(Source:  GM’s Fast Lane Blogs, via TreeHugger )

GM Defends the Volt’s Design
A recent Carnegie Mellon University study (pdf) challenged the real-world gasoline savings and cost effectiveness of plug-in hybrids like the Chevy Volt. GM’s Vice President Global Program Management, Jon Lauckner, who has been involved in the Volt project responded on the company’s blog. Find out what he had to say below.

All-Electric Range

The first thing is the electric range of the car. Somewhat strangely, the CMU study found that “for urban driving conditions and frequent charges every 10 miles or less, a low-capacity PHEV sized with an AER (range) of about 7 miles would be a robust choice for minimizing gasoline consumption, cost and greenhouse gas emissions.”

7 miles? Really?

Well, Jon Lauckner responds:

I’ll cut to the chase; for starters, the study’s endorsement of plug-in vehicles with only a “token” electric-only range (seven miles) overlooks the inconvenience of recharging for the vast majority of drivers (approx. 90 percent) with a daily commute that exceeds seven miles. I mean, honestly, how many customers are going to stop every seven miles and wait at least 30 minutes (if a car has a high-capacity charger like the Volt with the same level of electrical energy to match it) for their battery to be recharged? […] And, if customers don’t recharge during the day, these “token” plug-ins will run primarily on gasoline. How is that consistent with reducing green house gas emissions and our dependence on petroleum?

Click here to read the entire article.

(Source: Carnegie Mellon University Design Decisions Laboratory)

PITTSBURGH— Carnegie Mellon University professor Jeremy J. Michalek and researchers Dr. Constantine Samaras and C.-S. Norman Shiau report in a new study that plug-in hybrid electric vehicles with small battery packs may be the best bet for saving drivers money while addressing U.S. dependency on foreign oil and global warming.

            In an article to appear in the journal Energy Policy, the authors find that urban drivers who can charge their vehicles frequently (every 20 miles or less) can simultaneously reduce petroleum consumption, greenhouse gas emissions, and expenses with a plug-in hybrid vehicle whose battery pack is sized for about 7 miles of electric travel per charge. In contrast, plug-in hybrid vehicles with large battery packs – sized for 40 or more miles of electric travel – are too expensive for fuel savings to compensate, even in optimistic scenarios.

            Plug-in hybrid vehicles use charged batteries to propel the vehicle partly using electricity instead of gasoline, which gives them potential to reduce petroleum consumption and greenhouse gas emissions. “Larger battery packs allow drivers to go longer distances on electric power. But batteries are heavy and expensive,” says Michalek. “We accounted for the effects of additional batteries on vehicle cost, weight and efficiency in order to understand the net implications on petroleum consumption, cost, and greenhouse gas emissions. Over a range of scenarios — including fluctuating gas prices, new battery technologies or high taxes on carbon dioxide emissions — plug-ins with small battery packs are economically competitive with ordinary hybrid and conventional vehicles for drivers who charge frequently.”

Click here to entire press release.

(Source:  Google.org)

RechargeIT is a Google.org initiative that aims to reduce CO2 emissions, cut oil use, and stabilize the electrical grid by accelerating the adoption of plug-in electric vehicles. We have a demonstration fleet of plug-ins at our headquarters in Mountain View, and we’re collecting and posting data on plug-in performance, investing in innovative technologies, and advocating for the passage of important legislation. Our vision is that one day thousands of cars will be plugging into a greener grid.

We’ve had our RechargeIT plug-ins on the road for about a year now, collecting data when driven by Google employees in our free car-share program. But we wanted to see how they would perform in a controlled test. The results of our seven-week driving experiment are in – and the plug-ins did great, getting as much as 93 MPG average across all trips, and 115 MPG for city trips! See the full results to explore detailed data from the experiment. (And check back often as we’ll be posting even more comprehensive data from our test over the next few weeks.)

RechargeIT Driving Experiment

Electricity usage for plug-in vehicles: 
Ford Escape Plug-In 133.2 Wh/mi, Toyota Prius Plug-in 139.6 Wh/mi

Click here to explore this on-going Google Initiative.

(Source:  Seattle Times)

Remember last spring, when Seattle’s mayor rolled out the city’s first car that could be “filled at the plug instead of the pump?”

It’s called a plug-in hybrid. They are all the green rage — “possibly the most sought-after technological innovation since Captain Kirk first flipped open his communicator,” says The New York Times.

You may have seen the city’s cars around town, painted with an eye-catching claim on the rear bumper: “This plug-in hybrid gets 100+mpg.”

Also, a greener boast: “150+City MPG!”

Not exactly, it turns out. Not even close.

Try 51 miles per gallon, city and highway combined. Not counting the cost of the electricity.

It’s what 14 plug-in Priuses averaged after driving a total of 17,636 miles. The pilot project is one of the few in the nation to subject plug-in hybrid cars to regular motor-pool duty, as opposed to being driven by hypermilers or alt-energy enthusiasts.

Click here to read the entire article.