Biodiesel is still in limbo here in the U.S., but even if we never return to large scale production, at least diesel vehicles can continue to get cleaner on their own. The latest example of cleaner diesel tech news comes from Finland, where Pegasor Ltd. has introduced a new, compact, continuously operating and real-time particulate matter (PM) sensor, known as PPS-M. Pegasor, which sounds like the name of really bitchin' one-legged T-Rex, says that the sensor can be installed in the engine exhau
When Mercedes-Benz announced their latest batch of diesel engined variants of the E, R, ML and GL class in 2006 they were labeled as forty-five state legal because they didn't yet meet the Tier 2 Bin 5 emissions standards for California and four other states. Unfortunately, for the 2008 model year they also won't be legal in Pennsylvania, Connecticut and Rhode Island because the California standards take effect in those states this year.
By 2010, all diesels sold in the U.S. will have to meet Tier 2 Bin 5 emissions levels, the same standards as their gas-powered counterparts. Even though we're used to talking about diesels as green machines, they still have the issue of nitrous oxide (NOx) emissions with which they need to overcome.
General Motors has decided to go ahead with plans to rework its 6.6L Duramax diesel V8 engine in anticipation of the new Tier 2 Bin 5 emissions standards that will take effect on January 1st. The new standards call for a 90-percent reduction of oxides of nitrogen and particulate matter. Though the changes won't interrupt production of the Chevy Silverado and GMC Sierra heavy-duty pickups in which the engines are used, they will sharply increase the cost of building the engines. GM Powertrain exp