xcel
06-18-2009, 02:04 PM
http://www.cleanmpg.com/photos/data/2/AmericanFlag.jpg Most detailed study to date reveals an 89 percent reductions in NMHC, CO, and PM emissions when compared to the 2007 emission standards. (cleanmpg.com/forums/showthread.php?p=215990)
http://www.cleanmpg.com/photos/data/501/Schneider_-_Freightliner_on_the_road.jpgWayne Gerdes - CleanMPG (cleanmpg.com) - June 18, 2009
Slightly older low to mid-emissions Freightliner Century on the road – Whether using advanced EGR or SCR, diesel truck exhaust emissions are falling dramatically from even 2007 regulated levels.
Boston, MA. -- The most rigorous emissions testing ever done on new heavy-duty diesel engines – which power virtually every large truck and bus sold in the United States – has demonstrated a greater than 90% reduction in most of the pollutants emitted, according to a study released today by the Coordinating Research Council as documented in the Emissions Study (http://www.crcao.org/reports/recentstudies2009/ACES%20Phase%201/ACES%20Phase1%20Final%20Report%2015JUN2009.pdf). For a number of the most important pollutants, these reductions exceeded substantially even those levels required by law. These new engines were developed in response to the US Environmental Protection Agency Heavy-Duty On-Highway Diesel Emissions Rule of 2001 and have been required to be sold in the US since January 2007.
The Advanced Collaborative Emissions Study (ACES) included detailed chemical characterization of exhaust gases emitted from four 2007 model-year heavy heavyduty diesel engines (HHDDE) manufactured by Caterpillar, Cummins, Detroit Diesel, and Volvo found that emissions of fine particulate matter (PM) – a pollutant of significant public health concern – were approximately 99% lower than the PM emission levels allowed from 2004 technology heavy-duty diesel vehicles and engines and 89% lower than even the new 2007 national emissions standards for heavy-duty diesel vehicles (See Figure 1 below). Emissions of carbon monoxide, hydrocarbons, and a number of unregulated, so-called air toxics were also more than 90% lower than the 2004 levels and substantially below required levels. In addition, emissions of NOx were approximately 70% lower than in the past and 10% below required levels. Another approximately 80% reduction in NOx emissions is expected in 2010 when even more stringent emissions regulations will be in place.
Along with a vast reduction in regulated toxins, the study revealed a substantial decline in non-regulated emissions as well.
Unregulated emissions reduction on the 16-hour cycle
Compounds|% Reduction Relative to 2004 Technology Engine
Single Ring Aromatics|82
PAH|79
NitroPAH|81
Alkanes|85
Polar|81
Hopanes/Steranes|99
Carbonyls|98
Inorganic Ions|38
Metals and Elements|98
Organic Carbon|96
Elemental Carbon|99
The Phase 1 ACES study was conducted by the Southwest Research Institute in San Antonio, Texas under the oversight of the CRC. Investigators tested heavy duty diesel engines from the four major manufacturers of these engines, and subjected them to well-established federal test procedures, and to a much more rigorous 16 hour operation cycle designed especially for ACES. The engines were tested on multiple iterations of these cycles, and measurements of over 300 regulated and unregulated air pollutants were made in accordance with the highest laboratory standards.
ACES is a multi-party five year study to test the emissions and health effects of new technology diesel engines to document the improvements that have been made and to ensure that there are no unintended emissions from this new technology. The study is being undertaken by the Health Effects Institute (HEI)2 and the CRC with support from a wide range of government and private sector sponsors, including the US Department of Energy, US Environmental Protection Agency, California Air Resources Board, Engine Manufacturers Association, American Petroleum Institute, and manufacturers of emission control equipment.
Overall design and management of ACES – and all laboratory testing of health effects – is being undertaken under the aegis of HEI. All emissions characterization for ACES is being overseen by CRC. The report issued summarizes the results of Phase 1 – the emissions characterization of representative 2007 model year heavy-duty diesel engines. A second phase to test the 2010 engines is being planned. Detailed short and long term laboratory health testing of emission from one of the four representative engines tested in Phase 1 is getting underway at the Lovelace Respiratory Research Institute in Albuquerque, New Mexico, with initial results expected in 2010.
http://www.cleanmpg.com/photos/data/501/Schneider_-_Freightliner_on_the_road.jpgWayne Gerdes - CleanMPG (cleanmpg.com) - June 18, 2009
Slightly older low to mid-emissions Freightliner Century on the road – Whether using advanced EGR or SCR, diesel truck exhaust emissions are falling dramatically from even 2007 regulated levels.
Boston, MA. -- The most rigorous emissions testing ever done on new heavy-duty diesel engines – which power virtually every large truck and bus sold in the United States – has demonstrated a greater than 90% reduction in most of the pollutants emitted, according to a study released today by the Coordinating Research Council as documented in the Emissions Study (http://www.crcao.org/reports/recentstudies2009/ACES%20Phase%201/ACES%20Phase1%20Final%20Report%2015JUN2009.pdf). For a number of the most important pollutants, these reductions exceeded substantially even those levels required by law. These new engines were developed in response to the US Environmental Protection Agency Heavy-Duty On-Highway Diesel Emissions Rule of 2001 and have been required to be sold in the US since January 2007.
The Advanced Collaborative Emissions Study (ACES) included detailed chemical characterization of exhaust gases emitted from four 2007 model-year heavy heavyduty diesel engines (HHDDE) manufactured by Caterpillar, Cummins, Detroit Diesel, and Volvo found that emissions of fine particulate matter (PM) – a pollutant of significant public health concern – were approximately 99% lower than the PM emission levels allowed from 2004 technology heavy-duty diesel vehicles and engines and 89% lower than even the new 2007 national emissions standards for heavy-duty diesel vehicles (See Figure 1 below). Emissions of carbon monoxide, hydrocarbons, and a number of unregulated, so-called air toxics were also more than 90% lower than the 2004 levels and substantially below required levels. In addition, emissions of NOx were approximately 70% lower than in the past and 10% below required levels. Another approximately 80% reduction in NOx emissions is expected in 2010 when even more stringent emissions regulations will be in place.
Along with a vast reduction in regulated toxins, the study revealed a substantial decline in non-regulated emissions as well.
Unregulated emissions reduction on the 16-hour cycle
Compounds|% Reduction Relative to 2004 Technology Engine
Single Ring Aromatics|82
PAH|79
NitroPAH|81
Alkanes|85
Polar|81
Hopanes/Steranes|99
Carbonyls|98
Inorganic Ions|38
Metals and Elements|98
Organic Carbon|96
Elemental Carbon|99
The Phase 1 ACES study was conducted by the Southwest Research Institute in San Antonio, Texas under the oversight of the CRC. Investigators tested heavy duty diesel engines from the four major manufacturers of these engines, and subjected them to well-established federal test procedures, and to a much more rigorous 16 hour operation cycle designed especially for ACES. The engines were tested on multiple iterations of these cycles, and measurements of over 300 regulated and unregulated air pollutants were made in accordance with the highest laboratory standards.
ACES is a multi-party five year study to test the emissions and health effects of new technology diesel engines to document the improvements that have been made and to ensure that there are no unintended emissions from this new technology. The study is being undertaken by the Health Effects Institute (HEI)2 and the CRC with support from a wide range of government and private sector sponsors, including the US Department of Energy, US Environmental Protection Agency, California Air Resources Board, Engine Manufacturers Association, American Petroleum Institute, and manufacturers of emission control equipment.
Overall design and management of ACES – and all laboratory testing of health effects – is being undertaken under the aegis of HEI. All emissions characterization for ACES is being overseen by CRC. The report issued summarizes the results of Phase 1 – the emissions characterization of representative 2007 model year heavy-duty diesel engines. A second phase to test the 2010 engines is being planned. Detailed short and long term laboratory health testing of emission from one of the four representative engines tested in Phase 1 is getting underway at the Lovelace Respiratory Research Institute in Albuquerque, New Mexico, with initial results expected in 2010.