Background and overview
Since class kiha40 vehicles owned by JR Hokkaido have gotten more superannuated
seriously, JR Hokkaido planned to develop class kiha40 vehicle with new
diesel-electric multiple unit, class H100, to displace class kiha40 vehicles,
and delivered two pre-production type vehicles nicknamed "DECMO"
in 2018. The design is based on diesel-electric multiple unit, GV-E400,
developed by JR East with additional heavy protection against snow and
coldness in Hokkaido.
Car body
They have 2800mm wide body, incorporating light weight stainless construction.
Their body features laser beam welding for the improvement of body strength
and reduction of skin distortion of side construction. In addition, their
cross member of the underframe, side column, and carline are positioned
longitudinally to form ring shape construction for more intense strength
against lateral collision. Their floor level is 1150mm from the top of
rails, 90mm lower than class kiha40 vehicles to eliminate the level difference
between platforms and the floor for accessibility. Gangwayed cab sections
have sweepback end plates to release offset collision impact load to the
lateral direction for the protection. Bodies are unpainted and have the
green, light green, and white waistline band running the length of each
car below the windows. The front of the vehicle is painted in black having
light green and yellow waistline band below the windscreens. Large "DECMO"
logos are splashed in each side. The destination panels employing 3-colure
LED are fitted above the gangways and two headlights employing LED and
tail lamps employing LED are fitted each side of the destination panel
at the front. Additional LED headlights are also fitted under the windscreens.
Two 1,050mm wide stepped single leaf automatic sliding doors which can
be operated manually by pushing the buttons located beside the door are
fitted at the toward each end of the body. Enough clearance between the
sliding door and the door case is secured to prevent the door from being
clogged with the door distortion caused by the temperature difference between
inside and outside of the vehicle. The clearance between the door and the
doorcase is also sealed with the rubber for the prevention that snow gets
into the doorcase while the doors closing. Door operating equipments having
closing strength attenuated mechanism and flashing alarm lamps while door
opening/closing are fitted above the door header of the sliding doors.
A fixed window facing wheel chair space and hopper windows located at the
others are fitted between the sliding doors. Each window employs composite
window pane consisting of 8mm thick polycarbonate plate, 4mm thick tempered
glass and 8mm thick air layer between the polycarbonate and the glass to
get thermal insulation and resistance against ballast attack caused by
snow ice dropping from the vehicle.
Bogies
Powered bogies are N-DT100 and trailer bogies are N-TR100, bolster-less
secondary air suspension, axle arm type journal box supporting system,
the single link traction device, and tapered roller bearings. Powered bogies
employ the single tread brake device adopting automatic gap-adjusting unit,
and trailer bogies employ both the single disk brake device and the single
tread brake device. Powered bogies are also equipped with the aluminum
oxide particle injectors to improve traction.
Traction unit and ancillary equipments
Class H100 vehicles are equipped with a four-cycle straight-six diesel
engine, DMF15HZD-G, with a power output of 450PS, employing common rail
direct injection which can inject small amount of fuel by the high-pressure
pump providing high pressure fuel in low revolution zone to improve combustion
efficiency and reduce nitrogen oxides and particulate matters. They also
equipped with a squirrel-cage induction generator, DM115, with a power
output of 305kW. This generator is connected with their prime mover directly.
Their traction system consists of a 2-level PWM converter employing Silicon
carbide (SiC) MOSFET, a 2-level Variable-frequency drive (VFD) employing
SiC MOSFET and controlling 2 AC totally enclosed self-ventilated asynchronous
traction motors with a power output of 105kW, and an auxiliary power supply.
590V three-phase 590V electric power at 70Hz is supplied to the PWM converter
and the PWM converter supplies 750VDC. Since this traction system has built
in battery supplying electricity to the generator to rotate a prime mover
as a starter, the prime mover doesn't need a regular starter. They are
equipped with a motor driven oil free scroll compressor to save the maintenance
and reduce vibration. Class H100 adopts the electric command pneumatic
brake featuring truck basis control to realize the redundancy. Thus, if
the brake of a bogie were failed, brake system would work by using the
other bogie working normally. Anti-slip brake control on truck basis is
introduced for very bad flat spot prevention and for re-adhesion
Accommodation
Seating is arranged as mixture of longitudinal bench seating located near
the doorways and 2 or 4-seat transverse seating bays with 1676mm seating
pitch located at the centre of the passenger cabin due to conductor-less
operation and easing boarding and alighting while peak hours. Each seat
employs no sag springs supporting seat cushion and cantilever construction.
Straps were fitted throughout their body on the 2-seat transverse seating
bay side. Stanchions were fitted at the both end and centre of bench seating.
Stanchions located near priority seating are painted in orange and embossed
and the others are buffed. Wheel chair space is located beside priority
seating and a universal access toilet employing the vacuum toilet system
is located at the opposite side of priority seating. The ticket machines,
which put the ticket indicating the boarding station are located beside
doorways at the end of their body. An LCD fare chart and a fare box are
located behind the driver's cab. As for the device of driving cab, one
handle master controller operated by the left hand is employed.
Additional delivery
In 2019 JR Hokkaido delivered six mass production vehicles to Naebo depot in order to displace class kiha40 vehicles used on the rural services of Hakodate line between Oshamambe and Otaru after the pre-production locomotive underwent extensive test running. There are some noticeable differences over pre-production vehicles. Some hopper windows were changed into fixed windows. The automatic announcement device was introduced additional English announcement.
JR Hokkaido additionally delivered 7 vehicles to Naebo depot, 12 to Asahikawa and 12 to Tomakomai in 2020. JR Hokkaido also delivered 6 to Tomakomai, 24 to Kushiro in 2021, and additional 12 to Asahikawa and 2 to Kushiro in 2022.
Operations
Class H100 entered the rural services between Oshamambe and Otaru, Hakodate line in March 2020. They are now also used on rural services on Souya (Asahikawa - Nayoro), Sekihoku (Shin-Asahikawa - Kamikawa), Muroran (Oshamambe - Tomakomai), Nemuro (Shintoku - Kushiro), and Furano lines. |
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