Coolant circuit for motor vehicles with a liquid-cooled internal combustion engine

摘要

The invention relates to a coolant circuit for motor vehicles with a liquid-cooled internal combustion engine, the coolant circuit comprising at least one radiator circuit with a coolant pump for the delivery of the coolant, a coolant jacket of the internal combustion engine and a coolant radiator controlled by a thermostat, together with at least one heating circuit of a vehicle heating system, connected parallel to the radiator circuit, with a heat exchanger and a coolant regulator, to which the heating circuit can be connected. In order to design a coolant circuit of the generic type for motor vehicles so that circulation of the coolant is possible in any operating condition of the vehicle heating in the case of interrupted coolant flow through the coolant radiator, it is proposed according to the invention that, if the coolant flow through the coolant radiator and the heat exchanger is interrupted, a bypass circuit which comprises at least the coolant jacket of the internal combustion engine be simultaneously connectable to the coolant regulator in the heating circuit.