Fue supply structure for small vehicle engine
A fuel supply and engine technology, which is applied to the layout, engine components, engine control, etc. combined with the fuel supply of internal combustion engines, can solve the problem of difficulty in ensuring the reliability of the installation of fuel injection valves and fuel pipes, and avoid the increase in the number of parts and components. , the effect of reducing vibration and improving installation reliability
Inactive Publication Date: 2007-12-26
HONDA MOTOR CO LTD
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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.
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[0020] The implementation of the present invention will be described below in conjunction with an embodiment of the present invention shown in the accompanying drawings.
[0021] Fig. 1~9 shows an embodiment of the present invention, and Fig. 1 is the side view of small-sized two-wheel motor vehicle, and Fig. 2 is the direction view of arrow 2 in Fig. 1 that has omitted the vehicle body cover state, and Fig. 3 is the arrow 3 in Fig. 2 Figure 4 is an enlarged view of the main part of Figure 2, Figure 5 is a side view of the throttle body device viewed from the direction of arrow 5 in Figure 4, Figure 6 is a top view of the cross section of the throttle body device, 7 is a partially cutaway side view of the fuel pipe, FIG. 8 is an enlarged side view showing a longitudinal section of the installation portion of the intake pipe of the fuel injection valve, and FIG. 9 is a view in the direction of arrow 9 in FIG. 8 .
[0022] First, in FIGS. 1 and 2 , the body frame 11 of a small t...
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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...
Claims
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IPC IPC(8): F02M55/00F02F1/42F02B75/16B62J37/00F02M37/00F02M55/02F02M61/14F02M69/00F02M69/04
CPCF02M61/145B62J37/00F02M37/0017F02M37/007B60K15/01
Inventor 池田健一郎
Owner HONDA MOTOR CO LTD