In the paper, the Author presents the method of realisation of various scenarios of "test ride" on engine test bench. Research possibilities offered by semi-virtual system consisting of a real engine and a vehicle simulator are described. The previous article by the Author, "The Principles of Engine Operation Simulation in Test-bench Examination in the Conditions Equivalent to Traffic Exploitation of the Vehicle" [7] was devoted to the description of test requirements. Test accuracy, structure and equipment of the test stand were described there, as well as the characteristics of the software that controls the test and monitors its correctness.

In this paper, the Author presents a method of simulating various "test ride" scenarios for an automobile tested on engine test bench. The research possibilities offered by the semi-virtual system consisting of a real engine and vehicle motion simulator are underlined. The Author also describes the method of performing tasks in basic phases of vehicle testing. The following article by the Author, "The method of executing simulation procedures on engine test bench in traffic tests of combustion engines", will present requirements concerning test accuracy, structure and equipment of the test stand, and the characteristics of software that controls the tests and supervises its outcome.

The work presents cycle models of cylinder pressure and models of forces in crank-piston system based on a sample of experimental results. The models make it possible to determine the cycles in an arbitrary state of engine operation. Model limitations and the conditions for model applicability are also discussed. An example simulation of the processes is presented for well identified and verified models pertaining to the engine of Polonez 1,5 GU automobile. The method can also be applied to other types of engines after identification of the model parameters based on a sample of at least six indicator courses measured in different states of engine operation.