| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 123279000 | Piston carried precombustion chamber | 8 |
| 20100206263 | DIRECT-INJECTION TYPE ENGINE - A plurality of convex portions are radially fanned and spaced apart from each other by a constant angle in a planar view on a tapered surface of a land portion formed on a bottom surface of a cavity formed in a top portion of a piston. Each convex portion is positioned such that the extending direction of the convex portion aligns with an axis X of a corresponding fuel spray. Thereby, each fuel spray moves forward through a space (convex portion space) between the corresponding convex portion and an inner wall of a cylinder head portion along the extending direction of the corresponding convex portion. When a fuel injection is performed during the latter half of a compression stroke, a pressure in a convex portion space is increased, compared with a pressure in a space of the other portion by the decrease of a ratio of the volume of the convex portion space relative to the volume of the space of the other portion by the proceeding of the compression by the piston. Each fuel spray is circumferentially expanded by the pressure difference. | 08-19-2010 |
| 20100258076 | DEVICE FOR REDUCING EMISSIONS IN A VEHICLE COMBUSTION ENGINE - A combustion chamber in an engine includes a piston and an injector with plurality of orifices arranged to inject spray/flame plumes, which impinge on a piston outer bowl section during most of the injection. Between spray/flame plume impingement areas and in a plane substantially perpendicular to reciprocal piston movement are arranged a first type of protrusions protruding into the combustion chamber, having a smooth form for preserving kinetic energy in the flame and for redirecting circumferential flame progress mainly towards a center axis of the piston with minimal flame-to-flame interaction. A second type of protrusions are arranged in the impingement areas, being adapted for redirecting flame progress into a circumferential flame progress direction in a plane substantially perpendicular to the reciprocal piston movement and with minimal flame-to-piston wall interaction and minimal kinetic energy loss. | 10-14-2010 |
| 20100319655 | INTERNAL COMBUSTION ENGINE WITH SHROUDED INJECTION VALVE AND PRE-COMBUSTION CHAMBER SYSTEM - An engine is provided. In one embodiment, the engine includes a precombustion chamber having a body, a secondary combustion chamber disposed at least partially in the body, and a plurality of passages configured to place the precombustion chamber in fluid communication with a main combustion chamber. | 12-23-2010 |
| 20100326400 | High Efficiency Pre-Chamber Internal Combustion Engines and Methods Thereof - Inventive embodiments are directed to components, subassemblies, systems, and/or methods for internal combustion engines and in particularly for diesel engines having prechamber combustion systems. In one embodiment, a combustion system can be provided with a pre-chamber adapted to cooperate with a piston in a manner that produces a highly efficient combustion process. In some embodiments, the pre-chamber has passages that have a variable cross-section and a variable angular orientation with respect to a centerline of the pre-chamber body. In one embodiment, the piston is provided with a number of surfaces that facilitate the flow of fuel and air within the combustion chamber. In some embodiments, the piston surfaces are generally aligned with angles of the combustion chamber such as the angle of the intake and exhaust valves. In other embodiments, the piston has surfaces that are adapted to cooperate with a tip of the prechamber. | 12-30-2010 |
| 20110271931 | Piston Bowl With Flat Bottom - A piston for a direct injection engine is provided, the piston having a bowl at an upper end, the bowl forming a portion of a combustion chamber. The bowl includes an inner surface that defines a volume configured to receive a fuel-air mixture, the inner surface of the bowl including a generally concave portion including a flat bottom surrounding a central protruding dome. The relatively flat bottom portion is bounded by two radial concave surface portions which are disposed below two convex separation features for the injected fuel spray. Such surface geometries may reduce soot and improve fuel-air mixing. | 11-10-2011 |
| 20130291827 | INTERNAL COMBUSTION CYCLONE ENGINE - An internal combustion cyclone engine includes a gas hole, a gas hole plugging protrusion, and oblique holes. The gas hole is provided in the piston, and connects the explosion chamber with the combustion chamber. The gas hole plugging protrusion is provided in the cylinder and configured to be inserted into and seal the gas hole while the piston is pushed up. Oblique holes are provided around the gas hole through the top plate portion of the piston, and each of the oblique holes connects the explosion chamber with the combustion chamber concentrically and obliquely. At the top dead center the top plate portion of the piston almost touches the top wall portion of the cylinder. At the start of the expansion phase before ignition substantially all of the compressed gas is in the explosion chamber and whirls around inside the explosion chamber during the compression phase. | 11-07-2013 |
| 20140060480 | INTERNAL COMBUSTION ENGINE WITH SHROUDED INJECTION VALVE AND PRECOMBUSTION CHAMBER SYSTEM - An engine is provided. In one embodiment, the engine includes a precombustion chamber having a body, a secondary combustion chamber disposed at least partially in the body, and a plurality of passages configured to place the precombustion chamber in fluid communication with a main combustion chamber. | 03-06-2014 |
| 20150034044 | HIGH EFFICIENCY COMPRESSION IGNITION, INDIRECT INJECTED DIESEL ENGINES AND METHODS THEREOF - Inventive embodiments are directed to components, subassemblies, systems, and/or methods to improve combustion efficiency in compression ignition, indirect injection, diesel engines, and in particularly for diesel engines having a removable pre-chamber. In all embodiments, a combustion system is fitted with a pre-chamber adapted to cooperate with a piston in a manner that produces a highly efficient combustion process. In some embodiments, the pre-chamber has passages that have a variable cross-section and a variable angular orientation with respect to a centerline of the pre-chamber body. In one embodiment, the piston is provided with a number of surfaces that improve combustion of the fuel/air mixture within the combustion chamber. In some embodiments, the piston surfaces are generally aligned with angles of the combustion chamber such as the angle of the intake and exhaust valves. In other embodiments, the piston has surfaces that are adapted to cooperate with a tip of the pre-chamber. | 02-05-2015 |
