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1. WELCOME

2. GOVERNMENT POLYTECHNIC COLLEGE KANNUR SEMINAR PRESENTATION

3. Presentation of seminar on 2 EXHAUST BRAKING SYSTEM Presented by ABHINRAJ P Roll No:53 2101023684 Guided by NITHIN BALAKRISHNAN (Lecturer in mechanical engineering)

4. CONTENTS INTRODUCTION LITERATURE REVIEW WHY EBS IN DIESEL ENGINE DEFENITION OF EBS CONSTRUCTION WORKING ADVANTAGES OF EBS DRAWBACKS OF EBS ELECTRONIC CONTROLLED EXHAUST BRAKE CONCLUSION REFERENCE 3

5. INTRODUCTION While slowing down the vehicle, when the throttle is released, the vacuum pressure is not created in the diesel engine while running. Because of this reason, exhaust brake has been implemented by the manufacturers. So wear and tear on the conventional brakes is reduced. Its primary purpose is to assist in slowing down the vehicle by creating backpressure in the exhaust system It’s a valuable tool for enhancing safety and increasing the lifespan of braking components in heavy-duty applications. 4

6. LITERATURE REVIEW R Palanisamy , D Prakash: tells about how the exhaust braking system is used in the vehicle, and their major components and about their pros and cons about the exhaust braking system R. Ajith Surendar , M. Senthilkumar : Exhaust brakes are used in conventional heavy-duty trucks to slow down the vehicle speed. Since the exhaust is compressed and no fuel is being applied, the engine slows down the vehicle. Since it is a mechanically operated baffle plate, it closes fully 90 degrees to restrict the flow. So that backpressure is created and sent back to the exhaust manifold. 5

7. WHY EBS IN DIESEL ENGINE Diesel engines typically have higher compression ratios, which can result in less engine braking compared to gasoline engines. Petrol engine 6

8. DEFENITION OF EBS The brake system which operated by controlling exhaust gas of the engine is called ‘Exhaust Brake’. It creates exhaust back pressure to retard engine speed While downhill driver feels difficulty to control the speed of the vehicle The exhaust brake helps to reduce the unwanted speed during the downhill 7

9. COMPONENTS OF EBS EGT INDICATION OF EBS EXHAUST BRAKE SWITCH 8

10. COMPONENTS Exhaust Brake Switch: An exhaust brake on-off switch allows the driver to activate or deactivate the exhaust brake system in a vehicle by operating a single switch. Exhaust Gas Throttle(EGS): Exhaust Gas Throttles are used for controlling the flow of exhaust gases by adjusting the butterfly valve in exhaust braking system Actuation Cylinder: The actuation cylinder in an exhaust brake system is responsible for controlling the opening and closing of the exhaust brake valve by using compressed air form reservoir tank 9

11. Solenoid Switch: The solenoid is an electromechanical device that consists of a coil of wire and a moveable plunger or valve. When the electrical signal is received, it energizes the coil, creating a magnetic field. And this will operate the flow of compressed Air into actuation cylinder Indication Light: The indication light in an exhaust braking system serves as a status indicator, showing when the system is active, providing warnings of malfunctions, and indicating the on/off status of the exhaust brake. 10

12. CONSTRUCTION 11

13. WORKING When the driver turn on the exhaust brakes, then the path of exhaust gases are restricted because of the valve partially closes the way The restriction In the exhaust path causes a backpressure to build up with the exhaust system The backpressure reduce the engine’s power output as it work against the restriction created by the exhaust brake The reduced engine power leads to deceleration, assisting the regular braking system to slow down the vehicle There are holes are provided this assures the avoidance of damage due to high pressure 12

14. When the deactivation of exhaust brake, the exhaust gases are passed in to the exhaust pipe because the butterfly valve has opened At the time the exhaust gases will flow Freely out of the engine by Exhaust pipe so pressure of the engine gets released Thus the speed of the engine will increased 13

15. ADVANTAGES OF EBS Enhanced Vehicle Control : Exhaust braking systems help improve vehicle control when descending steep grades or navigating challenging terrain. They reduce the need for constant braking and help maintain a consistent, safe speed . Reduced Brake Wear : By using the engine's compression to assist in braking, exhaust brakes reduce the load on traditional friction brakes. This results in reduced wear and tear on the brake components. Increased Safety : Exhaust brakes contribute to safer driving by reducing the risk of brake fade, which can occur when traditional brakes overheat due to prolonged or heavy use. Driver Comfort : Exhaust braking systems often provide a smooth and consistent braking experience, reducing the need for heavy pedal applications and making driving more comfortable for the operator . 14

16. DRAWBACKS OF EBS Limited Braking Force : Exhaust brakes are not as powerful as traditional friction brakes. In emergency situations or when rapid deceleration is needed, they may not provide sufficient stopping power on their own. Engine Temperature : Using an exhaust brake can increase engine temperatures, potentially leading to overheating in certain situations Noise : Exhaust brakes can generate a noticeable amount of noise, which can be a concern for both the driver and bystanders. The noise can be especially pronounced during high-pressure compression release exhaust braking. 15

17. ELECTRONIC EXHAUST BRAKE The advanced exhaust brake systems often incorporate various features to enhance performance and control, including: It ensure variable valve opening for need of required braking force Advanced systems aim to reduce noise and vibration associated with exhaust braking. Often utilize sensors to monitor vehicle speed, grade, and other factors, adapting the braking force accordingly 16

18. CONCLUSION The road hazards related to heavy goods vehicles are partly due to inefficient brake systems, or the failure of brakes. This can be minimized by the use of exhaust brakes thus it increases the brake efficiency and life of the conventional friction brakes. Once the exhaust brakes are installed, they can make a vehicle safer and more secure on the road and they minimize the likelihood of putting the vehicle in accidental situations 17

19. REFERENCE [1] Jump up^ [1], Rowe, Ellis & Nigel Pennick , "Valve" [2] Ma, J., Chen, Y., Yu, Q., Guo, R.: Distance control for automotive’s stopping with retarder. [3] China Journal of Highway and Transport 16(1), 108–112 (2003) (in Chinese) [4] Chengye Liu1 and Jianming Shen: Effect of Turbocharging on Exhaust Brake Performance in an Automobile (2003) 18

20. THANK YOU 19