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Qingdao Launched Its First Operation Method of Energy Conservation for Pure Electric Bus That Will Save Millions of Kwhs
24 Dec, 2018

With Qingdao’s constant updating of its public transport vehicles, the number of pure electric buses the island city owns is increasing. Compared with fuel vehicles, there are certain unique operational skills that can be deployed for better use of pure electric vehicles. “In order to save energy, we must first ensure the vehicle and every part of it to be in the best condition at all times and that is the basis for energy saving,” said Mr. Wang Qun, a bus driver, who pays great importance to tire maintenance, engine room dust removal and air pump dust removal. He elaborated: “In operation, we must pay attention to road condition and traffic controls. For example, 3 traffic signal lights at the Xianxialing Road, East Yinchuan Road and Tong’an Road are synchronized at same intervals, 30 seconds apart. After the green light at Xianxialing Road intersection turns on, we should drive through the intersection of the East Yinchuan Road with constant speed and reach at a stop of the East Yinchuan Road. And then, we drive through the East Yinchuan Road with constant speed and enter the Tongan Road Stop where at this point of time, the intersection ahead would show a red light. After getting on and off of the passengers, we may get the right time to pass the intersection. By this way, we can optimally save lots of energy.” Wang Qun is a bus driver along the 501st route. After years of exploration and repeated tests, he found that the motor rev designed for the vehicle is 1000 rpm to 2000 rpm. And according to the bus operation, if the rev is between 1300 rpm and 1800 rpm and the speed is between 30km/h to 40km/h, it is the most economic. 

According to statistics, Mr. Wang uses a special operation method to run 2,600 kilometers per month that can save 900 KWHs and annually save about 10,800 KWHs. Wang Qun has been recognized as one of the most economical drivers of Qingdao pure electric buses.

“The 501st route is with 41.7 kilometers and it passes through 64 stops, 12 primary and secondary schools and kindergartens, 6 hospitals, 2 business districts, and 97 intersections of which 37 have no signal lights, as well as 142 zebra crossings. Of the 64 stops, 19 are connected to the subways Line 2 and Line 3.” Because of his well knowledge of the road conditions, he used the unique ability of electric vehicles to recover electricity by reducing the vehicle speed in advance on the downhill section and using the method of “continuous speed reduction” and “segment speed reduction” to extend the braking time and braking distance, so to maximally recover power energy.

Sources: http://news.qingdaonews.com/qingdao/2018-12/24/content_20263787.htm

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