Fuel Injection System
The fuel injector requires a constant working pressure of 3 bar. This is provided by a pressurised air system. The existing system was prone to leaking and bursting, and a lack of accuracy and repeatability of the fuel spray into the inlet maifold. Also, the total fuel capacity of the system exceeded that allowed by the competition regulations. The following tasks were undertaken to redesign and build the system, with the end result shown in the picture below:
- New, smaller glass fuel tank was acquired, with screwdown pressure seal.
- New, lighter and easier to use perspex fuel tank mountings designed and manufactured.
- Automotive standard 'Goodyear' 5 bar pressure resistant fuel hose purchased and
attached with metal hose clips.
- New aluminium fuel injector manifold designed and manufactured, with
straight bore to eliminate airlocks.
- Alignment and repeatability of fuel spray assured to the original design
specification of 53 degrees from the horizontal, by adding o-seals to the injector
head and mating the new manifold with the
cylinder head cover.
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University of Bristol, Faculty of Mechanical
Engineering,© 1999/2000
