Motor vehicle thermostat safety device - makes connection between low temp. water inlet and outflow, when outlet temp. rises above maximum

摘要

The thermostat arrangement for motor vehicles comprises two inlet connections (1, 2) through which water flows at differing temps, an outflow connection (3), and a valve unit (19) which throttles the connecting apertures (7, 11) between the inflow connections (1, 2) and the outflow (3). A control element (20) reacts to the temps. and controls the movement of the valve unit (19). A safety unit (40) can produce a connection between one inlet connection (1) for water of low temp. and the outflow connection (3), when the temp. in the outflow connection (3), rises above a predetermined max.