Engine Oil- Crankshaft Interaction Fem Modelling of an Air-Cooled Diesel Engine under Dynamic Severe Functioning Conditions

Taking into account the interaction between the engine oil and the crankshaft to model crankshaft thermomechanical behavior under dynamic loading is very important. In particular, when the crankshaft is working in severe conditions. This paper deal with an air cooled direct injection-type engine crankshaft thermomechanical FEM modelling account for engine oil-cranks half interaction in severe working conditions. As case of application we consider the diesel engine Deutz F8L413. The model takes into account 2 forced convectives heat flux: engine oil and crankcase air. The severe mechanical and thermal characteristics of engine are experimentally measured on a bench test equipped with a hydraulic brake. The temperature distribution inside the crankshaft was computed using the measured temperature as boundary conditions. The most thermo-mechanical stressed zones of the crankshaft have been determined. The fatigue resistance of the crankshaft under thermo-mechanical conditions was examined using Dang-Van multi-axial fatigue criteria. To prove our model efficiency, we have compared crankshaft damage in service to the numerical simulation results. It was found the breakage occurred in an area where the numerical simulations give the highest stresses.

Download Full-text

Engine Oil Effects on Friction and Wear Using 2.2L Direct Injection Diesel Engine Components for Bench Testing Part 2: Tribology Bench Test Results and Surface Analyses

10.4271/2004-01-2005 ◽

2004 ◽

Cited By ~ 2

Author(s):

Simon C. Tung ◽

Michael L. McMillan ◽

Gao Hong ◽

Ewa Bardasz

Keyword(s):

Diesel Engine ◽

Friction And Wear ◽

Direct Injection ◽

Engine Oil ◽

Bench Test ◽

Test Results ◽

Direct Injection Diesel Engine ◽

Engine Components ◽

Bench Testing

Download Full-text

THE EFFECT OF DIESEL-BIODIESEL BLENDS ON THE PERFORMANCE AND EXHAUST EMISSIONS OF A DIRECT INJECTION OFF-ROAD DIESEL ENGINE

Transport ◽

10.3846/16484142.2014.984331 ◽

2014 ◽

Vol 29 (4) ◽

pp. 440-448 ◽

Cited By ~ 6

Author(s):

Tomas Mickevičius ◽

Stasys Slavinskas ◽

Slawomir Wierzbicki ◽

Kamil Duda

Keyword(s):

Diesel Engine ◽

Diesel Fuel ◽

Direct Injection ◽

Engine Performance ◽

Exhaust Emissions ◽

Bench Test ◽

Maximum Pressure ◽

Cylinder Pressure ◽

Biodiesel Blends ◽

Performance And Emission

This paper presents a comparative analysis of the diesel engine performance and emission characteristics, when operating on diesel fuel and various diesel-biodiesel (B10, B20, B40, B60) blends, at various loads and engine speeds. The experimental tests were performed on a four-stroke, four-cylinder, direct injection, naturally aspirated, 60 kW diesel engine D-243. The in-cylinder pressure data was analysed to determine the ignition delay, the Heat Release Rate (HRR), maximum in-cylinder pressure and maximum pressure gradients. The influence of diesel-biodiesel blends on the Brake Specific Fuel Consumption (bsfc) and exhaust emissions was also investigated. The bench test results showed that when the engine running on blends B60 at full engine load and rated speed, the autoignition delay was 13.5% longer, in comparison with mineral diesel. Maximum cylinder pressure decreased about 1–2% when the amount of Rapeseed Methyl Ester (RME) expanded in the diesel fuel when operating at full load and 1400 min–1 speed. At rated mode, the minimum bsfc increased, when operating on biofuel blends compared to mineral diesel. The maximum brake thermal efficiency sustained at the levels from 0.3% to 6.5% lower in comparison with mineral diesel operating at full (100%) load. When the engine was running at maximum torque mode using diesel – RME fuel blends B10, B20, B40 and B60 the total emissions of nitrogen oxides decreased. At full and moderate load, the emission of carbon monoxide significantly raised as the amount of RME in fuel increased.

Download Full-text