Abstract: A pressure sensor device for a modular pressure sensor package is provided, comprising a substrate having a pressure port that extends through the substrate from a first side of the substrate to a second side of the substrate. A pressure sensor die is attached to the first side of the substrate, forming a seal over the pressure port on the first side of the substrate. A cover is attached to the first side of the substrate over the pressure sensor die, forming a sealed cavity wherein the pressure sensor die is located within the cavity. The device also comprises a plurality of electrical connectors mounted to the substrate external to the cavity, the plurality of electrical connectors electrically coupled to the pressure sensor die. Further, the substrate includes at least one mounting element configured to secure a pressure port interface to the second side of the substrate in a position around the pressure port.

Abstract: A pressure sensor device for a modular pressure sensor package is provided, comprising a substrate having a pressure port that extends through the substrate from a first side of the substrate to a second side of the substrate. A pressure sensor die is attached to the first side of the substrate, forming a seal over the pressure port on the first side of the substrate. A cover is attached to the first side of the substrate over the pressure sensor die, forming a sealed cavity wherein the pressure sensor die is located within the cavity. The device also comprises a plurality of electrical connectors mounted to the substrate external to the cavity, the plurality of electrical connectors electrically coupled to the pressure sensor die. Further, the substrate includes at least one mounting element configured to secure a pressure port interface to the second side of the substrate in a position around the pressure port.

Abstract: A pressure-sensing module includes a housing having a process-fluid port configured to be coupled to a process-fluid-flow circuit. The housing defines a first chamber into which the process fluid can flow through the process-fluid port. An isolator assembly is disposed within the housing and includes a fill port. The isolator assembly is configured to define a second chamber into which pressure-coupling fluid may be injected through the fill port. An electronic circuit is disposed within the second chamber and is configured to be pressure coupled by the coupling fluid and isolator assembly to the flow circuit. A plug having first and second ends occupies the fill port thereby sealing the second chamber. The first end is exposed to the process fluid in the first chamber, and the second end is exposed to the coupling fluid in the second chamber.

Abstract: A pressure sensing device comprises a substrate having an opening, a pressure sensor die electrically connected to the substrate, and a pedestal having an upper surface that extends through the opening in the substrate, with the upper surface affixed to the sensor die. The pedestal has a pressure port that extends from the upper surface to a bottom surface of the pedestal, with the pressure port containing a hermetic sealing tube therein. A hermetic sealing cover is affixed to the substrate over the sensor die, with the cover and the substrate containing a reference pressure for the sensor die. A media isolation component has a chamber filled with a fluid that transmits a pressure applied to the media isolation component to the pressure sensor die. A capillary tube is affixed within the pressure port of the pedestal and is in communication with the sealing tube. The capillary tube and the sealing tube provide fluid communication between the chamber of the media isolation component and the sensor die.

Abstract: A pressure sensing device comprises a substrate having an opening, a pressure sensor die electrically connected to the substrate, and a pedestal having an upper surface that extends through the opening in the substrate, with the upper surface affixed to the sensor die. The pedestal has a pressure port that extends from the upper surface to a bottom surface of the pedestal, with the pressure port containing a hermetic sealing tube therein. A hermetic sealing cover is affixed to the substrate over the sensor die, with the cover and the substrate containing a reference pressure for the sensor die. A media isolation component has a chamber filled with a fluid that transmits a pressure applied to the media isolation component to the pressure sensor die. A capillary tube is affixed within the pressure port of the pedestal and is in communication with the sealing tube. The capillary tube and the sealing tube provide fluid communication between the chamber of the media isolation component and the sensor die.

Abstract: A pressure-sensing module includes a housing having a process-fluid port configured to be coupled to a process-fluid-flow circuit. The housing defines a first chamber into which the process fluid can flow through the process-fluid port. An isolator assembly is disposed within the housing and includes a fill port. The isolator assembly is configured to define a second chamber into which pressure-coupling fluid may be injected through the fill port. An electronic circuit is disposed within the second chamber and is configured to be pressure coupled by the coupling fluid and isolator assembly to the flow circuit. A plug having first and second ends occupies the fill port thereby sealing the second chamber. The first end is exposed to the process fluid in the first chamber, and the second end is exposed to the coupling fluid in the second chamber.

Abstract: The analog input of a sensor is connected to a 10-bit analog-to-digital converter. The converted is powered using a 5V supply. The A/D is interfaced with a microprocessor; however, only the least significant eight bits of the A/D output are connected to the microprocessor input. The microprocessor is used to adjust the fuel-air mixture used in engine combustion based on the output of the sensor. The use of the 10-bit A/D interfaced with only eight bits allows increased precision and increased computational speed. The increased precision allows more accurate adjustment of the fuel-air mixture to enable the engine to run closer to its stoichiometric point.

Abstract: A method for advanced crank spark with blend spark retard for an internal combustion engine includes the steps of selecting whether a spark in an engine cylinder will be fired on a predetermined first or second crank edge during an engine start mode, firing the spark on the second crank edge during the engine start mode if the second crank edge is selected, firing the spark on the first crank edge if the first crank edge is selected, determining whether the internal combustion engine is in the engine start mode based on engine speed, continuing to select whether to fire the spark on the predetermined first crank edge or the predetermined second crank edge if the internal combustion engine is in the engine start mode based on engine speed less than the predetermined speed, and retarding the spark from a first spark level to a hold start level at a predetermined rate, holding the spark at the hold spark level for a hold period, and advancing the spark to the first spark level at the predetermined rate, if the i

Abstract: A method of altitude compensation of exhaust gas recirculation in an intake manifold for an internal combustion engine includes the steps of calculating vacuum at sea level, calculating vacuum at present altitude of the engine, determining whether the calculated vacuum at sea level is equal to the calculated vacuum at present altitude, and correcting the exhaust gas recirculation in the intake manifold if the calculated vacuum at sea level does not equal the calculated vacuum at present altitude.

Abstract: A method of estimating exhaust gas recirculation in an intake manifold for an internal combustion engine includes the steps of determining a volumetric efficiency value of the intake manifold, determining whether a speed of the engine is accelerating, getting a manifold unfilling constant if the speed of the engine is not accelerating, getting a manifold filling constant if the speed of the engine is accelerating, calculating a K-factor based on the volumetric efficiency value and either the manifold filling constant or manifold unfilling constant, and using the K-factor to modify spark of the engine.

Abstract: A collapsible privacy chamber preferably for use aboard a boat or other watercraft is provided. The privacy chamber includes an openable enclosure having an openable top, a sectional support member, mechanism for anchoring the sectional support member inside of the openable enclosure, an upper suppport frame, a flexible sheet attachable to the upper support frame such that the flexible sheet can hang from the upper support frame thereby providing a partial enclosure such that one can obtain a measure of privacy inside of the partial enclosure, an upper mechanism for supporting the upper support frame such that the upper support frame can support the flexible sheet. The sectional support member preferably includes a plurality of elongated cooperating segments. The sectional support member cooperates with the anchoring mechanism to anchor the support member in the openable enclosure such that the assembled support member can extend vertically from the enclosure.

Abstract: A high lift tag axle load transfer system which can be used with front or rear discharge mixers, and front or rear mounted engines, and which includes raise, lower, and load cylinders carried on the outside of the main truck frame.