The invention relates to a common rail for a common rail fuel injection system of an internal combustion engine, having a tubular base body which is equipped with a plurality of connection openings. To enable the common rail to withstand higher pressures than conventional common rails, according to our embodiment at least two connection openings are disposed diametrically opposite one another in the tubular base body. In a further version of the invention, diametrically opposite at least one of the connection openings, there is a machining opening, which is closed by a closure plug.
The invention relates to a method for producing a fuel accumulator line and a fuel accumulator line comprising prestressed connection pieces. The connection pieces are mounted onto the fuel accumulator line with a prestress, by crimping, or by a temporal expansion and/or a temporal contraction of the fuel accumulator line. The connection pieces connect a line to the fuel accumulator line. The prestressing of the connection pieces allows pressure to be exerted on the fuel accumulator line, thus increasing the compressive strength.
A juncture and method for changing direction of fuel flow in a high pressure fuel injection system such as a common rail and/or a fuel pump, the juncture comprising a body, a first passage formed in the body having a first diameter and a longitudinal axis extending therethrough, the first passage including a groove positioned along a portion of the longitudinal axis, and a second passage formed in the body having a second diameter, a central axis extending therethrough, and an opening, the opening of the second passage being provided in the groove of the first passage to allow fluidic communication between the second passage and the first passage so that stresses at the juncture caused by high pressure fuel changing direction of flow is reduced.
A press fit plug assembly used to seal a fuel rail in which a pressure pulsation damper is inserted. The fuel rail includes an elongated member, a first member, and a second member. The elongated member extends along a longitudinal axis, the first member being positioned within the elongated member, with at least one inward projection extending toward the longitudinal axis. The second member, positioned within the first member, has at least one outward projection extending away from the longitudinal axis. The outward projection engages the inward projection between the first member end and the inward projection. A method of assembling a pressure pulsation damper within a passage of a fuel rail is achieved by forming a first seal between the fuel rail and a first member; inserting the pressure pulsation damper through the first member; and forming a second seal between the first member and a second member.
A juncture and method for changing direction of fuel flow in a high pressure fuel injection system such as a common rail and/or a fuel pump, the juncture comprising a body, a first passage formed in the body having a first diameter and a longitudinal axis extending therethrough, the first passage including a groove positioned along a portion of the longitudinal axis, and a second passage formed in the body having a second diameter, a central axis extending therethrough, and an opening, the opening of the second passage being provided in the groove of the first passage to allow fluidic communication between the second passage and the first passage so that stresses at the juncture caused by high pressure fuel changing direction of flow is reduced. The juncture is made from a bottom poured ingot cast alloy steel.
