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Automatic transmission, in particular for motor vehicles

  • US 5,878,632 A
  • Filed: 04/11/1997
  • Issued: 03/09/1999
  • Est. Priority Date: 10/13/1994
  • Status: Expired due to Fees
First Claim
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1. An automatic transmission for motor vehicles, with a positive displacement pump for supplying a hydrodynamic converter,wherein for feeding the positive displacement pump, an excess flow of a pressure medium under pressure from a main pressure valve of the automatic transmission is fed through a feed channel with a feed nozzle, andwherein the feed channel has a cross section which becomes steadily smaller in the direction toward the positive displacement pump and has the feed nozzle on its end facing the positive displacement pump,the improvement comprisingthe feed nozzle terminates in the vicinity of a suction zone of the positive displacement pump in a suction channel connected with a reservoir, so that a combination of a propelling flow flowing through the feed nozzle with a suction flow flowing through the suction channel takes place directly at a suction nodule disposed in the suction zone, andthe feed nozzle is integrated in a pump housing.

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