Simulation researches of influence of compensation tank yolume on control parameters of cooling liquid temperature in the piston combustion engine

Mathematical model for simulation of operation of the cooling system for the combustion engine with the equalizing tank was described in this paper. Results of digital simulation of influence of the air volume changes in equalizing reservoir on the control parameters of liquid temperature in the cooling system were presented. Simulation model was worked out in AmeSim computation system. It was put that the temperature of the cooling liquid should be raised up to 125-130°C and the liquid pressure inside cooling system will be the main control parameter for pressure limited up to 0.3 MPa. Acceptable value of the pressure was provided by changing of liquid cooling intensity realized by switching two ventilators. The simulated courses of pressure, temperature, streams of heat bringing to the cooling system, efficiency of the liquid cooling pump as well frequency of turning the ventilator were presented in this paper. It was also shown, that is possible to achieve the acceptable pressure level up to 0.3 MPa with interval ± 0.005 MPa and obtain higher temperature of the liquid up to assumed value. It was shown that increasing air volume in the equalizing tank resulted decreasing frequency of fun turning. The optimum capacity of the equalizing reservoir was determined.