JPH0622518U - Exhaust gas purification catalyst container - Google Patents

Abstract

(57) [Summary] [Purpose] It is an object of the present invention to provide a catalyst container capable of satisfactorily preventing catalyst performance deterioration. [Structure] A stopper 5 is provided on an upper portion of a catalyst 2 housed in a container 1, and the catalyst 2
A spring 4 is provided on the lower surface side of the catalyst 4, and when the exhaust gas pressure increases, the spring 4 contracts and the catalyst 2 can be moved to the downstream side of the exhaust gas.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to improvement of a container equipped with a catalyst for purifying exhaust gas.

[0002]

[Prior art and its problems]

 Conventionally, as shown in FIG. 3, a cylindrical container 51 is internally provided with a fixed catalyst 52 for purifying exhaust gas. As shown in FIG. 4, this container 51 has an engine exhaust manifold. It is provided close to the downstream side of 53. In such a conventional catalyst container, since the catalyst 52 is fixed inside the container 51, when the exhaust gas has a high temperature during high engine load, the catalyst 52 is placed in the exhaust manifold 53. However, since the exhaust gas of a high temperature causes the catalyst 52 to reach a high temperature, the performance of the catalyst 52 deteriorates.

[0003]

[Means for Solving the Problems]

 The present invention has been made in view of the above conventional problems, and an object thereof is not to provide a catalyst container capable of reducing deterioration of catalyst performance, and the gist thereof is an internal exhaust gas purification catalyst. In the catalyst container that houses the exhaust gas and is arranged on the downstream side of the exhaust manifold, a stopper is provided to project upstream of the catalyst in the catalyst container, and the exhaust gas pressure increases on the downstream side of the catalyst. A spring is provided that is pressed at times to move the contracting catalyst downstream.

[0004]

[Action]

 A stopper is installed on the upstream side of the catalyst in the container, and a spring is installed on the downstream side of the catalyst.When the exhaust pressure of the engine is high, the catalyst receives the exhaust pressure and pushes the catalyst to the downstream side. As the spring provided on the bottom surface of the catalyst contracts, the catalyst moves to the downstream side of the exhaust gas in the container, and this movement moves the catalyst away from the exhaust manifold. It becomes difficult to receive, and the deterioration of catalyst performance is prevented.

[0005]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings. 2 is a vertical sectional view of the container of this example, and FIG. 1 is a horizontal sectional view of FIG. In the figure, the lower portion of a cylindrical container 1 is a lower curved portion 1a that is curved inward, and a catalyst 2 that can purify exhaust gas is stored in the container 1. On the inner periphery of the container 1 on the upper surface side (upstream side) of the catalyst 2, four stoppers 5, 5, 5, 5 are provided so as to project inward along the inner periphery at predetermined intervals. The stoppers 5, 5, 5 prevent the catalyst 2 from being pulled out upward, and a pressure receiving portion 3 is provided between the stoppers 5, 5, 5, 5 and the upper surface of the catalyst 2. The pressure receiving portion 3 is formed in a structure that receives the pressure of the exhaust gas, and the pressure receiving portion 3 is formed in a shape surrounding the outer periphery of the catalyst 2.

Further, springs 4, 4, 4, 4 are vertically provided on the lower surface (downstream side) of the catalyst 2, and the springs 4, 4, 4, 4 are arranged along the inner peripheral surface of the container 1. 4 are provided at a predetermined interval at positions facing the stoppers 5, and the lower ends of the springs 4, 4, 4, 4 are fixed to the inner circumference of the container 1. The upper ends of the springs 4, 4, 4, 4 are in contact with the lower surface of the catalyst 2 via the pressure receiving portion 3, and the springs 4, 4, 4, 4 are resistant to pressing force from above. The catalyst 2 can be further contracted, and by contracting the springs 4, 4, 4, 4 the catalyst 2 can move downward (downstream of exhaust gas) along the inner circumference of the container 1.

In such a structure, when the exhaust gas pressure increases under high engine load, the exhaust gas pressure is received by the pressure receiving portion 3, which causes the spring 4 to contract due to the pressing force from above. The catalyst 2 will move to the downstream side of the exhaust gas, and the catalyst 2 will move to a position away from the exhaust manifold, that is, the catalyst 2 will move to a position away from the exhaust gas outlet of the engine, and that much hot exhaust The influence of the manifold is reduced, the temperature of the catalyst 2 does not rise, and the performance deterioration of the catalyst 2 is reduced.

[0008]

[Effect of device]

 The present invention relates to a catalyst container in which an exhaust gas purifying catalyst is housed inside and which is arranged downstream of an exhaust manifold, in which a stopper is provided projecting upstream of the catalyst in the catalyst container and By installing a spring on the downstream side of the engine, which is pressed when the exhaust gas pressure increases and moves the catalyst to the downstream side, high-pressure exhaust gas is generated when the exhaust gas temperature becomes high during high engine load. In response to the gas pressure of the gas, the catalyst is pressed to the downstream side, the spring contracts, and the catalyst can move to the downstream side.This movement moves the catalyst away from the hot exhaust manifold, and the catalyst becomes hot. And has the effect of maintaining good performance. Further, when the pressure of the exhaust gas is low, the catalyst is arranged at a fixed position on the upstream side by the biasing force of the spring, and a good catalyst function can be exhibited.

[Brief description of drawings]

FIG. 1 is a cross-sectional configuration diagram of a container containing a catalyst.

FIG. 2 is a vertical cross-sectional configuration diagram of a container.

FIG. 3 is a vertical cross-sectional configuration diagram of a conventional container.

FIG. 4 is a schematic configuration diagram showing an arrangement position of a container.

[Explanation of symbols]

 1 container 2 catalyst 3 pressure receiving part 4 spring 5 stopper 53 exhaust manifold

Claims (1)

[Scope of utility model registration request] 1. A catalyst container having an exhaust gas purifying catalyst housed therein and arranged downstream of an exhaust manifold, wherein a stopper is provided projecting upstream of the catalyst in the catalyst container, and the catalyst is An exhaust gas purifying catalyst container is provided on the downstream side thereof with a spring that is pressed when the exhaust gas pressure increases to move the catalyst toward the downstream side.