Vehicle_safety_123716_Punit_Jain.pptx

7/28/2019 Vehicle_safety_123716_Punit_Jain.pptx

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National Institute Of Technology, Warangal

Presentation On Vehicle Safety

Guided By:Dr. G. Amba Prasad Rao

Presented By:

Mr. Punit Jain

M.Tech. 1st Year

Roll No. 123716


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Introduction

Automobile safety is the study and practice

of design, construction, equipment and

regulation to minimize the occurrence and

consequences of automobile accidents.

Two types: Active systems Passive Systems


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Air Bags

It is an occupant restraint system consisting

of a flexible fabric envelope designed to

inflate rapidly during an

automobile collision.

Its purpose is to cushion occupants during

a crash and provide protection to theirbodies when they strike interior objects

such as the steering wheel or a window.


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Seat Belts

Device designed to secure the occupant

a vehicle against harmful movement that

may result during a collision or a sudden

stop.

It keeps occupants positioned correctly for

maximum effectiveness of the airbag (ifequipped) and by preventing occupants

being ejected from the vehicle in a crash.


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Full Wrap Frontal Crash Test

Objective

Protection of its occupants in the event of a

serious real world frontal crash.

Picture courtesy JNCAP


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Frontal Crash Test Procedure

Test dummies are placed in both the

driver's and front passenger's seats and the

vehicle is made to collide with a concrete

barrier at a rate of 55 km/h.

The dummies are checked for injuries

The vehicle is checked for damage anddeformation


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Offset frontal collision test

Test Procedure

Dummies are placed in the driver's and rearpassenger's seats

Test vehicle is made to collide head on on thedriver's side (at an offset of 40%) with analuminium honeycomb at a rate of 64km/h.

The dummies are checked for injuriesThe vehicle is checked for damage and

deformation


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Side collision test

Causes the most damage next to frontal

collisions.

Procedure:A trolley with a mass of 950 kg is made to collide

at a speed of 55 km/h with the side of a

stationary test vehicle with a dummy normally

on the drivers seat.


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Front of the trolley has been outfitted with a

shock absorbent aluminium honeycomb which

provides a similar degree of hardness as such a

vehicle.Side curtain air bags has been taken in test from

FY2008.


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Collision tests for electric cars.

Tests are carried out for full wrap frontal

collisions, offset frontal collisions and side

collisions.

Performance is evaluated in regard to the

passengers not receiving any electric

shocks, any leakage of the electrolyte fromthe high voltage battery and the battery

attachment condition.


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Rear-end collision test

In Rear end collision neck injury are most

commonly among the passenger injuries.

Rear end collision shocks (velocity change(V), wave shape, etc.) are given to

dummies placed in the driver's or front

passenger's seats.


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Test reproduces rear end collision shocks

when a car crashes into a parked car which

is the same in mass at a rate of around

32km/h (velocity change(V) of 17.6km/h).


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Pedestrian Protection Tests

Pedestrian head protection tests.

Procedure

An adult or a child pedestrian's head simulated

impactor (head impactor) are projected toward

the car bonnet, etc., from the testing machine.

The impact received by the head impactors is

measured and then evaluated using head injurycriterion (HIC).


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The impacting speed of head in the domestictechnical regulation is 32km/h (The collisionspeed received by the pedestrian against the caris equivalent to 40km/h.)

Impact angles differ according to the shape of thefront part of 3 types of vehicles; sedan, SUV, andOne Box.

Test vehicles are divided by the vehicle type.Tests are done in each testing area under eachimpact condition.


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Pedestrian leg protection performance test

Procedure

leg impactor (FLEX-PLI) dummy made to

represent the leg of an adult male is launched by

the testing machine at a speed of 40 km/h at the

bumper of the test car.

Injuries to the knee and shin area at the point ofimpact are measured and evaluated on a four

point scale for the degree of injury when the

vehicle collides with a pedestrian.


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Electronic stability control

Esc is an extension of ABS which has speed sensors and

independent braking for each wheel.Additional sensors

monitors how well a vehicle is responsible to a driver's

input.


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Emergency brake assist

When sensor detect panic braking, system boosts braking

power to reduce stopping distance.


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Blind Spot warning/detection

Radar or digital cameras detect whether vehicles are

moving within blind spot zones and warn drivers.


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Google Autonomous Car


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Passenger Seat Belt Reminder

Passenger Seat Belt Reminder (PSBR) is a

device that notifies the driver and others

when a passenger other than the driver is

not wearing a seat belt.


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References

http://auto.howstuffworks.com/car-driving-safety/auto-safety-testing/how-is-active-automotive-safety-tested1.htm

Schner, Dr. Hans-Peter. "Testing and Verification of Active

Safety Systems with Coordinated Automotive Driving." (Nov.17, 2010) http://www-nrd.nhtsa.dot.gov/pdf/esv/esv21/09-0187.pdf

NHTSA. "Updated Review of Potential Test Procedures forFMVSS No.208." October 1999. (Nov. 17, 2010)http://www.nhtsa.gov/DOT/NHTSA/NRD/Multimedia/PDFs/Crashworthiness/Air%20Bags/FMVSS_208_II.pdf


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Thank You

Vehicle_safety_123716_Punit_Jain.pptx

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