What is b in prius?

In the context of the Toyota Prius, "b" typically refers to the "B Mode" or "Brake Mode" feature in the vehicle.

B Mode is an option found in most hybrid vehicles, including the Prius, that enhances regenerative braking. When the driver selects B Mode, it increases the level of regenerative braking, which helps to generate electricity and recharge the car's battery during deceleration or braking.

The regenerative braking system converts the kinetic energy produced during braking into electrical energy, which is then used to recharge the battery. This energy is harnessed and stored for later use, allowing the vehicle to operate more efficiently and reduce reliance on the gasoline engine.

By selecting B Mode, drivers can optimize the regeneration process, particularly in situations where they anticipate more frequent braking such as downhill slopes or heavy traffic conditions. This feature is especially useful in hybrid vehicles like the Prius, as it allows for greater energy recapture and longer electric-only driving range.