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Dual-motor, four-wheel-drive layout

From Wikipedia, the free encyclopedia

Typical dual motor layout

In automotive design, dual-motor, four-wheel-drive layout is mainly used by battery electric vehicles by placing electric motors on both front and rear axles and drives all four roadwheels, creating a four-wheel drive layout. This layout is made possible by the small size of electric motors compared to internal combustion engines, allowing it to be placed in multiple locations. It also eliminates the need of a drive shaft that are commonly used by conventional four-wheel drive vehicles to create space for batteries that are commonly mounted on the floor of electric vehicles.[1]

The layout is also beneficial to distribute available electrical horsepower to maximize torque and power in response to road grip conditions and weight transfer in the vehicle. For example, during hard acceleration, the front motor must reduce torque and power in order to prevent the front wheels from spinning as weight transfers to the rear of the vehicle. The excess power is transferred to the rear motor where it can be used immediately. The opposite applies when braking, when the front motor can accept more regenerative braking torque and power.[2] However dual motors usually have less range.[3]

In addition, electric vehicles may be equipped with more than two electric motors to achieve greater power output and superior handling. The first mass-produced triple-motor layout was introduced on the Audi e-tron in 2020, which consists of one motor at the front and two motors at the rear.[4][5]

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  1. ^ Park, Jim. "Dumping the Driveshaft on Electric Vehicles". Retrieved 2022-04-23.
  2. ^ "Tesla All Wheel Drive (Dual Motor) Power and Torque Specifications". 2015-09-21. Retrieved 2022-04-23.
  3. ^ Ramos, Alex (2022-12-31). "Dual-Motor EVs vs. Single-Motor EVs: Which Is Best?". MUO. Retrieved 2024-01-22.
  4. ^ tsport100 (2020-03-02). "Audi Claim World First with Mass Production Three Motor EV Powertrain". leccar. Retrieved 2022-04-23.{{cite web}}: CS1 maint: numeric names: authors list (link)
  5. ^ O'Kane, Sean (2020-02-28). "Audi announces three-motor performance versions of the E-Tron". The Verge. Retrieved 2022-04-23.
This page was last edited on 22 January 2024, at 16:56
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