3:43
Wankel engine
Constraints fix the gear ratio at 2 : 3. The trajectories of the rotor apexes form the housing contour – even when you change the rotor shape.
Example · Automotive · ASOM
Variants of a Wankel engine
Four rotor shapes for a Wankel engine, with three to six apexes: ASOM shows the matching housing contour for each shape.
1:15
The task
Four rotors, four gear ratios
Each number of rotor apexes has its own constant ratio of gear to ring gear: 2 : 3 for the triangular, 3 : 4 for the square, 4 : 5 for the pentagonal and 5 : 6 for the hexagonal rotor. In each case, the matching housing contour should result from the motion.
What ASOM shows here
- Four rotor shapes – triangular, square, pentagonal and hexagonal – compared directly.
- The respective ratio of gear to ring gear stays constant with every change.
- The trajectory of one apex forms the housing contour; the trajectories of all apexes are identical.
Your benefits
One principle, four shapes
You compare the variants directly with one another and see how the number of apexes changes the housing contour.
Consistent with every change
Whatever constraints lock in is retained with every change; you do not have to recalculate anything. More on constraints
Contour without derivation
You do not have to calculate the housing contour yourself; the trajectory shows it directly.
Gears as a building block
In ASOM, gear pairs are among the basic building blocks, as are belt transmissions and racks. More on the building blocks
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All example videos
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