THE COMPOSITION OF THE PNEUMATIC SYSTEM FOR LOCAL MULTI-CIRCUIT COOLING ON AUTO TRACTOR DIESEL PARTS JUSTIFICATION

Abstract

A series of motor bench and non-motorized experiments conducted at the Department of Engines and Hybrid Power Plants of NTU "KhPI" showed the high efficiency of local air cooling of heat-stressed parts of internal combustion engines, in particular, parts of the exhaust valve assembly of the gas distribution mechanism in an automated mode. However, in the tests carried out, a stationary air compressor powered by a ~220 V mains was used with air accumulation in a large-capacity cylinder. The implementation of a local cooling system on power plants, mainly powerful trucks, requires the inclusion in the automatic control system of autonomous cooling, a pneumatic compressor installed on the vehicle with an electric drive, powered by the on-board power supply and accumulating air in a receiver with compact dimensions.
 A review of design solutions and analysis of the component composition of pneumatic systems of autotractor vehicles was carried out. The requirements for the quality and safety of pneumatic systems of vehicles and their elements are considered. The technical characteristics of air compressors are presented. The scheme of the pneumatic system of local multi-circuit cooling on autotractor diesel parts has been chosen. On the example of the selected air compressor with an electric drive Maximum Performance 24V from ARB (Australia), estimates were made of the operating time up to a working pressure in the receiver of 10 bar. The electrical load on the 24 V on-board network of the vehicle was determined in the form of an average current consumption per filling cycle. The maximum current consumption by the compressor is determined, the current consumption per hour is estimated under the condition of a proportional alternation of the cycles of filling the receiver and emptying it.