Question

I'm running a single cylinder engine simulation using ADAMS/View to determine the torque output based off of the combustion force which needs to be given as a function of time. I'm having trouble with the setup for the combustion force function setup. Can someone explain how to set up such a function?

Answer 1

For simulation of a single cylinder engine for Torque which is a function of time, some common data are needed depending on requirements or availability. These are:

*Total Volume displacement

*Cylinder inner diameter

*Crank Shaft radius

*Clearance Volume per cylinder

* Compression ratio

* Piston mass

Simulation will be done, for example at a engine speed of 2000 rpm and simulation on fixed step size.

Now for torque simulation:

You will need summation of net torque which is amount of total fuel injection as the function of time.

Net Torque = Total torque used for combustion - Torque used to overcome load- T mass inertia of rotating parts- Torque in overcoming frictions.

Net Torque = J* alpha

Where J is polar moment of Inertai multiplied by angular accleration.

Pleasw have a look here:

The setup for a four stroke single cylinder engine implementing the crankshaft angles and degrees of rotation.

Have a look at this PV diagram for torque production of again a single cylinder 4 stroke real time engine.

Setup parameters for torque simulation are given above. Depending on radius of crankshaft, engine capacity, all parameters simulation will be done