Yutong E12DD

Yutong E12DD
Yutong E12DD Electric Bus
Yutong E12DD Electric Bus
Manufacturer Zhengzhou Yutong Bus Co., Ltd.
Bodywork Yutong Integral
Years in operation 2020—Present
Operators TBC
Length 12 metre
Motor TBC
Accessibility Low floor
Emission Standard Zero tailpipe emissions

The Yutong 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:

  • Electric drivetrain
    — highly efficient electric motor replaces the traditional automatic transmission
  • Regenerative braking
    — motor acts as a generator during braking, recovering kinetic energy into electrical energy to be stored in the batteries
  • Electric steering
    — electro-hydraulic power steering requiring least steering effort
  • Electric air-conditioning
    — automatically-adjusted heating/cooling with independent zone control, offering at least 15% energy savings over traditional vehicle air-conditioners
  • Intelligent vehicle energy management system
    — overall management of energy consumption through onboard electronic control units and CAN bus network
  • Intelligent climate control
    — air-conditioning compressor reacts automatically to deliver optimum cooling capacity
  • Intelligent telematics
    — key vehicle operating parameters are transmitted over the internet for health and status monitoring
  • Intelligent charging
    — vehicle charging performance is recorded for monitoring

Introduction

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.

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
TNT Surveillance
Golden Eye anti-fatigue system
TNT Surveillance
P2 automatic passenger counting system
USB Charging Ports
Stroller restraint system
Interior mood lighting

NARI Bus Charger (Photo: Public Transport Council FB Page)

Charging Infrastructure

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.


Gallery:

See Also:
External Links & References:

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26 thoughts on “Yutong E12DD

  • 9 March 2020 at 12:48 PM
    Permalink

    These Yutong E12DD will Deployed on Service 12, 143 & 190 Since they given to GAS, TTS & SMRT.

    Reply
  • 5 March 2020 at 1:04 PM
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    Let me guess
    TTS>4 units
    GAS & SMRT>3 units each

    Reply
    • 16 March 2020 at 4:13 PM
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      My guess is all 10 to SBST since they are the ones who need new DDs.

      Reply
  • 28 February 2020 at 4:24 PM
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    These Buses will Registering as SG7000S to SG7009T instead of SG3101K to SG3110J

    Reply
    • 9 March 2020 at 3:08 PM
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      Why They Suddenly Jump to SG7xxx Instead of Continue From SG3xxx?

      Reply
      • 10 March 2020 at 1:51 PM
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        Because SG3xxx Designation for Hybrid or Electric SD whereas SG7xxx Designation for Hybrid or Electric DD.

        Example:
        SG1xxx & SG2xxx (Expect 2017C) – Diesel SD
        SG3xxx – Hybrid or Electric SD
        SG4xxx – Demo
        SG5xxx & SG6xxx – Diesel DD
        SG7xxx – Hybrid or Electric DD
        SG8xxx – Articulated

        Reply
    • 11 March 2020 at 4:03 PM
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      This Yutong E12DD Charged at Which Depot for SMRT?

      Reply

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