Fue supply structure for small vehicle engine

Abstract

In a small sized vehicle in which, to a cylinder head of an engine, an intake pipe which is communicated with an intake port of the cylinder head is connected and, to the intake pipe or the cylinder head, a fuel injection valve which injects fuel toward the intake port is mounted, the reliability of mounting of the fuel injection valve and a fuel hose can be enhanced when the fuel is supplied to a single cylinder engine or when fuel is independently supplied to respective cylinders of a multi-cylinder engine. A fuel joint 33 having a connecting pipe portion 33a to which a fuel hose 79 for introducing fuel to a fuel injection valve 32 is connected is hermitically fitted on a head of the fuel injection valve 32 while setting a circumferential position of the fuel injection valve 32 to the connecting pipe portion 33a to a fixed position and, at the same time, the fuel joint 33 is fastened to the intake pipe 29 such that the fuel joint 33 is sandwiched between the fuel injection valve 32 and the intake pipe 29 while setting the position of the fuel injection valve 32 with respect to the intake port 31 to a fixed position.

Description

technical field [0001] The invention relates to a cylinder head of an engine mounted on a vehicle body frame and an air intake pipe connected to the air intake port of the cylinder head, and the air intake pipe or the cylinder head is installed toward the air intake port. A fuel injection valve for supplying fuel to a small vehicle, and particularly relates to an improvement in the fuel supply structure of an engine. Background technique [0002] In a small vehicle such as a two-wheeled motor vehicle equipped with a multi-cylinder engine, a structure in which the heads of the fuel injection valves of each cylinder are commonly connected to a fuel rail is known (for example, refer to Patent Document 1). [0003] Patent Document 1: Japanese Patent Publication No. 60-45751 [0004] However, when the engine is a single cylinder or when fuel is independently supplied to each cylinder of a multi-cylinder engine, it is difficult to secure the installation reliability of the fuel i...

AI Technical Summary

Problems solved by technology

[0004] However, when the engine is a single cylinder or when fuel is supplied independently to each cylinder of a multi-cylinder engine, it is difficult to ensure the installation reliability of the fuel injection valve and the fuel pipe if the above-mentioned conventional fuel supply structure is used as it is.

Images