“Tough Gear”and “High Quality”for New X-TRAIL - 3. Engine Evolution of e-POWER Kazuhiro OginoYorihisa TsuchiyaYuuki SakaiYasuhide Abe4. SummaryAuthorsFig. 10 Interior engine sound and frequency analysisHideaki MizunoReferencesIn a conventional 3-cylinder engine, there is no resultant force because each cylinder is balanced; in contrast, the VC-TURBO engine can generate vertical inertia force in a 120■ cycle (3 cycles per engine speed). Thus, the sound heard inside the vehicle is a light sound (Fig. 10) based on the 3n-order engine speed.The new 3-cylinder VC-TURBO engine achieves a low rpm at the fixed-point operation and with low fuel consumption, which enables a maximum output of 106 kW at as low as 4400 rpm.These technologies contributed greatly to achieving the goals of the new X-TRAIL performance by supporting precise power generation and energy management to realize EV-ness and quietness beyond the conventional limits.（1） Kiga shinichi et al.：The worldʼs first Production VariableCompression Ratio engine -The new Nissan VC-T （Variable Compression-Turbo） engine, 38th International Vienna Motor Symposium, 2017 （2） 松岡一哉 他: 新型 高効率1.5L 3気筒 可変圧縮比エンジン開発 自動車技術会 2021年度 秋季自動車技術会（3） Tsuchiya Yorihisa et al.：Development of the Second-Generation VC-TURBO, KR15DDT Engine, 30th AachenColloquium Sustainable Mobility, 202120
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