Abstract
Improving the exploitative and environmental performance of piston engines (PICE) is an urgent task for many engineers and scientists. The article presents the results of the upgrade of a gas-and-air system of a diesel PICE, carried out through changing the turbocharging system’s configuration and modernizing the design of the admittance collector. The authors present a review of studies on the given subject and a description of the object of the research. The study was conducted on the basis of bench tests at a manufacturing plant and mathematical modeling using ACTUS program. The results of experimental studies on the main indicators of a basic and upgraded PICEs are presented. The gas exchange processes in the PICE under examination were studied in detail using mathematical modeling. For the given diesel PICE, improvement of the gas-and-air system leads to a growth in charging efficiency by 2.45-3.92%, a decrease in scavenging factor by 3.11-6.31% and a reduction of specific fuel consumption up to 3.33%. In the conclusion, new directions for increasing the efficiency of the given PICE are offered.
Highlights
Today, piston internal combustion engines (PICE) are some of the most convenient and mobile sources of energy
Effective application of turbocharging system (TCS) in diesel PICE has revealed a number of problems and the tasks for further improvement of gas-and-air systems (GaAS)
The minimum values of α for the initial diesel PICE are close to engine smoking, which was observed visually during
Summary
Piston internal combustion engines (PICE) are some of the most convenient and mobile sources of energy. Efficiency and environmental friendliness of ICE is the main goal in the development of this industry Their performance depends on improving processes in the engine cylinder, and on the quality of the cylinder filled with a working substance and the degree to which said cylinder is clean of end gases [1, 2]. The maximum effect is achieved by the integrated upgrade of the admittance and final systems, TCS adjustment and engine development [21, 22] Such upgrade results in a growth in PICE power by up to 28% and the reduction of specific fuel consumption (SFC) be by 2.54% on average, compared to a basic PICE.
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