Lowwear Method of Automobile Engines Operation
Keywords:
bearings of a cranked shaft, lubricant process, lowwear mode, durability of the engineAbstract
Introduces the concept and methodology of solutions to improve resource automobile engines method lowwear operating on the basis of the developed complex theoretical, methodical, technical and experimental control solutions lubricating process and evaluation of wear of crankshaft bearings. Developed and experimentally tested a set of techniques lowwear operation of automobile engines.
Described in detail method of determining the loading conditions lowwear engines developed by the authors using the meter-but - computational complex “Automated evaluation of lubricating process”. Established patterns of change in the experimental wear bearing crankshafts, depending on the load-speed mode of operation of the diesel engine KamAZ-740.14-300. It is concluded that the maximum wear resistance of the bearing is provided by the engine under load in the frequency of rotation of the crankshaft from 45 to 60 % of torque to the crankshaft shaft 10 ... 30% of the nominal values.
It was found that in a real urban and suburban bus NefAZ-5299-08 with the engine KamAZ moves at a speed corresponding maximum wear resistance crankshaft bearings (optimal), an average of 20 % of cases, and raised-term durability (rational) – the average for all transmissions of 52 %. This indicates that there is a reserve increase of durable, due to the predominant operating motor vehicles on lowwear modes. In general, when driving a bus on lowwear rational speeds increase longevity averaged to 16,1 %, and the optimal lowwear – 33,8 %.
A new method for determining the operating conditions lowwear auto-mobile engine requires significantly less labor, time and material resources than using traditional methods of determining the parameters of the process of wear of friction pairs. Ensuring lowwear engine operation of buses and cars in motor transport enterprises may, for example, due to: driver training lowwear way to start and warm-up, as well as driving.
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