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Example · Automotive · ASOM

Simulation of a Wankel engine

A Wankel engine with a triangular rotor: ASOM simulates the motion and shows the matching housing contour.

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ASOM with the Wankel engine: triangular rotor in the housing contour described by its apexes, the gear and ring gear in the center, handles marked in red on the left, constraints at the bottom3:43
The task

One rotor, three apexes, one contour

The gear on the housing and the ring gear of the triangular rotor must maintain a constant ratio of 2 : 3. Even so, the eccentricity, rotor size and curvature of the flanks should remain freely adjustable. The matching housing contour should result from the motion – exact or with an offset for an apex seal.

What ASOM shows here
  • The ratio of gear to ring gear stays constant at 2 : 3 with every change.
  • The trajectories of the rotor apexes form the housing contour – exact or with an offset for an apex seal.
  • Handles marked in red change the eccentricity, rotor size and curvature of the flanks – with the mouse or by entering a value.
Your benefits

Change the rotor shape, and the kinematics stay consistent

You change the eccentricity and rotor shape directly on the model and immediately see the matching housing contour.

Nothing to adjust by hand

The system stays consistent with every change. More on constraints

Compare shapes quickly

A different rotor shape is set up quickly, and you see the matching contour immediately.

Switch the motion

You set up other motion sequences in the drive control by switching connections. More on motion sequences

More examples

Similar tasks

All example videos
1:15
Automotive · ASOM

Wankel engine variants

Rotors with three to six apexes compared, each with the matching gear ratio. ASOM shows the matching housing contour for each shape.

1:32
Automotive · ASOM

Piston of a two-stroke engine

At 6,000 rpm, inertia matters. ASOM calculates the joint and bearing forces, including the inertia of the connecting rod, counterweight and piston.

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Example video