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Mack Granite CNG truck exclusively equipped with Allison’s 4500 Rugged Duty Series transmission

Green Car Congress

Mack Trucks, one of North America’s largest producers of heavy-duty trucks, has selected the Allison 4500 Rugged Duty Series (RDS) as the exclusive transmission currently offered for its new compressed natural gas (CNG)-powered Mack Granite model. We are pleased to partner with Mack on this sustainability initiative.

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EPA Trends on EVs and PHEVs; beginning of a “measurable and meaningful impact” on new vehicle fuel economy and emissions

Green Car Congress

The agency’s reasoning was that since alternative fuel vehicle production has generally been less than 0.1% of total vehicle production until very recently, the impact of excluding alternative fuel vehicles was negligible. Fuel economy average for the US fleet, per the Trends report, is 24.1

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Cummins to begin electrified powertrain delivery in 2019; alternative fuels and power, digitalization

Green Car Congress

executives outlined plans to provide a range of power technologies spanning diesel and natural gas engines to fully electric and hybrid powertrains. Cummins currently delivers zero emissions natural gas engine systems that are a great fit for urban areas addressing air quality issues and requirements. Digitalization, data & analytics.

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MIT study finds fuel economy standards are 6-14 times less cost effective than fuel tax for reducing gasoline use

Green Car Congress

In a study published in the journal Energy Economics , MIT researchers have found that a fuel economy standard is at least six to fourteen times less cost effective than a fuel tax when targeting an identical reduction in cumulative gasoline use (20% by 2050). —Karplus et al. Paltsev, M. Babiker, J.M. 2012.09.001.

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US EPA rates Nissan LEAF fuel economy as 99 mpg-equivalent (combined); 73-mile range

Green Car Congress

The new fuel economy label also notes consumption of 34 kWh per 100 miles. EPA fuel economy label for the LEAF. The label also puts the LEAF as best in the mid-size car class in terms of fuel economy, greenhouse gas emissions, and emissions of criteria pollutants. Click to enlarge.

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Exploring the effects of CR, EGR and spark timing on performance and emissions of HD natural gas engines

Green Car Congress

Researchers at Hunan University have investigated the effects of compression ratio (CR), EGR and spark timing strategies on performance, combustion and NO x emissions of a heavy-duty natural gas engine fueled with 99% methane content. A paper on their work is published in the journal Fuel. —Li et al. 2019.115803.

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EPA trends report sees record levels of average new vehicle fuel economy and CO2 emissions for MY 2012; role of new gasoline vehicle technologies

Green Car Congress

MY 2012 adjusted fuel economy is 23.6 mpg fuel economy improvement from MY 2011 to MY 2012 is the second largest annual improvement in the last 30 years. l/100 km) fuel economy, which, if achieved, will again represent all-time records. Click to enlarge. l/100 km), which is 1.2 mpg, or 22%. Click to enlarge.