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HY-WIRE CONCEPTCAR
JASIR.V
Roll.No:63S 7 ME
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INTRODUCTION The name symbolizes the combination of hydrogen as
fuel for the fuel cell propulsion system. The replacement of conventional mechanical and
hydraulic control linkages for steering, braking and othercontrol systems by a drive-by-wire system. By combining fuel cell and by-wire technology, this
vehicle packaged in a new way, opening up a new worldof chassis architectures and customized bodies forindividualized expressions .
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CONCEPT
It is a significant step towards a new kindof automobile that is substantially morefriendly to the environment and providesconsumers positive benefits in drivingdynamics, safety and freedom of individualexpression.
The car is derived from GMs previous
concept of a drive-able fuel cell vehiclecalled the Autonomy which was debuted atthe 2002 North American Motor Show inDetroit
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Skateboard Chassis
Skateboard Chassis 11 flat piece of Aluminum metal houses all the parts
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Drive-by-Wire
In conventional control, the movements thedriver makes with the steering wheel aretransmitted mechanically via steering column tothe steering rack and then to the front wheels
All mechanical linkages and actuators arereplaced by Wires & Electronic sensors
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Drive-by-Wire In a by- wire system, the drivers physical
movement on the steering wheel in sensed andconverted into a digital electronic signal that istransmitted to a Smart Electro Mechanical
Actuation Unit (SEMAU) that controls the wheels
Same principle can be applied to the braking andgearbox systems
DbW consists of a sophisticated pedal positionsensor which closely tracks the position of theaccelerator and sends this information to the
Computer control www.digitalelectronicz.com
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Reasons for superiority to a cable operatedthrottle system :-
a. By eliminating mechanical elements andtransmitting a vehicles throttle positionelectronically, DbW reduces the number ofmoving parts hence greater accuracy, reduced
weight and theoretically no service requirements(like oiling & adjusting the throttle cable)
b. Greater accuracy improves driving experience,improved fuel economy and power delivery as well as lower exhaust emissions
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Drivers control system:
All controls required in a single unit The driver's control unit, dubbed the X-drive , is
a lot closer to a video game controller than aconventional steering wheel and pedalarrangement
Throttle, braking and steering hand controls Gear selection Button system, familiar from
the world of motor racing fig
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FUEL CELL POWER
Electrochemical conversion device that convertshydrogen and oxygen into water , producingelectricity and heat in the process
Provides a DC voltage can be used to powermotors , lights or any number of electricalappliances
Proton Exchange Membrane Fuel Cell (PEMFC) isthe type of fuel cell used in Hy-Wire car
Uses one of the simplest reactions of any fuel cell
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Single fuel cell produces only about 0.7 volts To obtain a reasonably higher voltage , many
separate fuel cells must be combined to form aFuel Cell Stack
PEMFCs operate at about 80 deg. C
Warms up quickly , expensive containmentstructures not required
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Fuel Cell vs. I.C Engine
Energy efficiencyHeat engine: max efficiency ~30%Fuel cell: max efficiency ~60%
Emission reduction (near zero)
No moving parts no noise
Low-temperature operation
Modularitywww.digitalelectronicz.com
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Features
Power Transmission : H2 fuel cell stack and 3-phase AC motor power
transmission mechanism Fuel cell stack made up of 200 individual cells
connected in series 94kW(125 bhp) of continuouspower and 129kW(173 bhp) at peak power
Cell stack kept cool by conventional radiator system
System delivers DC voltage ranging from 125 to 200 volts, depending on load in the circuit
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Control : Brain of Hy -Wire Central computer housed
in the middle of chassis Computer connects to the body electronics
through a single Universal Docking Port Transmits constant stream of electronic
command signals from controller to thecentral computer As well as feedback signals from computer tothe controller
Drivers control unit X-Drive similar to video game controller than a conventionalsteering wheel and pedal arrangement
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X-drive can go anywhere in the passengercompartment currently X-drive swings aroundto either of two front seats
Driver can brake and accelerate with his hands Two ergonomic grips , positioned to the left and
right of a LCD monitor
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To steer glide the gripsup and down lightly
To accelerate - turn eithergrip, just like turning thethrottle on a motorcycle
To brake squeeze eithergrip
Electronic motion sensors, translate this motion intoa digital signal that thecentral computer can
recognize
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The colour monitor in the center of thecontroller displays all the stuff normally foundon the dashboard speed, mileage, fuel level
Also gives rear view images from video cameraon the sides and back of car instead of
conventional mirrors Vehicle can be fine tuned without changing
anything in the cars mechanical components itjust takes some new software to adjuststeering, accelerator or brake sensitivity
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Other features : Front wheel drive vehicle Very open from front to rear there is no
engine compartment Driver provided with greater freedom Single docking port provides the electrical
connection between the all-aluminum chassisand the fiberglass body
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Technical Specifications
Top speed : 100 mph (161 kph) Weight : 4185 pounds (1898 kg) Chassis length : 14 ft 3 in (4.3 m) Chassis width : 5 ft 5.7 in (1.67 m) Chassis thickness : 11 in (28 cm) Motor : 250 to 380 volt 3-phase asynchronous
electric motor Crash protection : front and rear crush zones
to absorb impact energywww.digitalelectronicz.com
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A Few Concerns
Safety is the biggest concern : no connection betweendriver and mechanical elements an electric failure would mean total loss of control
Adding adequate crash protection Energy efficient methods required for producing,
transporting and storing H2 for the fuel cell stacks Current state of technology producing H2 fuel can
generate about as much pollution as using gasolineengines & storage systems still have a long way to go
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Fuel cells cost atleast 10 times more thanconventional power trains
Present hydrogen storage systems provide
perhaps 150 miles of driving Setting up infrastructure dedicated to service
and maintenance of these cars is an expensive
affair such as fuel refilling , body changing,etc.
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Advantages for the Car
Increases responsiveness of system,thereby better steering and braking
Negates usage of steering column,reduces the number of moving parts
Positive environmental implicationsthrough elimination of brake fluids as wellas significant safety benefits
Increased capability due to faultmonitoring and diagnostics
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Advantages for the driver
Enhanced driving experience Less tiring Provides more space for passengers
upfront due to absence of steering columnand associated linkages
Less or nil maintenance due to nearabsence of any moving parts
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Disadvantages
Lack of in-house talent for programming ofsoftware for the electronics
Electromagnetic Interference (EMI) Present limitations of technology makes it
an expensive investment
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CONCLUSION
the chassis architecture provides designers thefreedom to create a number of different bodystyles.
The GM concept provides much more value than just zero emissions and twice the fuel economyIt would provide very affordable all-wheel drive,unprecedented safety and comfort,, no oil changes, maintenance worries or trips tothe gas station.
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Hy-Wire on the road
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Chassis sketch
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- X-drive driving control
Interiors of the Hy-Wire -www.digitalelectronicz.com
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THANK YOU
T
H ANK
YOU
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Questions
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Interiors of the Hy-Wire
back
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Back
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References www.gm.com www.howstuffworks.com www.edmunds.com www.popsci.com
www.cardesignnews.com www.autointell.com www.thecarconnection.com www.sciam.com http://evolution.skf.com/gb www.BSMotoring.com www.autocarindia.com
www.digitalelectronicz.com
http://www.gm.com/http://www.howstuffworks.com/http://www.edmunds.com/http://www.popsci.com/http://www.cardesignnews.com/http://www.autointell.com/http://www.thecarconnection.com/http://www.sciam.com/http://evolution.skf.com/gbhttp://www.bsmotoring.com/http://www.autocarindia.com/http://www.autocarindia.com/http://www.bsmotoring.com/http://evolution.skf.com/gbhttp://www.sciam.com/http://www.thecarconnection.com/http://www.autointell.com/http://www.cardesignnews.com/http://www.popsci.com/http://www.edmunds.com/http://www.howstuffworks.com/http://www.gm.com/8/11/2019 Hy-wire Concept Car
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