33. Piston

Figure 33.1 Piston example

RecurDyn/Piston is a special environment to analysis crank system which has only 1 piston and cylinder.

In RecurDyn/Piston, the Boundary Condition (BC) is applied to define the relationship between an engine block and a connecting rod. And the user can apply experimental data using the BC function. The position of big eye of connecting rod is defined by BC in time domain. The empirical formula was implemented for the lubrication between reciprocal components which are needed the lubrication effect such as contact, radial bearing, and sliding bearing

Step to Run Piston System

1. Define the pre-global data of an engine.

2. Define the global data of an engine.

3. Select geometries and connecting elements at the Component Builder.

4. Define values of selected geometries and connecting elements.

5. Build up an engine model by clicking OK.

6. Run the simulation.

• 33.1. System Builder
  • 33.1.1. Step to define Global Data
  • 33.1.2. System Component Builder
• 33.2. Geometric Entities
  • 33.2.1. Engine Block
    • 33.2.1.1. Modeling Options
    • 33.2.1.2. Properties
  • 33.2.2. Connecting Rod
    • 33.2.2.1. Modeling Options
    • 33.2.2.2. Properties
  • 33.2.3. Piston
    • 33.2.3.1. Modeling Options
    • 33.2.3.2. Properties
  • 33.2.4. Piston Pin
    • 33.2.4.1. Modeling Options
    • 33.2.4.2. Properties
• 33.3. Connecting Entities
  • 33.3.1. Bearing
    • 33.3.1.1. Bushing Bearing
      • 33.3.1.1.1. Modeling Options
      • 33.3.1.1.2. Properties
    • 33.3.1.2. EHD Bearing
      • 33.3.1.2.1. Modeling Options
      • 33.3.1.2.2. Properties
    • 33.3.1.3. Constraint Bearing
      • 33.3.1.3.1. Modeling Options
      • 33.3.1.3.2. Properties
  • 33.3.2. Piston Liner Connector
    • 33.3.2.1. Modeling Options
    • 33.3.2.2. Properties
      • 33.3.2.2.1. Constraint Type of Linear connector
      • 33.3.2.2.2. Cylinder Contact Type of Liner Connector
      • 33.3.2.2.3. Surface Contact Type of Liner Connector
  • 33.3.3. Piston Lubrication
  • 33.3.4. Gas Force
    • 33.3.4.1. Modeling Options
    • 33.3.4.2. Properties
• 33.4. Boundary Condition
  • 33.4.1. Modeling options
  • 33.4.2. Properties
• 33.5. Contact Entities