Device and method for accurately supplying components of an automatic gearbox for motor vehicles

Abstract

The device for accurately supplying components of an automatic gearbox for motor vehicles is characterized in that the supply line which supplies the gearbox with hydraulic oil is divided into two lines ( 1, 2 ), the first line ( 1 ) having an aperture ( 4 ) and a differential pressure valve ( 5 ) and the second line ( 2 ) having a pressure limiting valve ( 6 ).

1 . Device for the precisely targeted supply to components in an automatic vehicle transmission, characterized in that feed line ( 3 ) that supplies the transmission with hydraulic fluid is divided into two lines ( 1 ,  2 ), wherein a restrictor ( 4 ) and a differential pressure valve,( 5 ) are installed in the first line ( 1 ), and a pressure relief valve ( 6 ) is installed in the second line ( 2 ).  
     
     
         2 . Device according to  claim 1 , characterized in that the differential pressure valve is connected to an electric pressure controller ( 7 ), which is connected to the electronic transmission control system ( 8 ).  
     
     
         3 . Device according to claims  1  and  2 , characterized in that the pressure relief valve is connected to the electric pressure controller ( 7 ).  
     
     
         4 . Method for the precisely targeted supply to components in an automatic vehicle transmission, characterized in that the hydraulic fluid that is supplied to the transmission via a feed line for the purpose of lubricating and cooling is divided into two sub-quantities, which flow through two separate lines, wherein in the first line the flow rate of the hydraulic fluid is controlled via a restrictor and a differential pressure valve, which is controlled by an electric pressure controller, which itself is controlled by the electronic transmission control system, while the pressure prior to the restrictor in the first line is controlled via a pressure relief valve installed in the second line, which also is controlled by the electric pressure controller and thus by the electronic transmission control system.