Lexus NX: System Description

Neural Network Control

This control is capable of performing complex control by artificially simulating the information processing method of the nervous system of living organisms in order to establish a complex input/output relationship similar to that of a human brain.

Outlet Air Temperature Control

Based on the temperature set by the temperature control dial, neural network control calculates outlet air temperature based on input signals from various sensors.

Dual Control

The temperature settings for the driver and front passenger are controlled independently in order to provide separate vehicle interior temperatures for the right and left sides of the vehicle.

Thus, the air conditioning accommodates the occupants' preferences.

Blower Control

Controls the blower motor in accordance with the airflow volume that has been calculated by neural network control based on the input signals from various sensors.

Air Outlet Control

Automatically switches the air outlets in accordance with the outlet mode that has been calculated by neural network control.

In accordance with the engine coolant temperature, ambient air temperature, amount of sunlight, required blower, outlet temperature and vehicle speed conditions, this control automatically switches the blower outlet to foot and defroster mode to prevent the windows from becoming fogged up when the ambient air temperature is low.

Air Inlet Control

Automatically controls the air inlet control damper to help achieve the calculated outlet air temperature that is required.

Drives the air inlet control servo motor according to the operation of the air inlet control switch and moves the dampers to the fresh or recirculation position.

Electric Inverter Compressor Control

Through the calculation of the target evaporator temperature based on various sensor signals, the air conditioning amplifier optimally controls discharge capacity by regulating the opening extent of the compressor solenoid valve.

The air conditioning amplifier assembly calculates the target speed of the compressor based on the target evaporator temperature (which is calculated by the cooler (room temperature sensor) thermistor, thermistor assembly, automatic light control sensor) and the actual evaporator temperature that is detected by the No. 1 cooler thermistor in order to control the compressor speed.

The air conditioning amplifier assembly calculates the target evaporator temperature, which includes corrections based on the cooler (room temperature sensor) thermistor, thermistor assembly, the automatic light control sensor, and No. 1 cooler thermistor. Accordingly, the air conditioning amplifier assembly controls the compressor speed to an extent that would not inhibit the proper cooling performance or defogging performance.

Turns the air conditioning on automatically when the AUTO button is pressed when the air conditioning is off.

Decreases the compressor speed in order to ensure quietness when the vehicle is stopped or the engine is off.

Defroster Control

Defroster control logic is used to improve defroster performance.

PTC Heater Control

When the hybrid control system is operating (READY), and the blower motor with fan sub-assembly is turned on, the air conditioning amplifier assembly turns on the quick heater assembly if the conditions listed below are met.

ECO Mode Control

When the integration control and panel assembly (ECO mode switch) is turned on, the air conditioning amplifier assembly limits the air conditioning system performance.

Diagnosis

A Diagnostic Trouble Code (DTC) is stored in memory when the air conditioning amplifier detects a problem with the air conditioning system.

Air Inlet Control Door

FRESH

B

Brings in fresh air.

RECIRCULATION

A

Recirculates internal air.

Air Mix Control Door

HI - LO

C1 - C2

Varies the driver side mixture ratio of the hot air and the cool air in order to regulate the temperature continuously from HI to LO.

D1 - D2

Varies the front passenger side mixture ratio of the hot air and the cool air in order to regulate the temperature continuously from HI to LO.

Mode Control Door (for All Seat Control Mode)

FACE

E, I, K, M

Air blows out of the front center register, side register and console rear face register.

BI-LEVEL

E', H, K', M

Air blows out of the front center register, side register, console rear face register and front and rear footwell register ducts.

FOOT

F, G, L, N

Air blows out of the front footwell register, rear footwell register and front register ducts. In addition, air blows out slightly from the front defroster, side defroster and console rear face register.

FOOT/DEF

F, H, L, N

Defrosts the windshield through the front defroster. At the same time, air is blown out from the footwell register and rear footwell register. A small amount of air also blows out from the side register and console rear face register.

DEF

F, I, J, N

Defrosts the windshield through the front defroster and side defroster. A small amount of air also blows out from the side register.

Mode Control Door (for Front Seat Control Mode)

FACE

E, I, J, M

Air blows out of the front center register and side register.

BI-LEVEL

E', H, J, M

Air blows out of the front center register, side register and front footwell register ducts.

FOOT

F, G, J, N

Air blows out of the front footwell register and front side register ducts. In addition, air blows out slightly from the front defroster and side defroster.

FOOT/DEF

F, H, J, N

Defrosts the windshield through the front defroster. At the same time, air is blown out from the front footwell register. A small amount of air also blows out from the side register.

Mode

A

B

C

D

E

F

Center Register

Side Register

Footwell Register

Defroster

Console Box Register

Rear Heater Duct

FACE

-

-

-

BI－LEVEL

-

FOOT

-

FOOT/DEF

-

DEF

-

-

-

-

Mode

A

B

C

D

E

F

Center Register

Side Register

Footwell Register

Defroster

Console Box Register

Rear Heater Duct

FACE

-

-

-

-

BI－LEVEL

-

-

-

FOOT

-

-

-

FOOT/DEF

-

-

-

4°C (39.2°F) or less

Set temperature when power switch turned off*1, *2

ON

Between 5°C (41°F) and 29°C (84.2°F)

Set temperature when power switch turned off*1

OFF

30°C (86°F) or more

Set temperature when power switch turned off*1, *2

OFF