Squish (piston engine)

Squish band

Squish is an effect in internal combustion engines which creates sudden turbulence of the fuel/air mixture as the piston approaches top dead centre (TDC).^[1]^[2]

In an engine designed to use the squish effect, at top dead centre (TDC) the piston crown comes very close, (typically less than 1mm^[2]), to the cylinder head. The gases are suddenly "squished" out within the combustion chamber, creating turbulence which promotes thorough fuel/air mixing, a factor beneficial to efficient combustion. Squish effect may be found in ohv and ohc engines, including engines with a Heron cylinder head.

References

↑ "How to Measure Your Cylinder Head Squish Clearance..." Retrieved 16 June 2013.
1 2 "The Combustion Chamber" Retrieved 16 June 2013.

Bibliography

Progress Report for Combustion and Emission Control for Advanced CIDI Engines. United States Office of Transportation Technologies, United States Department of Energy

Heat engines

Carnot engine Fluidyne Gas turbine Hot air Jet Photo-Carnot engine Piston Pistonless (Rotary) Rijke tube Rocket Split-single Steam (reciprocating) Steam turbine Stirling Thermoacoustic

Beale number West number

Timeline of heat engine technology

Thermodynamic cycle

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