Abstract
KEYWORDS:
hydraulic regulating system, heat engine, motion equation, viscous friction, movement time.
ABSTRACT:
The paper presents the theoretical part and the numerical results obtained in the situation of the determination of the moving time of the hydraulic regulating system's piston. In the first section of the paper is presented the regulating system's skeleton diagram and the running mode depending on engine's rate.
Through the chosen solution the controlled pressure doesn't depend of the motor oil's viscosity. For the determination of the moving time of the piston at the hydraulic regulating system are used Newton's relation for viscous friction and the piston's motion equation.
Finally is obtained a quadric differential equation.
The numerical application starts from constructional data used in the construction of this regulating system. The numerical results obtained are presented as graphics in the situation of the friction and force of inertia's neglect, in the situation of the quadric differential equation solve through analytic solution and in the situation of the same differential equation solve through the biquadrate method Runge-Kutta.
Conclusions: the hydraulic command system used at adaptive heat engines has a small reaction time (t=0.022s), which means that at one engine's rotative speed of maximum 27272 rot/min, the arresting device works; practically, same serial engine's rotative speed wasn't obtained and, so, it may be said that a solution of a same command system and arresting is stabile; the obtained differential equation and the two solving methods used (which give the same value) may be used for the rating of another command system, with any constructional values.