Liquid-cooling circulation system for power and working machines, especially internal combustion engines

A liquid-cooling circulation system for power-and working-machines, especially internal combustion engines, comprising radiator inflow means, a fill inlet means and a fill cover means in the fill-in opening thereof at a high point in the radiator inflow means, an expansion tank means with a fill cover means and with expansion and reservoir volumes, excess pressure and vacuum valve means in one of the fill cover means, a line connection from the high point of the fill inlet means to the bottom area of the expansion tank means, an air-separating tank means arranged at the fill inlet means of the radiator inflow means, said air-separating tank means being located in a vent by-pass line means from a high point of the radiator inflow means to a radiator return flow means and having a cross-sectional throttling means between radiator inflow means and air-separating tank means, and the high point of the air-separating tank means being operatively connected with the line connection from the fill inlet means to the bottom area of the expansion tank means.

A liqiud cooling circulation system for power and working-machines, especially internal combustion engines, comprising radiator inflow and return flow means, an air-separating tank means operatively connected in a by-pass vent line means from a high point in the radiator inflow means to the radiator return flow means, said air-separating tank means including at its high point a fill inlet means having a fill-in opening and a closure cover means, the high point of the air-separating tank means being operatively connected by way of an excess pressure valve means and vacuum valve means in the closure cover means with the bottom area of an atmospheric expansion tank means, the vent line means including throttling means ahead of the discharge in the air-separating tank means, a temperature-controlled vent valve means being arranged in the line connection from the high point of the air-separating tank means to the expansion tank means, said vent valve means having a closing shifting temperature which lies below the thermostatically regulated normal operating temperature of the cooling medium and commencing with which the thermal expansion-, elasticity and pump operationally-conditioned cooling medium-pressure curve at the suction side of a cooling pump means assures the cavitation-free operation thereof.

A liquid cooling circulation system for power- and working-machines, especially internal combustion engines, comprising an atmospheric expansion tank means, excess pressure-, vacuum- and vent-valve means, said expansion tank means being connected downstream of said valve means in the direction toward the atmosphere, the temperature-controlled vent valve means being constructed at the same time as vacum valve means in the closure cover means whose valve body forms a theremo-snap-spring, cooperates with a sealing ring as valve seat and valve opening and being acted upon by one of a spring and a float in the direction toward the sealing ring, the spring or float, the valve body and the sealing ring being arranged in this sequence coaxially vertically one above the other in the valve body of the excess pressure valve means with a valve opening arranged in parallel to the valve opening thereof.