DuckTruck
Well-Known Member
This makes some sense to me as I have a Cadillac ELR and it charges in the same way the Chevy Volt does. When I picked it up in Cincinnati from the dealership, it was fully-charged and ready to go. That charge was gone in the first 35 miles, at which time the engine kicked in. The engine is nothing more than a power generator. As the car detects the depletion of the usable range of the battery, the engine ("Range Extender") kicks in and the vehicle functions much like a diesel-electric locomotive. For the most part, even at top freeway speeds from Cincinnati to Oregon, the engine remained at about 1500 RPM to provide the charge for the battery to turn the wheels.interesting…do you have a link? That’s something that would be interesting to see the info on. Agreed on everything else you said.
For most of that 3,000-mile trip, the engine remained in this 1,500 RPM hold. I can't say RPM range, as it was specifically at 1,500 RPM. For those instances where greater acceleration or speed was needed, especially when climbing the Rockies, the Uintas, the Cascades, and many mountain passes, the "generator" under the hood would switch to about 3,000 RPM, until it detected enough charge to drop back to 1,500.
The funny thing was coming off of freeways occasionally after being under heavy acceleration or climbing a mountain pass, I might come to a complete stop and while sitting at a stop sign or red light, the engine would still be grinding away at 3,000 RPM. Other times, it would be humming away at 1,500, and still others, it would shut off.
The point being, the engine is nothing but a generator, and it has been designed (much like the aforementioned diesel generator) to operate as efficiently as possible in providing electricity for the battery. Consequently, in coming across the country with only about 70 miles of charge from a plug, I averaged over 38 MPG while never failing to take advantage of posted speed limits that might cause many Oregonians to experience nocturnal emissions. In fairness, some of that high MPG outcome is because of the ELR's great aerodynamics and relatively light weight, because the battery is small, but the efficiency of that little 1.4 liter, 84 H.P. generator/engine under the hood is amazing!
Although the thought of charging an EV with a fuel-based generator might seem ludicrous to many, using one (especially the aforementioned diesel unit) may not be so bad for the occasional emergency charge.
So as not to be labeled a hijacker of this thread, I must admit that the ELR easily qualifies as a Mall Cruiser, with an occasional Highway run thrown in for good measure. ?
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