Mcvan Aerospace

Xyron Corporation

Ray S McKaig

Brian Donovan

William B Dress

A method includes: filling a chamber having a recirculating valve, a piston, a cap valve, an injector valve and an injection orifice with a liquid by closing the injector valve and circulating the liquid from a source through the recirculating valve and the cap valve; then isolating the chamber from the source by closing the recirculating valve and the cap valve then allowing pressure within the chamber to follow a cylinder pressure by mechanically coupling the cylinder pressure into the chamber; and energizing an injector coil with electric current that pulls a solenoid assembly in an upward direction opening the injector valve, further motion of the solenoid assembly drawing the piston upward, wherein liquid in the chamber is compressed by the piston to a higher pressure than the cylinder pressure, which has the effect of injecting an electronically controlled stream of liquid out of the chamber through the injection orifice.

Pressure compensated fuel injector with solenoid pumping

A method of operating a pressure compensated fuel injector includes: filling a fuel chamber with a charge of fuel by closing an injector valve and circulating a fuel from a fuel source through a plurality of recirculating valves and a cap valve; then isolating the fuel chamber and the charge of fuel from the fuel source; then equalizing a pressure within the fuel chamber to a rising pressure outside the fuel chamber by reducing a volume of the isolated fuel chamber; and then activating a solenoid that is coupled to the injector valve, opening the injector valve; and then further reducing the volume of the isolated fuel chamber to apply an over pressure within the chamber, pumping fuel from the fuel chamber through the injection orifice.

Pressure compensated fuel injector

Methods and apparatus are described for a reciprocating combustion engine. A method includes operating a dual-piston engine including introducing a gas into a pair of combustion chambers; introducing a fuel into the pair of combustion chambers; compressing the gas; combusting the gas and the fuel; and exhausting combusted gases. Each of the pistons drives a reciprocating crankshaft that protrudes through a cylinder wall and cooperatively rotate a pair of rotors by engaging substantially sinusoidal cam tracks on the rotors. An apparatus includes a cam driven, concentric drive rotary-valve dual-piston engine.

Reciprocating combustion engine

A method for the orderly execution of multiple tasks in a data processing system and a circuit for implementing that method include a plurality of task modules which construct bids based upon the order of the task and its priority. The highest priority highest order number tasks are switched to available system execution resources. The system permits the orderly execution of round-robin task sets in an environment of dynamically changing priorities. When a round-robin task set is interrupted, the system is able to return to the round-robin task set after execution of the higher priority task at the exact point the interruption occurred.

Dynamic multilevel task management method and apparatus

A method and circuit are provided for converting a digital signal to an analog signal in the form of a pulse width modulated (PWM) pulse (). The PWM pulse is generated during an output cycle of a pulse generator to form a pulsetrain output of pulses at a fixed frequency whose widths are determined by dynamically changing digital input data. The method includes the steps of dividing the digital data signal into most significant bit (MSB) and least significant bit (LSB) portions. A PWM pulse is initiated at the beginning of an output cycle and continues while the MSB portion counts down in a counter (). At the same time, the LSB portion of the digital data signal is converted to a precise phase delay signal which is a subcycle of an oscillator controlling the counter. This phase delay signal is generated after the termination of the MSB count, and halts the high period of the PWM pulse during the output cycle. When the output cycle ends, the process is repeated with the next digital signal.

Digital to analog convertor

An analog to digital convertor includes a pulse width modulated circuit (PWM) responsive to an analog parameter of an analog signal. The PWM circuit generates a pulse having a duty cycle proportional to the analog parameter. A counter generates a plurality of counterpulses during the pulse duty cycle and a sub-cycle pulse generator generates a series of subcycle pulses during each of the counterpulses. A latch circuit latches the state of the subcycle pulse generator at a predetermined time relative to the termination of the PWM pulse and a logic circuit counts the number of counterpulses which are generated during the PWM pulse. A most significant bit number is represented by the number of counter-pulses and a least significant bit number is determined by the state of the subcycle pulses in the latch. These two numbers added together provide a digital number representative of the analog parameter.

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Wilsonville, OR, United States of America

Ray S McKaig