On May 31, 2015, at 1:17 PM, Jay Summet via EV <[email protected]> wrote:
> One place where Lithium may work better over Lead is for instant/auto > start/stop applications. I would think that such systems will have a relatively short life in the design studios. If you've got an hybrid of any flavor, the electric traction motor is going to be far more effective at starting the ICE motor than any electric starter motor. So...well, assuming the ICE has solenoid-actuated valves, you can cut off fuel and spark and open all the valves to eliminate compression braking during any sort of coasting scenario, and even simulate compression braking with regen to keep charge in the batteries. When starting from a stop, use the electric traction motor and keep the ICE inactive for a few feet or so until you've built up a bit of momentum, then start up the fuel and spark and valve actuation. I sort of do something not entirely unrelated already with my '68 VW Camper. My driveway has a slope to it running downhill to the street. I back into the driveway. When I leave, I don't use the starter motor; the car almost always gets more than enough momentum just rolling a couple feet to "bump start" it, just with a gentle engagement of the clutch in second gear. Once the engine catches, I release the clutch, put the car in first, and drive away. I've thought about practical ways of doing something similar when my '64 1/2 Mustang gets the plugin hybrid treatment...but I don't think it'll be worth it. Most of the miles will be all electric, and any scenario with enough stop-and-go for that sort of thing to make sense will make even more sense all electric. The rare case where I'm doing some sort of stop-and-go and don't have enough left in the batteries for all electric...won't be worth engineering for. Cheers, b& -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 801 bytes Desc: Message signed with OpenPGP using GPGMail URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20150531/4dee8910/attachment.pgp> _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org For EV drag racing discussion, please use NEDRA (http://groups.yahoo.com/group/NEDRA)
