Patent ID: 6131552
Filing Date: 2000-10-17
Classification: F02D,F02M,Y02T

Abstract:
A fuel control system for delivering gaseous fuel from a source through an air/fuel mixer to a gas-operated engine, which comprises:at least one sensor for operative coupling to the engine to provide at least one electronic sensor signal responsive to engine operating conditions,an electronic control unit responsive to said at least one sensor signal for providing a fuel control signal indicative of a desired quantity of fuel to be delivered to the engine, anda pressure regulator for disposition between the source and mixer, and responsive to said fuel control signal for controlling delivery of fuel from the source to the mixer,said pressure regulator comprising a housing having an inlet for connection to the fuel source and an outlet for connection to the mixer, valve means disposed within said housing for controlling flow of fuel from said inlet to said outlet and wherein said valve means includes a valve member and a main pressure regulating spring that biases said valve member to a closed position relative to a housing-interior flow orifice communicating said inlet with said outlet, and a solenoid force motor having a solenoid coil and a rigid actuating member that extends from said coil within said housing and is mechanically operable coupled to said valve member independently of said spring for modulating the force applied by said spring to said valve member and thereby modulating the control of the operative position of said valve member, and therefore flow of fuel through said housing, as a function of said fuel control signal to said pressure regulator.