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.

The invention relates to a pipe section 1 of a common rail line 2 that is provided for the high-pressure injection of a fluid, wherein the pipe section 1 has at least a first pipe 3 and an adapter 4; wherein the first pipe 3 has a wall 6 and extends at least along an axial direction 7; wherein the wall 6 has an inner circumferential surface 8 and an outer circumferential surface 9 and encloses a first line 10; wherein the adapter 4 has a connector piece 11 and a second pipe 12; wherein the connector piece 11 extends annularly around the first pipe 3 and is situated on the outer circumferential surface 9; wherein a second line 13 that is formed by the second pipe 12 is fluidically connected to the first line 10 via a first opening 14 in the first pipe 3 and a second opening 15 in the connector piece 11; wherein at least the adapter 4 is manufactured by means of a metal powder injection molding process.

The invention further relates to two methods for manufacturing a pipe section 1.

Low-cost fuel injection systems for internal combustion engines, including vapor fuel engines are provided.

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.

A functional module includes: a mounting plate (2) for fluid tight attachment to the cylinder head of an internal combustion engine, incorporating portions (3) of air tract, and an injection set provided with support and attachment legs (6) intended to rest directly on the cylinder head (7) notably at a first group of points of attachment (8) thereof. The mounting plate (2) is provided with primary attachment sites (9) intended to collaborate with a second group of points of attachment (8) of the cylinder head (7), and with secondary attachment sites (9) corresponding to at least some of the points of attachment (8) of the first group belonging to the cylinder head (7), the secondary attachment sites (9) of the mounting plate (2) being intended to be positioned over the top of at least some of the legs (6).

A fuel rail assembly for an internal combustion engine is disclosed. It includes a main gallery and a plurality of fuel delivery outlets. Each fuel delivery outlet has an injector cup and an injector cup mounting connection arranged between the main gallery and the injector cup. A fixing bracket is adapted to fasten the main gallery to the engine. The fixing bracket is spaced apart from the injector cup and secured to the main gallery. A fastening element is provided to secure the fixing bracket to the engine. A rigid connection member is coupled to the fixing bracket extends between the fixing bracket and one of the injector cup and the injector cup mounting connection.

A coupling device for coupling a fuel rail to a cylinder head of a combustion engine may include: a fuel injector cup coupled to the fuel rail and facing the cylinder head, a first fastening element facing the fuel injector cup and fixedly coupled to the cylinder head, at least one first spring element arranged between the first fastening element and the fuel injector cup and/or between the fuel injector cup and the cylinder head, a support element arranged between the fuel rail and the cylinder head and fixedly coupled to the fuel rail, a second fastening element engaged with the support element and fixedly coupled to the cylinder head, and at least one second spring element arranged between the second fastening element and the support element and/or between the support element and the cylinder head. The first spring element(s) may comprise metal, and the second spring element(s) may comprise plastic.

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 pipe includes a tubular header pipe and a socket coupled to the header pipe and supplied with fuel from the header pipe. The header pipe and the socket form a joining portion therebetween. The joining portion is shaped to be elongated in a first direction. The joining portion includes a communication hole that connects an inner region of the header pipe and an inner region of the socket. The communication hole is an elongated hole elongated in the first direction.

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.