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Tomorrow's winning powertrain solutions reside in those technology combinations providing optimized propulsion systems with zero emissions and no cost or performance penalty compared with today's vehicles. The recent Kyoto Protocol for CO2 reduction and the California Air Resources Board (CARB) thrust for zero emission vehicles along with the European Regulatory community, motivate car manufacturers to adopt new light body structures with low aerodynamic drag coefficients, low-rolling resistance and the highest efficiency powertrains. The environmental equation expresses car manufacturers aptitude and desire to create zero emission vehicles at acceptable levels of performance unlike limited range electrical powered vehicle products. The cheapest solution to the environmental equation remains the conventional internal combustion engine ($30 to $50 per kW).

Gasoline delivery-filtration systems presently used in vehicles are highly effective. Nevertheless, there is a continual evolution of the system as vehicles with improved emission profiles and fuel economy are manufactured and alternate automotive combustion fuels are being adopted. Therefore, an investigation of the fundamental parameters controlling delivery of filtered fuel to the engine is important to the engineers responsible for new designs. In this paper the basic engineering factors required to understand how in-tank fuel strainers function are discussed. Guidance in choosing fabrics that ensure optimum performance for various types of liquid fuels is also provided.