e-POWER control technology

Advanced control technology supports the powerful and quiet driving that is characteristic of motor drive

e-POWER is Nissan‘s original electric powertrain which generates electricity from an engine and is 100% motor driven.
In addition to the smooth and powerful driving that is unique to and characteristic of motor drive, advanced control technology manages the engine's operation, providing an overwhelmingly quiet experience.
In areas where road noise is low, such as in urban areas, the engine‘s operation is suppressed as much as possible, and in areas where road noises are high, such as when driving at high speeds or on rough roads, the engine generates electricity and realizes a quietness that makes you feel as if the engine isn’t there.

System Operation

e-POWER provides an overwhelmingly quiet experience with less frequent engine operation when compared to general hybrids.

  • At low to medium speeds, such as in urban areas, the motor is only driven via the battery.
  • When the driver releases the accelerator for deceleration, the regenerative brake is activated and the battery is charged with the electricity that is generated.
  • When driving at high speeds, the engine generates electricity to drive the motor and charge the battery.
  • When strong acceleration is required, the motor combines the electricity generated by the engine and the electricity from the battery, and then powerfully drives the vehicle.

When the battery is low, the engine does not operate to generate electricity if possible. However, when driving on rough roads which tend to be noisy, the engine operates efficiently to charge the battery in a short amount of time.* In other words, on rough roads, the engine noise is masked by the road noise. Additionally, when charging at low speeds is needed, the engine operates while suppressing its RPM.

  • The control that changes operation according to road surface conditions is applied to some vehicle models.

System Mechanism

e-POWER has a high-power motor and a high-performance lithium-ion battery, and can drive battery-only in a wide range of situations.
Because the engine is specialized for power generation and is not connected to the drive wheels, the system can freely control the engine's operation.
Power generation timing is controlled by judging based on the vehicle speed, degree of acceleration, and battery charge level, etc. Technology is also being introduced that estimates road surface roughness from minute fluctuations in wheel speed and actively operates the engine on rough road surfaces.*
Additionally, by operating at efficient engine RPM when generating power, the engine's operating time is reduced and high fuel efficiency is achieved.
Through step-by-step changes to engine RPM according to vehicle speed, engine operation is controlled so that the engine isn’t apparent.

  • The control that changes operation according to road surface conditions is applied to some vehicle models.

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