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1. EP2352913 - A THERMOSTAT VALVE ARRANGEMENT AND A COOLING SYSTEM FOR COMBUSTION ENGINE DRIVEN VEHICLES

注意: このテキストは、OCR 処理によってテキスト化されたものです。法的な用途には PDF 版をご利用ください。
Claims

1. A thermostatic valve aggregate for a motor vehicle cooling system, comprising a valve housing containing a valve seat, further a thermally expansible drive element (28) which is configured in the valve housing and is coupled to a valve element, and a spring biasing the valve element against the valve seat, one coolant hookup (18, 20) on each side of the valve seat, a bypass valve element (34) prestressed by a bypass valve spring (42) in the direction of a bypass valve seat (38) in order to selectively link one bypass hookup (21) to the valve housing to one of the other hookups (18, 20),

characterized

in that an electromagnet (52) is mounted on the valve housing and comprises a core (56, 58) extending as far as the bypass valve seat (38), in that the bypass valve element (34) is fitted with a magnetically effective armature element resting against or nearly reaching said core when the bypass valve element (34) rests against the bypass valve seat (38), and in that the bypass valve element (34) is guided axially along the thermostatic valve element (24) and is prestressed -- by the said bypass valve spring resting against the thermostatic valve element (24) -- in a direction from said element (24) toward the bypass valve seat (38).
  2. Thermostatic valve aggregate as claimed in claim 1, characterized in that a coil (52) is mounted on the valve housing outer side and in that core portions (58) are inserted in sealing manner through valve housing apertures (60) into this housing.
  3. Thermostatic valve aggregate as claimed in either of claims 1 and 2, characterized in that the core is U-shaped and its legs (58) extend approximately as far as near the bypass valve seat (38).
  4. Thermostatic valve aggregate as claimed in one of claims 1 through 3, characterized in that the bypass valve element (34) is made of plastic and incorporates at least one sheet-metal-like armature element (62).
  5. Thermostatic valve aggregate as claimed in claim 4, characterized in that the armature portion (62) is imbedded into the material of the bypass valve element (34).
  6. Thermostatic valve aggregate as claimed in one of claims 1 through 5, characterized in that a bypass valve spring (42) rests at one end against the thermostatic valve (24) and by its other end against a support washer guided within a cylindrically circular gap (40) of the bypass valve element (34) and in that a second bypass valve spring (46) acts on the support washer (44) from the opposite side, the spring constant of the first bypass valve spring (42) being larger than that of the second bypass valve spring (46).