Wyniki wyszukiwania - BazTech

1

Team durability test of a 1.3 MW locomotive diesel engine with prototype piston rings

Kaźmierczak Andrzej, Tkaczyk Marcin

Combustion Engines

|

2021

|

R. 60, nr 4

77--82

EN

Objective of this work was to realize a test of durability of railway engine EMD645 with power about 1300 kW. Within the framework of this test were investigated a prototyped piston’s rings with diamond embankment. Piston rings are made of chromium layer with including of diamond powders technology with a porous chromium coating, where in pores is deposited on said diamond powder with a grain size about 1 micron. The work will be carried out of an analysis of collaboration piston-piston rings-cylinder unit in internal combustion engine and an analysis of the use of hard materials (diamond powder) in friction pairs. During work of this unit we can observe wear of piston rings, precisely - of coating which is deposited on ring to prolong service life. After testing of the locomotive engine EMD645 on the basis of the collected results are developed conclusions of the wearing intensity on piston ring and relating them to the requirements for coatings. The work aims to show the possibilities and benefits of the application of new protective coatings on structural elements of the internal combustion engine in order to reduce their wearing, which is consistent with the observed trend of technology development.

2

The numerical calculation module for piston rings & cylinder and research with analysis of the results of the internal combustion engine locomotive during the 85-hour endurance test

Kaźmierczak Andrzej, Borkowska Joanna, Tkaczyk Marcin

Pojazdy Szynowe

|

2019

|

Nr 3

24--34

EN

The piston with piston rings and bearing surface is a self-contained and highly complex tribological system. One of the most widespread global friction pairs traversed by reciprocating a pair of piston rings - cylinder internal combustion engine. Group PRC combustion engine is the solution generating considerable friction. Various researchers estimate the share of friction losses, per node piston rings - cylinder liner, at 19 to 60% of the total friction losses in the combustion engine. This paper describes part of a larger program to reduce wear the set working parts (piston, piston ring and bearing surface). The project is implemented through the development of new designs of piston rings with anti-wear coating that contains synthetic diamond in the form of loose embedded in a coating of chromium (PRC). The aim of the author was to present the methodology used to compute characterized by a particular procedure. In practical use FEM software is used and the FVM. Developed and implemented Piston Rings Calculation Module is compatible with the idea of numerical computational methods is to say: functionally consists in carrying out a calculation of the desire to achieve the exact solution (the nearest is real) by conducting and receiving intermediate solutions (the next).

PL

Tłok wraz z pierścieniami oraz powierzchnią cylindra jest bardzo złożonym zamkniętym systemem trybologicznym. Pierścienie tłoka – cylinder jest jedną z najbardziej globalnie rozpowszechnionych par tarcia silników spalinowych. Para tarcia TPC jest rozwiązaniem wytwarzającym znaczące tarcie w silnikach spalinowych. Różne źródła naukowe określają straty na jeden węzeł spowodowane tarciem pary pierścień-ściana cylindra jako 19 do 60% wartości wszystkich strat tarcia w silniku spalinowym. W tym artykule omówiono część większego programu badawczego mającego na celu zmniejszenie zużycia pracujących elementów (tłok, pierścienie tłoka, powierzchnia cylindra). Projekt ten jest wdrażany w ramach rozwoju nowych konstrukcji pierścieni tłokowych z powłoką zapobiegającą zużyciu, zawierającą syntetyczny diament luźno zatopiony w powłoce chromu (TPC). Celem Autorów było przedstawienie metodologii stosowanej do obliczeń charakteryzującej się określoną procedurą. W praktyce wykorzystuje się oprogramowanie MES oraz MOS. Opracowany i wdrożony moduł obliczeniowy pierścieni tłokowych jest zgodny z ideą numerycznych metod obliczeniowych, to znaczy: funkcjonalnie polega na przeprowadzeniu obliczenia zamiaru uzyskania dokładnego wyniku (najbardziej zbliżonego rzeczywistości) poprzez uzyskanie i wykorzystanie wartości pośrednich.

3

Analysis of influence of using catalyst and polar additives on engine performance and exhaust emission

Tkaczyk Marcin, Skrętowicz Maria, Krakowian Konrad

Combustion Engines

|

2019

|

R. 58, nr 2

3--6

EN

In the paper researches of influence of using catalyst and polar additives on engine performance and emission of exhaust were carried out. The tests were made on diesel engine DuraTorq-TDDi/TDCi 16v with a capacity of 1998cm3 produced by Ford company. Two additives were investigated: FMAX - catalytic additive to fuel and HDOS - polar additive to lubricating oil in different proportions. The results indicated that using tested additives has a positive effect on exhaust composition (lower concentrations of nitrogen oxides, soot and carbon monoxide) and also decreased fuel consumption.