Title: Diesel Hybrid Automobiles and a Greener, More Independent Future
1Introduction
- Diesel Hybrid Automobiles and a Greener, More
Independent Future - Weston Eidson weston_at_webmail.us
2History
- First Hybrid Vehicles
- Jacob Lohner Co in Vienna, Austria produced
electric cars from 1898 to 1906.Ferdinand
Porsche, one of Lohners employees developed a
drive system based on fitting an electric motor
to each front wheel without transmissions (hub
mounted). Vehicles of this type were known as
Lohner-Porsches.
3History Cont.
- Racing version of the front wheel driven,
petrol-electric Lohner "Porsche - This vehicle
was entered in the 1900 "Semmering" race and is
driven by Dr. Porsche him self. - Too Expensive to Compete with conventional
propulsion so they were abandoned. - Some claim Porsche invented the first four wheel
drive car which was also a hybrid.
4History Cont.
- Main reason for the early development was to
assist the meager power of the internal
combustion engine, when this was no longer needed
the idea of the electric hybrid went dormant for
decades. - In 1905 H. Piper filed a patent for a
petrol-electric hybrid vehicle. His idea was to
use an electric motor to assist an
internal-combustion engine, mainly to augment the
ICE to let the vehicle accelerate to 40
kilometers (25 miles) per hour in 10 seconds,
instead of the usual 30. By the time the patent
was issued, three and a half years later, engines
had become powerful enough to achieve this kind
of performance on their own. - From 1897 to 1907, the Compagnie Parisienne des
Voitures Electriques (roughly, Paris Electric Car
Company), built a series of electric and hybrid
vehicles, including the 1903 Krieger. With
front-drive and power steering, the Krieger
wasn't built in much quantity. One model ran on
alcohol, and there was another version with what
has been described as a gasoline-turbine engine
in those times, the term "turbine" sometimes
meant generator." - Cheap petrol and advances in ICE and automobile
production in general (Henry Ford) gradually
killed off the Hybrid "Cars".
5History Cont.
- A notable exceptions is the1921 Owen Magnetic
Model 60 Touring which uses a gasoline engine to
run a generator that supplies electric power to
motors mounted in each of the rear wheels. - Similar to Submarines
6History Cont.
- Hybrid cars did not appear again until the in
1960's and 1970's, when cars like the 1965 GM512
and especially the 1973 VW Taxi Hybrid Vehicle
which was produced in the wake of the Arab Oil
embargo. - But Hybrid Vehicle technology did not disappear
its development continued in another arena.
7Chicagos Own Pioneer Zephyr
- Record time from Denver to Chicago using
Diesel-Electric power - 1934 made the 1,015 mile trip in just over 13
hours with an average speed of 77 MPH - 112.5 mph
8Zephyrs Locomotion
- The Pioneer Zephyr, like modern locomotives, is
essentially an electric train that doesn't need
overhead wires or a third rail. Instead, it
generates the electricity it needs with its own
diesel power plant on board. - The generator converts the mechanical power
output of the diesel engine into electricity. - Here's How The engine crankshaft extends into
the generator, where it is wrapped with coils of
conducting wire and is surrounded by a stationary
magnetic field. A DC electric current is produced
in the coil as the shaft rotates in the magnetic
field. The electricity runs motors that turn the
wheels, setting the train in motion. - The Pioneer Zephyr could generate up to 750 volts
of electricity to move the train.
9Zephyrs Locomotion Cont.
- The Zephyr's diesel-electric power plant
generated 600 horsepower, making the Zephyr more
energy efficient than steam locomotives. But a
new kind of engine was only one improvement in
CBQ's revolutionary train. The next step was to
put the engine in an equally efficient body. - Diesel-electric locomotives are more efficient
than steam locomotives at turning heat into
useful mechanical energy. In a steam locomotive,
burning fuel boils water, converting it into
steam. The expanding steam pushes the pistons
that turn the wheels. A lot of heat, or energy,
is lost in making and delivering steam. - In a diesel-electric locomotive, burning diesel
fuel pushes the pistons directly. Converting this
mechanical energy at the traction motors for the
wheels occurs with much less heat loss. - This is why diesel-electric locomotives can
convert up to 40 of the heat from burning fuel
into useful power. Steam locomotives could rarely
do better than 6 because of their greater heat
loss.
10In Chicago U-505
- Diesel on the Surface
- Diesel engines propelled U-boats on the surface,
while electric motors provided power underwater.
The U-505 had two nine-cylinder, 2,200
horsepower, turbocharged diesel engines, each of
which turned a screw or propeller. Using diesel
power, the U-505 had a top speed of 18.3 knots.
Cruising at 12 knots, the U-505 could travel as
far as 11,000 nautical miles before having to
refuel. At times, temperatures in U-505s diesel
engine room exceeded 100F, and the noise was
literally deafening. To make matters worse, the
fumes made the crews food taste like diesel
fuel. - Electric when Submerged
- When U-boats dove, the only air for the crew to
breathe came from air trapped in the boat and a
small number of oxygen bottles. The U-505 could
not use the diesel engines underwater because the
engines would have consumed all the available air
and created exhaust, causing the crew to
suffocate. Before diving, the diesel engines were
disconnected so that two 500 horsepower,
battery-powered electric motors could propel the
boat underwater. Running on the electric motors,
U-505 reached a top speed of 7 knots. After
traveling a maximum of 63 miles, the boat was
forced to surface and use its diesel engines to
recharge its electric batteries.
11Hybrid Electric Vehicle
- Though not todays hybrids the previous examples
laid the groundwork. - The Subs Could Run on Only Diesel Power However.
12Diesel Over Gasoline
- New Diesel cars produce less carbon dioxide and
nitrous oxide and get 20 to 40 percent better
mileage than vehicles already on the market. - Revised federal pollution rules that took effect
in January reduce the allowable sulfur content of
diesel fuel from 500 to 15 parts per million, and
the new cars are outfitted with sophisticated
exhaust and filtering systems that further cut
pollution. - Consumers will pay extra for a diesel, though not
as much as the 2,000 to 7,000 tacked on to the
price of gas-electric hybrids. For instance, a
Mercedes-Benz E320 diesel sedan costs about
1,000 more than a similar gas model. - But it gets more than 35 miles per gallon, about
10 miles per gallon better than a comparable
gas-fueled Mercedes.
13Diesel Over Gasoline Cont.
- Makers of diesel vehicles say they also are
prepared to seek a consumer tax break similar to
the one hybrid buyers enjoy, about a 2,000
federal deduction. - Chrysler, which is owned by German automaker
DaimlerChrysler and also makes Dodge and Jeep
brands, will offer diesel-powered passenger cars.
But Ford Motor Co. and General Motors Corp. plan
to limit their diesel business to trucks until
they see how the American market for passenger
cars unfolds.
14Diesel Over Gasoline Cont.
- Autobytel Inc., an online auto marketplace,
showed 72 percent of Americans would "absolutely"
consider buying a diesel vehicle. - J.D. Power and Associates forecasts that diesels,
which currently account for just 3.4 percent of
the cars on the road in the United States, will
hit 15 percent within eight years. By comparison,
J.D. Power projects that by 2011 hybrids will
have only about 3 percent of the market, 11 years
after the first one came ashore.
15Diesel Over Gasoline Cont.
- unlike gas-powered cars, diesels do not emit high
levels of carbon dioxide, a critical greenhouse
gas. Diesel pollution has come from nitrous oxide
and particulate emissions, which contribute to
smog and acid rain. But the new fuel, used with
the new filter and exhaust systems, significantly
cuts so-called "nox" and particulate emissions. - A four-cylinder diesel engine also can be more
powerful than a similar-size six-cylinder
gasoline engine, and a six-cylinder diesel can
best a gas-guzzling V-8. Diesel-powered
eight-cylinder SUVs, such as the line
Mercedes-Benz intends to introduce next year, can
achieve at least 24 miles per gallon, far better
than the 10 to 16 miles per gallon many SUVs get.
- Durability is another selling point for diesels,
say automakers. Because the engines are so well
made, it is not uncommon for them to last 500,000
miles, whereas a gasoline engine that logs
150,000 miles is considered ancient. - Urea, a common chemical compound, will have to be
periodically replenished by owners, causing the
Environmental Protection Agency to worry it will
not be done but onboard computers can remind
drivers and if need be limit the performance of
the vehicle until the reservoir is filled,
similar to filling windshield wiper fluid.
16How Hybrids Work
- http//videos.howstuffworks.com/mazda-hybrid-video
.htm
17Diesel Hybrid Best of Both Worlds
- source at BMW is still confident that current
diesels have hybrids beat. "Hybrid cars are very
good for slow and stop-start driving but not so
good at higher speeds. Overall, our diesel
vehicles are still more economical." A
diesel-hybrid could be even more economical.
18Problem Has Been Price
- More Expensive Engine
- Buckling the Systems
- Chassis
19How the Diesel Hybrid WorksCase Study, Peugeot
Citroën
- Hybrid technology using a petrol engine is not
very competitive financially, and does not offer
significantly better fuel economy or CO2 emission
performance than a conventional HDi diesel
engine. However, PSA Peugeot Citroën believes
that combining a hybrid powertrain with an HDi
engine would constitute a step change in terms of
improved fuel economy and lower CO2 emissions in
Europe, where diesel engines are already widely
used. - PSA Peugeot Citroën statement
20Case Study Cont.
- Model year 2010, Looks Closest to coming to
Market, At least in Europe - The hybrids deliver average combined city and
highway fuel consumption of 3.4 liters per 100
kilometers (69 mpg US), with 90 grams of CO2
emitted per kilometera tank-to-wheel record for
compact cars, the most popular segment in Europe.
This is about 25 better than a similar vehicle
equipped with a gasoline hybrid system, or as
much as a liter per 100 kilometers in combined
city and highway driving. - Todays Toyota Prius is estimated at 52/45 MPG
21Case Study Cont.
- PSA Peugeot Citroëns Hybrid HDi technology
includes - 1.6-liter HDi engine and diesel particulate
filter system (DPFS) - New-generation Stop Start system
- Electric motor and inverter
- High-voltage battery pack
- Dedicated control electronics
- All-electric mode for speeds under 50 kilometers
an hour (31 mph) - Driver selection of Extended ZEV (Zero Emission
Vehicle, i.e., all-electric) mode - Electronically-managed gearbox
22Case Study Cont.
23Case Study Cont.
- Engine
- The prototype marks the first combination of the
1.6-liter, 66 kW HDi engine with the latest
generation Stop Start system. The company added
a dedicated control system to the engine, using
operating instructions coordinated directly by
the powertrain management unit (PTMU), most
notably for engine starts and stops, while also
guaranteeing delivery of the torque required by
the driver. - The engine, with the diesel particulate filter
system (DPFS), meets Euro-4 standards.
- Toyota Prius
- Gasoline engine 1.5-L, 16-valve, 4-cylinder,
- cast-aluminum block and head, EFI Atkinson-
- cycle VVTi (Variable Valve Timing with
- intelligence), 1301 compression ratio, 70 hp
- at 4,500 rpm, 82 lb-ft of torque at 4,200 rpm
24Case Study Cont.
25Case Study Cont.
26Case Study Cont.
- Stop Start system. The Stop Start system used
in the Hybride HDi powertrain is based on the
technology integrated in both the Citroën C2 and
C3. The new system has 40 more power than the
first generation to support the easier starting
of the 1.6-liter diesel. - In the hybrid powertrain, the Stop Start system
restarts the ICE. While the Stop Start function
is only used on the C3 when the vehicle is
stationary, the engine stop function can occur at
any given moment on the Hybride HDi, as soon as
the vehicles speed falls below 60 kilometers an
hour (37 mph).
27Case Study Cont.
- Electric motor and inverter, The synchronous
permanent magnet electric motor develops 16 kW of
continuous power, with 80 Nm of torque. It offers
peak power of 23 kW and 130 Nm to meet occasional
demand from the driver. - PSA Peugeot Citroën opted for the volume and
performance of the motor to ensure that the
all-electric mode would be used for speeds up to
50 kilometers per houra speed typical of city
driving. - Connected to the inverter, the motor operates in
a voltage range from 210 to 380 volts. In the
restricted space available, this electric
motor/inverter does not enable use of the
conventional engine cooling circuit, whose
typical temperature is too high. Water cooling is
therefore provided by a special radiator and a
low-temperature cooling circuit at 60C. - For main road and highway driving, the electric
motor can provide a 35 power boost for extra
acceleration.
- Toyota Prius
- Electric motor Three-phase AC permanent
- magnet with peak power of 33 kW/44 hp
- at 1,0405,600 rpm, peak torque of
- 350.0 N-m/258 lb/ft (0400 rpm)
28Case Study Cont.
- Battery system. The battery pack consists of 240
NiMH (Nickel-Metal Hydride) cells that deliver 23
kW of power at a nominal voltage of 288 volts.
The cells are cooled by special air intakes that
recover air from the passenger compartment,
taking advantage of its temperature control. - There is also a conventional 12V storage battery,
which continues to handle its usual functions. - The high-voltage battery pack fits in the rear
part of the Groups platform 2 vehicles (base for
the Peugeot 307 and Citroën C4) in place of the
spare tire, following a slight modification to
the cut-out in this compartment. Adding the
batteries does not reduce trunk capacity for any
of the vehicles.
- Toyota Prius
- Battery Sealed nickel-metal hydride battery,
- 274 volts
29Case Study Cont.
- All-electric mode Zero Emission Vehicle (ZEV).
The driver can use a special switch to access an
extended all-electric mode that expands the
operating range for the vehicle in this mode. In
this case, the ICE is only activated for more
prolonged acceleration. - The extended all-electric mode is de-activated
either automatically, when the high-voltage
battery pack no longer has a sufficient charge,
or manually, by using the dedicated switch.
30Case Study Cont.
- Economics and Future. PSA Peugeot Citroën says
that while it could market its Hybride HDi
vehicles as early as 2010, the introduction is
dependent upon its ability to make the technology
available at an affordable price. - Today, the price gap between a Hybride HDi model
and a comparable diesel HDi model is still too
wide and would have to be halved to make diesel
hybrid vehicles accessible to most consumers. - The Group is planning a two-pronged approach to
reach that goal - Extensive RD on the four areas that generate
most of the extra cost high-voltage batteries,
electric motor/generator, inverter and the
regenerative braking system. - Unite the expertise of equipment manufacturers
and research laboratories to focus on this
project. - PSA Peugeot Citroën has asked the French Agency
for Industrial Innovation to support the project.
31Case Study Cont.
32Case Study Cont. CO2
- Band CO2 emissions
- A lt100 g/km
- B 101-120 g/km
- Peugeot Citroën Has Tested at (80 g/km) city and
(90 g/km) highway
- Examples
- Honda Insight petrol electric hybrid (80 g/km)
- Smart diesel (90 g/km)
- Toyota Prius 1.5 litre petrol-electric hybrid
(104 g/km) - Smart car 0.7 litre petrol (113 g/km)
- Citroen C2 1.4 litre diesel (108 g/km)
- Ford Fiesta 1.4 diesel (114 g/km CO2)
33Smart Car Diesel Hybrid
- The diesel hybrid version of the smart car
consumes just 2.9 liters of fuel/100 km (81 mpg
US). - The diesel hybrid combines a 20 kW electric motor
with the 30 kW (40 hp) diesel engine. The design
is much the same as Crosstown (gasoline) hybrid,
with the electric motor providing start-stop
functionality, drive assistance, shift delay
bridging and regenerative braking. - Because the cars shift delays are bridged by the
electric motor, it only needs 17.8 seconds to
accelerate from zero to 100 km/h. Thats ten
percenttwo secondsbetter than with a
conventional diesel drive.
34Smart Car Diesel Hybrid Cont.
- The Diesel Is Much More Economical in terms of
MPG - No Commercial Plans Yet However
35Where Are We Now? Chicago CTA
- Chicago, Among Other Cities Has a Small Test
Fleet of Diesel Hybrid Busses. - Hybrid buses are a good example of what Ive
been saying for some time there really is no
downside when it comes to protecting the
environment, said Mayor Daley. It improves
public health it beautifies the city it saves
money and it enhances the quality of life. - The New Flyer hybrid bus is powered by both a
diesel engine and electric motor for improved
fuel efficiency and up to a 90 percent reduction
in emissions compared to a diesel powered bus.
36Chicago CTA Cont.
- We will be evaluating the performance of these
hybrid buses in Chicagos extreme weather
conditions and compare the two types of drive
systems to determine if hybrid buses are suitable
as future additions to CTAs fleet, said CTA
President Frank Kruesi. Other new buses in our
fleet are equipped with low-emission engines that
produce 60 percent fewer emissions than the buses
they are replacing, so if the hybrids perform
well, we have the potential for emission levels
to fall even further. - The 20 hybrid buses are part of CTAs larger
investment of 650 low-emission buses that are
replacing aging buses in CTAs fleet. The buses
are manufactured by New Flyer in St. Cloud,
Minnesota. The average cost of a hybrid bus is
530,000, compared to 341,000 for a standard
diesel bus. - Notice the Battery Packs on top of the bus
37Chicago CTA Cont.
- Emission levels from CTA buses in 2005 was 22
percent of 564 tons less than the annual emission
level in 1997, even as ridership has grown by 12
percent over the same period. By converting to
ultra low sulfur diesel fuel in 2003, the CTA is
well ahead of schedule in implementing the 2007
Federal Emission requirements for reduced
particulate matter and carbon monoxide.
38Chicago CTA Cont.The Two Forms Of Hybrids
Discussed
- The first 10 hybrid buses to arrive will be
equipped with a parallel drive system, which is
similar to a hybrid system found in a car. An
on-board computer blends the diesel engine power
and the electric motor power from the battery
unit for optimum efficiency. When the vehicle
leaves a stop, it will operate initially on
electric power and as its speed increases, it
will operate on a combination of electric power
and diesel engine power until it reaches an
optimum speed where it will operate entirely on
the diesel engine. - The second 10 to arrive will be equipped with a
series drive system, which is a more traditional
generator-driven traction motor propulsion
system. In this system, the diesel engine runs a
generator. The generator provides electric power
to the traction motors which, in turn, power the
bus. A computer manages power to the traction
motors and battery. At certain times during
operation, the bus runs on generator power or
battery power.
39Second Form of Hybrid
- Mild Hybrid Chevrolet found 10 increase in
fuel economy by shutting down and restarting the
engine on demand . - Conventional vehicles with oversized starter
motors, allowing the engine to be turned off
whenever the car is coasting, braking, or
stopped, yet restart quickly and cleanly.
Accessories can continue to run on electrical
power while the engine is off - Some have Regenerative Braking
- Many people do not consider these to be hybrids
at all since they do not have hybrid drivetrains
(there is no electric motor to drive the
vehicle), and these vehicles do not achieve the
fuel economy of full hybrid models.
40Future of Diesel Hybrids
- Aptera hybrid is to be built from lightweight
composites, and designed to deliver its 330 mpg
in normal city and highway driving and
demonstrate acceleration and handling similar to
that of a Honda Insight. - Production powertrain will consist of a 12 hp (9
kW) diesel engine with a 25 hp (19 kW) permanent
magnet DC motor. (Accelerated Composites is
designing the prototype with a gasoline engine
for cost.) The electric motor is coupled through
a Continuously Variable Transmission (CVT) when
the engine is off the car can run on the electric
motor alone. - The company plans to use ultracapacitors for
energy storage, although it is working with
lightweight lead gauze batteries in the
prototype. (Lead gauze batteries suspend the
electrolyte in a gauze material.) - The Aptera weighs 850 lbs and is made almost
entirely of lightweight composites, based on
Accelerated Composites Panelized Automated
Composite Construction (PAC2) process. It
accelerates from 060 mpg in 11 seconds, and has
a top speed of 95 mph.
41Future of Diesel Hybrids Cont.
- BMW Rumor
- source at BMW is still confident that current
diesels have hybrids beat. "Hybrid cars are very
good for slow and stop-start driving but not so
good at higher speeds. Overall, our diesel
vehicles are still more economical." A
diesel-hybrid could be even more economical. - working on diesel hybrid versions of its 5-Series
sedan and X5 sport utility vehicle, both in time
for 2010.
42Future of Diesel Hybrids Cont.
- Based on the new 2006 Mercedes-Benz S-Class, the
Bluetec Hybrid uses what the company claims to be
the "cleanest diesel in the world." A process
called Selective Catalytic Reduction--literally
the use of urea injected into the
exhaust--neutralizes gases and reduces nitrogen
oxide emissions by 80 percent. - The hybrid system allows a twenty-percent
reduction in fuel consumption compared to a
conventional S-Class diesel. - Zero to sixty mph in just over seven
seconds--about as fast a gasoline-powered V-6
S-class - However looks as though the company will prefer
to further research fuel cells
43Future of Diesel Hybrids Cont.
- Toyota to sell diesel hybrid by 2010 thanks to
Isuzu - Toyota's recent purchase of a 5.9 stake in Isuzu
will bear fruit in 2010 when the Japanese
juggernaut marries its Synergy hybrid drive
system with a diesel engine. Presumably such a
hook up was made possible, or at least hastened,
by the expertise in diesels that Isuzu brings to
the table. - as diesel engines excel in efficiency when
cruising at highway speeds, much more so than a
gasoline engine, which to this point has always
been the electric motor's dance partner in modern
hybrids. - JapanToday is reporting that a Toyota subcompact
with this diesel hybrid drivetrain will be
available as soon as 2010.
44Future of Diesel Hybrids Cont.
- 1.7-liter CDTI engine, delivers up to 25 to 30
percent improved fuel economy - 59 miles per gallon
- Integrating both hybrid and diesel technology
could add up to 8,000 to the price of a vehicle,
which may limit its appeal to American consumers.
"Even (with gas at) 3 a gallon, 8,000 (more) is
a lot to pay." - DaimlerChrysler's future diesel hybrids will be
based on the hybrid technology being developed
with GM and would be available in late 2007 or
early 2008, according to Quinnell. In the future,
"Adding the hybrid option would be an option to
check off," as customers do today to request a
turbo-charged engine, Quinnell said.
45Future of Diesel Hybrids Cont.
- Ford Concept Making Hybrids Sporty and Cool with
a Lithium Ion battery, 65 mpg , All-Wheel Drive,
and a Solar Catching Sun Roof to Power the Lights
46Customize to Hybridize
- California Motors
- Hybrid Powertrain Additions
- Bio-Diesel Hybrid
- There is a natural compliment between the
properties of a diesel engine and the properties
of an electric motor. Working together these two
propulsion methods create an optimal system for
moving large mass with quick acceleration and
maximum fuel efficiency. Military implementations
have yielded not only maximum performance, but
also stealthy operation in combat scenarios.
Hybrid Buses and shuttles benefit tremendously
given their frequent stops and starts.
http//www.calmotors.com/
47This Just In
- Zytek
- Standard vehicle Zytek dual mode hybrid Fuel
economy (Urban) 5.9l/100km, 47.9 mpg No fuel used
in electric drive - Fuel economy (Combined) 4.6l/100km, 61.4 mpg
3.2l/100km, 88mpg (corrected to charge neutral,
ie with no net change in battery state of charge) - Overall CO2 (Tank-wheel) 121g/km 85g/km
Acceleration 0-100kph 15.53s Under 12s (about
0-60)
48This Just In Cont.
- Plug in
- Dual Mode
- Todays passenger car production hybrids are
either parallel or dual mode systems. Pure series
hybrids offer high efficiency at low speeds but
this greatly reduces as speed increases, and
hence this drivetrain only finds application in
low speed, stop start vehicles such as inner city
buses. Parallel hybrids have the internal
combustion engine permanently coupled to the
wheels so are more efficient at high speeds, but
offer less flexibility to optimise the drive for
low speed duty cycles. - A new generation of dual mode transmissions offer
the ability to operate in series or parallel mode
so the drive can be optimised for each operating
condition, but they are generally more complex
and therefore larger and more expensive. There
are also inevitable compromises in todays
production dual-mode designs. - Zyteks novel solution is a dual-mode hybrid that
eliminates these compromises by using
sophisticated control strategies to replace
clutches and complex epicyclic gearsets. In
addition to the many advantages of dual-mode
operation, this reduces component count,
eliminates wearing friction surfaces, reduces
packaging volume and substantially reduces
manufacturing costs. The design also allows each
motor to be optimised for its function within the
drivetrain.
49This Just In Cont.
- Five Door Competition
- 5,000 Grant from UK Government
50Conclusion
- Less Diesel Consumed, Less Dependant
- Diesel Also Can Use Bio Fuel to Further Reduce
Dependency - Can be Cheaper to Create/Refine Diesel