Introduction
Suzuki, part of the HySE consortium, works to make hydrogen a viable power source for combustion engine scooters. In October 2022, they unveiled a hydrogen-fueled Burgman scooter prototype. A new patent application reveals a design addressing the prototype’s size issue.
The Original Prototype
The original hydrogen-fueled Burgman ICE scooter prototype had a long wheelbase due to its fuel system. Fitting the large hydrogen cylinder required extending the wheelbase by 8 inches, shifting the powertrain and swingarm.
The New Patent Design
The new patent design solves the size issue without compromising fuel capacity by using two smaller cylinders:
- Front Cylinder: Tilted upward, it fits into a standard Burgman 400 chassis, eliminating the wheelbase stretch.
- Rear Cylinder: Fitted under the seat, pitched upward, and skewed to maximize size in the available space.
Challenges with Hydrogen Fuel
The patent highlights key challenges with using hydrogen as a fuel:
- Lower energy density compared to liquid hydrocarbons
- High storage pressure (10,000 psi) requires specific tank shapes
- Tanks must withstand high pressure
- Engine modifications are necessary for direct hydrogen fuel injection
The design isolates the radiator from the front hydrogen tank, using a deflector to direct hot air downward.
Future Developments
The HySE consortium, including Japan’s Big Four motorcycle companies and Toyota, works on improving hydrogen fuel systems. Kawasaki’s recent supercharged hydrogen-powered prototype demonstrates progress in addressing hydrogen storage and utilization challenges in motorcycles and scooters.
Read more: Nanomaterials Boost Hydrogen Production for Clean Energy
