I'd like to better understand how hybrid propulsion systems work. In theory, they combine an internal combustion engine with one or more electric motors, but how is the energy distribution managed between them? What role do the battery and power controller play in switching between modes? Are there standard control strategies, or do they vary by manufacturer? I’d appreciate any explanations and experiences you can share.
How does the hybrid propulsion system work in modern cars?
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In hybrids, the power controller decides at every moment whether the combustion engine, the electric motor, or both should operate based on the driver's demand and the battery's state of charge; the battery supplies power to the electric motor and recharges through regenerative braking or via the combustion engine. The ECU manages energy distribution using strategies like EV mode, throttle assist, and load based on RPM, though the exact algorithms vary between manufacturers. In my experience with the kart—though it’s not a hybrid—I can clearly see how electronic management affects performance and efficiency.