An internal-combustion engine includes a cylinder, a piston, a spark plug, and a fuel injection valve. The piston includes a top surface and a cavity provided in the top surface. The cavity includes a bottom surface, a vertical wall, a first sidewall, and a second sidewall. The fuel injection valve includes a plurality of injection ports from which a plurality of fuel mists are to be obliquely injected toward the top surface of the piston in respectively different directions at a predetermined crank angle in a compression stroke. The cavity extends from a position close to a center of the piston toward the fuel injection valve when viewed from above the top surface of the piston. The first and second sidewalls extend toward the fuel injection valve when viewed from above the top surface of the piston.

An internal-combustion engine includes a cylinder, a piston, a spark plug, and a fuel injection valve. The piston includes a top surface and a cavity provided in the top surface. The cavity includes a bottom surface, a vertical wall, a first sidewall, and a second sidewall. The fuel injection valve includes a plurality of injection ports from which a plurality of fuel mists are to be obliquely injected toward the top surface of the piston in respectively different directions at a predetermined crank angle in a compression stroke. The cavity extends from a position close to a center of the piston toward the fuel injection valve when viewed from above the top surface of the piston. The first and second sidewalls extend toward the fuel injection valve when viewed from above the top surface of the piston.

In a mounting tool for mounting an injector on a cylinder head of an engine by being engaged with the injector connected to a fuel pipe, and urging the injector toward the cylinder head, a first band portion has a ring shape so as to surround an outer circumference of the injector, and is disconnected in a circumferential direction by a slit. A second band portion has a ring shape so as to surround the outer circumference of the injector, is disconnected in the circumferential direction by a slit, and is arranged adjacent to the first band portion in an axial direction. Plural elastic band portions connect the first band portion and the second band portion in the axial direction. The mounting tool is made of a single metallic plate.

In a mounting tool for mounting an injector on a cylinder head of an engine by being engaged with the injector connected to a fuel pipe, and urging the injector toward the cylinder head, a first band portion has a ring shape so as to surround an outer circumference of the injector, and is disconnected in a circumferential direction by a slit. A second band portion has a ring shape so as to surround the outer circumference of the injector, is disconnected in the circumferential direction by a slit, and is arranged adjacent to the first band portion in an axial direction. Plural elastic band portions connect the first band portion and the second band portion in the axial direction. The mounting tool is made of a single metallic plate.

A fuel injector assembly with a fuel injector and a coupling device is disclosed. The coupling device includes a fuel injector cup, a plate element, one or more screws and a wing clip. The plate element includes at least one through-hole for fixedly coupling the fuel injector cup with the plate element by the screw or screws respectively, so that the fuel injector cup, the plate element and the screw(s) are positionally fixed with respect to each other. The wing clip is arranged at least partly around the fuel injector and extends outward in a radial direction such that the screw or screws, respectively, are operable to block a movement of the fuel injector relative to the plate element in a first direction of the central longitudinal axis by mechanical interaction with the wing clip.

A fuel injector assembly with a fuel injector and a coupling device is disclosed. The coupling device includes a fuel injector cup, a plate element, one or more screws and a wing clip. The plate element includes at least one through-hole for fixedly coupling the fuel injector cup with the plate element by the screw or screws respectively, so that the fuel injector cup, the plate element and the screw(s) are positionally fixed with respect to each other. The wing clip is arranged at least partly around the fuel injector and extends outward in a radial direction such that the screw or screws, respectively, are operable to block a movement of the fuel injector relative to the plate element in a first direction of the central longitudinal axis by mechanical interaction with the wing clip.

The present disclosure provides a fuel injection unit for an internal combustion engine. The fuel injection unit includes: a separator that is disposed in an intake port to supplie air into a combustion chamber formed in an engine head, and that divides a channel for air into an upper channel and a lower channel; a blade disposed ahead of the separator and opening or closing the upper channel or the lower channel by rotating; and a first injector disposed over the intake port. In particular, when the first injector injects fuel, the blade does not interfere with the fuel.

Provided is a protective structure (64) for a fuel pipe (45) extending along the intake side of an engine main body (9) under an intake manifold (20). A protective member (61) is placed in front of the fuel pipe. The protective member includes a pair of legs (64, 65) secured to the intake side of the engine main body, a main body (63) extending from the legs upward in an arcuate manner along a front side of the fuel pipe and bent rearward in an upper part thereof, and an abutting projection (63G) extending from an upper end of the main body and projecting upward and rearward. A fastening member (26, 27) is passed through a flange of the intake manifold, and includes an engagement feature (36) positioned behind a free end of the abutting projection. The protective member minimizes the loading transmitted to the fuel pipe at the time of a vehicle crash.

Provided is a protective structure (64) for a fuel pipe (45) extending along the intake side of an engine main body (9) under an intake manifold (20). A protective member (61) is placed in front of the fuel pipe. The protective member includes a pair of legs (64, 65) secured to the intake side of the engine main body, a main body (63) extending from the legs upward in an arcuate manner along a front side of the fuel pipe and bent rearward in an upper part thereof, and an abutting projection (63G) extending from an upper end of the main body and projecting upward and rearward. A fastening member (26, 27) is passed through a flange of the intake manifold, and includes an engagement feature (36) positioned behind a free end of the abutting projection. The protective member minimizes the loading transmitted to the fuel pipe at the time of a vehicle crash.

A connecting element connecting a fuel injection valve to a fuel-conducting component includes: a main body having a receptacle space into which a fuel connector of the fuel injection valve is introduced; and a fastening element. At least one opening is provided in a wall of the main body surrounding the receptacle space. The fastening element for fastening the fuel connector on the main body is brought into the receptacle space at least partly through the at least one opening. At least one elastic bearing element is provided, and the fastening element brought at least partly through the opening into the receptacle space is supported on the wall of the main body via the at least one elastic bearing element.