Thursday, February 20, 2014

Do pure electric cars and plug-in cars have a transmission, automatic or standard? Can you buy an electric car?




Steve


with a stick shift?


Answer
"Electric cars" are not a factory produced standard machine. It is a class of vehicle power and there are many variations. Electric vehicles that use a standard electric motor can have that motor installed in a number of locations and this may in part dictate what kind of transmission if any is used.

An EV with wheel motors will have no other drive train components.

An EV with a motor installed in an axle may also have no other drive train components.

An EV with a motor installed between passenger seats will need a rear differential to (un) equalize wheel rotation and may have some gearing to change the motor speed to the drive shaft speed. It is possible to change the performance of the vehicle from power to economy modes with gearing changes but this is more efficiently done electronically so this is the method that is customarily used.

In a petrol vehicle the engine will only reach sufficient torque levels from about 3000 to 5000 RPM. In order to maintain those engine speeds a transmission is used. The electric motor can have full torque at 0 RPM and therefore a transmission may not be necessary and if the Tesla experience is of value it is more trouble than it is worth.

A major class of exceptions is conversion vehicles. These are vehicles that are converted from petrol engines to electric and often leave the transmission in place for the mechanical reverse gear. The clutch is removed as is generally not necessary for shifting. Operators often leave the vehicle in 2ed gear.

I once owned an MG midget with a switch on the dash for directional lights that would not cancel automatically. It was a lot of fun to drive. Similarly model T Fords where the dwell angle could be adjusted from the dash (the spark) would be fun to drive. But extra controls in traffic with kids screaming in the back may not be the choice of many vehicle consumers. We have to pick our vehicles according to what we want from them.

What are 12v kids electric cars like?




Ryan


buying my nephew one for Christmas. He's 3. Any advice also please.


Answer
PLEASE don't buy one for your nephew! I beg you.

1. He's only 3 years old. What are the odds that he is going to drive into something and get hurt?

2. Kids don't get enough exercise as it is, does he really need an electric car where he just sits in it? Get him a tricycle or something like that where he needs to pedal it.

3. I know you want to be the "cool" uncle, but don't you think a 3 year old with an electric car is pretty spoiled and ridiculous?

Get him a toy where he can burn off some energy (like a bike) or can learn something (like a leapfrog).




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