Abstract: A method for operating a gaseous-fuelled internal combustion engine by directly injecting the gaseous fuel into the combustion chamber is disclosed wherein the gaseous fuel is injected at injection pressures higher than 300 bar and the pressure ratio between the gaseous fuel injection pressure and the peak cylinder pressure is between 1.6:1 and 3:1, and preferably between 2.5:1 to 2.8:1. The injection pressure is selected to be between 300 and 540 bar and preferably between 300 bar and 440 bar. The injection pressure can be selected based on a preferred range for the pressure ratio.

Abstract: Emission targets, such as NOx levels, for gaseous fuelled internal combustion engines that burn a gaseous fuel in a diffusion combustion mode are increasingly more challenging to achieve. A method of fuel injection for an internal combustion engine fuelled with a gaseous fuel comprises introducing a first amount of pilot fuel in a first stage of fuel injection; introducing a first amount of main fuel (the gaseous fuel) in a second stage of fuel injection; and introducing a second amount of main fuel in a third stage of fuel injection. The first and second amounts of main fuel contribute to load and speed demand of the internal combustion engine. Engine maps calibrated for different engine performance can be employed in different regions of the load and speed range of the engine. The engine maps are blended when the engine transitions between two regions; and momentary excursions into different regions do not change the engine calibration.

Abstract: A method for operating a gaseous-fuelled internal combustion engine by directly injecting the gaseous fuel into the combustion chamber is disclosed wherein the gaseous fuel is injected at injection pressures higher than 300 bar and the pressure ratio between the gaseous fuel injection pressure and the peak cylinder pressure is between 1.6:1 and 3:1, and preferably between 2.5:1 to 2.8:1. The injection pressure is selected to be between 300 and 540 bar and preferably between 300 bar and 440 bar. The injection pressure can be selected based on a preferred range for the pressure ratio.

Abstract: Emission targets, such as NOx levels, for gaseous fuelled internal combustion engines that burn a gaseous fuel in a diffusion combustion mode are increasingly more challenging to achieve. A method of fuel injection for an internal combustion engine fuelled with a gaseous fuel comprises introducing a first amount of pilot fuel in a first stage of fuel injection; introducing a first amount of main fuel (the gaseous fuel) in a second stage of fuel injection; and introducing a second amount of main fuel in a third stage of fuel injection. The first and second amounts of main fuel contribute to load and speed demand of the internal combustion engine. Engine maps calibrated for different engine performance can be employed in different regions of the load and speed range of the engine. The engine maps are blended when the engine transitions between two regions; and momentary excursions into different regions do not change the engine calibration.

Abstract: An apparatus and method for excluding specific areas of a workpiece from quenching during a heat treat process. A workpiece, having preselected areas to be quenched, is positioned in a manner so that quench sprays are aimed toward the surface to be quenched. The area to be excluded from the quench is protected by a shroud, and steam is forced under the shroud during the quenching operation. Steam pressure within the shroud is maintained at a pressure sufficient to prevent the quench media from passing through a sealed edge of the shroud. The steam has a temperature sufficient to prevent a sudden drop in the workpiece temperature in the area protected from the quench media.

Abstract: A device fop detecting liquid incendiaries contained in bottles comprises a flexible cradle, such as a sling of thin rubber sheet (2), mounted between two supports (4); two conductors arranged laterally on the cradle (6), each conductor having a large surface area to thickness ratio; and an electrical circuit including a power source and indication means to provide an indication of the dielectric properties of a bottle placed within the cradle.

Abstract: The apparatus is attachable and detachable to walkers via rotating spring clips attached to the rails or legs of walkers. It is stable, attached at three points, yet variable in height and angle of surface by use of the telescopic brace, rotating clips and sliding brace attached to the tray angle by wing nuts and bolts. It is usable and storable and out of the walker user's way via the rotating attachment clips and telescopic brace. It does not rust not corrode and is cleanable with soap and water. The sliding of the brace horizontally in the angle, the telescopic variable height and tray angle, the angles of bends of the brace ends, and fully rotating attachment clips allow the apparatus to be assembled, attached and detached to multiple designs of walkers. The variable angle of the tray surface provides a writing surface while the apparatus is attached. The tray is countersunk and usable while attached for carrying items. Without the use of tools, the apparatus is assembled, attached or detached to walkers.