Patent ID: 6817963
Filing Date: 2004-11-16
Classification: B60K,B60T,F16D

Abstract:
An automotive transmission comprising:a transmission housing supporting a sun gear (2) providing a driving input to at least one planetary gear (3) rotating about a fixed annulus gear (4, 104) and driving a planetary carrier (5, 105), and the planetary carrier (5, 105) providing a driving output to an output flange (8, 108); the planetary carrier (5, 105) is drivingly connected to the output flange (8, 108); and a liquid-cooled multi-disc brake having a plurality of inner brake discs mounted on a radial outer diameter of said planetary carrier for rotation therewith and a plurality of outer brake discs nonrotatably fixed within the transmission (1); wherein the transmission further has a coolant circulation system which delivers a coolant, to said brake discs, by an inflow formed in said planet carrier (5, 105) adjacent the inner brake discs (6) and the coolant is centrifugally accelerated outwardly through at least one of grooves, ducts and recesses in at least one of said inner brake discs (6) and said outer brake discs, towards an outflow adjacent said outer brake discs.