Working principle of hybrid electric vehicle

What is the working principle of hybrid electric vehicles? A hybrid vehicle refers to a vehicle that mixes fuel (gasoline) and electric energy. Hybrid electric vehicles are driven by electric motors as auxiliary power of engines. The working principle of hybrid electric vehicle is that the engine and generator complement each other. If the engine is in the best working condition, let the engine work. If the engine is not in the best working condition, the generator will start auxiliary work. The purpose is to make the engine always in the best working condition, so as to obtain the lowest fuel consumption. The engine is in working condition, and only in the best working condition can there be minimum fuel consumption. Generally, the best working condition of pure fuel vehicle is about 2000 rpm, when the fuel consumption is the lowest. However, the engine speed will change with the change of gear and speed, so it is difficult to keep the best working condition all the time. In other words, when the engine reaches the best working condition, the car will be automatically replaced by an engine-driven vehicle. The rest of the time is driven by a generator. According to different structures, electric hybrid power can be divided into three categories: series hybrid power, parallel hybrid power and parallel hybrid power. Hybrid electric vehicles are not new energy vehicles, but only energy-saving vehicles. So the hybrid car still hangs a blue card.