Diesel auto-stop article

bwilson4web · Sep 22, 2010

Diesels challenge hybrids for efficiency, low emissions

. . .
What we often forget, especially here in the U.S., is that fuel efficiency and low emissions are not only achieved via revolutionary game-changing technologies like the emission-free electric powertrain of a hybrid vehicle. Looking at the fuel efficiency of currently available or shortly announced HEVs, you would be surprised that this fuel efficiency can be pretty closely matched by a modern diesel engine using state-of-the-art direct fuel injection systems and an electronically controlled and well optimized motor control unit. The big difference comes with the price "bump up" for the technology that the buyer pays.
. . .
Only the pure city consumption of the HEVs seems to be superior since the HEV-engine typically shuts down (so called start-stop mode) every time the car is stopped in a traffic jam or at red lights. But adding relatively low cost start-stop functionality to a regular diesel engine (so called micro-hybrid) would push the diesel city mileage likely into the same range as the one advertised for gasoline-HEVs. . . .
Click to expand...

More of an engineering magazine, I added my comments to their thread after someone suggested auto-stop the diesel.

Enjoy,
Bob Wilson

usbseawolf2000 · Sep 22, 2010

Micro-hybrid would have very limited regen brake and it can't crawl through traffic jams without a burst of combustion. How about A/C? The diesel engine will need to run then.

For emission, NOx is a couple of order of magnitude higher than a full hybrid with Atkinson cycle ICE.

Diesel auto-stop article

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Diesel auto-stop article

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