1995-08-01

Application of Digital, Pulse - Width - Modulated, Sonic Flow Injectors for Gaseous Fuels 951912

Sonic flow, pulse-width-modulated electronic fuel injectors for gaseous fuels provide precise, stable and reliable service for over 1 billion cycles. Techniques for precision flow calibration are described along with dynamic response characteristics. Application techniques including pressure regulation, filtration and procedures for adjusting flow calibration for changes in gas pressure, temperature and composition are presented. Applications include single point (throttle body or mixer), multi-point constant flow and multipoint sequential strategies. Durability testing in parallel with a utility pipeline regulator fully conserves power and gaseous fuel in a simple, low cost, multiple injector test bank.

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