Very nice diagram. I didn’t realize the Volt was a series / parallel hybrid. It can reconfigure to operate in both modes. Primary mode is as a series hybrid with electric only until the battery depletes, then series hybrid for long range causing and then if torque requirements are high it will reconfigure and use the smaller motor add torque and even the gas motor as additional torque sources. Complex gear box but never the less interesting. The only thing it says it can’t do is run on the gas motor only so there must be a limp mode if you were to drive at hight speed too long and deplete the main battery it would need to run in series mode and limp along at the maximum the motor generator could provide.
I often see Volts plugged in at the L2 charging station here in Vancouver and the drivers I talk to run mostly pure electric. One member in VEVA bought the Volt primarily because he communtes to Seattle on a regular basis. Lawrence (smartED driver!) > On May 14, 2015, at 8:59 AM, Russ Sciville via EV <ev@lists.evdl.org> wrote: > > Wow, you do like to win an argument Paul. :-) > > Where do they disagree with me? Plenty of us cover 50 miles in good weather > and even hypermile to 60 although I haven't. > What I will say is that the power module is a complicated bugger but works. > It normally runs on the main motor, then combines with the generator, using > it as a motor over 60mph or under hard acceleration to increase available > power until the battery reaches low when the gas engine runs and the > generator links with it to generate power.At high speeds with the gas engine > the engine torque may or may not be linked with the output shaft but that is > never very clear. > At no time does the engine start to assist acceleration when in electric mode. > This link explains it well and there are youtube video's which are well worth > watching.http://www.autonews.com/assets/PDF/CA713241015.PDF > > It is the best car I have ever owned and my last gas car was an M3! > Russ > > From: Paul Dove <dov...@bellsouth.net> > To: Russ Sciville <rustyb...@yahoo.co.uk> > Sent: Thursday, 14 May 2015, 15:46 > Subject: Re: [EVDL] Supercharging is not the way. > > GM seems to disagree with you. > > - Farah says that in his mind the Volt is unequivocally an electric car. > "The Volt is an electric vehicle...because for the first 40 miles you can get > full performance running on nothing but an electric motor until the battery > is depleted," he said. > - The Volt has three distinct motive forces in it: a large electric motor, > a small electric motor/generator, and a 1.4 liter engine. Up to two of those > three forces can be combined in select ways through the Volt's secret sauce > drive unit—given the road demands and state of charge of the battery—to drive > the vehicle. > - Only the large electric motor is capable of moving the car forward on its > own. The small electric motor/generator and the gas engine can only ever be > combined with one of the other motive forces to drive the wheels. > - Even when the gas engine is on and partially driving the wheels, it > cannot operate without electricity flowing to one of the other motors. > - The gas engine, under most conditions, will be used to drive the > generator and produce electricity, and will not be used to drive the wheels. > - There is no "direct" mechanical linkage between the Volt's gas engine and > the wheels, rather there is an indirect linkage that is accomplished by > meshing the power output of the engine with the power output of one of the > other two electric motors. > > http://www.plugincars.com/exclusive-chevrolet-volt-chief-engineer-explains-volt-drivetrain-says-volt-electric-vehicle-90758.ht > > Sent from my iPhone > > > On May 14, 2015, at 6:59 AM, Russ Sciville <rustyb...@yahoo.co.uk> wrote: > > > The electronics only register cell electricity usage in the kWh field and gas > use in the other field.I agree though that any use of gas when measuring > range could be slightly incorrect as the Volt/Ampera REX is a generator only > and starts and stops regularly if driving slowly to ensure that it doesn't > put any gas generated power into the cells. The software engineers try > extremely hard to only generate energy for the road when the cells are > considered empty but are actually topped up and emptied in a continuous > process. > If you check earlier posts you will note that many display electricity only > use and are often over 50 miles. > BTW, these cars were so ahead of their time and are still probably the only > PHEV's that are pure electric with gas mode only used when the cells are > empty or "Hold/Mountain" mode is selected.They have huge power off the line > and will happily reach and cruise at 100mph (not on a public road) using > battery only. > It is later hybrids like the Outlander that seem to need gas mode to assist > the electric motor. > From: Paul Dove <dov...@bellsouth.net> > To: Russ Sciville <rustyb...@yahoo.co.uk> > Sent: Thursday, 14 May 2015, 12:41 > Subject: Re: [EVDL] Supercharging is not the way. > > I think you all are mistaken. You are using gas. Maybe not much .3 of a > gallon like the guy said in the forum but then it doesn't take much gas to go > 15 miles. Those cars go into gas mode if you go over 45 miles an hour I > believe > > Sent from my iPhone > > > On May 14, 2015, at 3:39 AM, Russ Sciville <rustyb...@yahoo.co.uk> wrote: > > > Hi Paul, > I never wished this to start an argument as we are all I hope avid EVers. > My post was simply to show that a well designed drive train is capable of > high mileages even when tugging around a heavy body and I totally agree with > other posts that removing weight and lowering the CD will inevitably reduce > the need for higher capacity battery packs. > The Volt/Ampera has a 16kWh pack but only allows around 10.4kWh to be used > for longevity and many are covering over 150,000 miles with little or no > capacity loss as I believe the loss is above the allowed amount. > As for proving the range, yes you need to drive steadily but it is an art > many EVers develop naturally and this forum link > https://speakev.com/threads/50-mile-club.304/page-11 will show that it is > exceeded regularly. > > What has surprised me is that my Volt/Ampera exceeds the range efficiency of > my Lotus Elise EV which only weighs a tonne although is using an older drive > train which uses the original gearbox fixed in third.. > > > From: paul dove via EV <ev@lists.evdl.org> > To: Electric Vehicle Discussion List <ev@lists.evdl.org> > Sent: Wednesday, 13 May 2015, 22:37 > Subject: Re: [EVDL] Supercharging is not the way. > > No they don't. 30 to 35 miles on battery. > You would have to prove that, Of course the i-MiEV will go further if you > drive 40 MPH. > I was speaking of normal driving. > From: Russ Sciville <rustyb...@yahoo.co.uk> > To: Paul Dove <dov...@bellsouth.net>; Electric Vehicle Discussion List > <ev@lists.evdl.org>; Electric Vehicle Discussion List <ev@lists.evdl.org> > Sent: Wednesday, May 13, 2015 11:05 AM > Subject: Re: [EVDL] Supercharging is not the way. > > Volt/Ampera's regularly do more than 50 miles on their 10.4kWh battery packs > and that includes dragging round a backup four cylinder engine in a steel > chassis. > > > > > > > > > > > > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: > <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20150514/c7e019f9/attachment.htm> > _______________________________________________ > 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) > _______________________________________________ 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)
