A small presentation which would help you to explain nitrous system. Mostly suitable for college presentations

1. NOS SYSTEM IN
AUTOMOBILES
Ashwin Kumar G V
13ME180

2. Contents
 Introduction
 What happens on burning N2O?
 Mechanism
 Types of nitrous systems
 The NOS kit
 Reliability Concerns
 Street legality

3. Introduction
 A nitrous oxide engine is an engine in which the oxygen required for burning
the fuel stems from the decomposition of nitrous oxide (N2O) rather than air.
 The system increases the internal combustion engine's power output by
allowing fuel to be burned at a higher-than-normal rate, because of the
higher partial pressure of oxygen injected into the fuel mixture.
 In the context of racing, nitrous oxide is often termed nitrous or NOS. The
term NOS is derived from the initials of the company name Nitrous Oxide
Systems, one of the pioneering companies in the development of nitrous
oxide injection systems for automotive performance use

4. What happens on burning N2O?
 When a mole of nitrous oxide decomposes, it releases half a mole of
O2 molecules (oxygen gas), and one mole of N2 molecules (nitrogen gas).
This decomposition allows an oxygen concentration of 33% to be
reached. Nitrogen gas is non-combustible and does not support
combustion. Air—which contains only 21% oxygen, the rest being
nitrogen and other equally non-combustible and non-combustion-
supporting gasses—permits a 12-percent-lower maximum-oxygen level
than that of nitrous oxide. This oxygen supports combustion; it alone
combines with gasoline, alcohol, or diesel fuel to produce carbon
dioxide and water vapour, along with heat, which causes the former two
products of combustion to expand and exert pressure on pistons, driving
the engine.

5. Mechanism
 N2O injected
 N2O changes state to gas
 -88.33330C
 Cools intake charge, allowing for
more air/fuel mixture.
 As the cylinder heats from
compression/combustion, O breaks
away from N2O
 Oxygen combusts with additional
fuel and a greater force, pushes
down the piston, increasing power.

6. Types
 Dry - extra fuel required is introduced through the fuel injectors, keeping the
manifold dry of fuel
 Wet Single-port - introduces the fuel and nitrous together, causing the upper
intake manifold to become wet with fuel
 Wet Direct-port - introduces nitrous and fuel directly into each intake port on
the engine

7. The Nitrous Kit

8. Reliability Concerns
 The engine as a whole is placed under greater stress,
especially the parts involved with the combustion
chamber. An engine with components not able to cope
with the increased stress imposed by the use of nitrous
systems can experience major engine damage
 An engine running with NOS depends heavily on the
proper air to fuel ratio to prevent detonation from
occurring
 Backfiring, Can be prevented by properly designed
nitrous injector and correct placement of nozzles

9. Street Legality
 Nitrous oxide injection systems for automobiles are illegal for road use in
some countries
 In Great Britain, there are no restrictions on use of N2O, but the modification
does have to be declared to the insurance company, which will undoubtedly
require a higher premium for Motor Vehicle insurance or could refuse to
insure
 In Germany, despite its strict TÜV rules, a nitrous system could be installed
and used legally in a street driven car
 Since the car still has to meet its emission standards, which depend on the
car's year of construction, it is easier for older cars.