Device and method for measuring excitation force of camshaft to cam bearing cover

Abstract

The invention provides a device and method for measuring the excitation force of the camshaft to the cam bearing cap. The device is based on the existing cam bearing cap and is divided into internal components and internal components, and the horizontal and vertical The pressure sensing plate is installed in the direction, the two sides of the horizontal pressure sensing plate are respectively in contact with the plane of the inner and outer members, and the vertical pressure sensing plate is pre-tightened on the top of the inner member through the adjusting bolt on the top of the outer member. The components and adjusting the positional relationship between the bolt and the pressure sensing plate ensure that the excitation force of the camshaft is accurately transmitted to the pressure sensing plate; the method uses the excitation force generated by the measuring device on the camshaft in horizontal and vertical Acquisition is carried out, and according to the calibration relationship, the signal output by the pressure sensing plate is converted to obtain the force data. The invention can accurately measure the horizontal and vertical forces of the cam bearing cover respectively, so as to accurately reflect the excitation force of the camshaft on the cam bearing cover.

Description

Technical field [0001] The present invention belongs to the technical field of engine component force measurement, and in particular, a cam shaft pair cam bearing cover excitation force measuring device and a measurement method are specifically. Background technique [0002] Ordinary engine is upgraded to a boosted engine, and the strength of each component faces a more severe test. When the engine is operating, the cam bearing housing and the bearing cover are one of the most dangerous parts, which determines the reliability of the engine cylinder head. [0003] With the improvement of national regulations and customer requirements, the engine's NVH (Noise, Vibration, Harshness, NOISE, vibration and vibrating roughness) is increasingly concerned. The excitation of the camshaft pair of cam bearing is one of the important excitation sources of engine noise radiation, so the accuracy of the input cam shaft on the cam bearing cover must be ensured when performing engine machine nois...

AI Technical Summary

Problems solved by technology

[0005] 1. When the camshaft rotates, the force on the cam bearing seat is always changing, so the excitation of the camshaft to the cam bearing cover is also multi-directional, including vertical and horizontal forces, as well as bending forces. The strain gauges are located on both sides of the outer sides of the bearing cap, and what they measure is the final resultant force signal, and the force value corresponding to each force direction cannot be obtained;

[0006] 2. Since the strain gauge is a measuring element that responds to the stress situation through force deformation, it is affected by many factors such as vibration, temperature, and sticking direction, while the excitation force of the camshaft on the cam bearing cover is more complicated, and the frequency of change is relatively high. High, so the force error measured by the strain gauge is large;

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