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New supersonic transport aircraft: Fuel burn parity, or environmental parody?

In 2016, Sir Richard Branson, president of Virgin Atlantic Airways, announced that the Virgin Group would assist aviation start-up Boom in developing a new supersonic transport (SST) aircraft.  Boom...Boom Technologies' CEO claims the company's proposed supersonic aircraft's fuel burn will be on par with subsonic business-class travel. Will it?
Published 2018.09.28: Blog Post

Why efficiency technology still matters in China

On September 5, 2018, six years after its retreat from the U.S. car market., the Suzuki Motor Corp. officially pulled out of China. As stated by Suzuki’s Chairman, the consumer shift in China towards...Until BEVs are able to meet the needs of mainstream vehicle market in China, manufacturers are continuing to develop advanced efficiency technologies for use in conventional vehicles. 
Published 2018.09.17: Blog Post

Practical lessons in vehicle efficiency policy: The 10-year evolution of France's CO2-based bonus-malus (feebate) system

As we've pointed out in the past (for example, here and here), feebate systems can be an effective policy tool for promoting vehicle efficiency and reducing both fuel consumption and CO2 emissions....Feebate systems can be an effective policy tool for promoting vehicle efficiency. A change that France made recently to its feebate system illustrates the absolute best way to do things, while a look...
Published 2018.03.12: Blog Post

Like magic! How to make high vehicle CO2 emissions simply disappear

Ask people on the streets in Germany who they think is the most famous magician ever, and the name you would probably hear most is David Copperfield. Almost everyone knows him and is fascinated by...On June 26, the BMVI finally published the CO2 measurement results we had been waiting for. But in the interim the Ministry re-tested 29 of the original vehicle models. Only a subset of those results...
Published 2017.07.03: Blog Post

The future of vehicle emissions testing in Europe (and beyond)

At the ICCT we have been analyzing the growing gap between official and real-world vehicle fuel consumption and CO2 emissions of passenger cars in Europe for a few years now. We showed for the first...To solve the problem underlying the growing gap between certification-test and in-use CO2 and NOx emissions, we will have to go beyond just introducing a new test procedure.
Published 2015.11.23: Blog Post

Dispelling some myths about the gap between test-lab and real-world vehicle CO2 emissions

We've just released the annual update to our From Laboratory to Road series, which documents the growing gap between official, or type-approval, CO2 emissions from passenger cars in Europe and their...An explanation of what has and has not caused the gap between test-lab and real-world vehicle CO2 emissions to increase by over 30 percentage points in just over a decade.
Published 2015.09.30: Blog Post

China still lagging on fuel consumption in 2014

Following the timeline determined in the Corporate Average Fuel Consumption (CAFC) accounting rule, China's Ministry of Industry and Information Technology (MIIT) released its 2014 CAFC report in...With an average fuel consumption of 7.22 L/100km for the 2014 passenger vehicle fleet, will China be able to meet the national fuel consumption goal of 6.9 L/100km in 2015?
Published 2015.09.18: Blog Post

Improving the conversions between the various passenger vehicle fuel economy/CO2 emission standards around the world

Most governments of countries (or, in the case of the European Union, regions) with large auto markets regulate passenger vehicle fuel efficiency or CO2 emissions (essentially the same thing, since...We've updated our comparison of passenger vehicle fuel-efficiency standards worldwide, improving the test cycle conversion factors used to translate the standard values among the different...
Published 2014.12.03: Blog Post

Bending the law of diminishing returns on fuel economy

Larry Vellequette had an interesting column about diminishing returns from vehicle efficiency technologies in the July 11, 2014 Automotive News. He was commenting on the chart below showing annual...On fuel economy, what matters is the cost of adding technology compared with the fuel savings it delivers. And all the evidence points to technology costs falling fast enough to keep pace with the...
Published 2014.07.21: Blog Post

To fine or not to fine? Implementing standards

On May 7, China’s Ministry of Industry and Information Technology (MIIT) released its proposed Enforcement Rule for New Passenger Car Corporate-Average Fuel Consumption Standard for public comment....China’s Ministry of Industry and Information Technology (MIIT) has released its proposed Enforcement Rule for New Passenger Car Corporate-Average Fuel Consumption Standard for public comment. One...
Published 2014.06.25: Blog Post

ICCT对《加强乘用车企业平均燃料消耗量管理》征求意见稿的评论

工业和信息化部于5月7日在其网站上发布了《关于加强乘用车企业平均燃料消耗量管理的通知》(下称《监管办法》提案)并向社会公开征集意见。我们认为《监管办法》是整个乘用车第三阶段(以及以后标准)体系的关键环节,没有监管办法的标准不能称之为完整的标准,对车队油耗水平的改善的效果具有很大不确定性。纵观欧美等发达国家的车辆能效或温室气体排放标准体系,都是将标准值、核算体系、灵活达标机制和监管、...工业和信息化部于5月7日在其网站上发布了《关于加强乘用车企业平均燃料消耗量管理的通知》并向社会公开征集意见。我们认为《监管办法》是整个乘用车第三阶段(以及以后标准)体系的关键环节,没有监管办法的标准不能称之为完整的标准,对车队油耗水平的改善的效果具有很大不确定性。
Published 2014.06.25: Blog Post

China's fuel efficiency standard for cars: On track to meet 2015 goals—as long as enforcement isn't required

As 2014 begins, China is at the midpoint of a four-year phase-in period defined for the passenger car fuel-consumption target the country adopted in 2011. It’s a convenient moment to take stock. Is...China is at the midpoint of a four-year phase-in period for the passenger car fuel-consumption target it adopted in 2011. It's a good time to take stock.
Published 2014.01.17: Blog Post

Of hybrids, metrics, and C-Maxes

The recent spate of news on Ford lowering the mileage rating on its C-Max hybrid (e.g., here and here and here) could lead some to question the in-use fuel economy benefits of hybrids. That would be...The recent spate of news on Ford lowering the mileage rating on its C-Max hybrid could lead some to question the in-use fuel economy benefits of hybrids. That would be a mistake.
Published 2013.08.16: Blog Post

For vehicle fuel efficiency, what you see isn't necessarily what you get

“Kitna deti hai?” How much does it give? It’s one of the most important factors on people’s minds when they purchase a new car, and a prime motivation for car companies to produce ever more fuel-...India should be warned by the growing discrepancy in Europe between type-approval and real-world fuel consumption in cars, and take steps to see that it doesn't wind up in the same situation in 2016.
Published 2013.06.12: Blog Post

Update on “real-world" fuel consumption in European passenger cars

In 2012 ICCT carried out an analysis of “real-world” fuel consumption data in Germany for the years 2001–2010, based on data from the German website spritmonitor.de. This is an online database with...Follow-up on our analysis last year of fuel consumption data contributed by users of spritmonitor.de confirms the original findings—in fact, average discrepancy between user-reported values and the...
Published 2013.02.19: Blog Post

Chart of the day: Gas prices and driving habits

  From the Stanford Visualization Group, based on the New York Times article “Driving Shifts Into Reverse” ( May 2, 2010), data from Energy Information Administration, the Federal Highway...Chart shows, for the United States, miles driven per capita each year versus gasoline prices.
Published 2011.01.22: Blog Post

Fuel consumption vs. fuel economy

Typically, countries that have been more concerned about energy security have chosen to regulate fuel consumption (l/100km) or fuel economy (km/l). Countries/regions more concerned about climate...The metrics of fuel consumption and greenhouse gas emissions have the advantage of being linear.
Published 2010.12.30: Blog Post