Woodward, Inc.

Lsi Corporation

Colorado State University Research Foundation

Solix Algredients, Inc.

Michael Ryan Buehner

Gregory James Hampson

David R Noeldner

John Karspeck

Guy Robert Babbitt

Domenico Chiera

Ricky F Bitting

Christopher Wayne Turner

Kristina Weyer-Geigel

Timothy John Farrow

Yi Han

Bryan Willson

Peter Michael Young

Samuel James McCreery

Jason Barta

Jason Charles Quinn

Wei Tjan Lim

David Jacob Rausen

David O Richards

Richard Charles Schoonover

David Eli Sherman

A housing defines a gaseous fuel inlet and a gaseous fuel outlet. A rotor defines an internal flow passage therethrough that rotates with the rotor to, alternately, allow gaseous fuel flow, or to block gaseous fuel flow, between the inlet and the outlet, based on a position of the rotor. A seal is biased to abut an exterior surface of the rotor. The seal is between the rotor and the outlet. An actuator is rotably coupled to the rotor. The driver is configured to rotate the rotor. A controller is in communication with the driver and is configured to control the driver to rotate at a rate based on an engine speed of the engine.

Asynchronous rotary fuel valve

The method includes the following features. A first pressure upstream of a throttle is received. A temperature upstream of the throttle is received. A second pressure within an intake manifold is received. An engine speed is received. An air flow is estimated based on the received first pressure, the received temperature, the received second pressure, and the received engine speed. Estimating the air flow includes determining one or more models to use for calculating air flow based on the received first pressure and the received second pressure. The models include a throttle flow model, a port flow model, or both.

Controlling an internal combustion engine system

Embodiments of a gaseous or dual fuel electronic pressure regulation system (EPRS) for a multipoint fuel injection engine are described herein. Additionally, embodiments of a method for controlling the EPRS are provided. In particular, the EPRS employs an electronic pressure regulator (EPR) capable of accurately determining and controlling the mass flow of gaseous fuel into a fuel rail so as to avoid pressure droop and over- and under-pressurization of the gas admission valves (GAVs). By using the EPRS described above, mass flow is able to be distributed to the downstream manifold or engine cylinders very accurately, and the GAVs are able to be driven simultaneously in a pressure/pulse duration that is optimal for accurate and repeatable operation.

Pressure regulating mass flow system for multipoint gaseous fuel injection

Photobioreactors according to embodiments of the present invention deliver nutrient gas intermittently to the photobioreactor media. In some embodiments, one or more gases are delivered according to a duty cycle or timing pattern. According to some embodiments, algae is grown in a photobioreactor using intermittent introduction of carbon dioxide. In other embodiments, carbon dioxide is supplied to algae grown in a photobioreactor in whole or in part from a head space above the media of the photobioreactor.

Systems and methods for delivery of gases to algal cultures

Various embodiments of the present invention provide systems and methods for processing data. As one example, a circuit is disclosed that includes a pre-detector that detects an estimated pattern in a digital input signal, and a summation element that subtracts the estimated pattern from the digital input signal to yield a noise estimate. The circuit further includes a data dependent noise prediction filter that is adaptively tuned to detect a noise pattern, and that filters the noise estimate to provide a filtered noise estimate.

Adaptive pattern dependent noise prediction on a feed forward noise estimate

Described embodiments provide a method for calibrating a continuous-time filter having at least one adjustable parameter. A square-wave signal is filtered by a continuous-time filter having a cutoff frequency less than fs. The filtered signal is quantized at the rate fs. An N-point Fourier transform is performed of the quantized signal into N real output values and N imaginary output values. At least one of the real output values are accumulated to form a real output signal and at least one of the imaginary output values are accumulated to form an imaginary output signal. The real and imaginary output signals are summed to form an output signal, which is then squared. The squared output signal is compared to a comparison value. At least one parameter of the continuous-time filter is adjusted based upon the comparison. The steps are repeated until the squared output signal is approximately the comparison value.

Method and system for tuning precision continuous-time filters

Growing community of inventors

Fort Collins, CO, United States of America

Michael Ryan Buehner