Method for detecting suspension shock absorption performance of automobile power assembly

Abstract

The invention discloses a method for detecting suspension shock absorption performance of an automobile power assembly. The method comprises the steps of pre-test preparation, preload application test and detection of dynamic-static stiffness, and the method is implemented by use of a vibrating test bench which can realize two-shaft linkage as well as a two-shaft linkage test tool. According to the method for detecting the suspension shock absorption performance of the automobile power assembly, the traditional test method is changed, the dynamic-static stiffness in X direction and Y direction is detected under the condition of Z direction preload suspension of the power assembly and the objectivity and the correctness of detection data are ensured; movement interference and prestress can be eliminated and the normal proceeding of the test and the correctness of the detection-test data are ensured; the preload applied by a suspension test of the power assembly can be borne by a machine base of equipment, and a moving shaft and a sensor of the equipment are protected from being damaged by shear force; the problem of component force generated by the preload due to angle generation of arc movement in the prior art is solved, the correctness of the preload is ensured and therefore the correctness of the test result is guaranteed.

Description

technical field [0001] The invention belongs to the detection field of automobiles, and in particular relates to a detection method for the shock absorption performance of automobile powertrain mounts. Background technique [0002] Nowadays, people have higher and higher requirements for the comfort of automobiles. As the most critical shock-absorbing component of automobiles, powertrain mounts have higher performance requirements. The dynamic and static stiffness of the powertrain mount in three directions (X-longitudinal, Y-horizontal, Z-vertical, and the direction is based on the vehicle coordinate system) is a key indicator to determine its shock absorption performance. The size of the three-way dynamic and static stiffness of the suspension needs to be obtained and evaluated through testing. Because the powertrain mount is mounted on the vehicle, its vertical direction has always been subjected to the gravity of the vehicle powertrain (engine and gearbox). In order to ...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a detection method for the damping performance of the automobile powertrain mount, to solve the motion interference between the preload direction and the test direction of the powertrain mount in the prior art, and the problem of the actuating shaft And the long-term radial shear force of the sensor causes equipment damage and inaccurate data measurement

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