The Commercial Vehicle Show - logo image
18 - 20 APRIL 2023 • NEC • BIRMINGHAM • UK

Low-cost hybrid bus trial

Torotrack, Optare, Allison and Ricardo used Euro Bus Expo to show a low-cost, high-efficiency hybrid "Flybus" project.  The Optare Solo midi-bus will use a prototype flywheel-based system to capture braking energy and release up to 100Kw to help the vehicle accelerate, cutting fuel use and emissions by some 20% in stop-start operation.  "The technology offers easier installation than battery-electric systems," said Richard Stone, Torotrak's engineering director, who is leading the project. Compared to a typical battery-based hybrid, the system offers "comparable gains in fuel economy" at a "fraction" of the size, weight and cost.  Stone expects that it will be possible to convert existing fleets without cutting passenger capacity.  The flywheel-hybrid bolts directly onto the standard automatic transmission with Torotrak's CVT managing the energy flow to and from Ricardo's 60,000rpm "Kinergy" flywheel.  The trial will deliver results next year.
More from Lin Collier on +44(0)1 772 427 864 or lin.collier@torotrak.com

Commercial Vehicle Show is owned and operated by The Commercial Vehicle Show LLP whose members are:
IRTE Services - logo image
Road Haulage Association - logo image
SMMT - logo image
©

2023

 - The Commercial Vehicle Show LLP
arrow-down-circle linkedin facebook pinterest youtube rss twitter instagram facebook-blank rss-blank linkedin-blank pinterest youtube twitter instagram