VW Deisel
Thank goodness that no class B's (to my knowledge) use the VW diesel platform! Hopefully, as well, that Mercedes hasn't been playing any dirty tricks with the Sprinter's emissions.:S
Forum Discussion
usually EGR itself won;t much affect MPG.
substituting exhaust gasses for fresh air reduces the combustion chamber temperatures which reduce oxides of nitrogen- essentially displacing air and fuel ( which burn hot, with exhaust gas which is not as hot) so that the cylinder burns less.
the egr is generally active at part-throttle cruising. not during warm up, acceleration or pulling up a hill- high demand.
I think the diff you see above is the 5 and 6 cylinder motors are completely different in design...add in weight, gearing etc.
if works from published figures rather than personal observation...the manufacturer could have changed testing method or forgotten to put tape over all teh door seams and remove the fan belt that turns the alt, water pump etc etc.
so apples to oranges
the more we look at this the more we see how they cheat.
mike
substituting exhaust gasses for fresh air reduces the combustion chamber temperatures which reduce oxides of nitrogen- essentially displacing air and fuel ( which burn hot, with exhaust gas which is not as hot) so that the cylinder burns less.
the egr is generally active at part-throttle cruising. not during warm up, acceleration or pulling up a hill- high demand.
I think the diff you see above is the 5 and 6 cylinder motors are completely different in design...add in weight, gearing etc.
if works from published figures rather than personal observation...the manufacturer could have changed testing method or forgotten to put tape over all teh door seams and remove the fan belt that turns the alt, water pump etc etc.
so apples to oranges
the more we look at this the more we see how they cheat.
mike
