The Future of the Automobile - Automotive News · The automobile and Physics 201 The power required...
Transcript of The Future of the Automobile - Automotive News · The automobile and Physics 201 The power required...
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THE FUTURE OF THE AUTOMOBILEfor Personal TransportationJune 14, 2011
Sorry, but this is not thefuture of the automobile !
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PAUL B. WILBURPRESIDENT & CEOAPTERA MOTORS
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Standard
Higher Std
U.S. CAFÉ Standards for Passenger Cars…
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Today!
Revolution
Evolution (?)
Very few changes in fuel economy overthe past 20 years
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The Aptera approach is based on
“first principles”
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No, not Angus MacKenzie…This is Sir Isaac Newton! It’s back to Newtonian physics…
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The automobile and Physics 101
A vision for all vehicles in the future –
must consider all of the forces on a vehicle…
Aerodynamic down force
Weight & Grade
(effects of gravity)
Motive Force
Aero drag
Braking forces
Rolling resistance
Other friction related
Aerodynamic Lift
FRONT
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The Auto Union Type C-16 “Silver Arrow”
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The automobile and Physics 201
The power required for a vehicle to overcome
the force of aerodynamic drag is …
Since energy used is a function of the cube of velocity times
the form of the drag area. The faster we go, the power
required also goes up by the cube of the velocity…
aerodynamics become mission critical, esp. in freeway driving
Where r is the density of air – so we aren’t going to impact that one too much…
Power Drag = ½ ρ v3 CD A
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Power accelerate = ((1/2 m v2)/t)
Where m = mass; v = final speed; t = time
The automobile and Physics 301
The power required to accelerate a vehicle …
Energy to accelerate is a function of the mass of the vehicle and how
anxious the driver is to get where he’s going.
The faster we go is a squared function of the power that must be used.
Therefore, Low Mass is critical, especially in City based start and stop
driving and that is most of the driving that most Americans do… 6
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The Final Physics Class - Ph962
Reduce the FRICTIONAL LOSSES and there are many…
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There are 4 essential „building blocks‟ that
must be considered critical in the design
of future, more efficient passenger vehicles.
NOW - If we can’t change the speeds that we drive
or the way we accelerate away from a stop light,
we MUST find our energy savings in the fundamental -
physical attributes of the automobile …
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A Physics Lesson for all OEMs
Fully composite, monocoque body (not CF) which is 3X stronger than steel
Coefficient of drag roughly ½ of all
existing vehicles on the road today
Recapturing “energy” during
deceleration using electric drive!!!
instead of an ICE drive train.
To reduce frictional losses everywhere (electric motor is 94% efficient, 1 speed direct
drive transaxle with electric park pawl, high efficiency wheel bearings, brake pads with spring back function, low RR tires, electric steering, electric compressor vs serpentine belts, etc.)
APTERA believes these factors are absolutely critical to consider
when designing the next generation of ultra fuel efficient vehicles:
1. Low mass materials
2. Aerodynamic forms
3. Regenerative braking(true power train efficiency)
4. Lower rolling resistance
Aptera‟s Engineering Approach
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The Aptera Formula
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• Aerodynamics - Drives energy consumption at high speeds
• Weight - Drives energy consumption at low speeds
• Safety - A requirement in the vehicle purchase decision
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Aptera‟s Mission
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To design, manufacture and sell vehicles that set
a new benchmark in “energy efficiency”!
– Argonne National
Labs certified this level
of “fuel efficiency” in
our “proof of
concept” vehicle in
September of 2010.
– On the same basis:
• Nissan Leaf achieves - 99 MPG-e (as an electric)
• Chevy Volt achieves - 93 MPG-e (electric
only) but only 37 MPG
(in gas mode)
All Aptera vehicles > 200 MPG-e (EPA)
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Where must we look for fuel economy as
the CAFÉ standards rise significantly?Market penetration of new technologies for light-duty vehicles, 2008 and 2035 per EIA
0 20 40 60 80 100
Percent market share
Source: Annual Energy Outlook 2010
Material substitution
Camless valve activation
Turbocharging
Advanced transmission
Aggressive shift logic
Drag reduction
Accessory improvements
2008 2035
Not needed for a one speedtransaxle electric vehicle
N/A for an EV – ICE engines only
N/A for an EV – ICE engines onlyAnyone for Mr. Fusion?
N/A for an EV w/ 1 speedTrans unless CVT optimized to peak electric motor specs.
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“One thing is clear: the
era of easy oil is over.
What we all do next
will determine how
well we meet the
energy needs of the
entire world in this
century and beyond.”
– David J O‟Reilly, Chairman & CEO, Chevron
Corp, July 2005
Don’t Laugh
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“The Stone Age ended before the world ran out of stone and the oil age will end before the world runs out of oil! ”
-Paul Wilbur, CEO Aptera, July, 2009
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The Automobile Company of the Future