Does minimum emissions = maximum efficiency?
Posted: 14 Jun 2015, 16:39
Been thinking about this one, possibly too much!
At his MoT Vinnie ( 1.9 DG) had to have his mixture tweaked to bring the emissions down within limits. If I cast my mind back to uni, nasty emissions like CO are a result of incomplete combustion, so if the emissions are lower, then the combustion of the air/fuel mixture must be more efficient in converting its calorific value to mechanical power and not leaving uncombusted waste by-products.
If that was the case, then Vinnie would now be running better than ever as he's extracting more energy from the fuel, but he seems down on torque on hills, and the MoT guy mentioned the mixture may need tweaked back because he was struggling to blow the skin off a rice pudding. My calculated mpg has also dropped a little, so clearly efficient does not equal power, so what am I missing?
Rob
At his MoT Vinnie ( 1.9 DG) had to have his mixture tweaked to bring the emissions down within limits. If I cast my mind back to uni, nasty emissions like CO are a result of incomplete combustion, so if the emissions are lower, then the combustion of the air/fuel mixture must be more efficient in converting its calorific value to mechanical power and not leaving uncombusted waste by-products.
If that was the case, then Vinnie would now be running better than ever as he's extracting more energy from the fuel, but he seems down on torque on hills, and the MoT guy mentioned the mixture may need tweaked back because he was struggling to blow the skin off a rice pudding. My calculated mpg has also dropped a little, so clearly efficient does not equal power, so what am I missing?
Rob