JPH0532714U - Exhaust gas purification catalyst device - Google Patents

Abstract

(57) [Summary] [Purpose] The heat storage and heat retention by the heat storage material is not effective, and the catalyst is kept warm at an effective temperature for a relatively long time, and the catalyst function becomes effective immediately after restarting the engine. Expressed in
At the same time, heat is exchanged with a part of the engine cooling water so that the partially cooled water can be effectively used for heating indoors or heating engine combustion intake air. [Structure] An accommodating chamber part of an inner sleeve projecting an inflow port and an outflow port which are connected to an exhaust gas flow passage, is filled with a heat storage material around a holder carrying a metal catalyst in communication therewith. To decorate. Further, the inner jacket and the vacuum layer are held, and the outer jacket is attached and fixed.
The outer peripheral surface of the outer jacket or the inside of the vacuum layer was provided with a water pipe which is separately connected to a part of the cooling water flow passage.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an improvement of the structure of a catalyst device for purifying exhaust gas that is connected to the exhaust pipe of an automobile and is discharged to the outside.

[0002]

[Prior Art]

 Conventionally, various types of exhaust gas purifying catalyst devices of this type have been studied and developed, and some of them have already been put into practical use.

[0003]

[Problems to be solved by the device]

 However, generally used catalysts reach a temperature of about 400 ° C or higher and function effectively. In the above-mentioned conventional techniques, the catalyst is in a cold state immediately after the engine is started, particularly in winter and cold. Therefore, it takes a considerable amount of time to reach the above-mentioned effective temperature at which it works, and naturally, during that time, a large amount of harmful gas (about 70% of the total amount generated before the engine shutdown) occurs. It will be released.

[0006] Therefore, as a countermeasure for this, there is a precatalyzer which is mounted near the engine, for example, in order to obtain the effective temperature for functioning to the catalyst as quickly as possible. However, a sufficiently satisfactory result has not been obtained yet. There was a problem that I could not get.

The present invention has been made in view of the above-mentioned problems of the related art, and the expansion of the joint area formed with the heat storage material allows the catalyst to be used for a relatively long time due to the heat storage and heat retention effect of the heat storage material due to exhaust heat. It keeps the temperature warm and keeps it at an effective temperature, and immediately after the engine is started, it exerts a purifying function quickly, and the heat storage function is further improved by the flow rectifying effect in the enclosure to cool the other engine by exhaust heat. By exchanging heat with a part of the cooling water connected to the water flow path, it can be effectively used for heating indoors or heating engine combustion intake air, etc. It is an object of the present invention to propose an exhaust gas purification catalyst device capable of preventing an excessive temperature rise of the catalyst and / or the heat storage material under high load.

[0006]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention is provided with an inlet and an outlet that are connected to the exhaust gas passage at both ends and have a diameter increased by projecting an inlet and an outlet. At least one tubular tubular holder that carries a metal catalyst in communication with and is filled with a heat storage material around it, and is interleaved with it, and a vacuum layer is held outside the inner jacket to seal the outer jacket. It is attached to and fixed to the outer jacket of the outer jacket or inside the vacuum layer, and a water pipe communicating with a supply port and a discharge port separately connected to a part of the cooling water flow channel is provided. The exhaust gas purifying catalyst device described above is a gist, and further, the enclosure is formed by spirally winding a single corrugated sheet of a metal material or a polymer of a corrugated sheet and a flat sheet. It

[0007]

[Action]

 Since the present invention is configured in this way, the exhaust heat during engine operation is effectively retained by the heat storage material by expanding the joint area with the heat storage material, and even after the engine is stopped, it remains relatively long. The catalyst can be kept warm throughout the period so that it can be maintained at an effective temperature.Therefore, even when the engine is restarted after that, the catalyst substance is above the activation temperature, so that it is purified from the first exhaust gas generated when the engine is restarted. The function is effectively exerted, and at the same time, the heat storage function is further improved by the flow rectification effect in the enclosure, and heat is partially exchanged with the cooling water to make it warm, so that it can be used indoors. It can be effectively used for heating or for heating the combustion air of engine combustion, and can further prevent the catalyst and / or heat storage material from overheating.

[0008]

【Example】

 Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a partial vertical cross-sectional view of an exhaust gas purifying catalyst device of the present invention, and FIG. 2a is a horizontal cross-sectional view of a single enclosure of FIG. 2B is a cross-sectional view of another embodiment of FIG. 2A, and FIG. 3 is a view corresponding to FIG. 1 according to another embodiment, (1) is an inner jacket, and both ends of the heat source by the exhaust gas. It has an inflow port (2) and an outflow port (3) connected to an inflow passage (not shown), and a storage chamber (1 ') having an enlarged diameter in the center thereof. Then, a corrugated sheet made of, for example, a metallic material (FIG. 2a), which carries a metal catalyst in communication with the inflow port (2) and the outflow port (3) in the storage chamber part, or a polymer of the corrugated plate and the flat plate ( At least one cylindrical tubular holder (10) according to FIG. 2b) is internally wrapped with a heat storage material (5) filled and interposed around it. (4) is an outer jacket, which holds the vacuum layer (6) outside the inner jacket (1) and adheres and fixes it in a hermetically sealed manner. (9) is a water pipe, which is located on the outer peripheral surface of the mantle (4) (Fig. 1) or the inside of the vacuum layer (6) (Fig. 3) and is a part of the external cooling water for engine cooling. It is provided so as to communicate with a supply port (7) and a discharge port (8) connected to a passage (not shown) so that heat can be exchanged by the exhaust heat in the flow passage.

[0009] In the figure, solid arrows indicate the flow direction of the heat source of the exhaust gas, and two-dot chain line indicates the flow direction of a part of the cooling water.

[0010]

[Effect of the device]

 As described above, the exhaust gas purifying catalyst device according to the present invention effectively increases the joint area between the enclosure (10) and the heat storage material (5) to effectively retain heat in the heat storage material due to exhaust heat. The vacuum layer (6) keeps the catalyst warm for a relatively long time even after the engine is stopped and keeps it at an effective temperature. Due to the above, the purification function can be effectively exerted from the first exhaust gas generated when the engine is restarted, and the heat storage function is further improved by the flow regulation effect in the enclosure (10). By partially exchanging some cooling water in the water pipe (9), the partially cooled water that has been warmed can be used effectively for indoor heating or for heating engine combustion intake air. And / or it is possible to prevent excessive temperature rise of the heat storage material. A gas purification catalyst unit.

[Brief description of drawings]

FIG. 1 is a partial vertical sectional view of an exhaust gas purifying catalyst device of the present invention.

FIG. 2a is an enlarged cross-sectional view of the single wrapping body of FIG.

2b is a cross-sectional view of another embodiment of FIG. 2a.

FIG. 3 is a view corresponding to FIG. 1 according to another embodiment.

[Explanation of symbols]

 1 Inner jacket 1'Storage chamber 2 Inlet 3 Outlet 4 Outer jacket 5 Heat storage material 6 Vacuum layer 7 Supply port 8 Discharge port 9 Water pipe line 10 Enclosure

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification number Office reference number FI technical display location F01N 5/02 G 7114-3G K 7114-3G

Claims (2)

[Scope of utility model registration request] 1. An inner jacket (1) having a diameter increased by projecting an inflow port (2) and an outflow port (3) which are connected to an exhaust gas flow passage at both ends.
In the storage chamber (1 ') of the above, at least one tubular tubular holder (10) communicating with the inlet and the outlet and carrying a metal catalyst is filled with a heat storage material (5) and interposed. And interior
A vacuum layer (6) is held on the outside of (1) to cover and fix the outer jacket (4) in a hermetically sealed manner. An exhaust gas purifying catalyst device, characterized in that a water pipe (9) communicating with a supply port (7) and a discharge port (8) connected to a cooling water flow path of the section is provided. 2. The wrapping body (10) according to claim 1.
An exhaust gas purifying catalyst device comprising: a corrugated sheet made of a metal material, or a spirally wound corrugated sheet made of a polymer of a corrugated sheet and a flat plate.