An area in the combustion chamber of some engines where the piston squishes or squeezes part of the fuel-air mixture at the end of the compression stroke . As the piston approaches top dead center , the mixture is pushed out of the squish area and this promotes turbulence, further mixing of the fuel-air mixture and more efficient combustion .
SQUISH
Meaning of SQUISH in English
English dictionary of automotive terms. Английский словарь автомобильных терминов. 2012