Or even simpler, a 15-20 HP pusher engine with an electric clutch and a chain drive to a single wheel mounted as close behind the car as possible (to minimize scrubbing in tight turns.). Tune the engine to maximize power and minimize pollution at a calculated speed of 60 MPH, and lock in that setting. Use the car's motor to get up to highway speed, then hit a switch to activate the clutch. The pusher engine should be able to provide most of the power needed to maintain highway speed, dramatically extending the range of the car's batteries which would be called upon to "fine tune" the speed of the car. When you exit the highway you hit the kill switch disengaging the clutch and turning the gas engine off, and continue on battery power. The pusher would weigh less than 150 lb. and add little or no additional wind resistance. You're proposing to convert gasoline power into motion to extend your range - why take a detour into generating electricity and then using it to power an electric motor? just more loss there. KISS.
On Fri, May 19, 2017 at 5:46 PM, George Tyler via EV <ev@lists.evdl.org> wrote: > How about using a front end cut from a Prius as a trailer? Keep the drive > shafts etc, everything just as it is. Then, it is a pusher trailer plus > charger with extra regen braking too. There would be a number of ways of > doing this, if you want it simple, don't use MG2 Just MG1, and control the > throttle position to control charging current? This will control torque at > the same time, maybe even rig up a tow hitch control over throttle, like a > trailer brake in reverse? > > -----Original Message----- > From: EV [mailto:ev-boun...@lists.evdl.org] On Behalf Of conservation > architect via EV > Sent: 17 May, 2017 7:33 AM > To: ev@lists.evdl.org > Subject: Re: [EVDL] EV to Hybrid Trailer > > Thanks to those who replied to my inquiry. My instinct is that a real > engineer with familiarity of the cars design would be needed to pull this > off. > > David Roden makes some very interesting points. He points out that the > emissions are high for less regulated motors. The pollutants that he sites > are CO, NMHC + NOx. This certainly give me pause for moving forward. CO2 > is definitely a motivator for me. The emissions for this are gallons (10% > ethanol) typical x 19#CO2/gal (epa website http://www.eia.gov/tools/faqs/ > faq.cfm?id=307&t=11 ). > > I have evaluated the actual gas mileage using David’s metric of m/kwh x > speed to determine kwh/h or kw of continuous power. I would need 14.3 kw > generator. Using this 15 kw generator http://www. > electricgeneratordepot.com/generac-5734-gp15000e-15-000- > watt-electric-start-portable-generator-992cc-ohvi I end up with a mere > 18.75 mpg not accounting for the reduced m/kwh for the trailer. Our Honda > Element (2nd car) gets 25 mpg. The trailer would only make environmental > sense if we can go back to using renewable energy while we are at the > destination. My figures are pasted in from spreadsheet below. > > > _______________________________________________ > UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub > http://lists.evdl.org/listinfo.cgi/ev-evdl.org > Read EVAngel's EV News at http://evdl.org/evln/ > Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/ > group/NEDRA) > > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20170520/f23261a2/attachment.htm> _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Read EVAngel's EV News at http://evdl.org/evln/ Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
