TYRES

1. 1
1
1
TECHNICAL SEMINAR 2022-2023
An Autonomous Institution
Affiliated to VTU, Belagavi,
Approved by AICTE, New Delhi,
Recognised by UGC with 2(f) & 12 ( B)
Accredited by NBA & NAAC
NAME: CHANDAN P
USN: 1MJ19ME005
STUDENT USN :
SEMINAR GUIDE:
Asst. Prof. KRISHNA PRASAD R
“SELF INFLATING TYRES ”

2. • INTRODUCTION
• WHAT IS AN SIT
• OBJECTIVES
• WHY SUCH SYSTEM
• USES
• WHAT DOES IT DO
• ELEMENTS OF SIT
• WORKING IN SIT
• TYPES OF SIT
• LITERATURE REVIEW
• ALGORITHM
• ADVANTAGES
• DISADVANTAGES
• APPLICATIONS
• CONCLUSION
• FUTURE SCOPE
• REFERENCES
Contents
2

3.  Self-inflating tires allow a vehicle to adjust to the current terrain for ideal performance and
safety in those conditions.
 Self-inflating tires are designed to constantly maintain tire pressure at the proper level.
 Self-inflating systems are designed more for slow leaks and for optimizing performance and
safety.
 Self-inflation systems helps in re-inflation of tires to proper level
 One of the reasons for Road Accident to occur is less or Insufficient Tire Pressure.
INTRODUCTION
3

4. What is an Self Inflating Tyres?
 SIT uses the energy of the wheel to self-inflate the tire as needed, keeping the tire always at its
optimum pressure level.
 The system integrates a peristaltic tube chamber into the tire wall.
 The chamber is kept closed at its lowest point by normal tire deformation caused by the vehicles
weight.
 Self-inflation systems helps in re-inflation of tires to proper level

5. OBJECTIVES
 To restore the tyre pressure on vehicles so that they are kept at optimum pressure levels
 Constantly maintain tire pressure at the proper level
 Designed more for slow leaks
 Optimizing performance
 Safety

6. Why such system?
 Allow a vehicle to adjust to the current terrain for ideal performance and safety in those conditions
 Lots of consumer vehicles are equipped with pressure-monitoring systems, but there's no way for
the driver to do anything about it without an external air source.
 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

7. USES
 Used to prevent accident
 Used for entertaining such as it telling jokes and asking question
 Establishes interface with other drivers very easily
 Open and close the window of the car automatically and also answer a call for u.
 If a driver gets a heart attack or he is drunk it will send signals to vehicles nearby about this so driver
becomes alert

8. What does it do
 SIT uses the energy of the wheel to self-inflate the tire as needed, keeping the tire always at its
optimum pressure level
 The system integrates a peristaltic tube chamber into the tire wall
The chamber is kept closed at its lowest point by normal tire deformation caused by the vehicles
weights

9. Elements of Self Inflating Tyres
 Valve to isolate individual tires
 Sensors for sensing the tire pressures
 Air source which is usually an existing onboard source
 Getting the air from the air source to the tires, which is usually through the axle
Systems either use a sealed-hub axle with a hose from the hub to the tire valve or else they
run tubes through the axle with the axle .
 A pressure relief vent to vent air from the tire without risking damage to the hub or rear-
axle seals

11. 1. Semi Tire Inflation System (STIS)
2. The Central Tire Inflation System (CTIS)
3. Tire Maintenance System and AIRGO

12. 1. A wheel valve
2. Electronic control unit
3. Pneumatic control unit
4. Operator control panel
5. Speed sensor
6. Pressure switch

13.  The idea behind the CTIS is to provide control over the air pressure in
each tire as a way to improve performance on different surfaces.
 By giving the driver direct control over the air pressure in each tire,
maneuverability is greatly improved.
 Another function of the CTIS is to maintain pressure in the tires if there
is a slow leak or puncture. In this case, the system controls inflation
automatically based on the selected pressure the driver has set.

15. • The TMS typically consists of a pressure sensor mounted on the wheel
that measures the tire pressure and sends the data to a control module.
The control module then analyzes the data and sends a signal to an air
compressor or an air release valve, which either adds or releases air from
the tire to maintain the desired pressure.
• In a self-inflating tire, the TMS works by constantly monitoring the tire
pressure and adjusting it as needed to maintain optimal performance and
safety. For example, if the tire pressure is too low, the TMS will
automatically inflate the tire to the correct pressure, and if the pressure
is too high, it will release air to bring it back to the correct level.

16. • The overall system is made up of a wheel-end
assembly and a control module
 Air tank
 Pressure Protection Valve
 Shut-off valve
 Filter
 Control Box
 Air-supply line
.

17. • .
 When a tire loses pressure, due to a
puncture or other seepage, a series of
check valves automatically detects it.
 The System then immediately draws air
from the vehicle’s pneumatic system and
directs it to each tire requiring air.
 The air pressure is delivered via the
trailer’s hollow axle housing.
 The air then goes through the hub
assembly and into the tires. It is
completely isolated from the brake
system

18. LITERATURE REVIEW
• "Self-Inflating Tyres: A Step Forward in Automobile Industry" by V. Venkatesan and M. Anbarasu
(2018)
• This article provides an overview of self-inflating tires and their potential benefits, including
improved fuel efficiency, reduced tire wear, and increased safety. The authors discuss the various
technologies used in self-inflating tires, such as pressure sensors, compressors, and release valves,
and highlight some of the challenges that need to be overcome to make self-inflating tires more
widely available.
• "Self-inflating Tyres – Advancements and Challenges" by M. Arun and R. Chandra Bose (2019)
• This paper provides a detailed review of the different types of self-inflating tire technologies,
including mechanical, electrical, and chemical systems. The authors compare the advantages and
disadvantages of each system and discuss the challenges associated with implementing self-
inflating tires on a large scale, such as cost, reliability, and compatibility with existing vehicles.

19. LITERATURE REVIEW
• "Self-Inflating Tire System Based on Energy Harvesting" by W. Li, Y. Li, and X. Du (2020)
• This study proposes a new self-inflating tire system that uses energy harvesting technology
to power the tire's compressor. The system includes a piezoelectric energy harvester that
converts the tire's vibrations into electrical energy. The authors demonstrate the feasibility
of the system through simulation and testing.
• "Investigation of Self-Inflating Tyres and their Potential Impact on Tyre Rolling Resistance
and Vehicle Fuel Economy" by A. Sathyanarayana and P. Sasikumar (2021)
• This research study investigates the potential impact of self-inflating tires on vehicle fuel
economy and tire rolling resistance. The authors conducted experiments on a test vehicle
equipped with self-inflating tires and compared the results to those of a conventional tire.

20. Algorithm
• The tire pressure sensor detects the current pressure level in the tire.
• The pressure sensor sends this information to the control unit of the self-inflating system.
• The control unit uses algorithms to determine the appropriate inflation level based on factors such
as the load on the tire, the speed of the vehicle, and the temperature.
• The control unit then activates the compressor, which pumps air into the tire to reach the desired
pressure level.
• Once the tire has reached the desired pressure level, the control unit deactivates the compressor.
• The pressure sensor continues to monitor the tire pressure, and the control unit adjusts the
inflation level as needed to maintain optimal pressure levels

21. Advantages
• Safety
• Fuel efficiency, Correct tire pressure leads to lower rolling resistance, significantly improving fuel
efficiency
• Tire longevity
• Environmental friendliness
• Convenience.
Disadvantages
• Costlier than the conventional tires.
• Requires more maintenance.
• Heavier than general vehicle

22. Applications
 Improved Mobility
 Longer tire life
 Reduced fuel consumption
 Protection against soil compaction
 Increased driving stability
 Enhanced productivity for field work
 Improved pulling performance
 Convenient push-button operation

23. Conclusion
 Increases safety, comfort and fuel efficiency
 Flexibility for drivers
 Better option to reduce road accidents
 Field programmable
 Maintains appropriate pressure at higher speeds
 Allows accurate selection of tire pressure for different terrains and load conditions
 Alerts driver of potential tire problems and system status

24. FUTURE SCOPE
 Michelin is working with several other companies to develop an active pressure-management
system called TIPM (Tire Intelligent Pressure Management).
 This system has a compressor that automatically adjusts the pressure in each tire while the vehicle
is in operation to compensate for leaks and slow-leak punctures.
 There are two systems in the early development stages that are oriented toward the consumer
market
 The EnTire system
 The Cycloid Air Pump system(Auto Pump).

25. REFERENCES
• Elnady, T., & Ramadan, A. (2019). Design and simulation of a self-inflating tire system. International
Journal of Mechanical and Production Engineering, 7(5), 77-84.
• Buitrago, D. J., Varela, J. J., & Vásquez, E. (2018). Review of self-inflating tire technology. Ingeniería
Investigación y Tecnología, 19(4), 635-648.
• Lin, Y., Li, X., & Li, H. (2020). Design and simulation of a self-inflating tire system based on
temperature sensing. IEEE Access, 8, 230019-230029.
• Sari, S., & Akin, H. L. (2019). Self-inflating tire design for military vehicles. Journal of
Terramechanics, 86, 1-12.
• Zhang, J., Lin, Y., Li, X., & Li, H. (2021). A novel self-inflating tire system based on pressure sensing
and temperature control. Sensors, 21(8), 2733.
• "Investigation of Self-Inflating Tyres and their Potential Impact on Tyre Rolling Resistance and
Vehicle Fuel Economy" by A. Sathyanarayana and P. Sasikumar (2021)

26. QUESTIONS?

27. Thank You
MVJ College of Engineering
Near ITPB, Whitefield
Bangalore-560067.
principalengg@mvjce.edu.in
Ph: +9180 4299 1040