KiHa 122 series explained

KiHa 122/127 series
Manufacturer:	Niigata Transys^[1]
Yearconstruction:	2008–2009
Yearservice:	2009
Numberbuilt:	19 vehicles 7 × KiHa 122 6 × KiHa 127
Numberservice:	19 vehicles
Formation:	KiHa 122: Single car unit KiHa 127: 2 cars per unit
Capacity:	KiHa 122: 113 KiHa 127: 268
Operator:	JR-West
Depots:	Himeji
Lines:	Kishin Line
Carbody:	Stainless steel
Carlength:	KiHa 122: KiHa 127:
Width:	2900mm
Height:	4040mm
Doors:	Two pairs per side
Maxspeed:	100km/h
Engine:	SA6D140HE-2
Poweroutput:	Per engine: 331kW at 2,100 rpm^[2]
Transmission:	Hydraulic
Hvac:	WAU707 ×2
Bogies:	WDT65 (driving), WTR248 (trailing)
Brakes:	Engine brake, electronically controlled pneumatic brakes
Safety:	ATS-SW

The and are diesel multiple unit (DMU) train types operated by West Japan Railway Company (JR-West) on the Kishin Line between and . A total of 19 cars have been delivered, formed as seven single-car KiHa 122 series units and six two-car KiHa 127 series units.^[3] Test-running commenced in late September 2008,^[4] with the units entering revenue-earning service from the start of the revised timetable on 14 March 2009.^[5]

Exterior

The body design features improved crash resistance, based on the 223 series electric multiple unit design. The cars use environmentally-friendly diesel engines with reduced NOx and particulate emissions.^[6]

Externally, the units are finished in unpainted metal with thin yellow and red waistline stripes.^[4]

Interior

Internally, the cars feature flip-over reversible seating arranged 2+1 abreast. Toilets in both types of train are wheelchair-accessible, and the step between the passenger compartment and station platform has been eliminated.^[6]

Formations

The KiHa 122 single-car units and KiHa 127 two-car units are formed as follows.^[7]

KiHa 122 series (single-car unit)

The KiHa 122 series uses a diesel engine with a small lithium-ion battery (18 kWh) that is used to power auxiliary machines in the train.^[8]

Designation	cMc
Numbering	KiHa 122-0
Weight (t)	40.5
Capacity Total/seated	113/33

(Equipped with toilet)

KiHa 127 series (2-car units)

Designation	Mc1	Mc2
Numbering	KiHa 127-0	KiHa 127-1000
Weight (t)	38.5	37.5
Capacity Total/seated	130/41	138/51

(KiHa 127-0 is equipped with a toilet.)

Derivatives

• ET122, single-car DMUs for use on the third-sector Echigo Tokimeki Railway Nihonkai Hisui Line since March 2015

External links

• KiHa 122/127 series press release (JR-West)
• JR-West KiHa 122/127 series (Japan Railfan Magazine)

Notes and References

1. Web site: http://railf.jp/news/2008/10/02/135100.html. ja:キハ127+キハ122，網干へ回送. KiHa 127 & 122 moved to Aboshi. 2 October 2008. Japan Railfan Magazine Online. Koyusha Co., Ltd.. Japan. Japanese. 14 March 2012.
2. ja: キハ１２２・１２７系 気動車 . KiHa 122/127 series DMU . Japan Railfan Magazine. Kōyūsha Co., Ltd.. Japan. 49. 573. 68–72. January 2009.
3. ja: JR西日本 キハ１２２形・キハ１２７形を姫新線に導入 . JR-West to introduce KiHa122/127 on Kishin Line . Tetsudō Daiya Jōhō magazine. Kōtsū Shimbun. Japan. 37. 294. 70. September 2008.
4. Web site: http://railf.jp/news/2008/09/23/175300.html. ja:キハ127+キハ122が試運転. KiHa 125 + KiHa 122 Test run. 22 September 2008. Japan Railfan Magazine Online. Koyusha Co., Ltd.. Japan. Japanese. 14 March 2012.
5. Yomiuri Shimbun: 新型高速ディーゼル登場姫新線 (15 March 2009). Retrieved on 18 March 2009
6. Web site: http://www.westjr.co.jp/news/newslist/article/1173812_799.html. ja:キハ122、127系気動車の新製投入について. Introduction of new KiHa 122/127 series diesel cars. 26 August 2008. Press Release . West Japan Railway Company . Japan. Japanese . https://web.archive.org/web/20090115200437/http://www.westjr.co.jp/news/newslist/article/1173812_799.html. 15 January 2009. 14 March 2012.
7. Nishiwaki. Kōji. ja: JR各社の新世代気動車の現況 JR西日本キハ122・127形. The Current State of Modern JR DMUs - JR-West KiHa 122/127. Japan Railfan Magazine. 51. 597. 108–110. Kōyūsha Co., Ltd.. Japan. January 2011.
8. Yamamoto . T. . 2017 . Trends and Recent Studies on Hybrid Railway Vehicles . Quarterly Report of RTRI . 58 . 1 . 1–5 . 10.2219/rtriqr.58.1_1. free .