Wyniki wyszukiwania - BazTech

1

Internal combustion engine cooling system with elevated coolant temperature research on the model test stand

Krakowski R.

Journal of KONES

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2013

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Vol. 20, No. 4

177--183

EN

In the paper a model test stand designed and built using original components of diesel engine 4CT90 is presented. The stand provides working conditions as close as possible to the exploitation conditions of the engine cooling system. This applies both to the intensity of heat inside the cylinders of the engine, the temperature uniformity along the cylinder axis, as well as variable-speed water pump. Research carried out on the model stand were aimed at checking the operation of the cooling intensity control with varying levels of filling of the cooling system and develop a control method of the cooling system before testing on the dynamometer stand. In addition, system operation at elevated cooling liquid pressure for the possibility of obtaining the elevated coolant temperature were checked. The influence of working conditions on the level of the temperature was also analysed. In this paper, the characteristics selected for two values of pressure, for 0.15 MPa and 0.2 MPa, and for two different values of the degree of filling of the cooling liquid were presented. During the warming-up and continuous heating of the cylinder and the cylinder head by electrical heaters, temperature and overpressure courses before and after the liquid radiator, temperature before the inlet and outlet of the liquid from the engine and the temperature at selected points inside the engine water jacket are designated. The results of measurements of the coolant pump flow at different speed water pump were also presented in this paper.

2

Effect of elevated coolant temperature on the exhaust composition of piston internal - combustion engine

Krakowski R.

Journal of KONES

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2012

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Vol. 19, No. 2

263-270

EN

There is a tendency to increase the economic efficiency of engine operation and energy efficiency and reduce emissions of toxic combustion products. One way to reduce emissions of toxic components in exhaust gases is raising the coolant boiling point, which requires the simultaneous increase in pressure in the cooling system. Previous studies suggest that such a system can reduce the amount of toxic components in exhaust gases, particularly at low engine load when the engine exhaust temperature is too low to make effective catalytic action. The paper presents the model and experimental test stands to research the cooling system at an elevated temperature of the coolant. The speed and load characteristics of the standard cooling systems and pressure were presented. The research results were designed to determine the effect of elevated temperature in the cooling system on the composition of the gases. The characteristics of the external speed and load were performed with standard cooling systems and pressure. When performing velocity characteristics of the engine was loaded up in the whole range of engine speed from 1000 to 4000 rev/min, while the load characteristics were performed for different values of torque at constant speed in the range from 1500-4000 rpm. The results confirmed the benefits of increasing the temperature of the coolant. The presented characteristics that apply pressure cooling system reduces the amount of toxic components in exhaust gases, particularly at low engine load, in which the engine operates most often in urban conditions.

3

Kompleksowy model nowej generacji układu chłodzenia silnika spalinowego

Kneba Z.

Silniki Spalinowe

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2007

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R. 46, nr SC1

160-169

PL

Przedstawiono tendencje w konstrukcji układów chłodzenia i dostępne komercyjne metody modelowania pracy układu chłodzenia. Przeprowadzono obliczenia symulacyjne temperatury cieczy komercyjnym programem komputerowym AmeSIM i porównano wyniki z pomiarami wykonanymi na hamowni podwoziowej. Opisano wybrane procesy wymiany ciepła występujące w układach chłodzenia. Przedstawiono ogólny model elementu cieplnego w postaci grafów wiązań (GW). Zaproponowano model GW układu chłodzenia silnika spalinowego. Opisano procedurę przejścia od modelu graficznego w postaci GW do modelu matematycznego w postaci Równań Stanu (RS). W ostatnim rozdziale zamieszczono wyniki dla przykładowej symulacji za pomocą zaproponowanego modelu układu chłodzenia w konwencji GW.

EN

In the paper the development of internal combustion engine cooling system was presented. The coolant temperature calculations using AmeSIM software has been performed. Their result was compared with measurement on chassis dynamo. Among cooling system elements are some energy storage elements and some dissipating thermal energy elements. The basic physical dependences in engine cooling system have been described. The model using Bond Graphs was proposed. The procedure of state equation processing from graphs was described. One detailed model consisting of metal elements, coolant elements and oil circuit were introduced. In the last chapter example simulation results using the model were presented.

4

Organiczna technologia płynów chłodzących dla silników gazowych.Jaka korzyść?

Deteree D.

Silniki Spalinowe

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2006

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R. 45, nr 2

73-77

PL

W artykule przedstawiono wyniki badań wpływu zastosowania płynu chłodzącego Coolelf Supra na stan wybranych części konstrukcyjnych silnika po jego długotrwałej eksploatacji. Stwierdzono, że płyn chłodzący ze składnikami organicznymi powoduje mniejsze zużycie tych elementów i poprawę właściwości chłodzących, co prowadzi do wydłużenia okresu eksploatacyjnego. Wskazano na przydatność systemu Total Dagofluid do monitorowania usterek silnika podczas jego pracy i serwisowania.

EN

Results of investigation of fluid coolant Coolelf Supra application on some engine parts in long-time running conditions have been presented in the paper. It was recognized, that organic additive coolant technology leads to smaller wear of engine parts, better cooling performance and longer engine life. The suitability of the "Diagofluid" system for monitoring of engine running or maintenance troubles has been stated.