2-Valve Head Layout
These programs analyse the geometrical layout of a 2-valve cylinder head.
They permit the basic design of 2-valve cylinder heads in that the physical
sizes of the valves are determined with respect to their clearances from
each other, the dynamic motion of the piston, or the cylinder walls within
a cylinder bore of a given size. Cylinder cutouts are also calculated.
In the 2-valve Hemi Head layout valve edge contact is a possibility. The program calculates minimum inter-valve clearance.
This information can then be used in the EXHAUST and INTAKE VALVE DESIGN Programs.
Another cylinder head design program has been added for the case of the two-valve engine where the valves are vertical (parallel to the cylinder axis) and the chamber can be designed as a ‘pancake’ type or a ‘compact’ type. This layout of head is particularly important for industrial engines which design is becoming increasingly prevalent as a replacement for the carburetted 2-stroke engine in order to meet increasingly stringent exhaust emissions laws.
Classic,
Neo-Classic and Modified Wedge Head:
Snapshots
of 2-valve classic and neo-classic wedge head output animation
2-valve
classic wedge head output information screens
2-valve classic wedge
head input information screen
Finite
element method used to calculate classic and neo-classic wedge head volume
and surface area
Main
input and output data page for the classic wedge head
Main
input and output data page for the modified wedge head
Hemi
Head:
2-valve
hemi head output information screens
2-valve hemi head input
information screen
Finite
element method used to calculate hemi head volume and surface area
Vertical
Valves Head:
Vertical-valve
Compact Head input data information and output graphics
Vertical-valve
Pancake Head input data information and output graphics
Downloading
the AVI files below may take several minutes due to their size
Play
an AVI animation of a 2-valve classic wedge head (1491kb)
Play
an AVI animation of a 2-valve hemi head (1278kb)
Play
an AVI animation of a 2-valve modified wedge head (8105kb)
©Prof Blair & Associates