JPS62717A - Structure of combustion device - Google Patents

Abstract

PURPOSE:To make an effective heating of gasified fuel and enable a positive heating of the fuel to be effected by a method wherein an ignition glow plug passing through a flow regulator wall plate and projected into a combustion chamber is arranged and a gasification fuel passage is arranged between the fuel nozzle of the flow regulator plate and the ignition glow plug. CONSTITUTION:Fuel gasified in a gasification chamber 2 is sucked into a combustion chamber 7 through an narrow elongated passage of a flow regulator plate 6. In particular, when a large amount of gasified fuel is flowed into the combustion chamber 7 along a fuel nozzle 3, it may directly contact with the exothermic part of the ignition glow plug 8, so that the gasified fuel is efficiently heated and reaches an ignition temperature and then ignited in a short period of time. In this case, the outer tube 3c of the fuel nozzle 3 may guide the flow of gasified fuel directing from the gasified fuel passage 19 toward the fuel chamber 7 and at the same time the outer tube 3 is heated by a heating plug 5, so that the temperature of the gasified fuel is prevented from being decreased. The exothermic part of the ignition glow plug 8 is extended along the outer tube 3c, the time when the gasified fuel is contacted with the ignition glow plug 8 is long, and the temperature becomes sufficiently high, with the result that the gasified fuel is positively ignited.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to the structure of a combustor used for engine acceleration of a vehicle engine.

[Prior Art] The present applicant has already provided a combustor and a heat exchanger in the intake pipe of an engine in Japanese Patent Application No. 59-213156, etc., and mixed combustion gas from the combustor and intake air and sent the mixture to the engine. The company has filed an application for a warm-up device that does this. According to this warming device, the temperature of the intake air is increased, so that the warm-up time can be shortened and the vehicle interior can be rapidly heated by the heat exchanger.

As shown in FIG. 3, in the combustor according to the above application, a fuel nozzle 3 consisting of an inner tube 3b and an outer tube 3c is supported through a rectifying wall plate 6, and fuel is supplied from a fuel supply tube 4a to an inner tube 3b. The fuel is heated by a vaporizing heating plug 5 made of a glow plug, flows into the outer tube 3C, and is ejected from the injection port 3a into the vaporizing chamber 2. The fuel vaporized in the vaporization chamber 2 is sent to the combustion chamber 7 through a narrow passage in the rectifying wall plate 6, and is sent to the combustion chamber 7 through the ignition glow plug 8.
It is designed to be heated and ignited. However, the flow of vaporized or atomized fuel, the flow of combustion air, the pressure inside the combustion tube 17, etc. change depending on engine cranking and engine speed immediately after startup, so conditions suitable for ignition are not met. is difficult to obtain, and the fuel may be sucked into the engine without being heated and ignited.

[Problems to be Solved by the Invention] In view of the above-mentioned problems, an object of the present invention is to provide a combustor structure that improves ignitability by increasing the heat transfer efficiency between the ignition glow plug and the vaporized fuel. Our goal is to provide the following.

[Means for Solving the Problem] In order to achieve the above object, the configuration of the present invention is such that a rectifying wall plate is fitted and fixed inside a combustion tube to partition a combustion chamber and a vaporization chamber, and A fuel nozzle with an opening nozzle hole is disposed, an ignition glow plug is disposed that penetrates the straightening aV plate and protrudes into the combustion chamber, and the fuel nozzle of the straightening wall plate and the ignition glow plug are arranged. A vaporized fuel passage is provided between the two.

[Function] An ignition glow plug 8 is supported by the rectifying wall plate 6 adjacent to the fuel nozzle 3 which is supported through the rectifying wall plate 6 at an angle to the fuel nozzle 3, and a vaporized fuel passage is provided between the two. 19, when the vaporized fuel v2 flows into the combustion chamber 7 along the fuel nozzle 3 through the vaporized fuel passage 19, it is heated by the ignition glow plug 8 and ignited reliably.

[Examples of the Invention] The present invention will be described based on Examples. FIG. 2 is a schematic diagram of an intake system of an engine 35 equipped with a combustor 36 for rapid heating of the passenger compartment and shortening of warm-up time. The air sucked in from the air cleaner 31 is an intake! ! 33 switching valve 3
2, the fuel is supplied to the combustor 36 via the intake bypass pipe 34, where it is used for combustion of fuel supplied via the conduit 30 from the fuel pump 29 attached to the engine 35, and this combustion gas and excess air are The air is supplied from a connecting pipe 34a, which is a part of the intake bypass pipe, to a water passageway 35 via a heat exchanger 37. At the same time, the heating air sent from the intake duct 38 to the heat exchanger 37 passes through the blow-off duct 39 and is sent to the single-chamber blow-off port 41 by the blower 4o.

As shown in FIG. 1, the combustor 36 includes an intake bypass pipe 34
The outer cylinder 12 is connected to the peripheral wall of the outer cylinder 12. This outer cylinder 1
One end (left end) of the fuel cylinder 2 is closed by the end wall plate 12a, while the other end is bent radially inward and connected to the end of the fuel cylinder 17. A combustion cylinder 17 made of, for example, ceramics is supported inside the outer cylinder 12. This combustion tube 17
The left end is closed by an end wall plate 12a, while the right end is provided with an exhaust port 9.

According to the present invention, the rectifying wall plate 6 made of a ceramic honeycomb structure is fitted and fixed in the middle part of the combustion 1117,
This partitions the vaporization chamber 2 and the combustion chamber 7. The rectifying wall plate 6 is provided with a plurality of narrow passages that communicate the vaporization chamber 2 and the combustion chamber 7, and a cylindrical fuel nozzle 3 is penetrated and supported approximately at the center of the rectifying wall plate 6. The fuel nozzle 3 penetrates the end wall plate 12a and projects to the outside. fuel nozzle 3
consists of an inner tube 3b and an outer tube 3C, and a heating plug 5 is attached to the inner tube 3b.
is supported. A fuel supply pipe 4a is connected to the inner pipe 3b,
A conduit 3o shown in FIG. 2 is connected to this. A nozzle hole 3a opening into the vaporization chamber 2 is provided in the peripheral wall of the outer tube 3C.

An air chamber 21 communicating with the intake bypass pipe 34 is formed between the outer cylinder 12 and the combustion cylinder 17, and this air chamber 21 is connected to the vaporization chamber 2 and the combustion chamber 2 through intake ports 15 and 16 provided in the peripheral wall of the combustion chamber 18117, respectively. It communicates with the combustion chamber 7. End wall board 12
An ignition glow plug 8 is supported by the rectifier wall plate 6 and the rectifier wall plate 6, and its tip portion passes through the rectifier wall plate 6 and projects into the combustion chamber 7.

According to the present invention, the fuel nozzle 3 is supported penetrating approximately the center of the rectifying wall plate 6, and the ignition glow plug 8 is supported by the rectifying wall plate 6 while being inclined toward the fuel nozzle 3. and the ignition glow plug 8! A vaporized fuel passage 19 is provided in the first flow wall plate 6 . This vaporized fuel passage 19 has a sufficiently larger passage area than the elongated passage provided in the rectifying wall plate 6, and passes through one vaporized fuel passage from the vaporization chamber 2 to the combustion chamber 7 along the fuel nozzle 3. It is configured such that a larger amount of vaporized fuel flows than the portion.

Next, the operation of the combustor according to the present invention will be explained. At the same time as the engine starts, intake air is drawn into the air space 21 from the intake bypass pipe 34, and is drawn into the vaporization chamber 2 through the intake port 15 of the combustion tube 17, and into the combustion chamber 7 via the intake port 16, and then into the combustion chamber 7 through the intake port 16. 9 to the heat exchanger 37 via the connecting pipe 34a (FIG. 2). Further, the fuel supplied from the fuel supply pipe 4a to 1!3b of the fuel nozzles 3 is supplied to the heating plug 5.
The gas is heated by the gas, enters the outer tube 3C, and is ejected from the nozzle hole 3a into the vaporization chamber 2. The inner pipe 3b detours the fuel to the high-temperature combustion chamber 7 and guides the fuel to the nozzle hole 3a of the outer pipe 3C.

The fuel vaporized in vaporization chamber 2 is 8! The vaporized fuel is sucked into the combustion chamber 7 through the long and narrow passage in the wall plate 6, especially through the vaporized fuel passage 19.
When a large amount of vaporized fuel flows into the combustion chamber 7 along the fuel nozzle 3 at the part shown in FIG. It is ignited within. In this case, fuel nozzle 3
The outer tube 3C guides the flow of vaporized fuel from the vaporized fuel passage 19 to the fuel chamber 7, and the outer tube 3C
Since it is heated by , it works to suppress the temperature drop of the vaporized fuel.

The heating part of the ignition glow plug 8 is the outer pipe 3 of the fuel nozzle 3.
Since it extends for a long time along C, the time for the vaporized fuel to contact the ignition glow plug 8 is long, the temperature becomes sufficiently high, and the vaporized fuel is reliably ignited.

In this way, it is heated and ignited by the heat generating portion of the ignition glow plug 8 to start combustion, and is sucked into the heat exchanger 37 from the exhaust port 9 while being mixed with excess air from the intake port 16 . The fuel is heated at the protrusion of the fuel nozzle 3 into the combustion chamber 7, and the radiant heat from the rectifying wall plate 6 heated from the combustion chamber side promotes vaporization of the fuel injected into the vaporization chamber 2. Although the heat in the combustion chamber 7 is transferred to the vaporization chamber 2 via the rectifying wall plate 6, the flame of the combustion v7 does not blow out into the vaporization chamber 2 considering the pressure drop rate of the streamline. The rectifying wall plate 6 withstands the high temperature of the combustion chamber 7 and maintains the temperature of the vaporization chamber 2 at a high temperature.

As mentioned above, once the vaporized fuel drawn into the combustion chamber 7 via the rectifying wall plate 6 is ignited, the rectifying wall plate 6 is heated by the combustion heat of the combustion chamber 7, and the radiant heat from the rectifying wall plate 6 Since the vaporization chamber 2 is maintained at a high temperature, the fuel ejected from the nozzle hole 3a of the fuel nozzle 3 into the vaporization chamber 2 can be vaporized even if the heating tap 5 and the ignition glow plug 8 are turned off.

[Effects of the Invention] As described above, the present invention supports the fuel nozzle and the ignition glow plug at an angle to the fuel nozzle on the rectifying wall plate, and further provides the vaporized fuel passage between the two, so that there is no flow from the vaporized fuel passage. The vaporized fuel heading to the combustion chamber is effectively heated, and the temperature control device for the ignition glow plug and the combustion air IIJ are extremely advanced.
Although it is not equipped with a TLL device, it can be ignited reliably within a short time. Therefore, the time for energizing the fuel vaporization heating plug and ignition glow plug is shortened, resulting in reduced power consumption, avoiding consumption of the power source battery, and the durability of the fuel vaporization heating plug and ignition glow plug. will be extended.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view showing the structure of a combustor according to the present invention;
FIG. 2 is a schematic diagram of the FIII device of an engine equipped with the same combustor, and FIG. 13 is a side sectional view showing the structure of a conventional combustor. 2: Evaporation chamber 3: Fuel nozzle 3a: Nozzle hole 5: Heating plug 6:! I flow wall plate 7: Combustion chamber 8: Ignition glow plug 17: Combustion 11131: Air cleaner 33: Intake pipe 34: Intake bypass pipe 36: Combustor

Claims (3)

[Claims] (1) A rectifying wall plate is fitted and fixed inside the combustion cylinder to partition the combustion chamber and the vaporization chamber, a fuel nozzle equipped with an injection hole opening into the vaporization chamber is arranged, and the rectifying wall plate is fitted and fixed inside the combustion cylinder. A structure of a combustor, characterized in that an ignition glow plug is provided that penetrates and projects into the combustion chamber, and a vaporized fuel passage is provided between the fuel nozzle of the rectifying wall plate and the ignition glow plug. (2) The combustor structure according to claim (1), wherein the rectifying wall plate is made of ceramic having a honeycomb structure. (3) The combustor structure according to claim (1), wherein an intake port is provided in the peripheral wall of the combustion tube, and an exhaust port is provided in the end wall of the combustion tube.