Direct fuel injected engines
AssigneeOrbital Engine Company Proprietary Limited
InventorsMichael L. McKay, Steven R. Ahern
Life of this patent
Estimating the term…
Abstract
In a two-stroke spark ignition engine, fuel is injected through the cylinder wall at a location opposite to and above the level of the exhaust port (120). The fuel is delivered in the form of a number of streams such as, for example, streams (60), (61), (62). One of the streams (60) is directed upwardly across the cylinder to deliver fuel towards the combustion chamber cavity (122). This stream (60) is arranged not to impinge on the spark plug (123) but is caused to create a fuel rich cloud within the cavity (122). Streams (62) are directed downwardly and outwardly from the injection location and an optional stream (61) may be directed across the cylinder towards the exhaust port side of the cylinder.
Claims17
A method of fuelling a two stroke cycle spark ignited engine having a cylinder in which a combustible charge is prepared, and a cylinder head closing one end of said cylinder, an ignition means mounted in said head to ignite the combustible charge, a piston supported to reciprocate in said cylinder, and an exhaust port in the wall of said cylinder spaced in the axial direction from said cylinder head, said method comprising injecting a metered quantity of fuel into the cylinder from a single injector located in the cylinder wall between the level of the exhaust port and the cylinder head, said fuel being injected in the form of at least two individual streams, said streams being arranged so a first part of the fuel is directed towards the ignition means in the cylinder head and a second part of the fuel is directed into that portion of the cylinder on the opposite side of a diametral plane of the cylinder at the location of injection of the fuel to the cylinder head.
A method of fuelling a two stroke cycle spark ignited engine having a cylinder, a piston reciprocable in said cylinder, a cylinder head closing one end of said cylinder, a cavity in said cylinder head communicating with the cylinder and containing an ignition device, an exhaust port in the cylinder spaced from said cylinder head, and an air inlet port in the cylinder in the side of the cylinder opposite the exhaust port, the method comprising admitting air to the cylinder through said air inlet port, while the air is being admitted injecting fuel into the cylinder at a single location different from the air inlet port and in said side of the cylinder between said air inlet port and the cylinder head, said fuel being injected in the form of at least two individual streams, said streams being arranged so a first part of the fuel is directed towards the ignition means in the cylinder head and a second part of the fuel is directed into that portion of the cylinder on the opposite side of a diametral plane of the cylinder at the location of injection of the fuel to the cylinder head.
In a two stroke cycle spark ignited engine having a cylinder in which a combustible charge is prepared, a cylinder head closing one end of said cylinder, an ignition means mounted in said head to ignite the combustible charge, a piston supported to reciprocate in said cylinder, and an exhaust port in the wall of the cylinder spaced in the axial direction from the cylinder head, the improvement comprising a single nozzle means through which fuel is injected to the cylinder and located in the cylinder wall between the level of the exhaust port and the cylinder head, said nozzle means for directing the fuel in the form of at least two individual streams, with a first part of the fuel directed towards the ignition means in the cylinder head and a second part of the fuel directed into that portion of the cylinder on the opposite side of a diametral plane of the cylinder at the location of injection of the fuel to the cylinder head.
Dependencies are inferred from the claim text.