JP2002067834A - Vehicle system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To decrease the number of computers requiring dark current and suppress the power consumption after the ignition switch is turned off by utiliz ing EEPROMs or an HDD of the whole vehicle information communications system. SOLUTION: The vehicle information communications system works using the data from a memory having durability or a storage medium HDD 101 in priority as a storage means or recording medium to store the manual operation information of a driver/passenger after the ignition switch is turned off or using in priority the data from non-volatile memories EEPROMs 92, 202, 302, 402 or the storage medium HDD 101 not requiring any power supply, whereby it is practicable to decrease the number of microcomputers requiring dark current, reducing the power consumption after the ignition switch is turned off, and suppressing exhaustion of a backup power supply such as a car on- board power supply.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to at least a CPU
And a vehicle system provided with an automatic air-conditioning system, an engine control system, a multiplex communication system, a car navigation system, and the like using a computer including a function of a nonvolatile memory. Related to power consumption control.

[0002]

2. Description of the Related Art At present, particularly in a vehicle system, many microcomputers share functions and communicate with each other, and a power train control for electronically controlling an engine or a transmission, or a vehicle for electronically controlling a suspension, a steering or a brake. Control, or body control for electronically controlling an automatic air conditioner, an information device, a display device, a power seat, a seat belt, or a door lock is implemented.

[0003]

However, in a conventional vehicle system, a CPU and a memory (ROM, RA, etc.) are provided for each computer for electronically controlling various actuators.
M), I / O ports and other functions. In particular, while the ignition switch is turned off, that is, while the engine is turned off, occupant operation information and information necessary for control (for example, time information of a digital clock, or destination search information or route search information in car navigation, or In order to store history information in ETC (automatic toll collection system for toll roads),
A backup power supply is required for all computers, and if the engine is turned off for a long time, power consumption will increase due to dark current supplied to multiple computers.
There is a problem that the power source of the vehicle is consumed and the battery is dead. Further, even while the vehicle is running, power consumption leads to deterioration of fuel efficiency, and therefore it is desirable to reduce the power consumption as much as possible.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a vehicle system capable of reducing power consumption by utilizing a storage means of each computer or a storage medium of each device of the entire system. It is also an object of the present invention to provide a vehicle system capable of reducing the dark current of many computers that electronically control system components (controlled objects) such as in-vehicle electronic components and actuators mounted on the vehicle after the operation of the vehicle driving unit is stopped. It is in.

[0005]

Means for Solving the Problems Claims 1 and 2
According to the invention described in (1), the occupant's operation information or information necessary for control is preferentially stored in a storage means of a computer or a storage medium of an apparatus having a predetermined high priority, so that all the computers are backed up. Power consumption can be suppressed as compared with the case where a function is provided. As a result, the power consumption of the entire vehicle can be reduced as a whole, so that the consumption of the vehicle-mounted power supply can be suppressed, and the battery can be prevented from running out. In addition, since the power consumption can be reduced even while the vehicle is running, fuel efficiency is improved. Here, the system components that are electronically controlled by the microcomputer or operated by the devices are control targets such as vehicle-mounted electronic components mounted on the vehicle and actuators that drive the vehicle-mounted devices.

According to the third and fourth aspects of the present invention, the operation information of the occupant or the information necessary for control is stored in a storage means of a computer with high durability or with little or no power consumption or in a device. By preferentially storing data in the medium, the number of computers requiring dark current can be reduced. According to the fifth aspect of the present invention, the operation information of the occupant or the information necessary for control is preferentially stored in a storage means of a computer or a storage medium of a device capable of reading or writing at high speed. Accordingly, the number of computers requiring dark current can be reduced. Therefore, consumption of the vehicle-mounted power supply can be suppressed, and the battery can be prevented from running out. In addition, since the power consumption can be reduced even while the vehicle is running, fuel efficiency is improved.

According to the present invention, important information is stored in storage means of at least two high-priority computers or storage media of devices by storing important information.
Loss of stored important information can be prevented. According to the seventh aspect of the present invention, the type of storage means or storage medium, storage capacity, read / write time, power consumption, or durability information is transmitted and received by communication, so that such information is stored in advance. For example, it is possible to easily cope with a case where a new storage unit or storage medium is added.

According to the invention described in claim 8, when information is stored, it is possible to further clarify which system component corresponds to the information by storing the information in combination with the device code of the information transmission source. Each piece of information corresponding to a plurality of system components can be mixed in one storage unit or storage medium. According to the ninth aspect of the present invention, after the operation of the vehicle driving means is stopped, the occupant's operation information or information necessary for control is stored, whereby the dark current after the operation of the vehicle driving means is stopped is reduced. The number of required computers can be reduced. Therefore, consumption of the vehicle-mounted power supply can be suppressed, and the battery can be prevented from running out.

According to the tenth aspect of the present invention, the reading process is performed when the user approaches the vehicle, opens the door, or sits on the seat, so that the user can operate each system component before operating the system components. , Necessary information can be read out. According to the eleventh aspect of the present invention, when electric power is used to store occupant operation information or information necessary for control, when the voltage of the vehicle-mounted power supply falls below a predetermined value, the occupant is By stopping the storage of the operation information or the information necessary for control, the consumption of the vehicle-mounted power supply can be suppressed, and the battery can be prevented from running out.

According to the twelfth aspect of the present invention, by transmitting and receiving the occupant's operation information or information necessary for control wirelessly, the wire harness can be simplified and reduced in weight, and sensors and the like can be shared. According to the thirteenth aspect of the present invention, when a failure of a computer or device is determined, the operation information of the occupant or the information necessary for control is transferred to a storage unit of another computer or a storage medium of the device. Loss of stored contents can be prevented.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS [Structure of Embodiment] FIGS. 1 to 8 show an embodiment of the present invention, and FIG. 1 is a diagram showing an entire structure of a vehicle information communication system.

The vehicle information communication system according to the present embodiment comprises a car navigation system, a gasoline engine control system, a vehicle information display system, a body control system, an auto air conditioner system, and the like. ing.

First, a car navigation system includes a map display function, a data search function for searching for a destination, a route search function for searching for an optimal route to a destination, a guidance function for guiding a road to a destination, and a voice. It has functions such as control, notification of road congestion, and congestion. The car navigation system is electronically controlled by the navigation ECU 100. The navigation ECU 100 is an electronic circuit for car navigation control that electronically controls car navigation, and includes an input device (not shown) such as a remote controller, an HDD 101,
This is a route information display device including a microcomputer (not shown) configured to include functions of a CPU, a ROM, a RAM, and an I / O port. Here, the HDD 10
Reference numeral 1 denotes a hard disk drive, which is a storage medium (storage medium) for reading and writing various data on a magnetic disk rotated at a high speed by a magnetic head, and has a DVD-ROM and a DVD-RAM for storing map data and the like. are doing.

For the detection of the current position by the navigation ECU 100, self-contained navigation, GPS (global positioning system) or the like is used. In self-contained navigation, the heading sensor or yaw rate sensor detects the change in the traveling direction, and the traveling distance detected by the wheel speed sensor is superimposed on it to calculate the current position of the vehicle. The on-board cathode ray tube (CRT) or liquid crystal Display (LC
D) The current position of the vehicle is displayed on the map. Also, GP
In S, radio waves are received from four artificial satellites, and the current position of the vehicle is calculated from the time difference.

The gasoline engine control system comprehensively controls the engine mounted on the vehicle by the engine ECU 200, operates the engine in an optimum state, improves power performance, purifies exhaust gas, and improves fuel efficiency. It is a device which can obtain. Here, the engine ECU 2
Reference numeral 00 denotes an electronic circuit for engine control for electronically controlling the engine.
2. It has a microcomputer configured to include the functions of a RAM 203 and an I / O port (not shown).

The engine ECU 200 stores at least an engine rotation speed sensor, a vehicle speed sensor, a wheel speed sensor, a throttle opening sensor, a cooling water temperature sensor (all not shown), and input signals input from the air conditioner ECU 10 described later. Based on a control program (not shown), it performs engine control such as fuel injection control, ignition timing control, knock control, idle speed control, and diagnosis, and is necessary for arithmetic processing of the navigation ECU 100 and arithmetic processing of the air conditioner ECU 10. And sends a signal to the navigation ECU 100 and the air conditioner ECU 10.

The engine ECU 200 may also centrally control system components of a power transmission system such as a transmission. In this case, for example, drive distribution is set to 0: 100.
(Split drive state) to 50:50 (Rigid four-wheel drive state), torque split 4WD system that electronically controls in a stepless manner with a hydraulic multi-plate clutch, 4WD that automatically switches between two-wheel drive state and four-wheel drive state There is a system. These are operated by a switch operation as an input means, such as “two-wheel drive state”, “four-wheel drive state”, “AUT
The driving mode can be changed by switching "O".

The vehicle information display system includes an instrument panel ECU.
300, an electronic meter such as a tachometer or a speedometer, or information on a running state of an engine rotation speed, a vehicle speed, a cooling water temperature and other electronic control systems (driving monitor), information on fuel consumption rate and fuel consumption (fuel consumption monitor) ), The damping force adjustment state of the electronically controlled variable damper can be controlled by a color CRT, fluorescent display tube (VFD), liquid crystal display (LCD), driver's seat belt non-wearing warning light, fuel remaining warning light, shift position indicator light, etc. This is a device for displaying on a display device. Further, the device constantly monitors disconnection of the tail lamp, the stop lamp, and the headlamp, and turns on an indicator lamp to notify the driver when the disconnection occurs. Further, the device is a device for notifying the driver of the overdrive or the underdrive by lighting an indicator lamp.

In the case of an RV car, a device for displaying a seat layout (seat arrangement) according to the number of occupants and the amount of luggage on a display device by rotating or removing the seat or folding the seat, or operating an automatic air conditioner The display device may display the status or whether the seat heater is used or not. Here, the instrument panel ECU 3
00 is itself a CPU 301, an EEPROM 30
2. It has a microcomputer configured to include the functions of a RAM 303 and an I / O port (not shown).

The body control system includes a body ECU 40
0 means suspension control, cruise control (cruise control), steering control, skid control,
This device performs light control, door lock control, lamp disconnection detection, wiper control, power seat control, seat heater control, rear obstacle detection, and electronic control of a multiplex communication system. Here, the body ECU 400 is itself a CPU.
401, EEPROM 402, RAM 403 and I / O
It has a microcomputer configured to include the function of an O port (not shown).

Among the above, for example, suspension control is a system in which the damping force of the electronically controlled variable damper is changed by operating a switch as input means, and door lock control is performed by operating a switch on the driver's seat side as input means. This system locks or unlocks all doors, locks or unlocks doors other than the driver's side door, and automatically locks all doors when the vehicle speed is higher than a predetermined value. . By operating the child lock switch, the door opening operation of the door can be limited to the outdoor side only. Power seat control is performed by operating the motor to adjust the seat slide, front vertical, lifter,
This system performs reclining adjustment and the like.

Next, an automatic air-conditioning system according to this embodiment will be described with reference to FIGS. Here, FIG.
FIG. 3 is a view showing the entire configuration of the automatic air-conditioning system, FIG. 3 is a view showing an instrument panel of the vehicle, and FIG.
FIG. 3 is a diagram showing an air conditioner operation panel.

The automatic air-conditioning system according to the present embodiment
Each air conditioning unit (actuator) in the air conditioning unit 1 for air conditioning the interior of a vehicle such as an automobile equipped with an engine as a vehicle drive unit is controlled by an air conditioning control device (hereinafter, referred to as an air conditioning ECU) 10. I have. The air conditioning unit 1 controls the temperature of the driver's seat (including the rear seat on the right side of the vehicle) and the air conditioning zone on the passenger's seat (including the rear seat on the left of the vehicle) and changes the outlet mode. It is an air conditioning unit that can be operated independently.

The air-conditioning unit 1 has an air-conditioning duct 2 disposed in front of the interior of the vehicle. On the upstream side of the air conditioning duct 2, an inside / outside air switching door 3 and a blower 4 are provided. The inside / outside air switching door 3 is suction port switching means driven by an actuator such as a servo motor 5 as a system component to change the opening degree (a so-called suction port mode) between the inside air suction port 6 and the outside air suction port 7. Blower 4
Is a system component, which is a centrifugal blower that is rotated and driven by a blower motor 9 controlled by a blower drive circuit 8 and generates an airflow toward the vehicle interior in the air conditioning duct 2.

At the center of the air conditioning duct 2, an air conditioning duct 2
An evaporator (cooling heat exchanger) 41 for cooling the air passing through the inside is provided. A heater core (heating heat exchanger) 4 for heating air passing through the first and second air passages 11 and 12 is provided downstream of the evaporator 41.
2 are provided. In addition, the first air passage 11 and the second air passage 12 are partitioned by a partition plate 14.

On the downstream side of the heater core 42, a driver side and a passenger side air mix (A / A / B) for independently controlling the temperature of the driver side air conditioning zone and the passenger side air conditioning zone in the vehicle cabin. M) Doors 15, 16 are provided.
The driver's seat side and the passenger seat side A / M doors 15 and 16 are
Driven by actuators such as servomotors 17 and 18, the temperature of the air blown toward the driver's seat side and the passenger's seat side is adjusted.

Here, the evaporator 41 of the present embodiment
Is a component of the refrigeration cycle. The refrigeration cycle is driven by an output shaft of a vehicle running engine mounted in an engine room of the vehicle, and is driven by a belt. The refrigerant compressor compresses and discharges the refrigerant. A refrigerant condenser (condenser) for condensing and liquefying, a liquid receiver (receiver) for separating liquid refrigerant flowing from the condenser into gas and liquid, an expansion valve for adiabatically expanding the liquid refrigerant flowing from the receiver, and an expansion valve The above-described evaporator (refrigerant evaporator) 41 for evaporating and evaporating the inflow gas-liquid two-phase refrigerant.

Of these, the compressor is a system component, and the rotational power from the engine is intermittently connected by an electromagnetic clutch controlled by the air conditioner ECU 10. When the electromagnetic clutch is turned on and the compressor is started, the evaporator 41 cools and dehumidifies the air passing through the air conditioning duct 2. In the present embodiment,
The post-evaporation temperature (T
A variable displacement compressor having an electromagnetic displacement control valve for performing displacement control based on a control signal output in accordance with a comparison result between E) and the target post-evaporation temperature (TEO) is used.

As shown in FIGS. 2 and 3, a defroster (DEF) outlet 20 is provided at the downstream end of each of the outlet ducts communicating with the downstream side of the first air passage 11.
A driver side center face (FACE) outlet 21, a driver side side face (FACE) outlet 22, and a driver side foot (FOOT) outlet 23 are open.
At the downstream end of each of the air outlet ducts communicating with the downstream side of the second air passage 12, a passenger side center face (FACE) outlet 31 and a passenger side side face (F) are provided.
ACE) Vent outlet 32 and passenger side foot (FOOT)
The outlet 33 is open.

In the first and second air passages 11 and 12, the driver side and the passenger side for setting the air outlet mode for the driver side and the passenger side in the vehicle compartment independently of each other. Side outlet switching doors 24 to 26, 35, and 36 are provided. Then, the driver side and the passenger side side air outlet switching doors 24 to
Reference numerals 26, 35, and 36 denote mode switching doors that are driven by actuators such as servo motors 28, 29, and 39 as system components to switch between a driver side and a passenger side outlet mode. Here, the outlet mode on the driver's seat side and the passenger's seat side include a FACE mode, a B / L mode, a FOOT mode, an F / D mode, a DEF mode and the like. The FACE outlets 21 and 22 and FAC
A plurality of swing louvers capable of changing the blowout direction of the conditioned air blown out from each blowout outlet are attached to the center grill and the side grilles forming the E blowout openings 31 and 32, respectively.

In the air conditioner ECU 10, an ignition switch for starting and stopping the engine is turned on (IG · O).
N), when DC power is supplied from a battery (not shown) which is a vehicle-mounted power supply mounted on the vehicle, the arithmetic processing and the control processing are started. As shown in FIG. 2 and FIG.
Each switch signal is input from various switches on an air conditioner operation panel 51 installed integrally with an instrument panel 50 on the front of the vehicle interior.

The air conditioner operation panel 51 is provided with a liquid crystal display (LCD) 52. The air conditioner operation panel 51 includes an inside / outside air changeover switch 53, a front defroster switch (hereinafter, referred to as a DEF switch) 54, a rear defroster (defogger) switch 55, a dual switch 56, an outlet mode (MODE) changeover switch 57, and a blower. Air volume changeover switch 58, A / C switch 59, AUTO switch 6
0, OFF switch 61, driver's seat (DRIVER) side temperature setting switch 62, and passenger's seat (PASSENGE)
Input means such as an R) side temperature setting switch 63 is provided.

The inside / outside air changeover switch 53 of the above is
This is manual operation means for switching the suction port mode to the inside air circulation mode or the outside air introduction mode in accordance with the operation of the occupant.
The dual switch 56 is a left / right independent control command means (manual operating means) for commanding left / right independent temperature control for independently controlling the temperature in the driver side air conditioning zone and the temperature in the passenger side air conditioning zone. It is. Also, M
The ODE switch 57 is a manual operation unit that switches the outlet mode to the FACE mode, the B / L mode, the FOOT mode, or the F / D mode in accordance with the operation of the occupant. The blower air volume changeover switch 58 is a manual operation unit that switches the blower air volume to one of HI, ME, LO, and OFF in accordance with the operation of the occupant. Also, A / C
The switch 59 is a manual operation means for instructing the start or stop of the refrigeration cycle, particularly the compressor.

The LCD 52 displays the set temperatures of the air conditioning zones on the driver's seat side and the passenger's seat side, the outlet mode, the blower air volume, and the like. The driver's seat side temperature setting switch 62 is a driver's seat side temperature setting means for setting the temperature in the driver's seat side air conditioning zone to a desired temperature, and includes an up switch 62a and a down switch 62b. The passenger side temperature setting switch 63 is a passenger side temperature setting means for setting the temperature in the passenger side air conditioning zone to a desired temperature, and includes an up switch 63a and a down switch 63b.
Consisting of Note that various operation switches on the air conditioner operation panel 51 may be provided on the LCD 52.

In the air conditioner ECU 10, C
PU91, EEPROM92, RAM93, and I /
A well-known microcomputer including a function such as an O port (input / output circuit) is provided. Sensor signals from various sensors are A / D-converted by an input circuit and then input to the microcomputer. Is configured. That is, the input circuit of the air conditioner ECU 10 includes an internal air temperature sensor 71 as an internal air temperature detecting means for detecting the air temperature (internal air temperature) in the vehicle interior, and an external air temperature detecting means for detecting the air temperature (outside air temperature) outside the vehicle interior. Are connected to the outside air temperature sensor 72, and a solar radiation sensor 73 as a solar radiation detecting means for detecting the amount of solar radiation (solar radiation intensity) irradiated into the air conditioning zone on the driver's seat side and the passenger seat side.

The input circuit of the air conditioner ECU 10 has a post-evaporation temperature sensor 74 as a post-evaporation temperature detecting means for detecting the air temperature immediately after passing through the evaporator 41 (hereinafter referred to as "after-evaporation temperature"). Cooling water temperature sensor 7 as cooling water temperature detecting means for detecting the cooling water temperature
5 etc. are connected. Here, in the present embodiment, the inside air temperature sensor 71 is housed in a recess formed on the front surface of the instrument panel 50 near the driver's seat. The recess is closed by a lid 50a provided with a vent.

Here, the EEPROMs 92, 202, 302, and 402 of each microcomputer are ROMs capable of erasing and rewriting the written storage data.
In this case, the non-volatile memory in which the stored contents are not lost or erased even if the power is not continuously turned on.
01, each ECU 10, 100, 200, 300,
At 400, a shared memory is configured. Note that the EEPROM whose storage contents can be electrically erased may be replaced with an EPROM or a flash EEPROM (flash memory) whose storage contents can be erased by ultraviolet rays. RAMs 93, 203, 303, and 403 are semiconductor storage elements that can write and read data.
This is a volatile memory in which stored contents disappear or disappear when the power is turned off.

[Control Method of Embodiment] Next, an air-conditioning control method by the air-conditioning ECU 10 of this embodiment will be described with reference to FIGS. Here, FIG.
4 is a flowchart illustrating an example of a control program of the microcomputer of the CU 10.

First, the ignition switch is turned on (IG
When the power is turned on and DC power is supplied to the air conditioner ECU 10, execution of a control program (routine in FIG. 5) stored in the EEPROM 92 in advance is started. At this time, first, the H built in another microcomputer
A process of reading information (data: manual operation by the occupant) necessary for the electronic control of the auto air conditioner stored in the DD 101, the EEPROMs 202, 302, and 402 is performed. That is, the data is read into the EEPROM 92 built in the microcomputer inside the air conditioner ECU 10 (step S1).

The navigation ECU 100, engine ECU 200, instrument panel ECU 300, body EC
Similar reading processing is performed in each microcomputer of U400. Next, the contents stored in the data processing memory (RAM 93) built in the microcomputer inside the air conditioner ECU 10 are initialized (step S).
2). Next, various data are stored in a data processing memory (RAM
93). That is, switch signals from various operation switches and sensor signals from various sensors are input (step S3).

In particular, an output signal (internal temperature signal) TR corresponding to the internal temperature which is a detection value of the internal temperature sensor 71, and an output signal (external temperature signal) TAM corresponding to the external temperature which is a detection value of the outside temperature sensor 72. Is stored in the data processing memory. An output signal (solar sensor signal) T corresponding to the amount of solar irradiance (solar intensity) which is the detection value of the solar sensor 73.
S (Dr), TS (Pa), etc. are input and stored in the data processing memory.

Next, based on the above-mentioned stored data and the following equations (1) and (2) previously stored in the EEPROM 92, the target outlet temperature TAO (Dr) on the driver's seat side, and Target outlet temperature TA on the passenger side
O (Pa) is calculated (target outlet temperature determining means: step S4).

[0043]

(Equation 1)

(Equation 2)

However, TSET (Dr), TSET (P
a) represents the set temperature of the driver's seat side air conditioning zone and the set temperature of the passenger seat side air conditioning zone, respectively, TR and TAM represent the vehicle interior temperature and the outside air temperature, respectively, and TS (Dr), TS
(Pa) indicates the amount of solar radiation irradiated into the air conditioning zone on the driver's seat side and the passenger seat side. KSET, KR, KAM, KS, Kd
(Dr) and Kd (Pa) are a temperature setting gain, a vehicle interior temperature gain, an outside temperature gain, a solar radiation gain,
It represents the temperature difference correction gain of the driver's seat side and the passenger side air conditioning zone.

Incidentally, Ka (Dr) and Ka (Pa) represent gains for correcting the degree of influence of the outside air temperature TAM on the respective air conditioning temperatures of the driver side air conditioning zone and the passenger side air conditioning zone, respectively, and CD (Dr ) And CD (Pa) are constants according to the degree of influence, and C is a correction constant. Where Ka
(Dr), Ka (Pa), CD (Dr), CD (Pa)
Varies depending on various parameters such as the shape and size of the vehicle and the direction of air blown from each air outlet of the air conditioning unit 1.

Next, the target outlet temperatures TAO (Dr), TAO on the driver's seat side and the passenger's seat side obtained in step S4 described above.
Based on (Pa), a blower air amount {blower control voltage VA applied to the blower 4} is calculated (step S5). Specifically, the blower control voltage VA is equal to the target blowing temperature T
The blower control voltages VA (Dr) and VA (Pa) suitable for AO (Dr) and TAO (Pa) are set to EEPR in advance.
The blower control voltages VA (Dr) and VA are obtained based on the characteristic diagram of FIG.
(Pa) is obtained by averaging.

Next, the target outlet temperatures TAO (Dr), TAO on the driver's seat side and the passenger's seat side obtained in step S4 described above.
The suction port mode is determined based on (Pa) and the suction port mode characteristics with respect to the target discharge temperature shown in a characteristic diagram (not shown) stored in advance in the EEPROM 92 (step S6). Specifically, in determining the suction port mode, the target outlet temperatures TAO (Dr) and TAO (P
It is determined that a) becomes the inside air circulation mode, the inside / outside air introduction mode, and the outside air introduction mode from a low temperature to a high temperature. By operating the inside / outside air changeover switch 53 provided on the air conditioner operation panel 51, the inside air circulation (REC) mode and the outside air introduction (FR)
S) The mode is fixed to one of the suction port modes.

Next, the target blowing temperatures TAO (Dr) and TAO on the driver's seat side and the passenger's seat side obtained in step S4 described above.
Based on (Pa) and the outlet mode characteristics with respect to the target outlet temperature shown in the characteristic diagram of FIG. 7 stored in advance in the EEPROM 92, the respective outlet modes of the driver side and the passenger side air conditioning zones are determined ( Step S7). In particular,
In determining the outlet mode, the above target outlet temperature T
When AO (Dr) and TAO (Pa) are at low to high temperatures, FACE mode, B / L mode and FOO
It is determined to be in the T mode. Further, a MODE switch 57 provided on the air conditioner operation panel 51 is provided.
By operating, the air outlet mode is fixed to any one of the FACE mode, the B / L mode, the FOOT mode, and the F / D mode.

The FACE mode is an air outlet mode in which conditioned air is blown toward the upper body (head and chest) of the occupant. The B / L mode is an air outlet mode in which air-conditioning air is blown toward the upper body (head and chest) and feet of the occupant. The FOOT mode is an outlet mode in which conditioned air is blown toward the feet of the occupant. Further, the F / D mode is an outlet mode in which conditioned air is blown toward the feet of the occupant and the inner surface of the front window of the vehicle. When the DEF switch 54 provided on the air conditioner operation panel 51 is pressed, the air conditioner is fixed to the DEF mode in which the conditioned air is blown toward the inner surface of the windshield.

Next, the target A / M of the driver side A / M door 15
M opening SW (Dr) (%) and A / M door 1 on the passenger seat side
The target A / M opening degree SW (Pa) (%) of No. 6 is calculated (step S8). In addition, such target A / M opening degree SW
(Dr) and the target A / M opening degree SW (Pa) are calculated as follows:
Target outlet temperatures TAO (Dr), T on the driver's seat side and the passenger's seat side
AO (Pa), a post-evaporation temperature sensor (TE) detected by the post-evaporation temperature sensor 74, a cooling water temperature (TW) detected by the cooling water temperature sensor 75, and the following numbers stored in the EEPROM 92 in advance. The calculation is performed based on the arithmetic expression of Expression 3 and the arithmetic expression of Expression 4.

[0051]

(Equation 3)

(Equation 4)

Next, in this embodiment, since the variable displacement compressor is used, in order to control the discharge capacity of the compressor, the target outlet temperature TAO ( Dr), TAO (Pa)
Then, the target post-evaporation temperature (TEO) is calculated based on the target post-evaporation temperature characteristic with respect to the target blowout temperature shown in the characteristic diagram previously stored in the EEPROM 92 (step S).
9).

Next, the feedback control (PI) is performed so that the target post-evaporation temperature (TEO) obtained in step S9 and the actual post-evaporation temperature (TE) detected by the post-evaporation temperature sensor 74 match. The control determines the target displacement of the compressor (step S10). In particular,
The solenoid current (control current: In), which is the target value of the control current supplied to the electromagnetic solenoid of the electromagnetic displacement control valve attached to the compressor, is calculated by the following equation (5) and equation (6).
Is calculated based on the calculation formula.

[0054]

(Equation 5)

(Equation 6)

Here, TE is the actual post-evaporation temperature which is the value detected by the post-evaporation temperature sensor 74, and TEO is the value in step S9.
In the target post-evaporation temperature obtained in the above, Kp is a proportional constant (for example, 0.03), and θ is a sampling time (for example, 1 second)
Where Ti is an integration constant (eg, 1000), En is the current temperature deviation (° C.), and En−1 is the previous temperature deviation (° C.).
Where In is the current control current (A) and In-1 is the previous control current (A).

Next, the determined blower control voltage VA (D
r), an output signal is sent to the blower driving circuit 8 so as to be VA (Pa). In addition, the power supply of the servo motors 28, 29 and 39 is controlled so as to be in the determined outlet mode. Further, the determined target A / M opening degree SW (Dr), SW
(Pa) so that the servomotors 17 and 18 are energized. Then, the determined solenoid current (control current: In) is output to the electromagnetic solenoid of the electromagnetic displacement control valve attached to the compressor (step S11). After that, the process returns to step S3.

Next, the air conditioner ECU 10, navigation ECU 100, engine ECU 200, instrument panel EC
Power saving control by each microcomputer of the U300 and the body ECU 400 will be described with reference to FIG. FIG. 8 is a flowchart showing power saving control by each microcomputer.

When there is a manual operation by the occupant or when the ignition switch is turned off (IG.OFF), a control program (routine of FIG. 8) stored in the EEPROM 92 in advance is executed. First, when the routine of FIG. 8 is started, it is determined whether or not it is necessary to store data such as manual operation information of the occupant or information necessary for control (step S20). This determination result is NO
In this case, the routine exits from the routine of FIG.

If the result of the determination in step S20 is YES
In other words, if you need to store the data,
It is determined whether or not the storage capacity of the storage unit that consumes the least power (for example, the HDD 101 of the navigation ECU 100) is free. That is, H which consumes the least power
It is determined whether the data can be stored in the DD 101 (step S21). If the result of this determination is YES, the data is stored in the HDD 101 that consumes the least power (step S22). Thereafter, the process exits the routine of FIG.

If the decision result in the step S21 is NO, it is decided whether or not the storage capacity of the storage means having the second lowest power consumption (for example, the EEPROM 302 of the instrument panel ECU 300) is free. That is, it is determined whether the data can be stored in the EEPROM 302 having the second lowest power consumption (step S23). If the result of this determination is YES, the data is stored in the EEPROM 302 that consumes the second lowest power (step S24). Thereafter, the process exits the routine of FIG.

If the decision result in the step S23 is NO, a decision is made as to whether or not the storage capacity of the storage means having the third lowest power consumption (for example, the EEPROM 402 of the body ECU 400) is free. That is, it is determined whether or not the data can be stored in the EEPROM 402 having the third lowest power consumption (step S25). If the result of this determination is YES, the data is stored in the EEPROM 402, which has the third lowest power consumption (Step S).
26). Thereafter, the process exits the routine of FIG.

If the decision result in the step S25 is NO, it is decided whether or not the storage capacity of the storage means (for example, the EEPROM 202 of the engine ECU 200) having the fourth lowest power consumption is free. That is, it is determined whether or not the data can be stored in the EEPROM 202 having the fourth lowest power consumption (step S27). If the determination result is YES, the data is stored in the EEPROM 202 that consumes the fourth lowest power (step S28). Thereafter, the process exits the routine of FIG.

If the decision result in the step S27 is NO, the data is stored in the EEPROM 92 of the air conditioner ECU 10 which consumes the fifth lowest power (step S29). Thereafter, the process exits the routine of FIG. As a result, the EEPROMs 92, 202, 302, 402 or the HDD 101 are used in the order of power consumption, and in any case, the combination with the lowest power consumption is selected.

Here, the manual operation information (data) of the occupant in the car navigation system means the occupant's input device when performing a “data search function”, a “route search function”, a “guidance (guidance) function” and the like. Input data when the switch is operated. The manual operation information (data) of the occupant in the engine control system is “two-wheel drive state”, “four-wheel drive state”, or “AU
A switching state of the traveling mode such as "TO" can be considered. The occupant manual operation information (data) in the body control system includes the adjustment state of the damping force of the electronically-controlled variable damper, or the door lock state, unlock state, child lock state, power seat slide adjustment state, The vertical adjustment state, the lifter adjustment state, the reclining adjustment state, the ON state and the OFF state of the seat heater, and the like can be considered.

The manual operation information (data) of the occupant in the automatic air-conditioning system includes the inside / outside air changeover switch 53 provided on the air-conditioning operation panel 51 and the DE.
F switch 54, rear defroster switch 55, DUA
At least one of an L switch 56, a MODE switch 57, a blower air volume switch 58, an A / C switch 59, an AUTO switch 60, an OFF switch 61, a driver side temperature setting switch 62 or a passenger side temperature setting switch 63 This means operation information in which the occupant (user) manually operates the above operation switches. That is, for example, "inside air circulation mode" or "outside air introduction mode" by operating the inside / outside air changeover switch 53, "FACE mode", "B / L mode", "F" by operating the MODE changeover switch 57
The occupant's manual operation information referred to as "OOT mode" or "F / D mode" can be considered.

[Effects of the Embodiment] As described above, in the vehicle information communication system of the present embodiment, when the ignition switch is turned off, that is, when the engine as the vehicle drive means is in the off state, each microcomputer is turned off. As a storage means or a storage medium for storing information necessary for control or manual operation information of an occupant, a non-volatile memory (EEPRO) which does not require a power supply for holding stored contents.
M92, 202, 302, 402) and storage media (H
DD101), the number of computers that require dark current can be reduced by using the nonvolatile memory and the storage medium of the entire vehicle information communication system. Power consumption can be reduced as compared with the case where the backup function is provided.

Thus, it is not necessary to provide a backup power supply for all the microcomputers mounted on the vehicle, and the number of microcomputers holding the stored contents by the backup power supply can be reduced. As a result, after the ignition switch is turned off, that is, the engine O
The power consumption after the FF can be suppressed, and the consumption of a backup power supply such as a vehicle-mounted power supply (battery) can be suppressed, so that the battery can be prevented from rising. Also,
There is no increase in cost due to the use of a high-cost power-saving IC or the like, and the design of the ECU is not complicated.

Here, in general, in a vehicle equipped with a car navigation system, a car audio system, or a digital clock, the stored contents are stored in a non-volatile memory (EEPROM) or a power supply which does not lose stored contents even when the power is turned off. Retained volatile memory (RAM) or storage medium (storage medium: HDD or DVD-RAM drive or DV
D-ROM drive). Therefore, by automatically retrieving them and preferentially using a non-volatile memory or a storage medium that does not require a power source as much as possible in a free storage means (memory) or a storage medium,
The number of computers requiring dark current can be reduced. As a result, the power consumption of the entire vehicle can be reduced as a whole.

[Other Embodiments] In the present embodiment, the occupant's manual operation information or information necessary for control (for example, a characteristic diagram, an arithmetic expression, a calculation expression, or display data) is stored in a storage means with low power consumption after the engine is turned off. Although the storage is performed in the order of the storage medium, the storage may be preferentially stored in the order of the storage means or the storage medium having high durability, the storage means or the storage medium having the high access speed, or a combination thereof. Thus, while the engine is off, the information that needs to be stored in each microcomputer can be stored in a durable storage means or storage medium, or a memory (non-volatile memory) or storage medium that does not require a power supply to hold the stored contents. By preferentially using the (storage medium), it is possible to provide a vehicle information communication system capable of reducing the number of microcomputers requiring dark current and suppressing power consumption after the ignition switch is turned off. As a storage medium with a high access speed, there is a double-speed CD-ROM drive. The storage medium is a floppy (registered trademark) disk, hard disk, magnetic tape, CD-ROM, CD-R, DV
There are storage media such as a D-ROM, a DVD-RAM, a magneto-optical disk (MO disk), and a flash memory.

In this embodiment, manual operation information or information necessary for control of one occupant is stored in one storage means or storage medium. By storing necessary information in a plurality of storage units or storage media, it is possible to avoid a problem that stored contents are lost in the event of a trouble. Further, when storage data such as manual operation information of the occupant or information necessary for control is stored, it may be stored in combination with a device code of an information transmission source. This makes it possible to clarify whether the information corresponds to the system component. For example, each information corresponding to a plurality of system components can be mixed in one storage unit or storage medium. Further, transmission and reception of stored data such as manual operation information of the occupant or information necessary for control may be performed by wire or wirelessly.

In this embodiment, in each microcomputer, the reading process of the stored data such as the manual operation information of the occupant or the information necessary for the control is performed when the ignition switch is turned on (IG.ON). When the vehicle approaches, when the user opens the door, or when the user sits on the seat, the stored data, such as the occupant's manual operation information or information necessary for control, is read out, so that an appropriate Other control processes can be performed. In addition, when electric power is used to store data such as information required for manual operation of the occupant or information required for control, when the voltage of the vehicle-mounted power supply falls to a predetermined value or less, the manual operation information or control for the occupant is used. The storage of necessary information may be stopped. Further, when a failure of the microcomputer or the internal device or the external device is determined, data such as manual operation information of the occupant or information necessary for control is transferred to a storage means of another computer or a storage medium of the internal device or the external device. You may do it.

The type of storage means or storage medium, storage capacity, read / write time, power consumption, or durability information may be transmitted and received by communication. Accordingly, it is not necessary to store such information in advance, and it is possible to easily cope with, for example, a case where a new storage unit or storage medium is added. Then, the reading process may be performed when the user approaches the vehicle, opens the door, or sits on the seat. Thus, by performing the reading process when the user approaches the vehicle, opens the door, or sits on the seat, before the user operates each system component,
Necessary information can be read out.

In the present embodiment, one ECU, which is an electronic circuit for system control, is provided with, for example, a CPU and an EEPROM.
One microcomputer, which includes functions such as M, RAM, and I / O ports, is built in. One ECU, which is an electronic circuit for system control, includes a CPU,
A plurality of microcomputers having functions such as an EEPROM, a RAM, and an I / O port may be built therein. Further, in the present embodiment, an example in which a variable displacement compressor having an electromagnetic variable displacement valve is used as the compressor has been described, but a compressor which is turned on / off by an electromagnetic clutch as a compressor or an electric motor driven by a motor is used. An expression compressor may be used. Further, both the FACE outlet and the FOOT outlet may be opened and closed by one outlet mode switching door. Further, the heater core 42
Instead, a condenser (heating heat exchanger) for a refrigeration cycle may be installed.

Here, each computer used in the vehicle system performs at least one of power train control, vehicle control, and body control. In addition, the power train control means control of the combustion injection device, carburetor, ignition magnetic control,
It refers to various engine controls such as idle speed control and knock control, and control of a power transmission system such as a transmission. The vehicle control refers to suspension control, steering control, brake control such as ABS, constant speed traveling control, and the like. In addition, body control refers to an automatic air conditioner, which enhances vehicle comfort, convenience and vehicle grade.
Electronic meter, multi-information by CRT, compass, light control, intermittent wiper, lamp disconnection detection, rear obstacle detection device, anti-theft, multiplex communication, door mirror, door lock, remote entry system, power window, power seat, seat belt And so on.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an overall configuration of a vehicle information communication system (embodiment).

FIG. 2 is a schematic diagram showing an entire configuration of an automatic air conditioner system (embodiment).

FIG. 3 is a front view showing an instrument panel of the vehicle (embodiment).

FIG. 4 is a front view showing an air conditioner operation panel (embodiment).

FIG. 5 is a flowchart illustrating an example of a control program of a microcomputer of the air conditioner ECU (embodiment).

FIG. 6 is a characteristic diagram showing a blower control voltage characteristic with respect to a target blowing temperature (embodiment).

FIG. 7 is a characteristic diagram showing an outlet mode control characteristic with respect to a target outlet temperature (embodiment).

FIG. 8 is a flowchart showing power saving control by each microcomputer (embodiment).

[Explanation of symbols]

Reference Signs List 1 air conditioning unit 10 air conditioner ECU (electronic circuit for control system) 100 navigation ECU (electronic circuit for control system) 101 HDD (storage medium) 200 engine ECU (electronic circuit for control system) 202 EEPROM (storage means) 300 instrument panel ECU (electronic circuit for control system) 302 EEPROM (storage means) 400 Body ECU (electronic circuit for control system) 402 EEPROM (storage means)

Claims (13)

[Claims] 1. A vehicle system having at least a storage means and a plurality of computers for electronically controlling each system component in accordance with occupant operation information or contents stored in said storage means. A vehicle system, wherein at least one computer preferentially stores occupant operation information or information necessary for control in the storage unit having a predetermined high priority. 2. A vehicle system having at least a storage medium and a plurality of devices for operating each system component according to occupant operation information or storage contents of the storage medium, wherein: A vehicle system, wherein at least one device preferentially stores occupant operation information or information necessary for control in the storage medium having a predetermined high priority. 3. A computer having at least storage means for electronically controlling each system component in accordance with occupant operation information or the contents stored in the storage means, and at least a storage medium, wherein the occupant operation information or A vehicle system including one or more devices that operate system components according to the storage content of a storage medium, wherein at least one of the plurality of computers or the one or more devices is an occupant; A vehicle system characterized by storing operation information or information necessary for control in the storage means or the storage medium having high durability. 4. A plurality of computers having at least storage means for electronically controlling each system component in accordance with occupant operation information or contents stored in said storage means, and at least a storage medium, occupant operation information Alternatively, in a vehicle system including one or more devices that operate system components according to the storage content of the storage medium, at least one computer or device among the plurality of computers or the one or more devices is A vehicle system that preferentially stores occupant operation information or information necessary for control in the storage unit or the storage medium that consumes little or no power. 5. A computer having at least storage means for electronically controlling each system component in accordance with occupant operation information or the contents stored in said storage means, and at least a storage medium, wherein the occupant operation information is provided. Alternatively, in a vehicle system including one or more devices that operate system components according to the storage content of the storage medium, at least one computer or device among the plurality of computers or the one or more devices is A vehicle system for storing the operation information of the occupant or the information necessary for control preferentially in the storage means or the storage medium capable of reading or writing at high speed. 6. The vehicle system according to claim 1, wherein important information is stored in at least two of the storage means of the computer or the storage medium of the device having high priority. Characteristic vehicle system. 7. The vehicle system according to claim 1, wherein at least one of the plurality of computers or the one or more devices includes the storage unit or the storage device. A vehicle system for transmitting and receiving information on the type of storage medium, storage capacity, read / write time, power consumption, or durability by communication. 8. The vehicle system according to claim 1, wherein the storage means or the storage medium stores information in combination with a device code of an information transmission source when storing the information. Characteristic vehicle system. 9. The vehicle system according to claim 1, wherein at least one of said plurality of computers or said one or more devices operates a vehicle driving means. A vehicle system for storing, after a stop, operation information of the occupant or information necessary for control. 10. The vehicle system according to claim 1, wherein at least one of the plurality of computers or the one or more devices is such that a user approaches a vehicle. A vehicle system for performing a reading process when the vehicle is opened, when the door is opened, or when the vehicle is seated. 11. The vehicle system according to claim 1, wherein at least one of the plurality of computers or the one or more devices includes operation information of the occupant. Or, when electric power is used to store information required for control, when the voltage of the vehicle-mounted power supply falls below a predetermined value, stopping the storage of the occupant's operation information or information necessary for control may be stopped. Characteristic vehicle system. 12. The vehicle system according to claim 1, wherein at least one of the plurality of computers or the one or more devices includes operation information of the occupant. Alternatively, a vehicle system wirelessly transmits and receives information necessary for control. 13. The vehicle system according to claim 1, wherein at least one of the plurality of computers or the one or more devices is the computer or the device. A vehicle system for transmitting the operation information or information necessary for control of the occupant to a storage means of another computer or a storage medium of another device when the failure is determined.