Cummins/Tula dDSF (diesel Dynamic Skip Fire)
I have been watching this study for a while along with the Cummins ETREE project that replaced an ISB 6.7L with an ISB 4.5L hooked up to a 130kW generator pushing a 175kW motor that netted over 60% be...
Forum Discussion
Groover wrote:
A 4.5l in a class 8?! Or have mixed in information from different tests? Either way, I like the concept for a motorhome if the 4.5l can be made quiet enough to be acceptable for use a generator in a campground. Having separate engines for propulsion and generator in a motorhome complicates a lot of things and adds a lot of weight.
I spoke with a high level person at Thor recently and he told me that there was something like this in the works.
The article doesn't mention use a hybrid but could add a lot to the versatility of the drivetrain.
I don't understand how they increased fuel economy 20% but only reduced CO2 emissions 5% though.
The ISB 4.5L was in a class 6 cab-over truck. You can find more info on that study here.
Cummins ETREE Final Report
Diesel engines already emit less Co2 than an equivalent gas engine even without emissions equipment so I doubt you will see much improvement there. It is NOx that they emit more of and cannot be reduced with a catalytic converter like a gas engine due to a diesel's lean air/fuel ratios. It would ruin a catalytic converter very quickly.
