investigation of free mass forces and moments of a reciprocating engine

Description:

• Every reciprocating engine generates mass forces.
• The mass forces of the oscillating masses cannot be compensated completely, while the mass forces of the rotating masses are fully compensated.
• By using several cylinders, it is possible that the forces compensate each other. However, disturbing moments may still occur.
• The experimental unit TM 180enables investigation of the free masses and moments of a reciprocating engine with a single cylinder, with two cylinders or with four cylinders.
• The engine model comprises pistons with plastic slide bushes.
• The slide bushes do not require lubrication.
• For each cylinder, the angle between cranks can be adjusted continuously.
• As an aid, marks are provided at 0°, 90°, 180° and 270°.
• The oscillating masses can be varied by using additional weights at the pistons.
• The four-throw crankshaft is driven by a DC motor and a synchronous belt.
• The speed is electronically controlled and digitally displayed.
• The free forces and moments are recorded by force sensors placed at the support of the model.
• All electronic functions are integrated in the display and control unit.
• The display and control unit also contains the USBinterface for data acquisition.
• The GUNTsoftware enables the detailed evaluation of the signals of forces and moments.

Technical Details:

Specification:

• experimental unit to investigate oscillating and rotating mass forces and moments of a reciprocating engine with up to 4 cylinders
• simulation of single, 2- or 4-cylinder engines
• electronically commutated and speed-controlled drive motor with digital speed display
• continuous adjustment of the angle between cranks
• force sensors to measure forces and moments
• vibration isolation using rubber elements and suitable tuning
• GUNT software for data acquisition via USB under Windows 8.1, 10

Technical Data:

• Engine:
  • number of cylinders: 4
  • piston mass: 40g
  • additional mass: 41g
• Crank drive:
  • mass of connecting rod: 18g
  • centre distance of cylinders: 35mm
  • crank radius: 15mm
  • length of connecting rod: 70mm
• Measuring ranges
• speed: 100…3000min^-1
• force: 0…500N
• 230V, 50Hz, 1 phase
• 230V, 60Hz, 1 phase; 120V, 60Hz, 1 phase
• UL/CSA optional

Dimensions & Weight:

• L x W x H: 420x370x350mm
• Weight: approx. 40kg
• L x W x H: 230x230x80mm (display and control unit)
• Weight: approx. 1kg

Required for Operation:

• PC with Windows

Learning Objectives/Experiments:

• effect of mass forces:
  • mass forces in dependence on the speed
  • mass forces in dependence on the piston mass
  • first and second order mass forces
  • comparison of different crank drives:
  • 4-cylinder, symmetrical, 180° angle between cranks
  • 4-cylinder, non-symmetrical, 90° angle between cranks
  • 2-cylinder, 180° angle between cranks
  • single cylinder

Scope of Delivery:

• 1 engine model
• 1 display and control unit
• 1 set of accessories (tools, additional masses)
• 1 GUNTsoftware + USB cable
• 1 set of instructional material

Features:

• investigation of free mass forces and moments of a reciprocating engine
• continuous adjustment of the angle between cranks
• simulation of single, two- or four-cylinder engines

Accessories:

• Optional:
• WP 300.09 Laboratory trolley

Due to the continuous development of our products, the goods supplied may vary in detail to that illustrated on this Website.