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
Piston of a two-stroke engine
The slider-crank of a two-stroke engine at 6,000 rpm: ASOM calculates the joint and bearing forces, taking the inertia of the moving parts into account.
1:32
The task
When inertia matters
Crank, connecting rod and piston form a slider-crank, with a counterweight on the crank. The forces in the joints and bearings are to be determined. At high speeds and accelerations, inertia is often no longer negligible.
What ASOM shows here
- The masses and moments of inertia of the connecting rod, counterweight and piston are taken into account in the force calculation.
- Forces and force components in the joints, plus the gas force on the piston – simplified here.
- The influence of inertia on the joint forces becomes directly visible.
Your benefits
Inertia effects under control from the start
You see early on how strongly inertia changes the forces in joints and bearings, and you factor it into your concept right away.
Size bearings correctly
With inertia taken into account, you design bearings and pins for the forces that occur in operation. More on force calculation
Find critical positions
The diagrams show at which crank position the forces peak. More on diagrams
Fast sequences in slow motion
The animation runs in slow motion, while the calculation uses the full speed. This lets you follow even fast motion sequences at your own pace.
More examples
All example videos
Similar tasks
3:43
1:15
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.
3:05
Pick-and-place mechanism
A parallel mechanism with two degrees of freedom: you specify the trajectory, and ASOM provides the angle, speed and torque of the drives, including inertia effects.
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