| Yutong ZK6128BEVG (E12) | |
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| Manufacturer | Zhengzhou Yutong Bus Co., Ltd. |
| Bodywork | Yutong Integral |
| Years in operation | 2020—Present |
| Operators | Tower Transit Singapore Go-Ahead Singapore SMRT Buses |
| Length | 12 metre |
| Motor | Permanent magnet synchronous motor |
| Battery | LiFePO4 (Capacity 375kWh) |
| Accessibility | Low Floor |
| Emission Standard | Zero tailpipe emissions |
The Yutong ZK6128BEVG (E12) is a fully electric single-deck city bus manufactured by Yutong in China. The Chinese manufacturer sells electric buses of different lengths and sizes for local and international markets.
10 units of the Yutong E12 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 E12DD double-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 E12, with units operating in multiple Chinese cities. The bus has been successfully exported overseas, with units entering service in Santiago (Chile), Strasbourg and Marseille (France), Newport (UK), Helsinki (Finland), Roskilde (Denmark), and more.
Individual units have also been trialled in various parts of Australia, New Zealand and the United Kingdom.
Background
The Yutong E12 is marketed as a capable electric city bus featuring a suite of driver assistance features, passenger comfort and safety. The bus design incorporates large-capacity lithium iron phosphate batteries which allow the bus to travel roughly between 230 km and 300 km a single charge, under urban road conditions. However, the actual battery capacity of the Singapore units is to be confirmed.
Different range and power consumption figures have been quoted by different sources around the internet, depending on local route conditions under which the Yutong E12 was trialled. A range of 320 km has been quoted at 20°C without air-conditioning on.
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: As illustrated by graphics produced by Yutong, the E12 appears to split its battery packs between the rear section and the roof of the bus, with the roof-mounted batteries typically taller than the air-conditioning unit. The Yutong E12 buses for Singapore appear to have the roof-mounted batteries split into two separate housing units; in front of and behind the air-conditioner, making for a split-type design. The Yutong E12 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 E12 is just one of Yutong’s electric bus products, alongside hybrid and regular diesel buses. Photos of the Yutong E12 first appeared in Chinese commercial vehicle website 提加商用车网 in September 2019. The bus is seen navigating a test track located within Yutong’s assembly plant in Zhengzhou, China. In comparison with Yutong E12 buses produced for other markets, the Yutong E12 buses in Singapore appear to have the roof-mounted batteries split into two separate housing units; in front of and behind the air-conditioner, making for a split-type design. More information on the drivetrain can be found in the “Background” section above. On 11 November 2019, the Yutong E12 (SG3098L), BYD K9 & ST Engineering Retrofitted Electric Bus were displayed at a press event at Ulu Pandan Bus Depot. These buses would be deployed for revenue service in early 2020. As part of LTA’s efforts to build a more inclusive public transport system, electric buses procured by LTA will not have the centre pole at the entrance door, to allow easier access for parents with open strollers. The 10 Yutong E12 buses would be registered as SG3090H – SG3099J. These buses, registered as YUTONG ELECTRIC ZK6128BEVG 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 Original publish date: 1 September 2019
— highly efficient electric motor replaces the traditional automatic transmission, offering smoother speed changes and reducing maintenance costs
— motor acts as a generator during braking, recovering kinetic energy into electrical energy which is 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 (such as drivetrain and auxiliary systems), using 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;
Nominal power/torque of 120 kW / 1400Nm
Maximum power/torque of 240 kW / 2850Nm
Battery / Charging
Lithium iron phosphate battery (Capacity 375kWh)
Charged via CCS Type 2 (providing DC charge)
Bodywork
Yutong integral bodywork (Steel monocoque structure). Built in Zhengzhou, China.
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
28 Seated Passengers + 52 Standing Passengers
2 Wheelchair Bays
Additional Specifications
SMC Transit door systems
Ster New City seats
Cling EZDS-06 roof-mounted air-conditioning
TNT Surveillance Forward and Side collision warning system
TNT Surveillance Golden Eye Anti-Fatigue System
Automatic Passenger Counting System
USB Charging Ports
Stroller restraint system
Interior mood lighting
Bus Display at Ulu Pandan Bus Depot
Fleet
Tower Transit Singapore
Go-Ahead Singapore
SMRT BusesCharging Infrastructure
Gallery (Pre-Revenue Service):
See Also:
External Links & References:
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