Heavy-duty engine manufacturers will measure exhaust emissions on model year 2005 and 2006 trucks and buses to determine how the emissions control system is working. The results will be the basis on whether the program will become a regulatory requirement for model year 2007....
Well-to-Wheels Energy Use and Greenhouse Gas Emissions of Plug-In Hybrid Electric Vehicles Using GREET Phase II Analysis, Argonne National Lab 热度: iRECIST guidelines for response criteria for use in trials testing immunotherapeutics 热度:
Though the law will require emissions testing of all diesel vehicles, from tractor trailers to excursion buses, it will have no effect on sport utility vehicles, almost all of which are gasoline powered, and will not be sub- jected to emissions-control standards as stringent as they are for ...
Testing of a Heavy Heavy-Duty Diesel Engine Schedule for Representative Mea- surement of Emissions; J. Air & Waste Manage. Assoc. 2009, 59, 960- 971; doi: 10.3155/1047-3289.59.8.960.Bedick C.; Clark N.; Zhen F.; Atkinson R.; McKain D. Testing of a Heavy Heavy-Duty Diesel Engine...
The revelations let to unwanted scrutiny for the EPA. Its testing procedures have been criticized for being predictable and outdated, making it relatively easy for VW to cheat. What's more, the EPA did not initially uncover the problem; researchers at West Virginia University did, using on-road...
to reduce the price advantages of diesel over gasoline. In addition, diesel fuel emits morecarbon dioxideper unit than gasoline, offsetting some of itsefficiencybenefits with itsgreenhouse gasemissions. Several grades of diesel fuel are manufactured—for example, “light-middle” and “middle” ...
Moreover, it was found that NOx emissions decrease significantly by using a pre-positioned dual SCR after-treatment system. And, the closer the SCR is to the engine, the higher the NOx conversion efficiency becomes. As the SCR's position is adjusted, the rate of NOx removal stabilizes, ...
The significance testing using ANOVA was carried out to validate the models after establishing the use of the RSM. If p-values were less than 0.05, as given in Table 6, the model terms were assumed to be significant and hence were able to describe 95% of the variability of the response,...
Reuters cited Volkswagen as saying the EA288 engine did not have a "defeat" device to beat emissions testing. We will update with new information as it becomes available. General Motors and Toyota had their massive scandals. Now it’s Volkswagen’s turn. The company, which owns 70 per...
The original trainset, the Zephyr 9900, made headlines in 1934 when it completed a non-stop journey from Denver to Chicago in a little over 13 hours. Electro-Motive continues to produce locomotives today but in name only; the company is now a division of Progress Rail, a Caterpillar ...