What are the disadvantages of hybrid electric vehicles?

[StKyle]

Hybrid electric vehicles have the following disadvantages: 1. The technology is not yet mature, and related products are priced too high. The cost of manufacturing two power systems (electric motor and internal combustion engine) is higher than that of a single power system. 2. They are not fuel-efficient during prolonged high-speed or constant-speed driving. The fuel-saving advantage of hybrid vehicles mainly relies on storing potential energy for electric power conservation. Hybrid vehicles are relatively more energy-efficient during frequent braking and deceleration or frequent starts and stops. However, if driven at a constant speed for a long time, the energy-saving effect decreases. The advantages of hybrid electric vehicles include: 1. High fuel economy and superior driving performance. Hybrid vehicles use an internal combustion engine that runs on fuel, but during starts and acceleration, the assistance of an electric motor can reduce fuel consumption. The internal combustion engine can be shut off, allowing the battery to drive the vehicle alone, achieving zero emissions. 2. The power performance is superior to that of a pure internal combustion engine vehicle of the same displacement, especially during starts and acceleration, as the electric motor can effectively compensate for the low-speed torque deficiency of the internal combustion engine. 3. Reduced mechanical noise inside the vehicle, and the use of the electric motor during low-speed or idle operation.