JPS5937251A - Gas mixer for use in gas engine - Google Patents

Abstract

PURPOSE:To reduce the man-hour in forming a subsidiary gas passage in the body of a gas mixer, by constituting the subsidiary gas passage by a single drilled hole and a groove formed simultaneously at the time of casting the body of the gas mixer. CONSTITUTION:A subsidiary gas passage 17 formed in the body 1 of a gas mixer is constituted by a drilled hole 15 formed to extend from an end face 1a of the gas mixer body 1 located on the side of an engine 13 toward a main gas passage 6 and a groove 16 formed in said end face 1a of the gas mixer body 1 in the manner of communicating the drilled hole 15 and an intake passage 2 with each other. Here, the groove 16 is formed simultaneously at the time of casting the body 1 of the gas mixer to constitute the subsidiary gas passage communicated with the intake passage 2 together with the end face 1a located on the side of the engine 13. Therefore, it is enabled to reduce the man-hour of forming a drilled hole.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a gas puller for a gas engine.

Fig. 1 shows a conventional gas mixer 2 for a gas engine, in which reference numeral 1 denotes the main body of the gas mixer which has an intake passage and 2 penetrated therein, 3 a throttle valve, Hiroshi a venturi, S is a nozzle attached to a venturi S, and the nozzle S is communicated with a main gas passage B formed in a direction perpendicular to the intake passage 2. A main fuel control valve 10 (4) is attached to this main gas passage t.

Also, the main fuel control of passage B to this main gas = fP10 is closer to the nozzle S, and the venturi S of the intake passage 2 is V! 1 having a smaller passage area than the main gas passage 6 between the positions near the throttle valve 3 on the downward flow side;
iiill gas passage 7 is formed. An auxiliary fuel control valve // is attached to this auxiliary gas passage 7. still,
Endogenous gas passages between the main gas passage 6 and the auxiliary gas passage 7 When the engine is idled under high load and high speed, a passage for gaseous fuel to be sprayed from the nozzle S into the intake passage λ. On the other hand, when the engine is rotated through the auxiliary gas passage 7t- at low speed and load (ρ), the heather gas passage 111t 7
This is for extracting gaseous fuel from each evening view and injecting it into the intake air a) L2.

However, this conventional gas mixer requires 2 liters of auxiliary gas.
Thf'R7, gas mixer body l engine / 3
(From the flange lcL of ill to the main gas passage B)
It consists of a vertical drill hole 9 bored from the side surface lb through the horizontal drill hole g toward the intake passage 2, and the outer end of the horizontal drill hole g is fixed with a blind nut 12. Since it was designed to be closed, the number of processing steps required to form the auxiliary gas passage 7 was large, and the shielding cost for the gas mixer itself was correspondingly high.

The present invention is as described above! In view of the problems with conventional gas mixers, we simplified the structure of the auxiliary gas passage and reduced the number of processes, thereby reducing manufacturing and labor costs for the entire device.
X. It was made for the purpose of providing a gas mixer for a gas engine that promotes cost reduction, and is connected to a nozzle provided in the venturi of the intake passage within the main body of the gas mixer. A main gas passage having an illll blood path that is outside the target;
In a gas mixer ν-1 for a gas engine in which a auxiliary gas passage is formed with a relatively small passage surface f:I'f, the auxiliary gas passage is connected to -I'4M of the intake passage of the gas mixer main body. a drilled hole drilled toward the main gas passage from the end face where the hole is 110;
The gas mixer main body l is connected so as to communicate the intake passage.
The ceremonial symbol is that it is composed of a concave groove formed by spinning at +1.

Hereinafter, the gas mixer for gas engines of the present invention will be explained based on the embodiment shown in FIG. is the conventional gas mixer z shown in FIG.
It has almost the same basic configuration as the conventional gas mixer zl, but differs only in the structure of the auxiliary gas passage 7 and the method of forming it. The structure of this sub-gas passage 7 and its formation method will be described in detail below. It should be noted that the configuration of all other parts is the same as the conventional u1, so detailed explanations thereof will be omitted by attaching the same symbols as in FIG. 1.

The gas mixer in which example is a gas mixer main body/
Is it cast? 3 Focusing on the part to be molded, the sub gas passage 7
However, by forming a part of the gas mixer body/(7) at the same time as the li construction and cutting, it is possible to reduce the number of processing steps. That is, the auxiliary gas passage 7 is made to communicate with the perforated hole 15 formed from the end face 1a of the gas mixer main body l on the engine 13 side toward the main gas passage B, and the perforated hole /3 and the intake passage 2. The groove 16 is formed on the end face /a of the gas mixer body, and the groove 16 is formed at the same time when the gas mixer body 1 is cast. Therefore, when the gas mixer main body L is cast, four holes are formed at the same time, so after casting, drill holes are made in the gas mixer 7 so that the grooves 16 and the main gas passage A communicate with each other. l! You can easily form the auxiliary gas passage 7 by simply forming the ! can be done. The concave groove 16 of 1. has its groove inner surface IAa as an as-cast surface. Well used.

Next, to explain the first aspect of the present invention, in the gas mixer for a gas engine of the present invention, the auxiliary gas passage formed in the gas mixer body is formed in the gas mixer body by casting the gas mixer body. Since it is composed of a groove and a drilled hole that are cast simultaneously with the main body, the auxiliary gas passage is drawn with two drilled holes as in the conventional gas puller shown in Fig. 1. Compared to a tax that blindly plugs one end of the drilled hole, the number of processing steps is reduced, and the manufacturing cost can be reduced accordingly.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal side view of a conventional gas mixer, and FIG. 2 is a cross-sectional view of a gas mixer according to an embodiment of the present invention. /, i, , Gas mixer body Ia --- 7 flange surface λ of gas mixer body λ...
・Intake passage 4'1lllla*Venturi j, +*++ nozzle O...1' Gas path 7,,,,, side gas trace path/3. ,-, drill hole/1. ,,, four grooves

Claims (1)

[Claims] X. A main gas passage (6) having a relatively large passage area and communicating with a venturi nozzle (3) of the intake passage (2) in the main body (1) of the gas mixer;
The suction 91 passage (2) branches from the main gas passage (6).
The intake air downstream fl! from the nozzle C3) of An auxiliary gas passage (with a relatively small passage 17ii product) opening at position 11 (
7), the auxiliary gas passage (, 7) is connected to the gas mixer main body (t).
One end of the intake passage (2) of (1) is (7j10 to 9j
A drill hole (/ ,!!') drilled from the d side (/ cL) toward the main gas passage (B) so as to make the drill hole (15) and the intake passage (2) communicate with each other. A concave groove (1) is cauterized on the end face (/a,) of the gas mixer body.
2) Gas mixer for gas engines, inspired by the structure of 6).