| Yutong ZK6125BEVGS (E12DD) | |
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| Manufacturer | Zhengzhou Yutong Bus Co., Ltd. |
| Bodywork | Yutong Integral |
| Years in operation | 2020—Present |
| Operators | Tower Transit Singapore SMRT Buses |
| Length | 12 metre |
| Motor | TBC |
| Accessibility | Low floor |
| Emission Standard | Zero tailpipe emissions |
The Yutong ZK6125BEVGS (E12DD) is a fully electric double-deck city bus manufactured by Yutong in China. The bus model shares its model name with the more prevalent Yutong E12 single-deck electric city bus.
10 units of the Yutong E12DD bus were procured by the Land Transport Authority in 2018 as part of efforts to build a more environmentally friendly public bus fleet. A further 10 more Yutong E12 single-deck electric buses would be acquired, for a total of 20 Yutong electric buses. In total, 60 electric buses were procured from three separate manufacturers at a total sum of S$50.64 million.
Bus operators in China are primary customers of the Yutong E12DD, with units operating in the Chinese cities of Guangzhou, Shangqiu, Zhengzhou and Zhoukou.
Background
The Yutong E12DD is marketed as an electric city bus capable of being fitted as a sightseeing bus, with a large upper deck windshield, large side windows and a panoramic sunroof, along with a suite of configurable interiors features for passenger comfort.
The bus design incorporates large-capacity batteries which allow the bus to travel more than 200 km on a single charge, under urban road conditions. Yutong touts cost savings of over 30% over a 5-year period as compared to an equivalent diesel-powered double-deck bus. Constant-power charging is said to reduce charging times by 25%; allowing for a charging period of just 1.9 hours at night. However, the actual battery capacity of the Singapore units is to be confirmed.
Yutong ReCtrl Electric Drive
Yutong's Electric Drive Technology (Click to expand) Yutong’s electric drive technology platform is called ReCtrl (or 睿控). In its most iteration, ReCtrl 4.0 (first released in 2017) combines four electric control technologies and four smart technologies as such: The Yutong E12DD is a fully electric city bus manufactured by the Chinese company Zhengzhou Yutong Bus Co., Ltd (郑州宇通客车股份有限公司), which manufactures road vehicles (primarily buses). The E12DD is just one of Yutong’s electric bus products, alongside hybrid and regular diesel buses. Photos of the Yutong E12DD were first circulated online in late August 2019, where the bus was spotted at a test centre in China. The exterior bodywork styling appears to be modified off the original E12DD, but fitted with a different head and rear design that possibly takes inspiration from the Yutong City Master, and a front bumper/headlight design taken from the Yutong U12. The Yutong E12DD is offered at a length of 12.3 metres as standard, but shortened to 12 metres for the Singapore market. The bus body is constructed out of high-strength steel. Features offered include IP68-rated electronics, electronically-controlled air suspension, dual-circuit air brakes with ABS among others, which are common to most modern buses. It is noted that a significant portion of space on the lower deck is occupied by batteries, hence the reduced passenger cabin space. The buses were spotted in Singapore in February 2020. Yutong E12DD buses are assigned the registration numbers SG7000S – SG7009T. The 10 Yutong E12DD buses are registered as SG7000S – SG7009T. These buses, registered as YUTONG ELECTRIC ZK6125BEVGS AUTO, are leased to the following operators: For the overnight charging of the Yutong E12 buses, overnight chargers have been installed at Bulim Bus Depot and Loyang Bus Depot, supplied by NARI. Back to Bus Models
— highly efficient electric motor replaces the traditional automatic transmission
— motor acts as a generator during braking, recovering kinetic energy into electrical energy to be stored in the batteries
— electro-hydraulic power steering requiring least steering effort
— automatically-adjusted heating/cooling with independent zone control, offering at least 15% energy savings over traditional vehicle air-conditioners
— overall management of energy consumption through onboard electronic control units and CAN bus network
— air-conditioning compressor reacts automatically to deliver optimum cooling capacity
— key vehicle operating parameters are transmitted over the internet for health and status monitoring
— vehicle charging performance is recorded for monitoring
Introduction
Basic Technical Specifications
Electric Motor
Yutong permanent magnet synchronous electric motor (rating TBC)
Battery
Lithium iron phosphate battery (Capacity TBC)
Charged via CCS Type 2 (providing DC charge)
Bodywork
Yutong integral bodywork (Steel monocoque structure). Built in Zhengzhou, China.
Full low-floor configuration
EDS
LECIP Electronic Display Sign
Orange LED Matrix; Mounted on Front, Left side and Rear
PIDS
LECIP OBC-VISION Passenger Information Display System
LED text displays, LCD display screens, interior speakers & exterior speaker
Passenger Capacity
TBC
Additional Specifications
SMC Transit door systems
Ster New City seats
TNT Surveillance Forward and Side collision warning system (T-FA Front Alert Camera; T-SA Side Alert Cameras)
TNT Surveillance Golden Eye anti-fatigue system
TNT Surveillance P2 automatic passenger counting system
USB Charging Ports
Stroller restraint system
Interior mood lighting
Fleet
Tower Transit Singapore
SMRT BusesCharging Infrastructure
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