG. 1. FIG.
9 is a pulse signal chart of the servo motor of FIG.
10 is a diagram showing an electric circuit configuration of a communication control unit in FIG. 1. FIG.
FIG. 11 is a flowchart showing processing of the electronic control device of FIG. 1;
12 is a flowchart showing a part of the processing of FIG.
FIG. 13 is a diagram showing a connection configuration of an electronic control device and a servo motor according to a second embodiment of the present invention.
FIG. 14 is a diagram showing a connection configuration of a conventional electronic control unit and a servo motor.
[Explanation of symbols]
100a to 100e ... Servo motor,
220 ... rotation angle detector,
200a-200e ... communication control part,
400 ... Electronic control unit
410: Microcomputer
420: Memory.

Claims (3)

Each electric actuator (100a-100f);
Each communication control unit (200a to 200f) that is provided for each electric actuator and controls each electric actuator according to a control signal input for each electric actuator;
An electronic control unit (400) that is connected to at least one electric wire (300) to which the communication control units are commonly connected and outputs a control signal for each electric actuator to each of the communication control units. ,
Each communication control unit is set with a priority corresponding to the function of each electric actuator,
Furthermore, each of the communication control units is an actuator system that is connected to the electronic control device closer to the electric wire as the priority is higher .
The actuator system is applied to a vehicle air conditioner,
Among the plurality of electric actuators, an electric actuator (100e) for switching between the inside and outside air for switching and introducing air and outside air in the vehicle interior, and an electric actuator (100f) for a blower for blowing air Is included,
The priority of the electric actuator for switching between the inside and outside air is set higher than the priority of the electric actuator for the blower,
When the electronic control unit determines that the electric actuator for the blower is uncontrollable, the electronic control unit outputs a control signal for introducing outside air into the electric actuator for switching between the inside and outside air . Among the plurality of electric actuators, further includes electric outlet switching actuators (100a to 100c) for switching an air outlet that blows air into the passenger compartment.
The electric actuator for switching the inside / outside air, the electric actuator for switching the blowout port, and the electric actuator for the blower are set in this order so that the priority of the function for each electric actuator becomes lower. The actuator system according to claim 1. Among the plurality of electric actuators, further includes a temperature adjusting electric actuator (100d) for adjusting the temperature of air blown into the passenger compartment,
In order of the electric actuator for switching the inside / outside air, the electric actuator for switching the outlet, the electric actuator for the blower, and the electric actuator for adjusting the temperature, the priority order of the functions of the electric actuators is lowered. the actuator system of claim 2, characterized in that it is set.

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