So, to avoid people having to learn a little physics and actually
understanding how their car worked, they designed a tag that's confusing
people and does't represent reality.... I could have predicted that.... :0
On Fri, Jan 7, 2011 at 1:38 AM, Bruce Parmenter <[email protected]>wro=
te:
>
> http://www.lvrj.com/drive/car-jargon-what-is-mpge-112707114.html?ref=3D114
> Wondering what MPGe means? by STAN HANEL PLUGGED IN Dec 31 2010
> ... comparing fuel efficiency and overall energy usage between
> [plug-in] hybrids and conventional gasoline-powered vehicles is
> tricky, since plug-in electric hybrids refuel from both electric and
> gasoline sources. To address this, the EPA now measures the distance
> traveled by each new vehicle relative to each unit of energy consumed.
> The new energy-consumption standard is called "miles per gallon
> equivalent," or MPGe.
>
> MPGe allows competing vehicle platforms to be compared by defining
> distance traveled in miles, divided by the amount of energy units
> consumed. This performance is then compared to the equivalent energy
> available in a gallon of gasoline.
>
> As an example, the Nissan Leaf is a car with an electric motor that
> is propelled by a battery pack. The equivalent energy usage for miles
> traveled compared to a gasoline vehicle is 99 MPGe, even though the
> Leaf will never consume an ounce of gasoline. Unlike gasoline
> vehicles, the electric Nissan Leaf is recharged from an electrical
> outlet. It will perform better in the city (106 MPGe) than on the
> highway (92 MPGe) because it consumes no energy when stopped at
> traffic stoplights. This EPA information will be featured on the
> Monroney window sticker for the Nissan Leaf when it is rolled out in
> 2011.
>
> MPGe compares the energy in one gallon of gasoline to an equivalent
> 33.7 kilowatt-hours of electrical energy stored in the vehicle's
> battery pack. A "watt" is a measurement unit that shows how much
> electric power can be delivered by a battery pack to drive an
> electric motor. A "kilowatt" measures electric power in 1,000-watt
> increments. A "kilowatt-hour" measures electrical energy in the
> battery pack by showing how long it can deliver this power
> continuously over time.
>
> The kilowatt-hour is used to show the amount of electrical energy
> stored in a battery pack, in the same way that gallons of gasoline
> are used as a unit of measurement for the relative volume of fuel
> stored in a gasoline tank. For example, the Nissan Leaf will employ
> a battery pack with a 24 kilowatt-hour capacity that can deliver 24
> kilowatts of power to the electric motor over one hour, 12 kilowatts
> of power over two hours, six kilowatts of power over four hours, or
> three kilowatts of power over eight hours depending on driving
> conditions, acceleration, temperature and speed.
>
> Even though the potential energy in the Nissan Leaf battery pack is
> less than one gallon of gas (24 kilowatt-hours compared to 33.7
> kilowatt-hours), an electric-motor drive train converts this energy to
> propulsion power at the wheels with an efficiency that is three to
> four times greater than a gasoline engine. Much of the potential
> energy consumed by an internal combustion engine is lost as waste
> heat through the exhaust pipes and engine block.
>
> Nevertheless, a 10-gallon tank of gasoline with the equivalent of 337
> kilowatt-hours of potential energy can propel most of today's internal
> combustion engine cars about 300 miles between fill-ups. By
> comparison, the Monroney sticker on the Nissan Leaf shows that it
> will need to be recharged about every 73 miles under practical
> driving conditions.
>
> Another factor influencing a purchasing decision is cost of ownership
> over time, including the price of the energy to replenish the
> vehicle's propulsion system. Electricity costs significantly less than
> gasoline to propel a vehicle and this gap will widen if the price of
> gasoline continues to rise. The annual cost to purchase the energy
> needed to recharge the Nissan Leaf, if driving it 15,000 miles per
> year, is forecast to be about $561 at 12 cents per kilowatt-hour ...
> [=A9 Stephens Media LLC 1997 - 2011]
> ...
> http://articles.latimes.com/2010/dec/12/business/la-fi-ev-ratings-20101212
> Electric vehicles may bring new sticker shock: multiple mileage ratings
> How do you gauge fuel economy when there's no gasoline?
> Government agencies can't agree By Tiffany Hsu Dec 12 2010
> According to the government, the car with the highest mileage per
> gallon on the market doesn't use a single drop of gasoline.
>
> The 2011 Nissan Leaf, which was scheduled to be delivered to its
> first California customers this weekend, runs entirely on battery. But
> the Environmental Protection Agency says it can travel 99 miles on the
> equivalent of a single gallon of fuel.
>
> Confused? You're not alone. The mileage-equivalent ratings, meant to
> help potential buyers compare electric cars with others in their
> class, are befuddling some consumers who see them as an automotive
> example of comparing apples and oranges. And that's just one of the
> conundrums shoppers will face when more electric vehicles begin
> arriving in showrooms this month.
>
> The EPA isn't the only entity comparing the clean-fuel cars with autos
> that have traditional internal combustion engines. Their ratings,
> which will be posted on car windows, may end up sharing space with
> stickers from the Federal Trade Commission and the automakers
> themselves.
>
> That's some crowded glass.
> "It's a whole new world that needs to be rated," Nissan spokeswoman
> Jeannine Ginivan said. "It is for sure complicated, since there is
> really no gallon. For now, the consumer is going to have to decipher
> everything and see how to make it work for them."
>
> Traditionally, the fuel economy rating for vehicles with internal
> combustion engines is calculated from emissions generated during a
> series of tests.
>
> Things got hairy with the Leaf. The EPA worked out a formula in which
> an electric car using 33.7 kilowatt-hours of electricity was
> considered equivalent to a standard vehicle using a gallon of
> gasoline. Because there wasn't any physical fuel, the rating was
> renamed miles-per-gallon-equivalent, or mpge.
>
> The electric vehicle will be sold with a sticker saying that it can
> reach up to 106 mpge in the city. The previous record-holder, the
> Toyota Prius hybrid, was rated at 51 mpg in urban settings.
>
> The Leaf score is straightforward compared with the one given to the
> 2011 Chevrolet Volt, a hybrid plug-in that switches to gasoline when
> its electricity supply runs out.
>
> The Volt doesn't just have an overall rating. In addition to an
> umbrella figure of 60 mpge, the government gave it a 93-mpge rating
> for when the Volt is driven only in its electric mode and a 37-mpg
> figure for when it uses gasoline only. But few if any Volt drivers
> will stick to just one mode. They are more likely to use gas and
> electricity in varying ratios. [Copyright 2011 Los Angeles Times]
> ...
> http://autoblog.xprize.org/axp/2009/08/calculating-mpge.html
> Calculating MPGe
> ...
> http://www.docstoc.com/docs/10174594/MPGe-Calculator
> MPGe-Calculator
> ...
> http://en.wikipedia.org/wiki/Monroney_sticker
> Monroney sticker
>
>
>
>
>
>
> http://electric-vehicle-discussion-list.413529.n4.nabble.com/Why-the-plug=
-in-push-DoE-quot-resident-expert-quot-yaks-EV-facts-td3178193.html
>
> {brucedp.150m.com}
>
>
>
>
>
> _______________________________________________
> | REPLYING: address your message to [email protected] only.
> | Multiple-address or CCed messages may be rejected.
> | UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub
> | OTHER HELP: http://evdl.org/help/
> | OPTIONS: http://lists.sjsu.edu/mailman/listinfo/ev
>
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| REPLYING: address your message to [email protected] only.
| Multiple-address or CCed messages may be rejected.
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understanding how their car worked, they designed a tag that's confusing
people and does't represent reality.... I could have predicted that.... :0
On Fri, Jan 7, 2011 at 1:38 AM, Bruce Parmenter <[email protected]>wro=
te:
>
> http://www.lvrj.com/drive/car-jargon-what-is-mpge-112707114.html?ref=3D114
> Wondering what MPGe means? by STAN HANEL PLUGGED IN Dec 31 2010
> ... comparing fuel efficiency and overall energy usage between
> [plug-in] hybrids and conventional gasoline-powered vehicles is
> tricky, since plug-in electric hybrids refuel from both electric and
> gasoline sources. To address this, the EPA now measures the distance
> traveled by each new vehicle relative to each unit of energy consumed.
> The new energy-consumption standard is called "miles per gallon
> equivalent," or MPGe.
>
> MPGe allows competing vehicle platforms to be compared by defining
> distance traveled in miles, divided by the amount of energy units
> consumed. This performance is then compared to the equivalent energy
> available in a gallon of gasoline.
>
> As an example, the Nissan Leaf is a car with an electric motor that
> is propelled by a battery pack. The equivalent energy usage for miles
> traveled compared to a gasoline vehicle is 99 MPGe, even though the
> Leaf will never consume an ounce of gasoline. Unlike gasoline
> vehicles, the electric Nissan Leaf is recharged from an electrical
> outlet. It will perform better in the city (106 MPGe) than on the
> highway (92 MPGe) because it consumes no energy when stopped at
> traffic stoplights. This EPA information will be featured on the
> Monroney window sticker for the Nissan Leaf when it is rolled out in
> 2011.
>
> MPGe compares the energy in one gallon of gasoline to an equivalent
> 33.7 kilowatt-hours of electrical energy stored in the vehicle's
> battery pack. A "watt" is a measurement unit that shows how much
> electric power can be delivered by a battery pack to drive an
> electric motor. A "kilowatt" measures electric power in 1,000-watt
> increments. A "kilowatt-hour" measures electrical energy in the
> battery pack by showing how long it can deliver this power
> continuously over time.
>
> The kilowatt-hour is used to show the amount of electrical energy
> stored in a battery pack, in the same way that gallons of gasoline
> are used as a unit of measurement for the relative volume of fuel
> stored in a gasoline tank. For example, the Nissan Leaf will employ
> a battery pack with a 24 kilowatt-hour capacity that can deliver 24
> kilowatts of power to the electric motor over one hour, 12 kilowatts
> of power over two hours, six kilowatts of power over four hours, or
> three kilowatts of power over eight hours depending on driving
> conditions, acceleration, temperature and speed.
>
> Even though the potential energy in the Nissan Leaf battery pack is
> less than one gallon of gas (24 kilowatt-hours compared to 33.7
> kilowatt-hours), an electric-motor drive train converts this energy to
> propulsion power at the wheels with an efficiency that is three to
> four times greater than a gasoline engine. Much of the potential
> energy consumed by an internal combustion engine is lost as waste
> heat through the exhaust pipes and engine block.
>
> Nevertheless, a 10-gallon tank of gasoline with the equivalent of 337
> kilowatt-hours of potential energy can propel most of today's internal
> combustion engine cars about 300 miles between fill-ups. By
> comparison, the Monroney sticker on the Nissan Leaf shows that it
> will need to be recharged about every 73 miles under practical
> driving conditions.
>
> Another factor influencing a purchasing decision is cost of ownership
> over time, including the price of the energy to replenish the
> vehicle's propulsion system. Electricity costs significantly less than
> gasoline to propel a vehicle and this gap will widen if the price of
> gasoline continues to rise. The annual cost to purchase the energy
> needed to recharge the Nissan Leaf, if driving it 15,000 miles per
> year, is forecast to be about $561 at 12 cents per kilowatt-hour ...
> [=A9 Stephens Media LLC 1997 - 2011]
> ...
> http://articles.latimes.com/2010/dec/12/business/la-fi-ev-ratings-20101212
> Electric vehicles may bring new sticker shock: multiple mileage ratings
> How do you gauge fuel economy when there's no gasoline?
> Government agencies can't agree By Tiffany Hsu Dec 12 2010
> According to the government, the car with the highest mileage per
> gallon on the market doesn't use a single drop of gasoline.
>
> The 2011 Nissan Leaf, which was scheduled to be delivered to its
> first California customers this weekend, runs entirely on battery. But
> the Environmental Protection Agency says it can travel 99 miles on the
> equivalent of a single gallon of fuel.
>
> Confused? You're not alone. The mileage-equivalent ratings, meant to
> help potential buyers compare electric cars with others in their
> class, are befuddling some consumers who see them as an automotive
> example of comparing apples and oranges. And that's just one of the
> conundrums shoppers will face when more electric vehicles begin
> arriving in showrooms this month.
>
> The EPA isn't the only entity comparing the clean-fuel cars with autos
> that have traditional internal combustion engines. Their ratings,
> which will be posted on car windows, may end up sharing space with
> stickers from the Federal Trade Commission and the automakers
> themselves.
>
> That's some crowded glass.
> "It's a whole new world that needs to be rated," Nissan spokeswoman
> Jeannine Ginivan said. "It is for sure complicated, since there is
> really no gallon. For now, the consumer is going to have to decipher
> everything and see how to make it work for them."
>
> Traditionally, the fuel economy rating for vehicles with internal
> combustion engines is calculated from emissions generated during a
> series of tests.
>
> Things got hairy with the Leaf. The EPA worked out a formula in which
> an electric car using 33.7 kilowatt-hours of electricity was
> considered equivalent to a standard vehicle using a gallon of
> gasoline. Because there wasn't any physical fuel, the rating was
> renamed miles-per-gallon-equivalent, or mpge.
>
> The electric vehicle will be sold with a sticker saying that it can
> reach up to 106 mpge in the city. The previous record-holder, the
> Toyota Prius hybrid, was rated at 51 mpg in urban settings.
>
> The Leaf score is straightforward compared with the one given to the
> 2011 Chevrolet Volt, a hybrid plug-in that switches to gasoline when
> its electricity supply runs out.
>
> The Volt doesn't just have an overall rating. In addition to an
> umbrella figure of 60 mpge, the government gave it a 93-mpge rating
> for when the Volt is driven only in its electric mode and a 37-mpg
> figure for when it uses gasoline only. But few if any Volt drivers
> will stick to just one mode. They are more likely to use gas and
> electricity in varying ratios. [Copyright 2011 Los Angeles Times]
> ...
> http://autoblog.xprize.org/axp/2009/08/calculating-mpge.html
> Calculating MPGe
> ...
> http://www.docstoc.com/docs/10174594/MPGe-Calculator
> MPGe-Calculator
> ...
> http://en.wikipedia.org/wiki/Monroney_sticker
> Monroney sticker
>
>
>
>
>
>
> http://electric-vehicle-discussion-list.413529.n4.nabble.com/Why-the-plug=
-in-push-DoE-quot-resident-expert-quot-yaks-EV-facts-td3178193.html
>
> {brucedp.150m.com}
>
>
>
>
>
> _______________________________________________
> | REPLYING: address your message to [email protected] only.
> | Multiple-address or CCed messages may be rejected.
> | UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub
> | OTHER HELP: http://evdl.org/help/
> | OPTIONS: http://lists.sjsu.edu/mailman/listinfo/ev
>
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| REPLYING: address your message to [email protected] only.
| Multiple-address or CCed messages may be rejected.
| UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub
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