WOLFRAM SYSTEM MODELER
Engine1bModel of one cylinder engine with gas force and preparation for assembly joint JointRRP |
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Diagram
Wolfram Language
In[1]:=
SystemModel["Modelica.Mechanics.MultiBody.Examples.Loops.Engine1b"]
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Information
This information is part of the Modelica Standard Library maintained by the Modelica Association.
This is a model of the mechanical part of one cylinder of an engine. It is similar to Loops.Engine1a. The difference is that a simple model for the gas force in the cylinder is added and that the model is restructured in such a way, that the central part of the planar kinematic loop can be easily replaced by the assembly joint "Modelica.Mechanics.MultiBody.Joints.Assemblies.JointRRP". This exchange of the kinematic loop is shown in Loops.Engine1b_analytic. The advantage of using JointRRP is, that the non-linear algebraic equation of this loop is solved analytically, and not numerically as in this model (Engine1b).
An animation of this example is shown in the figure below.
Components (17)
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world |
Type: World Description: World coordinate system + gravity field + default animation definition |
|---|---|---|
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piston |
Type: BodyCylinder Description: Rigid body with cylinder shape. Mass and animation properties are computed from cylinder data and density (12 potential states) |
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connectingRod |
Type: BodyBox Description: Rigid body with box shape. Mass and animation properties are computed from box data and density (12 potential states) |
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bearing |
Type: Revolute Description: Revolute joint (1 rotational degree-of-freedom, 2 potential states, optional axis flange) |
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inertia |
Type: Inertia Description: 1D-rotational component with inertia |
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crank1 |
Type: BodyCylinder Description: Rigid body with cylinder shape. Mass and animation properties are computed from cylinder data and density (12 potential states) |
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crank2 |
Type: BodyBox Description: Rigid body with box shape. Mass and animation properties are computed from box data and density (12 potential states) |
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crank3 |
Type: BodyCylinder Description: Rigid body with cylinder shape. Mass and animation properties are computed from cylinder data and density (12 potential states) |
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crank4 |
Type: BodyBox Description: Rigid body with box shape. Mass and animation properties are computed from box data and density (12 potential states) |
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mid |
Type: FixedTranslation Description: Fixed translation of frame_b with respect to frame_a |
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cylPosition |
Type: FixedTranslation Description: Fixed translation of frame_b with respect to frame_a |
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gasForce |
Type: GasForce2 Description: Rough approximation of gas force in a combustion engine's cylinder |
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b1 |
Type: Revolute Description: Revolute joint (1 rotational degree-of-freedom, 2 potential states, optional axis flange) |
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b2 |
Type: RevolutePlanarLoopConstraint Description: Revolute joint that is described by 2 positional constraints for usage in a planar loop (the ambiguous cut-force perpendicular to the loop and the ambiguous cut-torques are set arbitrarily to zero) |
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cylinder |
Type: Prismatic Description: Prismatic joint (1 translational degree-of-freedom, 2 potential states, optional axis flange) |
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rod1 |
Type: FixedTranslation Description: Fixed translation of frame_b with respect to frame_a |
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rod3 |
Type: FixedTranslation Description: Fixed translation of frame_b with respect to frame_a |