The Zhongtong Sunny is a series of city and intercity buses produced by Zhongtong for 8.3 to 12.0 metres length. Available versions since launch include LCK6103G, LCK6112G, LCK6121GHEV, LCK6125G, LCK6125G-1, LCK6830G, LCK6841GC and LCK6910G.

The LCK6121GHEV is essentially the hybrid electric variant, with a length of 12.0 meters.

SMRT Buses

SMRT used to operate one demonstrator unit of the Zhongtong Sunny LCK6121GHEV.

In 2011, SMRT received a Zhongtong Sunny LCK6121GHEV demonstrator for a 6 month evaluation. It was the first hybrid electric bus to be operated by SMRT.

At the end of a trial, the bus was returned to the dealer and no further purchases were made. It was sold to Travel GSH in 2013.

Specification Table

Registration no. SMB137A
Vehicle bodywork Zhongtong
Quantity 1
Year 2010
Period of registration 3 Jan 2011
Passenger capacity Seating: 34
Standing: 47
Wheelchair bay: 1
Total: 81
Engine model Dongfeng Cummins ISBe4 225B
Electric motor model Eaton Hybrid Electric Power System
Engine capacity 6693 cc
Emission standard Euro IV
Transmission model Eaton UltraShift F0-6406A-ASW
Power/torque 225 hp (165 kW) @ 2500 rpm / 850 Nm @ 1500 rpm
60 hp (44 kW) / 420 Nm (Electric motor)
Air-con model Tongsun TSZQD40
EDS model Mobitec MobiLED
EDS controller model Mobitec MobiMASTER ICU 400
Seat model Vogelsitze System 750/3


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