[Buses in Beijing]大金龙 King Long XMQ6127GH1 <HEV> 北京公交集团 BPT #88611 Front-right at Lincui Road

Two King Long XMQ6127GH1 12m low floor diesel-electric hybrid city buses

 

King Long version of "Beijing hybrid city buses", with its sibling Youngman Neoplan JNP6120GHP-1, is the newest hybrid buses in Beijing, helping the number of operating hybrid buses in Beijing hit 860 in Spring 2010.

 

XMQ6127G series has the latest, and also the best-loved exterior design of King Long's city buses, clear while stylish. Regretfully, the low floor, accessible bus has small windows and not enough wide doors. The interior remains identical to those of all new low floor buses in Beijing since 2008. The driver’s cockpit shielding glass becomes standard on BPT's new buses. Only the basic equipments are selected; folding seats in wheelchair area and outside wheelchair calling button are given up.

 

Same as BJ6123C7C4D, XMQ6127GH1 adopts a parallel diesel-electric hybrid system and the essential hybrid system from Eaton presents. Propulsion from the Cummins ISBe+225B 225hp Euro IV diesel engines drives the Eaton AMT (Automatic Mechanical Transmission) gearbox. Between the automatic clutch and the gearbox fits a permanent magnetic synchronous motor (PMSM) from Eaton with 44kW peak power and 26kW continuous power. Electricity collected from decelerating and braking is stored in the Li-Mn, non-plug-in-rechargeable battery packs, products of Citic Guoan MGL, beneath the last row of passenger seats instead of on the roof. An Eaton control unit commands the entire hybrid system.

 

The bus is propelled by the motor alone when speed is below 20km/h while the diesel engine takes over the job when speed exceeds. As the result, the bus accelerates from still with a sound very similar to that of an AC trolley-bus. ZF axles provide comfortable rides but unfortunately, due to the AMT gearbox, the gear shifting is not as smoothly as those AT buses do so that passengers are able to feel the presence of the slight dashes. But overall, XMQ6127GH1 is remarkable thanks to King Long's quality.

 

In the picture, Fleet No. 88611 (Trolley-buses Division, hybrid or dual-power bus, code 611) and one of its companion on the same line are waiting for the green signal at Lincui Road - Kehui Road Crossing next to the Olympic Village. In total 20 XMQ6127GH1s are in operation, all assigned to Line 81. Line 81 is derived from Olympic Special Bus Line 1, but goes more northward reaching the residential communities around Baoshengli area. The farthest one in the line is a BK6120N2 on Line 510.

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