Oil pump for an automatic transmission of a motor vehicle

Abstract

An oil pump for a motor vehicle automatic transmission comprising a gear housing ( 2 ), a pump housing ( 1 ) and a pump rotor ( 3 ) that can be driven by a motor of the motor vehicle. In order to improve the application possibilities in a motor vehicle, in this pump the pump housing ( 1 ) can be driven such that the relative rotational speed between the pump rotor ( 3 ) and the pump housing ( 1 ) can be modified.

1 - 14 . (canceled)  
   
   
       15 . A oil pump for a motor vehicle automatic transmission, comprising a gear housing ( 2 ), a pump housing ( 1 ), and a pump rotor ( 3 ), that can be driven by a motor of the motor vehicle, the pump housing ( 1 ) can be driven such that a relative rotational speed between the pump rotor ( 3 ) and the pump housing ( 1 ) can be modified:  
   
   
       16 . The oil pump according to  claim 15 , wherein one or more of the pump rotor ( 3 ), and the pump housing ( 1 ) can be driven by means of an electric motor, a rotor ( 6 ) of the electric motor is integrated in one or more of the pump rotor ( 3 ), and the pump housing ( 1 ).  
   
   
       17 . The oil pump according to  claim 15 , wherein bores ( 7 ,  11 ) are provided in the pump housing ( 1 ) for guiding an oil flow.  
   
   
       18 . The oil pump according to  claim 17 , wherein the bores ( 7 ,  11 ) join into ring grooves ( 9 ,  12 ) that are incorporated on one or more of the pump housing  1  and the gear housing ( 2 ).  
   
   
       19 . The oil pump according to  claim 18 , wherein the ring grooves ( 9 , 12 ) in a pump are arranged one of axially or radially opposite from each other in the pump housing ( 1 ).  
   
   
       20 . The oil pump according to  claim 15 , wherein the pump housing ( 1 ) can be blocked from torsion at least in one sense of rotation when a drive is shut off.  
   
   
       21 . The oil pump according to  claim 20 , wherein blockage consists of a freewheel ( 17 ) that blocks against a sense of rotation of the pump rotor ( 3 ).  
   
   
       22 . The oil pump according to  claim 20 , wherein blockage consists of a brake ( 16 ).  
   
   
       23 . The oil pump according to  claim 20 , wherein blockage occurs by an electro-motor force exercised by the electric motor on the pump housing ( 1 ).  
   
   
       24 . The oil pump according to  claim 15 , wherein a housing drive (C) can be implemented by means of one of a tooth system on the pump housing ( 1 ) or by directly flange-mounting a separate electric motor.  
   
   
       25 . The oil pump according to  claim 15 , wherein a reducing gear is provided between the pump housing ( 1 ) and a drive.  
   
   
       26 . The oil pump according to  claim 15 , wherein the pump housing ( 1 ) can be driven in a sense of rotation of the pump rotor ( 3 ) when a flow rate is greater than a designed flow rate of the pump rotor ( 3 ).  
   
   
       27 . The oil pump according to  claim 15 , wherein the pump housing ( 1 ) can be driven against a sense of rotation of the pump rotor ( 3 ) when a flow rate is smaller than a designed flow rate of the pump rotor ( 3 ).  
   
   
       28 . The oil pump according to  claim 15 , wherein a pressure channel ( 13 ) and an intake channel ( 14 ) are arranged in an axial direction opposite from each other in one of the pump or the gear housing ( 2 ).