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e-POWER is Nissan's unique electric-drive hybrid powertrain that integrates an electric motor with a gasoline engine. Since the system is 100% driven by a high-output motor, drivers can enjoy an EV-like experience with the peace of mind of an onboard gasoline engine for generating energy for the battery.
The third-generation e-POWER system combines a purpose-built engine designed specifically for e-POWER applications. With the ground-up approach of the purpose-built engine, power generation from the engine is further optimized from the previous generation, including activation timing independent of driving conditions and powerband.
The 3rd-gen's new modular approach, called “5-in-1”, integrates five major components to enhance performance, significantly improving fuel efficiency and quietness. Compared to 2nd generation e-POWER (Qashqai)
A 5-in-1 modular approach optimizes the packaging of the motor, reducer, inverter, increaser and generator. This approach achieves a high level of efficiency by increasing current flow for greater output and mitigates energy loss.
Improving acceleration and energy efficiency requires higher output, which is achieved by increasing electrical flow. This also brings greater efficiency by reducing energy losses. The 5-in-1 system uses flat wire coils that can be arranged with minimal gaps, allowing higher flow through the motor. The inverter also features a latest generation power module and a double-sided cooling structure that efficiently dissipates heat, improving efficiency particularly at high speeds.
In addition, some models use silicon carbide (SiC) power semiconductors in the inverter, which reduce power loss compared with conventional silicon semiconductors. This allows more of the generated electricity to be used to drive the vehicle, reducing the amount of electricity that needs to be generated and helping improve fuel efficiency. Inverter double-sided cooling
Improving rigidity through integration avoided interference between the resonance points of the vehicle body to further enhance the system's quietness. This also enabled high-precision assembly, reducing runout tolerances of rotating shafts such as motors and gears, thereby suppressing vibration.
By sharing the 3-in-1 EV powertrain and its components, we not only contribute to reducing the number of parts and production investment but also leverage the technologies and expertise of both EV and e-POWER to efficiently drive the development of further optimized electrified powertrains. Purpose-built engines for power generation
There are two types of power-generation-focused engines available. By leveraging a purpose-built onboard engine for power generation, Nissan engineers have achieved a highly efficient powertrain design that significantly improves fuel economy over previous e-POWER applications. A contributor of this is an engine that can maintain a stable combustion cycle. Purpose-built engine HR14DDe Purpose-built engine with turbo ZR15DDTe
In general, to improve engine efficiency, it is important to increase the compression ratio and raise the EGR*1 ratio, which recirculates and mixes exhaust gas with the air intake system. Since a typical engine operates across a wide RPM range depending on driving conditions, it is difficult to maintain a stable and optimal combustion cycle.
e-POWER is Nissan's unique electric-drive hybrid powertrain that integrates an electric motor with a gasoline engine.