A double-decker’s aerodynamic problem
The development account links the revised nose and roof ventilation to exterior noise and tunnel pressure-wave control. The large body required attention to airflow beyond the cab alone.
신칸센
Two decks meet a much longer, lower nose than E1.
E4 · one eight-car set · 1999/2013 specifications
Two eight-car sets could form a sixteen-car train. The electrical equipment uses IGBT switching; the aluminium body helped reduce the mass of an all-double-deck train.
| 편성 · 차량 수 / M / T | 8 · 4M4T |
|---|---|
| 편성 길이 | 201 m |
| 차체 폭 | 3,380 mm |
| 전동기 1대당 출력 | 420 kW · continuous |
| 전원 방식 | AC 25 kV · 50 Hz |
| 열차 보안 장치 | DS-ATC |
| 구동 제어 | IGBT · three-level PWM 2 |
M은 동력차, T는 무동력차입니다. 수치는 1편성 기준입니다.
E4 development features · Hitachi 1999 introduction
| Roof air-conditioning | Revised air intake and discharge arrangement |
|---|---|
| Acoustic design | Reduced transformer and traction-motor noise |
| Structure | Aluminium construction for a lighter double-deck train |
The development account links the revised nose and roof ventilation to exterior noise and tunnel pressure-wave control. The large body required attention to airflow beyond the cab alone.
Hood connects the E4’s capacity with growing commuter use around Tokyo. Two decks and the ability to couple trains addressed concentrated demand. His historical photographs also show why a lower-deck window could face a sound barrier rather than an open landscape.
In an old interior photo, look for the aisle and the nearest automatic door. On the upper deck of cars 1–3, the rows narrowed from six seats to four near that door. The second car numbers apply to a coupled set.
| 위층 | Car 1–3 / 9–11 | 3 + 3 |
|---|---|---|
| 위층 출입문 부근 | Car 1–3 / 9–11 | 2 + 2 |
| 위층 | Car 4–6 / 12–14 | 2 + 3 |
Seat plans and sources · JR東日本 · E4系MAX大解剖
확인일 2026-11-07