CN201554535U - An automobile engine exhaust manifold assembly with catalytic converter - Google Patents

Abstract

The utility model discloses a vehicle engine exhaust manifold assembly with a catalyst converter, which comprises an exhaust manifold and a flange, wherein the exhaust manifold comprises an upper shell and a lower shell, the flange is vertically fixedly connected on an input of the exhaust manifold, a three-way catalyst converter and an outlet on the lower shell of the exhaust manifold are fixedly connected into an integrated body through a front conical tube, and an included angle Alpha of an axis line of the three-way catalyst converter and a projection line of a fixing connecting surface of the exhaust manifold is an obtuse angle. The vehicle engine exhaust manifold assembly with the catalyst converter has the advantages that because the catalyst converter and the exhaust manifold are welded into an integrated body, the structure is compact, the National IV discharge standard can be achieved just through first-grade catalysis, thereby meeting the demands of high performance of engines, and reducing the making cost.

Description

An automobile engine exhaust manifold assembly with catalytic converter

technical field

The utility model relates to an automobile engine exhaust system, in particular to an automobile engine exhaust manifold assembly with a catalytic converter.

Background technique

As people pay more and more attention to the environment, the country's requirements for automobile exhaust emissions are becoming more and more stringent. Due to the limited space of the exhaust system of the existing longitudinal engine, the catalytic converter is generally arranged under the body floor. Commonly known as chassis type. But the disadvantage is that the catalyst is far away from the outlet of the exhaust manifold. Single-stage catalysis cannot meet the cold start requirements of National IV emission (National Phase IV motor vehicle emission standards), and two-stage catalysis is required, resulting in high product cost. .

Contents of the invention

The purpose of the utility model is to provide an automobile engine exhaust manifold assembly with a catalytic converter, which has a compact structure, can meet the high performance requirements of the engine, meet the national IV emission standard, and has low cost.

An automobile engine exhaust manifold assembly with a catalytic converter according to the utility model comprises an exhaust manifold composed of an upper casing and a lower casing, and a flange fixedly connected at the inlet of the exhaust manifold , characterized by:

The three-way catalytic converter is fixedly connected to the outlet on the lower casing of the exhaust manifold through the front cone pipe to form a whole;

The angle α between the axis line of the three-way catalytic converter and the projection line of the fixed connection surface of the exhaust manifold is an obtuse angle.

The exhaust manifold assembly of an automobile engine with a catalytic converter also includes a first heat shield bracket connected to the upper casing of the exhaust manifold, a second heat shield bracket connected to the lower casing of the exhaust manifold. Heat shield bracket.

In the exhaust manifold assembly of an automobile engine with a catalytic converter, a front oxygen sensor seat is provided on the front cone pipe of the three-way catalytic converter, and a rear oxygen sensor seat is provided at the outlet pipe of the three-way catalytic converter. The sensor seat and the outlet pipe of the three-way catalytic converter are connected with the outlet flange.

The exhaust manifold assembly of an automobile engine with a catalytic converter is further provided with a catalytic converter heat shield bracket and a catalytic converter auxiliary support frame on the three-way catalytic converter.

The catalytic converter is welded into an integral body with the exhaust manifold through the front cone pipe, so that the catalyst in the catalytic converter is as close as possible to the outlet of the exhaust manifold.

The exhaust manifold adopts two halves of stamping butt welding, and the welding surface of the exhaust manifold is perpendicular to the inlet flange. This design is more convenient for the tightening operation of the exhaust manifold mounting bolts.

The catalytic converter is supported by an auxiliary bracket, which effectively improves the mode of the assembly and avoids resonance between the exhaust manifold and the engine; It is beneficial for the exhaust gas of the engine to evenly flow to the central surface of the catalyst after being guided by the exhaust manifold.

Compared with the prior art, the utility model has the following advantages: because the catalytic converter and the exhaust manifold are welded together, the structure is compact, and only one level of catalysis can reach the national IV emission standard, which meets the high performance requirements of the engine , and lower manufacturing costs.

Description of drawings

Fig. 1 is the front view of the utility model.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further described.

Referring to a kind of automobile engine exhaust manifold assembly with catalytic converter shown in Fig. The blue plate 1, the flange plate is vertically fixedly connected with the inlet of the exhaust manifold; the three-way catalytic converter 6 is fixedly connected as a whole with the outlet on the lower housing of the exhaust manifold through the front cone pipe; the three-way catalytic converter 6 The angle α between the axis line and the projection line of the fixed connection surface of the exhaust manifold is an obtuse angle. It also includes a first heat shield bracket 4 connected to the upper casing 2 of the exhaust manifold, and a second heat shield bracket 12 connected to the lower casing 3 of the exhaust manifold.

The front cone pipe of the three-way catalytic converter 6 is provided with a front oxygen sensor seat 5, and the outlet pipe 9 of the three-way catalytic converter 6 is provided with a rear oxygen sensor seat 8, and the outlet pipe 9 of the three-way catalytic converter 6 is connected to the The outlet flange 7 is connected;

The three-way catalytic converter 6 is also provided with a catalytic converter heat shield bracket 10 and a catalytic converter auxiliary support frame 11 .

The upper casing 2 and the lower casing 3 of the exhaust manifold are first stamped and formed, and then made into a whole by welding to form the exhaust manifold, and then welded on the flange 1, and the flange 1 is passed through 8 pieces of M8 The bolts are attached to the engine block. In order to facilitate the encapsulation of the catalyst, the catalyst is cylindrical and encapsulated in the housing of the catalytic converter 6 through a gasket; the connecting part of the lower housing 3 of the exhaust manifold and the front cone pipe of the catalytic converter 6 adopts a spherical opening design, which is convenient for turning over. Side welding; auxiliary bracket support 11 is designed on the left side of the catalytic converter to improve the modal of the entire exhaust manifold with catalytic converter assembly; the exhaust manifold and catalytic converter are installed on the exhaust manifold with catalytic converter through the heat shield bracket In the assembly, it can effectively prevent the radiant heat of the engine exhaust from damaging the surrounding components; the oxygen sensor seat detects various combustion information in the catalytic converter through the oxygen sensor installed on it; finally, the engine exhaust is introduced and exported through the outlet pipe 9 In the muffler system connected by the flange 7.

Claims (4)

1. An automobile engine exhaust manifold assembly with a catalytic converter, comprising an exhaust manifold consisting of an upper housing (2) and a lower housing (3), and a flange connected to the inlet of the exhaust manifold Disc (1), characterized in that: The flange (1) is vertically fixedly connected to the inlet of the exhaust manifold; The three-way catalytic converter (6) is fixedly connected as a whole with the outlet on the lower housing (3) of the exhaust manifold through the front cone pipe; The included angle α between the axis line of the three-way catalytic converter (6) and the projection line of the fixed connection surface of the exhaust manifold is an obtuse angle. 2. A kind of automobile engine exhaust manifold assembly with catalytic converter according to claim 1, is characterized in that: also comprises the first heat shield support that is connected on the exhaust manifold upper casing (2) (4) Connect the second heat shield bracket (12) on the exhaust manifold lower casing (3). 3. A kind of automobile engine exhaust manifold assembly with catalytic converter according to claim 1 or 2, is characterized in that: the front cone pipe of described three-way catalytic converter (6) is provided with front oxygen The sensor seat (5), the outlet pipe (9) of the three-way catalytic converter (6) is provided with a rear oxygen sensor seat (8), the outlet pipe (9) of the three-way catalytic converter (6) and the outlet flange (7) )connect. 4. A kind of automobile engine exhaust manifold assembly with catalytic converter according to claim 1 or 2, is characterized in that: on described three-way catalytic converter (6), also be provided with catalytic converter heat insulating support (10) and catalytic converter auxiliary support frame (11).

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