JPS5877163A - Fufl nozzle fixing device - Google Patents

Abstract

PURPOSE:To achieve good vibration-proof performance and sealing performance, by supporting a fuel nozzle while holding between an engine member and a rear fuel piping through a seal ring at the tip side and an 0 ring at the rear end side. CONSTITUTION:A fuel nozzle 3 and a fuel piping 4 are provided through a holder 2. The holder 2 is C-shaped while equipped with flanges 5 at the front and rear where insertion holes are made to be inserted with the nozzle 3 while said nozzle 3 is provided with the step sections at the front and rear end sections and small diameter sections 8 with which a front seal ring 9 and rear 0 ring 10 are fitted. The holder 2 is overlapped with the facing face of an engine member 1 and the fuel piping 4 at the front and rear flanges 5 then fastened through each screw 11. Consequently good vibration-proof preformance and sealing performance can be achieved by both rings.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a mounting device for a fuel injection type fuel nozzle in an engine.
A type is known in which a fuel nozzle is provided outside the air manifold and other components via a holder, and a fuel pipe connected to the nozzle is provided outside the nozzle. It is preferable to prevent this vibration from being transmitted to the outside, and it is also preferable that there is no heat transfer from the outside and that good sealing performance can be obtained at the connection part of the straw bales.

The purpose of the present invention is to obtain a device that meets these requirements.
A U-shaped member having an insertion hole in the front and rear of the holder, in which a fuel nozzle is provided on the outside of the engine member through a holder, and a fuel pipe connected to the fuel nozzle is provided on the outside of the engine member. The nozzle is inserted into this in the front and back direction, and the front and rear ends of the nozzle O are each formed with a small diameter section, and a front seal ring and a rear 0ν In order to tightly connect the engine member and the fuel pipe to each other via the acid holder, the nozzle is connected to the engine member via the seal ring and the O-ring. It is sandwiched from the front and back between the faces facing the fuel pipe.

Embodiments of the present invention will be described with reference to attached drawings.

In the drawings, (1) indicates an engine member, which is provided with a fuel nozzle (3) on the outside thereof through a holder (2), and a fuel pipe (4) that communicates with the fuel nozzle (3) on the outside thereof. The engine member (
1) consists of the cylinder head (1a) at the top of the engine or the intake manifold (1b) extending from it; Ehold (1b)
is branched into four parts and each part is used as the engine member (1),
As described above, a fuel nozzle (3) and a fuel pipe (4) are provided on the outside of the fuel nozzle (3) via the holder (2). In this case, the nozzles (3) are arranged horizontally in four pieces as clearly shown in the figure, and each fuel pipe (4) is connected to a common line that is continuous with the other, as clearly shown in the figure. The book and the book holder (2) are also substantially the same, and are integrally formed in a continuous manner as shown in Figures 1 and 2.

For example, as shown in No. 4 Wi, it has a U-shape with 79 holes (51(5)) at the front and rear, and is equipped with front and rear insertion holes (61(a)), and the nozzle (3). This is it.

The nozzle (3) is inserted in the front and back direction, and the nozzle (3) has ◆stepped portions ()) (7) on the front and rear ends of each small diameter portion (8).
) (8), into which the front seal ring (9) and the rear O-linda spit Q are fitted, and the tongue holder (2) is provided with seven lunges (5) (5) at the front and rear. The engine member (1) and the fuel pipe (4) are superimposed on the opposing surfaces of the engine member (1) and the fuel pipe (4), and are fastened thereto by screws aOaυ, in other words, the engine member (1) and the fuel pipe (4) is the hol r
(1 and 14 so that they are fastened together.

Thus, the nozzle (3) is inserted between the facing surfaces of the member (1) and the pipe (4) via the seal ring (9) on the Monso side and the 09 (I) on the ** side. In other words, the test seal cylinder (9)
is interposed in a compressed state in the longitudinal direction between the nozzle and the engine member (1), and the 0 cylinder housing Q is inserted in the longitudinal direction between the nozzle (3) and the piping (4). Compression
Intervention was made in R11.

Furthermore, the outer diameter of the seal ring (9) is increased by the compression and is press-fitted into the outer peripheral insertion hole (6). In other words, the small diameter portion ( 8)
is supported from the outer periphery within the insertion hole (6) via the ring (9). The seal ring (9) has a relief part AS1 formed in advance on its outer periphery so as not to produce an excessive bulge when the outer diameter increases due to the compression, and a bottom plate α is superimposed on the back surface of the seal ring (9). .

Even though the outer diameter of the O-ring increases due to the compression, there is some gap between it and the insertion hole (6) on the outer periphery, and if this is fitted, the small diameter part (8) at the rear will become dead ( 6) The nozzle (3)
The large diameter section in front of the small diameter section (8) has at least one gate at its outer station. Small diameter part of Mongolia (8
) is an internal fuel passage (sl) that opens at the tail end of the large diameter part.
It shall consist of a pipe member whose tip is fitted into the pipe member and which extends rearward.

No. 4 Wi shows a modification of this, in which the holder (2) is made of a heat insulating material to further thermally retain the nozzle (3), and the rear insertion hole (6) is In this case, a metal catero is placed in a pot and reinforced mechanically.
Furthermore, the pipe member forming the small diameter part (8) at the rear is designed so that the filter A4 extending forward can be folded together.

In this way, according to the present invention, the fuel nozzle is supported by being sandwiched between the facing surfaces of the front engine member and the rear fuel pipe from the front and back via the seal ring on the front end side and the O cylinder on the rear end side. Both rings provide good vibration isolation in the front and rear.

It is possible to obtain heat insulation properties and sealing properties, and furthermore, the installation process is simple because the nozzle is prepared by inserting it into the holder in advance and it is sufficient to connect it to the engine member and the test fuel pipe in the holder. It also has the effect of increasing the volume.

[Brief explanation of drawings]

11th! J is a plan view of one example of the device of the present invention, FIG. 2 is a sectional view of the seal-to-seal sectional view, IS[ is a front view of the holder, FIG. 4 is an enlarged cut-away side view of the main parts thereof, and FIG. 4 is a sectional view of the seal ring, and 4th Wi is a cross-sectional view of a modification of the main part. (1)...Engine parts (2)--Holder (3)...Fuel nozzle (4)...Fuel piping (61 (6)...・Insertion hole (7) (7)...Step part (81 (8)...Small diameter part (9)...Seal ring aθ...O cylinder α1) Qυ...・Screw outside! name

Claims (1)

[Claims] A fuel nozzle is connected to the outside of the engine member via a holder;
In the case of a type in which a fuel pipe connected to the holder is provided on the outside, the holder f is configured as a U-shaped member having an insertion hole at the front and rear, through which the nozzle is inserted in the front and back direction, and at the front and rear of the nozzle. Each step is attached to the end part to form a small diameter part, and a front seal ring and a rear O cylinder are fitted to this part, and the engine member and the fuel pipe are fastened together via an iron holder. By wearing the armpit nosule with the seal ring *
A mounting device for a fuel nozzle which is sandwiched from the front and back between the opposing surfaces of the underarm engine member and the fuel pipe through the 0 cylinder.