Electric car: one gear, gear ratio of the "half" type - and reverse!
The fact that electric vehicles have only one gear is known to a large number of motorists. However, few people thought about the gear ratio of the gear ratios. Well, in an electric car, it is between 7,5 and 10: 1. Meanwhile, the "one" in an internal combustion car is usually 3-4: 1, with a 4: 1 area reserved for reverse gear. In other words: electric cars run on the reverse "half"!
Table of contents
- Electric car gears
- Two motors instead of electric motors
Most often the gear ratio of the electric motor to the wheel is about 8: 1. Thus, every 8 revolutions of the electric motor corresponds to 1 revolution of the wheels. Meanwhile, in combustion vehicles, the maximum reverse gear ratio we could find was close to 4: 1. The "one" ratio usually has a slightly worse ratio, most often around 3-3,6: 1, depending on on engine displacement (Toyota Yaris = 3,5: 1).
> Why is the Rimac Concept One 1/4 mile slower than the Tesla? Because he has ... gearboxes
Interestingly, in internal combustion cars, starting from about fourth to fifth gear, the ratio of engine speed to wheel speed is less than one, that is, it drops from 1: 1 to 0,9: 1 or 0,8: 1. Due to this, when driving on the highway, the combustion engine uses little gas, although it may have trouble climbing uphill on a steeper incline.
Two motors instead of electric motors
In electric cars with economy in general, they understand differently. Tesla does this, for example, by installing a second electric motor on the front axle. It has a different (lower) ratio or is made using a more energy-saving technology. As a result, the car uses a more powerful rear engine when accelerating and a more fuel efficient front engine when driving on the highway.
Note... Gear ratios aren't the only ones in an internal combustion car. As user brys555 correctly wrote to us on YouTube, the additional gearbox is either integrated with the gearbox (for front-wheel drive vehicles) or integrated with the rear axle.
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