Reading Buses is challenging the best technology that can be produced for engines that will improve environmental performance and reduce running costs.

The company has announced that it will upgrade the hybrid systems in two of their existing double deck buses. 

Speaking at today's IMechE Transmission and Driveline Technology conference, Reading Buses Chief Engineer John Bickerton described the work as ‘pushing the powertrain technology envelope beyond the present capability of existing suppliers.’

One vehicle will use Vantage Power’s series-hybrid system, bringing stop-start and selective zero emission running capability.

The second vehicle will be converted to Magtec’s plug-in-electric drivetrain with a sub-1000cc on-board Compressed Natural Gas (CNG) engine to extend the range of the bus.

John Bickerton explained the philosophy:  “Even the most modern engines are not good enough, environmentally or commercially, for Reading Buses.

“We were an early adaptor of hybrid technology and are now at a stage where the whole life cost and performance of vehicles needs to be reviewed.

“We are really excited to trial these repower systems as the cost profile of our hybrids gives an opportunity to try something really innovative at this point in their lives.”

He said the project followed the work last year to push the boundaries of interior design with the experience gained from their claret spritzer buses, which they will continue to do with their 2016 vehicle intake.

“We are now moving onto look at engines and gearboxes and using third party technology to bring mechanical experience from outside the traditional sections of our industry.”

The two technology providers will convert vehicles during 2016, competing for a chance to upgrade a share of the remaining hybrid bus fleet as the vehicles come out of their original manufacturer’s warranty.

Said John:  “The work will be supported by £356,000 funding from the Department for Transport under the Clean Vehicle Technology Fund, improving the fuel efficiency of our hybrid buses and making savings from mitigating extended warranty costs.

“Testing has already been completed by Millbrook Proving Ground to provide baseline emissions results and the project aims to halve NOx emissions on a per-km basis as well as target zero emission running in the most congested parts of our operating area.”

He said the work was also commercially focused.  The upgraded vehicles would be cheaper to operate and have greater warranty cover through the whole life of the bus.

Reading Buses has confirmed that the agreements involve a commitment to fuel efficiency from both suppliers as well.

Added John:  “The project stands to deliver a ‘virtually electric’ bus for less than the normal on-cost for a conventional hybrid system – despite the extra work of repowering an existing vehicle.

“An equivalent brand new bus would cost at least twice as much.”

Reading Buses say that overall this work will improve the environmental performance and reduce the running costs of these ‘legacy vehicles.’  In turn, this will further enhance the green credentials of the Reading Buses fleet and its contribution to improving air quality.