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.

A pump device for an internal combustion engine, having a high-pressure fuel pump for supplying fuel to a first injection device, having at least one low-pressure inlet, via which the fuel is fed to the high-pressure fuel pump from a low-pressure fuel pump, having at least one low-pressure outlet for conducting the fuel conveyed by the low-pressure fuel pump and fed via the low-pressure inlet to the high-pressure fuel pump out of the high-pressure fuel pump, and having at least one low-pressure port, for conducting fuel conveyed by the low-pressure fuel pump to a second injection device. At least one mixing region mixes the fuel flowing through the low-pressure outlet with fuel fed to the mixing region from the low-pressure fuel pump upstream of the high-pressure fuel pump. The low-pressure port is fluidically connected to the mixing region, and the low-pressure inlet is supplied with fuel from the mixing region.

The present disclosure relates in general to injectors and, more specifically, to a fuel injection assembly that may be used in an internal combustion engine. In some embodiments, a fuel injection assembly may include: a fuel injector with a fuel inlet port and a fuel outlet end; and an injector cup with a recess receiving the fuel inlet port of the fuel injector through an opening of the recess. The injector cup comprises a collar extending circumferentially around the opening. The injector cup comprises a tab extending longitudinally beyond the opening in a direction towards the fuel outlet end. The tab projects axially beyond the collar in a longitudinal direction towards the fuel outlet end. The fuel injector comprises a pocket receiving the tab.

A sensor adapter assembly configured to couple a vapor pressure sensor to a fuel tank includes a base housing configured to couple to the fuel tank, and an insert adapter coupled to the base housing. The insert adapter defines a sensor insertion aperture configured to provide fluid communication to a space inside the fuel tank. The insert adapter is configured to couple to the vapor pressure sensor such that at least a portion of the vapor pressure sensor extends through the sensor insertion aperture into the space inside the fuel tank.

A vehicle which supplies a fuel from a fuel tank to an air-intake passage comprises a first injector which injects the fuel into the air-intake passage; a second injector which is disposed to be apart from the first injector in a flow direction of intake-air and injects the fuel into the air-intake passage; a fuel pump which discharges the fuel from the fuel tank; a first fuel tube, a first end of which is connected to the fuel pump; a second fuel tube, a first end of which is connected to the second injector; and a connector which is connected to a second end of the first fuel tube, a second end of the second fuel tube, and the first injector, and distributes the fuel from the first fuel tube, to the second fuel tube and the first injector, and the connector is firmly coupled to the first injector.

An electronic fuel injection throttle body unit has a core body with two side components. The two side components each including a fuel delivery passage. Four air intake passages extending vertically through the throttle body. Valves are rotatable within the air intake passages. The valves being connected to valve shafts that rotate about respective valve shaft axes. The valve shaft axes and the fuel delivery passages are perpendicular to each other.

In a piping connection structure of a vehicle including: a throttle body connected to a power unit of the vehicle to adjust an intake air amount; a fuel injection device for injecting fuel to an intake passage including the throttle body; first pipings attached to the fuel injection device; and second pipings provided separately from the first pipings, and having end parts connected to the first pipings so as to intersect with the first pipings, a connection part between the first pipings and the second pipings has a long adjustment holes, which extend so as to allow adjustment of relative angles between the first pipings and the second pipings.

A fuel supply system is provided, which supplies fuel to a longitudinal engine having a plurality of cylinders disposed in front-and-rear directions of a vehicle, and a side surface to which a mount member is coupled, the mount member fixing the engine to a vehicle frame. The system includes a fuel supply piping configured to guide fuel from a lower part of the engine to the plurality of cylinders located in an upper part of the engine. The fuel supply piping is disposed at least partially rearward of a front end of an engine auxiliary machine that is disposed rearward of the mount member and that has a higher rigidity than the mount member.

An electronic fuel injection throttle body unit has a core body with two side components. The two side components each including a fuel delivery passage. Four air intake passages extending vertically through the throttle body. Valves are rotatable within the air intake passages. The valves being connected to valve shafts that rotate about respective valve shaft axes. The valve shaft axes and the fuel delivery passages are perpendicular to each other.

A fuel delivery system for a vehicle having an engine includes a fuel injection system, a fuel supply line configured to supply fuel from to the fuel injection system, and a fuel pressure sensor. An active expansion chamber (AEC) accumulator is fluidly coupled to the fuel supply line and includes a housing defining an interior chamber and an adjustable expansion chamber, a plunger assembly separating the interior chamber and the adjustable expansion chamber, and an actuator configured to selectively move the plunger assembly to actively adjust a volume of the adjustable expansion chamber. A controller is configured to detect a pressure change condition in the fuel delivery system and, in response, automatically adjust the volume of the adjustable expansion chamber to maintain the pressure of the fuel delivery system below a predetermined threshold to thereby facilitate preventing fuel leakage at the fuel injectors when the engine is shut off.