Is the 48V Mild Hybrid System Fuel-Efficient?

[Silas]

48V mild hybrid systems are fuel-efficient, as vehicles equipped with this system consume less fuel than pure gasoline-powered cars. The electric motor in a mild hybrid system has relatively lower power and torque, and most of the time, this motor functions to regulate speed or recover kinetic energy. The greatest advantage of the 48V mild hybrid system lies in its optimization of engine start-stop, acceleration, braking, and other driving conditions, leading to significant fuel savings. Firstly, the higher voltage enables a more powerful start-stop motor to drive the engine crankshaft more easily, resulting in shorter system response times and reduced jerky sensations. With a larger-capacity battery and a higher-power motor, the 48V mild hybrid system can perform more functions compared to conventional start-stop systems. For example, during vehicle acceleration or brief stops, the powertrain with a 48V system can operate in pure electric mode, avoiding the fuel-intensive idle phase typical of gasoline-powered cars during startup. Additionally, during braking or coasting, some kinetic energy can be recovered through engine braking, minimizing energy dissipation. Some 48V systems can even temporarily power the air conditioning compressor when the engine is off, preventing the AC from shutting down altogether.