A fuel supply device for an internal combustion engine includes a plurality of fuel injection valves that are disposed side by side in an engine main body or in an intake system component forming part of an intake system, and a fuel distribution pipe that is connected in common to the fuel injection valves and supported via a support part provided on the intake system component or on the engine main body, wherein the fuel distribution pipe is formed from a pipe material, and a restricting member that is a separate member from the fuel distribution pipe is mounted on the support part at a position adjacent to the fuel distribution pipe so as to abut against the fuel distribution pipe to suppress displacement of the fuel distribution pipe from the support part. Thus, it is possible to suppress displacement of fuel piping while ensuring the mass productivity.

Methods and systems are provided for operating a lift pump of an engine fuel system. In one example, a method may comprise predicting when a fuel rail pressure will decrease below a threshold assuming that a lift pump remains off. The method may further comprise powering on the lift pump before the fuel rail pressure decreases below to the threshold to prevent fuel rail pressure from decreasing below the threshold.

For an optimized metering of fuel and water for the operation of an internal combustion engine in which a direct injection and an intake manifold injection are provided for metering fuel into the internal combustion engine, and in which the internal combustion engine is assigned a system for water injection, a same intake manifold injector is used for both water and fuel injection.

An engine includes a common rail attached to one side portion of a cylinder block that pivotally supports a crankshaft in a rotatable mariner, the one side portion extending along a crankshaft center, and the common rail being configured to supply a fuel to the engine. A flywheel housing that accommodates a flywheel that is rotated integrally with the crankshaft is disposed in one side portion out of opposite side portions of the cylinder block intersecting the one side portion. One end portion of the common rail is disposed above the flywheel housing.

A fuel rail for an engine includes a tubular body having an outer surface and an inner surface, the inner surface defining a longitudinally extending fuel bore. The fuel rail also includes a valve bore extending normal to the fuel bore and extending through the outer surface of the tubular body at a first end and completely through the fuel bore to a second end.

A fuel line assembly includes a fuel line having has an inner surface and an outer surface joined to each other by a fuel line aperture. A fuel injector socket has at one end a fixation saddle which is concave within which the fuel line is received such that the fixation saddle has a concave surface facing toward the fuel line. A fuel injector socket receiving bore extends into another end of the fuel injector socket to receive a fuel injector therewithin. A fuel injector socket aperture extends from the concave surface to the fuel injector socket receiving bore. An alignment tube provides fluid communication between the inner surface and the fuel injector socket receiving bore, wherein a portion of the alignment tube is circumferentially surrounded by the fuel line aperture and wherein another portion of the alignment tube is circumferentially surrounded by the fuel injector socket aperture.

An internal combustion engine includes a delivery pipe through which a fuel is supplied to a fuel injection valve, a high-pressure fuel passage connected to the upstream side of the delivery pipe, and a high-pressure fuel pump connected to the upstream side of the high-pressure fuel passage. At least two narrowed-passage sections are disposed in the delivery pipe or the high-pressure fuel passage.

There is disclosed a method of de-icing a component of an engine assembly having a common-rail fuel injection system, including: pressurizing fuel to circulate the fuel through the common-rail injection system; drawing a portion of the fuel upstream of common-rail injectors of the common-rail injection system and directing a remainder of the fuel toward the common-rail injectors; and transferring heat from the drawn portion of the fuel to the component.

An engine including a common rail attached to one side portion of a cylinder block that pivotally supports a crankshaft in a rotatable manner, the one side portion extending along a crankshaft center, and the common rail being configured to supply a fuel to the engine. A flywheel housing that accommodates a flywheel that is rotated integrally with the crankshaft is disposed in one side portion out of opposite side portions of the cylinder block intersecting the one side portion. One end portion of the common rail is disposed above the flywheel housing.

A fuel injection system includes a fuel rail, and a damper that is disposed inside the fuel rail. The damper includes outwardly protruding first barbs formed integrally on one end of the damper and outwardly protruding second barbs formed integrally on an opposed end of the damper. The first barbs and the second barbs each engage the fuel rail inner surface, whereby the damper is located and retained within the fuel rail. The first barbs and the second barbs may be generally triangular in profile and each extend at an acute angle relative to the damper longitudinal axis. In addition, the first barbs and the second barbs are each oriented in the same direction relative to the longitudinal direction, whereby the damper is asymmetric when viewed in side view.