초록 ▼

A cooling circuit includes a valve device (1, 1', 1") for a separate heat exchanger (42), especially of an internal combustion engine (48). To achieve a combined pressure limitation and pipe or hose break valve, a valve body (6, 35, 50), upon reaching a coolant throughput for maximum heat transfer i

A cooling circuit includes a valve device (1, 1', 1") for a separate heat exchanger (42), especially of an internal combustion engine (48). To achieve a combined pressure limitation and pipe or hose break valve, a valve body (6, 35, 50), upon reaching a coolant throughput for maximum heat transfer in heat exchangers (42) located downstream, is actuated as a function of delivery pressure into an engaged position with a valve seat (5, 51). A throttle passage (7, 36, 52) maintains a coolant throughput that corresponds to maximum heat transfer. In the event of a pipe or hose break, the valve body (6, 35, 50) serving as part of a pipe or hose break is locked in a closed position.

대표청구항 ▼

[ What is claimed is:] [1.] Valve device for a heat exchanger located in a bypass cooling circuit of an internal combustion engine, comprising:a housing communicated with the bypass cooling circuit;a valve seat located in said housing, said valve seat defining a line cross section;a valve body dispo

[ What is claimed is:] [1.] Valve device for a heat exchanger located in a bypass cooling circuit of an internal combustion engine, comprising:a housing communicated with the bypass cooling circuit;a valve seat located in said housing, said valve seat defining a line cross section;a valve body disposed in said housing to be movable between a closed position engaged with said valve seat and an open position spaced from said valve seat, said valve body defining a throttle passage;a return spring arranged to bias said valve body toward said open position;said valve body being moved into said closed position by a delivery pressure of a coolant flow for a maximum heat transfer in the heat exchanger,said throttle passage having a cross-section adapted to said maximum heat transfer,wherein said valve body, in the event of a break in the bypass cooling circuit, serves as part of a break valve that is held in a closed position independently of the delivery pressure via a locking device or a closing spring, with a sealing element that suppresses the coolant flow.