Report-Qingdao Longreen Auto Parts Co.,Ltd.

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Table1 the data of vertical load of air spring

Product type	model	design height（mm）	Vertical load（kN）
Product type	model	design height（mm）	0.7 MPa	0.6 MPa	0.5 MPa	0.4 MPa	0.3 MPa	0.2 MPa
Convoluted	G8064	170	105	88.7	72.8	57.3	42.3	27.4

Table2 the data of vertical static stiffness of air spring

Product type	model	design height（mm）	Vertical stiffness（N/mm）
Product type	model	design height（mm）	0.7 MPa	0.6 MPa	0.5 MPa	0.4 MPa	0.3 MPa	0.2 MPa
Convoluted	G8064	170	1002	865	718	581	453	324

Figure 1 the vertical static stiffness test of air spring

Figure 2 the curve of air spring vertical load

Figure 3 the curve of air spring vertical static stiffness

The vertical load and stiffness of G8064 air spring at design height comply with the technical requirement from Table4 and Table5.
1.1 Maximal Compressed and Extended Test
Set the air spring on the test bench, charge it with 0.7MPa Pressure of air, pull it up to the maximal working height and empress it down to the minimal working height. After 5 cycles, observe whether there are leakage and abnormal deformation. Record the maximal diameter of the air spring at the minimal working height in Table 6. Figure 4 is the photograph of compressed test.

Table6 data of the maximal diameter of air spring

Product type	model	Working height（mm）	maximal diameter（mm）
Convoluted	G8064	130~250	525

Figure 4 the compressed test of air spring