PSI - Issue 20

G.Yu. Zudov et al. / Procedia Structural Integrity 20 (2019) 300–305 G.Yu. Zudov et al. / Structural Integrity Procedia 00 (2019) 000–000

304

5

Similarly, there was performed the analysis of the working capacity of the other elements of the systems, limiting the reliability under the conditions of the North, from the other natural and climatic factors, results of which are summarized in Table 2.

Table 2 - Dependences of relative number of failures of elements of KAMAZ truck systems on climatic temperatures Element name Type of air temperature Functional dependence

Determination coefficient

Electrical equipment Wiring

average

Y=0.0014x2-0.0267x+4.2969 Y=0.0011x2+0.0082x+0.2898

0.98 0.83 0.79

Generator

minimum minimum

Starter

Y=-0.0048x+0.2834

Brake system Brake hoses and tubes

maximum minimum maximum

Y=-6E-05x3+0.0003x2+0.0007x+3.8699

0.99 0.89

Brake valve Compressor

Y=0.0004x2-0.01x+1.2275

Y=-0.009x+0.5731

0.7

Engine Cylinder head gasket

minimum

Y=-0.0021x2-0.1006x+2.8168 Y=0.0002x2-0.0041x+0.6615

0.78 0.96 0.69 0.94 0.94 0.89 0.58

Collector

average

Cylinder head

maximum

Y=-7E-06x3+4E-05x2+0.0012x+0.5739

Internal combustion engine effective

Y=-0.0088x+0.4926

Fuel system Injectors

minimum

Y=0.0009x2+0.0084x+0.4998 Y=0.0004x2-0.0067x+0.5124 Y=0.0002x2+0.0034x+0.6635

Injection pump

average

Fuel tank

maximum

Cooling system Radiator Water pump Steering Steering rods Steering booster Steering booster Suspension Springs Reaction rod Spring bracket

average

Y=0.0002x2+0.0005x+0.9758

0.58

maximum

Y=-0.0042x+0.4336

0.6

minimum minimum effective maximum

Y=0.0005x2+0.0012x+1.2778 Y=7E-05x2-0.0053x+0.2312

0.61 0.84 0.88 0.89

Y=-2E-05x3-0.0002x2+0.0077x+0.3304

Power steering pump

Y=2E-05x2-0.0056x+0.175

minimum

Y=0.0005x2+0.0101x+1.5836 Y=0.0007x2+0.026x+1.4896

0.52

average

0.8

minimum minimum

Y=-5E-05x3-0.0019x2+0.0167x+1.2974 Y=-3E-05x3-0.001x2+0.0066x+0.7151

0.97 0.86

Balancer

4. Conclusion The main climatic factor influencing the working capacity of the studied elements of the KAMAZ truck systems is the air temperature. For most of the elements, the dependences of the number of the failures on the different types of the climate temperature are established. A ranking was made according to the degree of sensitivity to the low ambient temperatures: the power steering pump, the steering booster, the injection pump, the injectors, the generator, the internal combustion engine, the brake tubes and hoses, the collector, the compressor, the brake valve, the starter and electrical wiring.