After I got done experimenting with my hybrid back in the 80's which was a General Electric DC 11 inch motor as a helper for hill climbing, my next project was to replace the transmission gears with a torque tube made by TCI.com who makes and modifies transmissions for racing.
This drive tube bolts directly on to a engine crank or motor coupler that eliminates the a flywheel, clutch and pressure plate. In a automatic, it eliminates the flex wheel and torque converter, but requires a pre-pressure oil pump to reduce the thrust which can brake things. Testing first with a manual with a gear ratio of 1.0 to 1 connected to a differential with a 5.57:1 ratio which is a overall ratio of 1.0 x 5.57 = 5.57:1. Starting out in this gear resulted in 600 to 700 motor ampere with slow acceleration. I added another gear ratio of 1.76:1 by using the 2nd gear which now gives me 1.76 x 5.57 = 9.8 overall ratio which is just right for city driving at 25 mph at 200 motor amperes, which is the continuous ampere rating of a WarP 11 motor. There was still some thrust problems at starting out, but not as bad as the violent thrust I had in 1.0 x 5.57 overall ratio with a 500 to 600 motor ampere at startup. Next I wanted to see how a automatic transmission would work. TCI.com recommended to use a GM TH400 transmission with a manual valve body, that eliminates the vacuum modulator and governor. You then can shift it like a manual and select the gear ratios at the sweet spot of a engine or electric motor. For the WarP-11 motor, the sweet spot is about 1800 rpm. So when the motor rises to 1800 rpm, then shift into the next gear and shift again when the motor gets to 1800 rpm again. First tried this set up without a torque converter which resulted in a very violent thrust at start up at 1 rpm. This resulted in 700 to 800 motor ampere which blew the transmission oil out the vent tube on to the floor. TCI.com recommended to use a low rpm large diameter torque convertor with a 1.8 ratio. The starting ratio will give me about a 10.0:1 overall gear ratio which runs at the motor continuous motor ampere. The torque converter cushions the torque trust which varies in a ratio of 1.8:1 at 1 rpm to 1.0:1 at 1800 rpm. NOW!! the motor ampere at start up may be 100 motor ampere or less and seen it down to 50 motor ampere. It is now a very smooth acceleration up to the 1800 rpm sweet spot of the motor. Increase the range of the EV by about 25 percent or instead of 39.5 miles, it is about 50 miles at 50% SOC. This type of transmission modification allows to have 3 speeds manual and with the 1.8 ratio torque convertor, it varies in ratios between the manual shifts. Like having a 6 speed transmission. Roland ----- Original Message ----- From: Tom Mandera via EV<mailto:[email protected]> To: Electric Vehicle Discussion List<mailto:[email protected]> Sent: Tuesday, July 22, 2014 12:16 AM Subject: Re: [EVDL] Hybrid On the topic of a hybrid install.. on something with enough space (perhaps not a Mustang), how about a boring old 4x4 transfercase. Leave the ICE configuration alone. Attach your electric motor either directly, or via the driveshaft, to the front output of the transfer case. Leave it in 4-high, and you could even run the motor as a generator at times. Put the ICE transmission in neutral when driving with the electric. Or go back farther in time, and you can run dual rear outputs on a Dana 18, Dana 20, or NP205, putting the motor behind the transmission and under the bed of a mini truck. You would lose gear reduction with this setup, though you would have 2 non-syncromesh gears in Electric mode by shifting between 4 high and 4 low (unfortunately acting as an overdrive instead) Sent from my Samsung Galaxy Tab®4 -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20140722/70f68a9c/attachment.htm<http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20140722/70f68a9c/attachment.htm>> _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub<http://www.evdl.org/help/index.html#usub> http://lists.evdl.org/listinfo.cgi/ev-evdl.org<http://lists.evdl.org/listinfo.cgi/ev-evdl.org> For EV drag racing discussion, please use NEDRA (http://groups.yahoo.com/group/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/20140722/7ef441fb/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)
