SAFETY OF VEHICLES

PRESENTED BY:

(GROUP NO:M-P-4)PRATIK WASNIK

TUSHAR ANEYRAO

Introduction

• Necessity of Safety of vehicles

– As number of vehicles are increasing hence number of

accidents and their causes are also increasing. To avoid

this many technologies have been developed recently.

• Latest trends and technologies

– Brake override system

– Hill start assist

BRAKE OVERRIDE SYSTEM

PRINCIPLE OF WORKING

Working and Components

• Sensors

– The sensors detect the simultaneous application on brake and accelerator .

– They send the signals to the computer.

• Computer

– It operates the throttle valve and reduces the power output , so action of braking is performed than accelerating.

Hill Start Assist

• When we move our stationary vehicle standing on a slope we get a backward rolling effect due to gravity.

• This effect may cause accidents viz. hitting vehicle standing behind us or even vehicle can get out of control.

• These causes are minimized by Hill Start Assist.

Components

• Angle sensors

• Pressure sensors

• Torque sensors

• Wheel speed sensors

• Electronic control unit (ECU)

• Brake actuator

Working

• Clutch detection

• Incline detection

• Engine torque detection

• Brake detection

• Backward motion detection

Vehicle moving slightly backward without Hill

start assist

Vehicle moving straight with Hill start assist

BENEFITS

• It makes driving easier in certain situations.

• Less wear and tear on other parts of the car, such as the handbrake, that you might use to do the same job manually.

• In a manual transmission-equipped car you don't have to ride the clutch when starting out on a hill, meaning there's less wear on the clutch.

• By preventing the car from rolling backwards, hill-start control puts less strain on the engine and drive train

REFERENCES

• http://auto.howstuffworks.com/car-driving-safety/safety-regulatory-devices/hill-start-control1.htm

• http://en.wikipedia.org/wiki/Hill_Start_Assist

• http://auto.howstuffworks.com/car-driving-safety/safety-regulatory-devices/brake-override-systems.htm