“Tough Gear”and “High Quality”for New X-TRAILFig. 1 e-POWER system configuration1. Introduction2. Overview and lineup of the e-POWER system3. Aim of the X-TRAIL-dedicated e-POWER Fig. 2 Line-up of e-POWER installed vehiclessystem*Powertrain and EV Engineering Division Powertrain and EV Project Management DepartmentA new e-POWER system was developed and installed in the X-TRAIL for the first time to satisfy the development concepts of “Tough Gear” and “High Quality.” The purpose, outline, and system design of the e-POWER system are described in this chapter.Fig. 1 shows the powertrain system of the e-POWER system, wherein 100% of the electric power is generated by the engine and 100% of the driving force is provided by the motor.The e-POWER system utilizes the characteristics of a 100% motor drive that generates the maximum torque at low revolutions and does not utilize a transmission mechanism. In addition, Nissan's unique motor control technology, which is created through the development of Leaf, is used to respond quickly to the accelerator pedal to ensure smooth acceleration. This is the primary feature of the e-POWER system. Further, the engine can be controlled independently of the drive system of the wheel shaft, which allows the start/stop time to be set independently of the vehicle driving pattern. Based on fixed-point engine operation, high fuel consumption 11efficiency can be achieved by improving the energy efficiency once the engine is started.In 2016, the 1st-generation e-POWER system was installed in a compact car for the Japanese domestic market for the first time. Later, in 2018, the range of models equipped with the system was expanded to include mini-vans and small Sports Utility Vehicles (SUVs) for the domestic market.In 2020, the 2nd-generation e-POWER system was installed in a new compact car, and its most significant features̶strength, smoothness, and quietness̶were evolved further to create a more electric vehicle (EV)-like feeling. To this end, the motor, inverter, battery, and engine that constitute the system were improved for increasing not only the output and the torque, but also fuel efficiency. Fig. 2 shows the e-POWER lineup.The new e-POWER system is developed as a powertrain for C-segment SUVs. It will be launched globally for the first smoother acceleration, and increased fuel efficiency.time, with In recent years, the demand for C-segment SUVs has increased rapidly in the automobile market given the increase in customer requirements. To this end, the top-class levels of quietness and acceleration performance related to “EV-ness” and sufficient fuel efficiency performance need to be achieved for satisfying the improved quietness, 2. “VC-TURBO”and“e-POWER”SystemNaohiro Yoshida* Jun Hasegawa* Masaki Takaoka*
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