real vehiclecontrol

8/12/2019 Real VehicleControl

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A

SEMINAR PRESENTATION ON

VEHICLE SAFETY CONTROL

SYSTEMS

Guided by:Mr. Mayank Sharma

Created by:Arpan Saxena07EARAE009


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1. Introduction

2. Types of Safety Control Systems

3. AntiLock Braking System

4. Electronic BrakeForce Distribution

5.Traction Control System

6.Electronic Stability Control

7.Conclusion

CONTENTS


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Part of vehicle design, construction and equipments.

Meant primarily to minimize the occurrence of mishaps.

Intend to lower the consequences of automotive accidents.

The vehicle control systems regulate a vehiclestravel keeping

it under control even in adverse driving conditions.

INTRODUCTION


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PASSIVE/STATIC SAFETY SYSTEMS

Seat Belts

Airbags

Collapsible Steering

ACTIVE/DYNAMIC SAFETY SYSTEMS

AntiLock Brakes

Traction Control System

Electronic Stability Control

TYPES OF SAFETY SYSTEMS


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Safety system on motor vehicles which prevents the wheels from

locking while braking.

Designed to maintain vehicle control, directional stability and

optimum deceleration under severe braking conditions on most

road surfaces.

A rotating road wheel allows the driver to maintain steering

control under heavy braking .

ANTILOCK BRAKING SYSTEM


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COMPONENTS USED

1.Wheel Speed Sensors

Located at each wheel or in some cases in the differential.

2. Valves

There is a valve in the brake line of each brake controlled by the

ABS.

3. Pump

When a valve reduces the pressure in a line, the pump is there to

get the pressure back up.

4. Controller

Activate the ABS modulator which actuates the braking valves on

and off.


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OPERATION

Monitors the rotational speed of each wheel and controls the

brake line pressure to each wheel during braking.

The sensors send a variable voltage signal to the control unit, and

determines whether a wheel is about to lock up .

When a wheel is about to lock up, the control unit signals the

hydraulic unit to reduce hydraulic pressure (or not increase it

further) at that wheelsbrake caliper.

Pressure modulation is handled by electrically-operated solenoid

valves.


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LAYOUT OF ABS


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CONFIGURATION OF ABS


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CONFIGURATION OF ABS


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HUB LEVEL CONFIGURATION OF ABS


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COMPONENTS USED


To determine the slip ratio of a wheel, the EBD system needs two

pieces of information: the speed at which the wheel is rotating and

the speed of the car.2. Brake force modulators

Brake force is applied to the wheels hydraulically, with brake fluid

pumped into brake lines in such a way as to pneumatically activatethe brake cylinders.


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EBD OPERATING CONDITIONS


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TRACTION CONTROL SYSTEM

Typically a secondary function of the antilock braking system on

production vehicles.

Designed to prevent loss of traction of the driven road wheels.

Maintain the control of the vehicle when excessive throttle is

applied by the driver and the condition of the road surface unable

to cope with the torque applied.
http://en.wikipedia.org/wiki/Vehiclehttp://en.wikipedia.org/wiki/Vehicle


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INTERVENTIONS

Reduces or suppress the spark to one or more cylinders.

Reduce fuel supply to one or more cylinders.

Brake one or more wheels.

Close the throttle, if the vehicle is fitted with drive by wire

throttle.

In turbo-charged vehicles, the boost control solenoid can be

actuated to reduce boost and therefore engine power.


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1.Control Module

A common control module is often used or TCS.


The same wheel speed sensors are used.

3.Accumulator

To generate and store hydraulic pressure for TCS braking.

4.Modulator

The same modulator (with a couple of extra solenoid valves) is

used to control braking.

COMPONENTS USED


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OPERATION

The primary input to the TCS control program comes from the

wheel speed sensors.

The sensors continually monitor the speed of the wheels anytime

the vehicle is moving.

The sensors generate a signal that indicate a wheel is losing

traction, skidding or spinning.

Traction control applies the brakes on the drive wheel(s) that is

losing traction.
http://en.wikipedia.org/wiki/Vehiclehttp://en.wikipedia.org/wiki/Vehicle


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USE OF TRACTION CONTROL

In road cars: Traction control has traditionally been a safety

feature in high-performance cars when accelerating, especially in

wet, icy or snowy conditions.

In race cars: Traction control is used as a performance

enhancement, allowing maximum traction under acceleration

without wheel spin.

In off road vehicles: Traction control is used instead or in

addition to the mechanical limited slip or locking differential.

The spinning wheel is slowed down with short applications of

brakes, diverting more torque to the non-spinning wheel.


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ELECTRONIC STABILITY CONTROL

Safety system that assists the driver to keep the vehicle on the

intended path and helps to prevent accidents.

Always remains in action while vehicle is in motion.

Counteracts by braking the desired wheels while the vehicle

understeers or oversteers.


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COMPONENTS USED

1. Wheel-speed sensors

One wheel-speed sensor at each wheel compares to the speed of

the engine.2. Steering-angle sensors

This sensor measures the direction the driver intends to aim the

car.

3. Rotational-speed sensorYaw sensor that measures the side-to-side motion of the vehicle.


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OPERATION

Compares the driver's intended direction to the vehicle's actual

direction.

ESC intervenes only when it detects loss of steering control, i.e.

when the vehicle is not going where the driver is steering.

ESC estimates the direction of the skid the brakes to individual

wheels asymmetrically in order to create torque about the vehicle's

vertical axis.

ESC can work on any surface, from dry pavement to frozen lakes.


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SITUATIONAL ANALYSIS OF ESP


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CONCLUSION

Passenger and vehicle safety is being taken as a matter of utmost

importance.

Companies are working a lot on developing newer, better and

more reliable vehicle control and safety systems matching the

extraordinary performance of the vehicles being produced.


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Thank You!!

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