JPS6329874Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a mounting device for a fuel nozzle in an engine.

The applicant of the present invention has previously proposed a device of this type that connects a fuel nozzle to the outside of the engine cylinder head, intake manifold, and other engine parts through a holder.
In a type having a fuel pipe connected to the nozzle on the outside, the nozzle is inserted into the insertion hole formed in the front flange of the holder in the seal ring on the outer periphery of the small diameter part on the tip side. We have proposed a type in which the holder is opposed to and pressed into contact with the engine member at the front, but in this case, the pressure contact involves the holder being superimposed on the member at the front flange and the piping described above at the rear flange. In this case, the holder is likely to overlap with the member at the front flange and be subjected to heat from the member through this, which is an inconvenience. .

The purpose of the present invention is to obtain a device free of such inconveniences, and includes a holder 2 having a U-shaped cross section and a front flange 7 and a rear flange 12.
It is fixed to the engine member 1 through a screw 14 on the front flange 7, and a seal ring 6, 1
1, and the nozzle 3 is press-fitted to the shoulder of the fitting hole of the engine member 1 with the front seal ring 6 via the fuel pipe 4 attached to the rear flange 12. In this case, a plate-shaped heat insulating material 9 is interposed between the front flange 7 and the engine member 1, and a fitting hole having a diameter larger than the insertion hole 8 provided in the heat insulating material 9 is provided. It is characterized in that the seal ring 6 is fitted inside.
The engine 1 comprises an engine cylinder head or an intake manifold extending from the engine cylinder head,
The cylinder 6 is pressed against the member 1 by fastening the member 1 and the pipe 4 to each other via the holder 2. To explain further, the nozzle 3
is inserted into the insertion hole 13 formed in the rear flange 12 of the holder 2 in the O-ring 11 fitted to the small diameter part 10 on the tail end side, and faces the piping 4 behind it, and in this state The holder 2 is connected to the member 1 and the pipe 4 at the front and rear flanges 7, 12 with respective screws 14, 14, and this is not particularly different from what was proposed previously.

According to the present invention, as described above, a heat insulating material 9 made of synthetic resin, ceramic, etc. is provided on the outer periphery of the ring 6, interposed between the facing surfaces of the flange 7 and the member 1. In this case, the heat insulating material 9 forms the front wall of the flange 7 and the through hole 8
extends forward inside thereof so that the ring 6 is inscribed and fitted therein, and furthermore, the heat insulating material 9 extends longitudinally in the lateral direction and screws the flange 7 and the member 1 together. 14, it is also possible to intervene in the parts that are connected to each other.

In this way, according to the present invention, the front flange 7
A holder 2 attached to the engine body 1 via
is attached via a plate-shaped heat insulating material 9 interposed between the flange 7 and the engine member 1, so the engine member 1 and the holder 2 can be attached by simple plane machining, and the holder 2 is attached to the engine member 1. Good heat insulation properties are obtained between the fuel nozzle 3 and the fuel nozzle 3 because the seal ring 6 at the front end of the fuel nozzle 3 is fitted into a hole provided in the heat insulating material 9, which has a larger diameter than the insertion hole 8 of the flange 7. Even with the presence of the heat insulating material 9, there is an effect that the pressure contact of the fuel nozzle 3 to the engine member 1 via the seal ring 6 is not obstructed.

[Brief explanation of the drawing]

FIG. 1 is a partially cut-away side view of an example of the present device, FIG. 2 is a top view thereof, and FIG. 3 is a cross-sectional view taken along the line -2. DESCRIPTION OF SYMBOLS 1...Engine member, 2...Holder, 3...Fuel nozzle, 4...Fuel piping, 5...Small diameter part, 6...
...Seal ring, 7...Flange, 8...Insertion hole, 9...Insulating material.

Claims (1)

[Scope of utility model registration request] A holder 2 having a U-shaped cross section and having a front flange 7 and a rear flange 12 is fixed to the engine member 1 via screws 14 provided on the front flange 7, and is provided on the front flange 7 of the holder 2. The front and rear ends of the fuel nozzle 3 are fitted into the insertion hole 8 and the insertion hole 13 provided in the rear flange 12 via seal rings 6 and 11, respectively, and the nozzle 3 is inserted through the fuel pipe 4 attached to the rear flange 12. In the case where the front seal ring 6 is brought into pressure contact with the shoulder of the engine member 1, the front flange 7
A plate-shaped heat insulating material 9 is interposed between the heat insulating material 9 and the engine member 1, and the seal ring 6 is inserted into a hole provided in the heat insulating material 9 that has a larger diameter than the insertion hole 8. Features a fuel nozzle mounting device.