Abstract: A method for making an admixture for concrete includes the steps of providing a carbon nanomaterial comprised of carbon nanoparticles and wetting and dispersing the carbon nanomaterial in a liquid organic solvent/compound mixture comprised of amine based compounds configured to de-agglomerate and uniformly disperse the carbon nanoparticles. The method also includes the step of selecting the organic/solvent compound mixture to perform the wetting and dispersing step and to also perform at least one additional function in a particular type of concrete. An admixture for making concrete comprises a suspension of uniformly dispersed carbon nanoparticles having a predetermined percentage range by mass of the admixture in an organic solvent/compound mixture comprising an amine based compound having a predetermined percentage range by mass of the organic solvent/compound mixture.

Abstract: The invention provides a system that controls the air intake pressure of a venturi mixer in an air/fuel ratio control system for gaseous fueled engines to match the fuel vaporizer/regulator output pressure (negative pressure) or to a desired set point of a fuel vaporizer/regulator connected to the fuel inlet of the venturi mixer. A differential pressure control valve in the air intake upstream of the venturi is used, which results in negative pressure vaporizer/regulators being compatible with the constant air/fuel ratio fluidic control principle of the venturi mixer. A differential pressure sensor or estimated differential pressure based on airflow and valve position is used in one embodiment to control the venturi intake air pressure to the desired set point. The set point may be zero or biased by an outer control loop of an engine controller.

Abstract: A control valve module for gaseous fuels on spark ignited reciprocating engines is presented. The control valve module has a valve that controls gaseous fuel flow to a mixer or other device for air/fuel ratio control, an actuator for moving the valve position, and a controller. The controller receives a signal from a heated exhaust gas oxygen (HEGO) sensor that is an indication of the fuel/air ratio and actuates the valve to control the combustion mixture to a precise stoichiometric ratio.

Abstract: A control valve module for gaseous fuels on spark ignited reciprocating engines is presented. The control valve module has a valve that controls gaseous fuel flow to a mixer or other device for air/fuel ratio control, an actuator for moving the valve position, and a controller. The controller receives a signal from a heated exhaust gas oxygen (HEGO) sensor that is an indication of the fuel/air ratio and actuates the valve to control the combustion mixture to a precise stoichiometric ratio.