A central tire inflation system (CTIS) is a system to provide control over the air pressure in each tire of a vehicle as a way to improve performance on different surfaces. For example, lowering the air pressure in a tire creates a larger area of contact between the tire and the ground and makes driving on softer ground much easier. It also does less damage to the surface. This is important on work sites and in agricultural fields. By giving the driver direct control over the air pressure in each tire, maneuverability is greatly improved.

1. By:By:
PIYUSH PRIYADARSHIPIYUSH PRIYADARSHI
MECHANICALMECHANICAL
44THTH
YEARYEAR
SELF INFLATING TIRES

2. INTRODUCTION

3. What Is It…
 The Self inflating tires is designed to inflate or deflate tires
automatically.
 Tires need more air while driving on hard surfaces at high speeds
and less air for driving on soft surfaces such as soil or sand.
The driver of the vehicle will select an appropriate tire pressure from
inside the vehicle
MEANINGS :
 INFLATE : To fill (something) with air or gas so as to make it swell.
 DEFLATE : To release contained air or gas from

4. INFLATING TYRES
Tires-inflation systems Job:
 Detect when the air pressure in a particular tire has dropped.
 Notify the driver of the problem.
Inflate that tire back to the proper level.

5. Types Of Self Inflating Tires System
CTIS (Central Tire Inflation System )
TMS (Tire Maintenance System )
MTIS( Meritor Tire Inflation System)

6. COMMON ELEMENTS OF INFLATION SYSTEMS:
They use valve to isolate individual tires to prevent airflow.
 They have a method for sensing the tire pressures.
 They have an air source.
 There's a way to get the air from the air source to the tires.
There's a pressure relief vent to vent air from the tire.

7. CTIS an inside look:

8.  A wheel valve is present which isolate the tire from the system when it's not
in use.
 An electronic control unit (ECU), the brain of the system is mounted behind
the passenger seat.
 An operator control panel let customize tire pressure model.
 CTIS includes a speed sensor provide information about current speed & in
turn CTIS maintain the optimum tire pressure.
 CTIS gives priority to the Brakes since the brakes & the tire share air from
the same compressor.
CTIS’s Primary functions:

9. CTIS a closer look (At the wheel):

10. Tire Maintenance System (TMS):
 The Rotary Joint.
 The Manifold.
TMS’s primary components :
It also has a electronic control unit that runs the entire
system.

11. Wheel-end assembly:

12. Controls:

13. Air enters into the tires

14. Future of Self Inflating Tires:
 TIPM (Tire Intelligent Pressure
Management)
 Entire system
 Cycloid Air Pump system.

15. Disadvantages
Too many components
More costly than the conventional tires.
Requires more maintenance.
Heavier than general vehicle.
The user must have the basic know how of the relation between
the pressure and road condition.

16. Conclusion
Self inflating tires are going to be used in the
bicycles and motorcycles along with the four or
more wheelers through out the world and an era
will definitely come soon when there will be
only self inflating tires in practice.

17. THANK YOU