Nissan Rogue. Instruction — part 747
HAC-10
< SYSTEM DESCRIPTION >
[AUTOMATIC AIR CONDITIONING]
SYSTEM
SYSTEM
System Description
INFOID:0000000011276566
SYSTEM DIAGRAM
SYSTEM DESCRIPTION
• Automatic air conditioning system is controlled by each function of A/C auto amp., ECM, IPDM E/R and
BCM.
Control by A/C auto amp.
-
-
-
ALIIA0900GB
SYSTEM
HAC-11
< SYSTEM DESCRIPTION >
[AUTOMATIC AIR CONDITIONING]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
-
-
-
- Correction for input value of each sensor
Ambient sensor (setting temperature correction)
• A/C auto amp. controls passenger room temperature so that the optimum level always matches the temper-
ature level that the passenger may feel. Correction is applied to the target temperature that is set using tem-
perature control dial, according to ambient temperature detected by ambient sensor.
In-vehicle sensor [in-vehicle temperature correction]
• Passenger room temperature detected by in-vehicle sensor is corrected for each front air conditioning con-
trol (driver side and passenger side).
Intake sensor (intake temperature correction)
• A/C auto amp. performs correction to change recognition intake temperature of A/C auto amp. quickly when
difference is large between recognition intake temperature and intake temperature detected by intake tem-
perature sensor. The correction is performed to change recognition intake temperature slowly when differ-
ence is small.
Sunload sensor (sunload amount correction)
• Sunload amount detected by sunload sensor is corrected for each air conditioning control.
• A/C auto amp. performs correction to change recognition sunload amount of A/C auto amp. slowly when
sunload amount changes quickly, for example when entering or exiting a tunnel.
Set temperature correction
• A/C auto amp. performs correction to the target temperature set by the temperature control switch so as to
match the temperature felt by the passengers depending on the ambient temperature detected by the ambi-
ent sensor, and controls it so the in-vehicle temperature is always the most suitable.
Control by ECM
- Cooling fan control
PCS-7, "RELAY CONTROL SYSTEM : System Description"
- Air conditioning cut control
EC-47, "AIR CONDITIONING CUT CONTROL : System Description"
.
Control by IPDM E/R
- Relay control
PCS-7, "RELAY CONTROL SYSTEM : System Description"
- Cooling fan control
PCS-7, "RELAY CONTROL SYSTEM : System Description"
Control by BCM
- Relay control
Refer to
BCS-8, "BODY CONTROL SYSTEM : System Description"
(with Intelligent Key system) or
"BODY CONTROL SYSTEM : System Description"
(without Intelligent Key system).
Air Flow Control
INFOID:0000000011276567
DESCRIPTION
• A/C auto amp. changes duty ratio of blower motor drive signal and controls air flow continuously. When air
flow is increased, duty ratio of blower motor control signal gradually increases to prevent a sudden increase
in air flow.
• In addition to instruction control and automatic control, air flow control consists of starting fan speed control, low
coolant temperature starting control, high in-vehicle temperature starting control and fan speed control at
door motor operation
AUTOMATIC AIR FLOW CONTROL
• A/C auto amp. decides target air flow depending on target air mix door opening angle.
• A/C auto amp. changes duty ratio of blower motor control signal and controls the air flow continuously so
that air flow matches the target air flow.
HAC-12
< SYSTEM DESCRIPTION >
[AUTOMATIC AIR CONDITIONING]
SYSTEM
• When air outlet is VENT or B/L, the minimum air flow is changed
depending on sunload.
STARTING AIR FLOW CONTROL
• When blower motor is activated, A/C auto amp. gradually
increases duty ratio of blower motor control signal to prevent a
sudden increase in discharge air flow.
• It takes approximately 8 seconds for air flow to reach HI from LOW.
LOW COOLANT TEMPERATURE STARTING CONTROL
If the engine coolant temperature is 56
°C (133°F) or less, to prevent
a cold discharged air flow, A/C auto amp. suspends blower motor
activation for a maximum of 150 seconds depending on target air
mix door opening angle. After this, blower motor control signal is
increased gradually, and blower motor is activated.
HIGH IN-VEHICLE TEMPERATURE STARTING CONTROL
When front evaporator fin temperature is high [intake sensor value is 35
°C (95°F) or more], to prevent a hot
discharged air flow, A/C auto amp. suspends blower motor activation for approximately 3 seconds so that front
evaporator is cooled by refrigerant.
FAN SPEED CONTROL AT DOOR MOTOR OPERATION
When mode door motor is activated while air flow is more than the specified value, A/C auto amp. reduces fan
speed temporarily so that mode door moves smoothly.
Air Inlet Control
INFOID:0000000011276568
The intake door is automatically controlled by the temperature set-
ting, ambient temperature, in-vehicle temperature, intake tempera-
ture, amount of sunload and ON/OFF operation of the compressor.
Intake door automatic control selects FRE, 20% FRE, or REC
depending on a target air mix door opening angle, based on in-vehi-
cle temperature, ambient temperature, and sunload.
JMIIA1129GB
JMIIA1130GB
JMIIA1227GB
JMIIA0711GB
SYSTEM
HAC-13
< SYSTEM DESCRIPTION >
[AUTOMATIC AIR CONDITIONING]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
Air Outlet Control
INFOID:0000000011276569
• While air outlet is in automatic control, A/C auto amp. selects the
mode door position depending on a target air mix door angle and
outlet air temperature calculated from sunload.
• If ambient temperature is excessively low, D/F is selected to pre-
vent windshield fogging when air outlet is set to FOOT.
Compressor Control
INFOID:0000000011276570
DESCRIPTION
• When the compressor activation condition is satisfied while blower motor is activated, A/C auto amp. trans-
mits A/C ON signal and blower fan ON signal to BCM.
• BCM transmits the A/C ON signal and blower fan ON signal to the ECM via CAN communication line.
• ECM judges that the compressor can be activated depending on the state of each sensor (refrigerant pres-
sure sensor signal and others) and transmits A/C compressor request signal to IPDM E/R via CAN commu-
nication.
• IPDM E/R turns A/C relay ON and activates the compressor depending on request from ECM.
COMPRESSOR PROTECTION CONTROL AT PRESSURE MALFUNCTION
When high-pressure side value that is detected by refrigerant pressure sensor is as per the following state,
ECM requests IPDM E/R to turn A/C relay OFF and stops the compressor.
• 3.12 MPa (31.82 kg/cm
2
, 452.4 psi) or more (When the engine speed is less than 1,500 rpm)
• 2.74 MPa (27.95 kg/cm
2
, 397.3 psi) or more (When the engine speed is 1,500 rpm or more)
• 0.14 MPa (1.43 kg/cm
2
, 20.3 psi) or less
COMPRESSOR OIL CIRCULATION CONTROL
When the engine starts while the engine coolant temperature is 56
°C (133°F) or less, ECM activates the com-
pressor for approximately 6 seconds and circulates the compressor lubricant once.
LOW TEMPERATURE PROTECTION CONTROL
• When intake sensor detects that front evaporator fin temperature is
2
°C (36°F) or less, A/C auto amp. requests ECM to turn compres-
sor OFF, and stops the compressor.
• When the front evaporator fin temperature returns to 3.5
°C (38°F)
or more, the compressor is activated.
AIR CONDITIONING CUT CONTROL
When set engine is running is excessively high load condition, ECM requests IPDM E/R to turn A/C relay OFF,
and stops the compressor. Refer to
EC-47, "AIR CONDITIONING CUT CONTROL : System Description"
Door Control
INFOID:0000000011276571
AIR MIX DOOR MOTOR (DRIVER SIDE)
DESCRIPTION
• The step motor system is adopted for air mix door motor (driver side).
• When a drive signal is input from A/C auto amp. to door motor, a step motor built into the door motor rotates
according to the drive signal, and then stops at the target door position.
JMIIA0710GB
JMIIA1055GB
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст