Automobile exhaust system hot end support

Abstract

An automobile exhaust system hot end support is used for being connected with a three-way catalyst shell. The automobile exhaust system hot end support comprises a support body, a strap and a fastening bolt, wherein the strap surrounds the three-way catalyst shell to be connected with the fastening bolt into a hoop, and the fastening bolt penetrates through the support body to be connected with the two ends of the strap so that the support body can be fixed to the three-way catalyst shell. Due to the fact that the support is directly connected with the three-way catalyst shell, the problem that the space in an engine cabin is small is effectively avoided. Due to the fact that the support is directly connected to the three-way catalyst shell and is very close to an engine cylinder block, the rigidity of the whole system is effectively improved, the first-order frequency of the system is increased to be higher than 200 Hz, resonance of an engine within 6000 RPM is avoided, and the fatigue life of the whole system is effectively prolonged.

Description

technical field [0001] The invention relates to a test device, in particular to a hot end bracket of an automobile exhaust system. Background technique [0002] Traditional brackets are welded to the catalytic converter shell, and the welding heat can easily damage the liner of the three-way catalytic converter, resulting in a high product scrap rate. Due to the narrow space in the engine compartment, the location of the mounting holes is limited, and it is difficult to arrange the brackets. The bracket is fixedly connected to the three-way catalytic converter, and the tolerance accumulated in the system cannot be adjusted, resulting in excessive installation prestress and reducing the vibration fatigue life of the parts. Due to the fixed connection between the bracket and the shell, the thermal stress caused by the thermal expansion of the system cannot be released, and the thermal fatigue life will be reduced. Contents of the invention [0003] The object of the presen...

AI Technical Summary

Problems solved by technology

[0002] Traditional brackets are welded to the catalytic converter shell, and the welding heat can easily damage the gasket of the three-way catalytic converter, resulting in a high product scrap rate

Due to the narrow space in the engine compartment, the location of the mounting holes is limited, and the bracket arrangement is difficult

The bracket is fixedly connected with the three-way catalytic converter, and the tolerance accumulated in the system cannot be adjusted, resulting in excessive installation prestress and reducing the vibration fatigue life of the parts

Due to the fixed connection between the bracket and the shell, the thermal stress caused by the thermal expansion of the system cannot be released, and the thermal fatigue life will be reduced

Images