INTERNAL COMBUSTION ENGINE CASING OF VEHICLE Russian patent published in 2008 - IPC F02B77/13 

FIELD: transportation.

SUBSTANCE: casing includes bearing decorative cover of solid polymer material, on inner side of which soundproof fettling is stuck, which includes, at least, one flat-sheet soundproof panel, consisting of perforated layer of pore soundproof material, and layer of external front safety sound transparent film. At that, perforate holes are made open-ended in pore soundproof layer and in layer of external front safety sound transparent, herewith perforation coefficient is k = S_per/S_pan, = 0.02...0.06, where S_per - is summed square of perforate holes, m², S_pan - square of panel front surface, m².

EFFECT: improvement of soundproof effect.

3 dwg