An e:HEV car is a hybrid-electric vehicle system developed by Honda. It combines the company's existing engine and electrification technologies with new advancements to achieve high fuel economy and a more engaging driving experience. Essentially, it represents Honda's hybrid technology.
In more detail, the e:HEV system represents a specific approach to hybrid powertrains, focusing on efficiency and responsiveness. While details may vary between specific Honda models equipped with e:HEV, the general principle involves:
- An Atkinson-cycle gasoline engine: Often optimized for fuel efficiency.
- Two electric motors: One primarily acts as a generator, and the other primarily powers the wheels.
- A lithium-ion battery: To store electrical energy.
- An intelligent power control unit (PCU): Manages the power flow between the engine, motors, and battery.
The e:HEV system often operates in three drive modes:
- EV Drive: Powered solely by the electric motor, drawing energy from the battery (for short distances and low speeds).
- Hybrid Drive: The gasoline engine powers the generator motor, which in turn provides electricity to the drive motor. The engine does not directly drive the wheels in this mode.
- Engine Drive: The gasoline engine directly drives the wheels for more efficient high-speed cruising, while the electric motor assists when needed.
This allows for optimal efficiency in various driving situations. The system seamlessly switches between these modes to maximize fuel economy and provide responsive performance.
