Considerations about the Thermal Requirements of the Cylinder Heads of Air-Cooled Compression Ignition Engines Used in the Construction Industry

Călin Itu, Bogdan Novac and Vladimir Gheorghe Mărdărescu

Abstract – When designing a cylinder head for two families of stationary, air
cooled, direct-injection diesel engines to drive electric current generators or water
pumps in the construction industry, we must take into account the following aspects:
BMEP, which is limited in these engines at values of 3.8-5.2 bar. The paper presents
the optimal solution found in the functional analysis performed for a FLUENT
program with a single-cylinder engine and a family of two-cylinder engines,
considering each cooling air flow case. Another aspect to consider when designing
cylinder heads is to determine the thermal regimes of the cylinder head, piston,
cylinder, valves and nozzle, to define the development of heat per engine work cycle.
The objectives of this paper are to define optimal construction solutions for a cylinder
head for a direct injection air-cooled Diesel engine having a stroke of 65 mm and a
bore of 82 mm.

Keywords – analysis, construction industry, cylinder head, direct injection, heat
release

Pages: 70-79

DOI: 10.2478/ouacsce-2022-0007