2013 Acura MDX air condition

The burning of gasoline in your
vehicle's engine produces several
byproducts. Some of these are
carbon monoxide (CO), oxides of
nitrogen (NOx), and hydrocarbons
(HC). Gasoline evaporating from the
tank also produces hydrocarbons.
Controlling the production of NOx,
CO, and HC is important to the
environment. Under certain
conditions of sunlight and climate,
NOx and HC react to form
photochemical‘‘smog.’’Carbon
monoxide does not contribute to
smog creation, but it is a poisonous
gas.The Clean Air Act
The United States Clean Air Act
ᤳ
sets standards for automobile
emissions. It also requires that
automobile manufacturers explain to
owners how their emissions controls
work and what to do to maintain
them. This section summarizes how
the emissions controls work.
Scheduled maintenance is on page
514.ᤳIn Canada, Acura vehicles comply
with the Canadian emission
requirements, as specified in an
agreement with Environment
Canada, at the time they are
manufactured.Crankcase Emissions Control
System
Your vehicle has a positive crankcase
ventilation system. This keeps
gasses that build up in the engine's
crankcase from going into the
atmosphere. The positive crankcase
ventilation valve routes them from
the crankcase back to the intake
manifold. They are then drawn into
the engine and burned.
Evaporative Emissions Control
System
As gasoline evaporates in the fuel
tank, an evaporative emissions
control canister filled with charcoal
adsorbs the vapor. It is stored in this
canister while the engine is off. After
the engine is started and warmed up,
the vapor is drawn into the engine
and burned during driving.
CONTINUED
Emissions Controls
587
Technical Information
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Onboard Refueling Vapor
Recovery
The onboard refueling vapor
recovery (ORVR) system captures
the fuel vapors during refueling. The
vapors are adsorbed in a canister
filled with activated carbon. While
driving, the fuel vapors are drawn
into the engine and burned off.
Exhaust Emissions Controls
The exhaust emissions controls
include four systems: PGM-FI,
ignition timing control, exhaust gas
recirculation, and three way catalytic
converter. These four systems work
together to control the engine's
combustion and minimize the
amount of HC, CO, and NOx that
come out the tailpipe. The exhaust
emissions control systems are
separate from the crankcase and
evaporative emissions control
systems.
PGM-FI SystemThe PGM-FI system uses sequential
multiport fuel injection. It has three
subsystems: air intake, engine
control, and fuel control. The
powertrain control module (PCM)
uses various sensors to determine
how much air is going into the
engine. It then controls how much
fuel to inject under all operating
conditions.Ignition Timing Control SystemThis system constantly adjusts the
ignition timing, reducing the amount
of HC, CO, and NOx produced.Exhaust Gas Recirculation (EGR)
SystemThe exhaust gas recirculation (EGR)
system takes some of the exhaust
gas and routes it back into the intake
manifold. Adding exhaust gas to the
air/fuel mixture reduces the amount
of NOx produced when the fuel is
burned.
Three Way Catalytic ConverterThe three way catalytic converter is
in the exhaust system. Through
chemical reactions, it converts HC,
CO, and NOx in the engine's exhaust
to carbon dioxide (CO
2), nitrogen
(N
2), and water vapor.
Replacement Parts
The emissions control systems are
designed and certified to work
together in reducing emissions to
levels that comply with the Clean Air
Act. To make sure the emissions
remain low, you should use only new
Acura replacement parts or their
equivalent for repairs. Using lower
quality parts may increase the
emissions from your vehicle.
The emissions control systems are
covered by warranties separate from
the rest of your vehicle. Read your
warranty manual for more
information.
Emissions Controls58812/07/17 18:10:57 13 ACURA MDX MMC North America Owner's M 50 31STX660 enu

A
Accessories and
Modifications
..........................
431
ACCESSORY (Ignition Key
Position)
.................................
139
Accessory Power Sockets
..........
177
AC Power Outlet
........................
178
Active Damper System
...............
484
Active Head Restraints
...............
152
AcuraLink
®(U.S. models
only)
.......................................
402
Adaptive Cruise Control
(ACC)
.....................................
348
Additives, Engine Oil
.................
518
Adjusting the Steering Wheel
....
134
Advanced Airbags
........................
31
Airbag (SRS)
..........................
10, 27
Air Conditioning System
............
182
Rear A/C Control
....................
187
Air Outlets (Vents)
.....................
189
Air Pressure, Tires
..............
540, 541
Alcohol in Gasoline
....................
422
Antifreeze
...................................
520Anti-lock Brakes (ABS)
Indicator
............................
70, 462
Operation
................................
461
Anti-theft, Audio System
.............
308
Anti-theft Steering Column
Lock
.......................................
139
Audio System
......................
192, 212
Automatic Climate Control.........
183
Automatic Lighting Off
Feature
...................................
131
Automatic Seat Belt Tensioners...
23
Automatic Speed Control
...........
345
Automatic Transmission
............
443
Capacity, Fluid
........................
578
Checking Fluid Level
..............
523
Driving with the Paddle
Shifters
................................
447
Shifting
...................................
444
Shift Lever Position
Indicators
............................
443
Shift Lever Positions
...............
444
Shift Lock Release
...................
446
Auxiliary Input Jack
...................
307B
Battery
Charging System
Indicator
........................
69, 562
Jump Starting
..........................
558
Maintenance
...........................
547
Specifications
..........................
579
Before Driving
...........................
421
Belts, Seat
................................
9, 21
Beverage Holders
......................
174
Blind Spot Information System
(BSI)
......................................
476
Bluetooth
®Audio
.......................
298
Bluetooth
®HandsFreeLink
®
(Models with navigation
system)
...............................
383
Bluetooth
®HandsFreeLink
®
(Models without navigation
system)
...............................
365
Booster Seats
...............................
58
CONTINUED
Index
I
INDEX
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