Internal-combustion engines – Cooling – With vent
Patent
1989-01-18
1990-04-03
Kamen, Noah P.
Internal-combustion engines
Cooling
With vent
123 411, 236 34, 236 92R, F01P 322
Patent
active
049131079
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND AND SUMMARY OF THE INVENTION
The invention relates to a liquid-cooling circulation system for power and working-machines (especially internal combustion engines) with an air-separating tank which lies in a by-pass vent line that extends from a high point in the radiator inflow fill line.
The air separating tank is provided at its high point with a fill inlet having a fill-in opening, a closure cover, and a line connected with a bottom area of an atmospheric expansion tank through excess pressure and vacuum relief valves each located in the closure cover. The excess pressure valve limits the pressure in the air-separating tank through a control line in the radiator inflow. The air-separating tank is arranged at the high point of the radiator inflow. The fill inlet includes connecting openings to the high points both of the radiator inflow and the air separating tank. The closure cover, in addition to closing the fill opening of the fill inlet, also closes the connecting openings with respect to one another. A throttle line connection is extended, as part of the by-pass vent line, from the high point of the radiator inflow to the bottom-near area of the air-separating tank.
The closure cover includes a direct control line between the connection opening of fill inlet and radiator inflow on one hand and the excess pressure valve limiting the pressure in the radiator inflow on the other. The excess pressure relief valve has an adjusting motor control diaphragm at the radiator inflow. A temperature-controlled venting valve is arranged in the line connection from the high point of the air-separating tank to the expansion tank and has a closing-shifting-temperature which lies below the thermostatically controlled normal operating temperature of the cooling medium. This ensures a conditioned cooling medium-pressure curve and cavitation free operation at the suction side of the cooling medium pump.
Furthermore, the invention relates to a liquid-cooling circulation system for power and working machines (especially internal combustion engines) with a fill inlet and a fill cover at a high point in the radiator inflow. An expansion tank is provided with a fill cover and an expansion and reservoir volume areas. Excess pressure and vacuum valves are provided in one of the two fill covers and there is a line extending from the high point of the fill inlet to the bottom area of the expansion tank. An air-separating tank is arranged at the fill inlet of the radiator inflow, which is located in a vent by-pass line that extends from a high point of the radiator inflow to the radiator return flow, and has a cross section throttle place between the radiator inflow and the air-separating tank. A high point of the vent line is connected to the line-connection from the fill inlet to the bottom area of the expansion tank.
Still further the invention contemplates having an air-separating tank which lies in a by-pass vent line extending from a high point in the radiator inflow to the radiator return flow. The high point includes a fill inlet with a fill-in opening and closure cover and is connected by an excess pressure and a vacuum valve (located in the closure cover) with the bottom area of an atmospheric expansion tank.
The vent line includes a throttling place ahead of the discharge into the air-separating tank. A temperature-controlled vent valve is arranged in the line connection from the high point of the air-separating tank to the expansion tank. Its actuating temperature lies below the thermostatically regulated normal-operating-temperature of the cooling medium for ensuring a pressure curve at the suction side of the cooling medium pump that provides cavitation-free operation thereof.
The invention also contemplates an atmospheric expansion tank which is series-connected to atmosphere, and wherein downstream of the excess pressure, vacuum and vent-valves the temperature-controlled vent valve is constructed at the same time as vacuum valve in the closure cover. This temperature-controlled vent valve has a valve bo
REFERENCES:
patent: 4002442 (1977-01-01), Merz
patent: 4358051 (1982-11-01), Hunt
patent: 4473037 (1984-09-01), Michassouridis et al.
patent: 4510893 (1985-04-01), Schweiger et al.
BMW
Kamen Noah P.
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