In search of a cleaner motorcycle, Lihang Nong went straight to the source of pollution: the fuel-injection engine. Most small engines still rely on dirty, inefficient carburettors. Nong, a recent graduate of the University of Michigan, developed the PicoSpray to take the place of a carburettor. The all-in-one electronic-fuel-injection (EFI) system should cost under R200. Potential uses range from motorcycles to lawnmowers. By Michael Austin
1. Intake: The size of the intake and how it bolts on to the engine will vary between applications. Nong says the first PicoSpray model will work on single-cylinder engines with displacements from 90 to 300 cm³.
2. Engine control unit: The built-in Engine Control Unit (ECU) includes sensors for air temperature, manifold absolute pressure and throttle position. For something simple, such as a portable generator, the system requires fuel and power connections alone, but it can accept outside inputs.
3. Pump: A positive-displacement pump replaces the fuel pump, pressure regulator and injector of a traditional EFI. The pump squirts high-pressure fuel into the intake on demand in precisely metered amounts.