TIP: Click on subject to list as thread! ANSI
echo: homepowr
to: ALEC CAMERON
from: JIM DUNMYER
date: 1997-10-04 08:03:00
subject: ENGINE DESIGN

 >MR> One advantage of the electric motor, in addition to its very high
 >MR> efficiency (95% & better), is that it develops maximum torque at 0 rpm
 >MR> while an IC engine develops maximum torque around 60% of redline. The
 >MR> problem is clearly not with electric motor technology.
 > 
 > Excessive torque at 0 rpm isn't necessarily good news. Wheel spin is
 > spectacular and noisy and a crowd pleaser, but it is no help to 
 > vehicle acceleration!
This is kind of interesting. All 'home' conversions of a gas auto to electric 
retain the transmission and clutch. It is common practice to shift at least 
once, from low to high during normal driving.
The commercial EV's such as those from GM do not use a shiftable 
transmission, although some may use a gear reduction box. 
Excessive torque causing wheelspin is very easily managed with an EV. It's 
already being done with today's computer-controlled cars; they retard the 
throttle a bit if the wheels start to break loose. It'd be even easier with 
an EV, as the entire drive unit would be computer controlled.
--- FLAME v1.1
---------------
* Origin: Telnet toltbbs.com or call 313-854-6001, Boardwatch #55 (1:234/2)

SOURCE: echomail via exec-pc

Email questions or comments to sysop@ipingthereforeiam.com
All parts of this website painstakingly hand-crafted in the U.S.A.!
IPTIA BBS/MUD/Terminal/Game Server List, © 2025 IPTIA Consulting™.