FreeDuck wrote:Anybody know what an off-road deisel engine is. Bush said their emissions were being cut by the clear skies act.
Off-road use diesel engines like in bulldozers, farm tractors and that type of equipment haven't had to meet the emission standards of road going vehicles although diesel fuel has been reformulated on an on going basis to reduce the amount of sulphur content etc., off-road engines are the next tier to be required to meet cleaner standards.
As of right now off-road diesel engines use a higher sulphur content fuel than on-road, it's a government tax issue mostly, off-road diesel fuel doesn't have road taxes etc. tacked on. Not really sure why they chose the two diesel formulas...I have a feeling it was a concession to manufacturers of the engines as in saving them the expense of developing the cleaner burning versions.
There aren't as many of these type vehicles in operation but still quite a lot. Diesel engines emit more particulates into the air, if you've noticed way more smoke comes out of the exhaust pipes on a diesel powered vehicle, that's where reformulating the fuel comes into play.
So when a bill is signed into law that requires a cleaner burn, a set of specifications have to be formulated and and sent to the manufacturers of diesel engines and fuel makers so they can acheive the desired result in concert.
The next tier will prolly be 2-cycle engines which are found on chainsaw's, motorcycles and boats etc. These operate on a fuel mixture of gasoline and oil so it's practically impossible to acheive a clean burn with them.
I wouldn't be surprised if 2-cycle engines aren't phased out completely in the next few years.