METHOD AND HYDRAULIC CIRCUIT FOR THE HYDRAULIC CONTROL OF A MOTOR VEHICLE TRANSMISSION, PARTICULARLY AN AUTOMATIC OR AUTOMATIZED MOTOR VEHICLE TRANSMISSION

摘要

The invention relates to a method for the hydraulic control of a motor vehicle transmission, particularly an automatic or automatized motor vehicle transmission, more particularly a double-clutch transmission, comprising an hydraulic circuit (1). According to the invention, a control system (9) is supplied with a fluid from a supply system (5) and comprises at least one actuator (12, 13, 14, 15, 16, 17) for the control of the motor vehicle transmission. The supply system (5, 6, 7, 8) comprises a reservoir (19), a fluid pump (20), at least one first filtering device (21) and at least one first return line (24, 27, 28, 29) arranged downstream of the fluid pump (20), wherein the fluid is pumped by the fluid pump (20) from the reservoir (19) and is filtered during the pumping process by at least one first filtering device (21). A first return line (24) comprises a pressure limiting valve (DBV), wherein said pressure limiting valve (DBV) is opened when an opening pressure of the pressure limiting valve (DBV) is reached. In order to reduce the pollution of the fluid in a simple and cost-effective manner, the fluid pump (20) is continuously supplying fluid for filtering even after the opening pressure of the pressure limiting valve (DBV) has been reached, thereby increasing the service life of the fluid pump (20) in an artificial manner.