Hy-wire cars-BY

ASHISH PANDEY(TE MECHANICAL)

The Hy-wire (Hydrogen drive-by-wire) is a concept car from General Motors originally introduced in January 2002.

The car runs on hydrogen fuel cells. Uses a drive-by-wire system, meaning that the

car is controlled electronically. No need of conventional engine. All equipments needed are in a very compact

place.

Introduction

Two basic elements largely

dictate car design today

:

internal combustion

engine

hydraulic linkages

Why Need HY-WIRE CAR

An internal combustion engine requires a lot of additional equipment to function correctly.

No matter what else they do with a car, designers always have to make room.

The same goes for mechanical and hydraulic linkages.

But the basic function of a car remains the same however they are built.

MAKING MORE ROOM

DEPLETING CONVENTIONA

L SOURCES

INCREASING POLLUTION

GLOBAL WARMING

POLLUTION CONCERNS

1.• Instead of an engine, it has a

fuel cell stack, which powers an electric motor connected to the wheels.

2.

• Instead of mechanical and hydraulic linkages, it has a drive by wire system based on input from an electronic controller.

3.• This is the same control

system employed in modern fighter jets as well as many commercial planes.

HY-WIRE BASICS

A computer actually operates the components that move the wheels, activate the brakes and so on, based on input from an electronic controller.

Electromechanical actuators and human-machine interfaces such as pedal and steering feel emulators are used.

Very user friendly and comforting system

Drive by wire system

There is no steering wheel, there are no pedals and there is no engine compartment.

BASIC STRUCTURE

Every piece of equipment that actually moves the car along the road is housed in an 11-inch-thick (28 cm) aluminium chassis at the base of the car.

Enough space inside. Better drive view.

CHASSIS

Control and transmission

It’s the user machine interface.

Can slide to either side of the vehicle

Has two ergonomic grips, positioned to the left and right of small LCD monitor.

HY-wire Car’s X-drive

For steering

•Glide the grips up and down lightly

To accelerate

• Turn either grip, in the same way you would turn the throttle on a motorcycle

For braking

•Squeeze either grip.

Control of X-drive

1. They also generate electricity by chemical reactions like batteries.

2. Can be continuously recharged3. Very efficient.

POWER – HYDROGEN FUEL CELLS

Anode side:

•2H2 => 4H+ + 4e-

Cathode side:

•O2 + 4H+ + 4e- => 2H2O

Net reaction:

•2H2 + O2 => 2H2O

Chemistry of a fuel cell

How a Hydrogen Fuel Cell Works

Made up of 200 individual cells connected in series.

Collectively provide 94 kilowatts of continuous power and 129 kilowatts at peak power.

The motor controller boosts this up to 250 to 380 volts and converts it to AC current to drive the three-phase electric motor that rotates the wheels

Fuel stack

Power in remote areas such as parks

Military application

Home power generation

Submarines

Other applications of fuel cells

Hydrogen fuel cells are very efficient compared to what we have now

1 • FUEL EFFICIENT

2• ENVIRONMENT

FRIENDLY3 • HIGH STABILITY

4 • HIGHLY SPACIOUS

5 • DRIVER FRIENDLY

6 •FREEDOM OF INDIVIDUAL EXPRESSION

Advantages

LOW SAFETY

STORAGE OF HYDROGEN FUEL

PRICING

SHORTCOMINGS

General Motors says it fully intends to release a production version of the car in 2010, assuming it can resolve the major fuel and safety issues.

It is certainly a good illustration of various ways cars might evolve in the near future.

FUTURE OF HY-WIRE CARS

THANK YOU