Hydraulic circuit for the control of a drive train
AssigneeGETRAG Getriebe- und Zahnradfabrik Hermann Hagenmeyer GmbH & Cie KG
InventorGunther Petrzik
Life of this patent
Estimating the term…
Abstract
A hydraulic circuit for the control of a double clutch transmission which has two transmission groups, each with an isolating clutch and with a plurality of shift clutches for the engagement and disengagement of gear steps, the hydraulic circuit having for each transmission group a specific hydraulic branch connected to a pump in each case via a safety valve, and each hydraulic branch having in each case a clutch control valve for controlling the assigned isolating clutch and at least one shift control valve for controlling the assigned shift clutches. Here, the safety valves are designed in each case as proportional pressure regulating valves.
Claims17
A hydraulic circuit for the control of a double clutch transmission which has two transmission groups, each with an isolating clutch and with a plurality of shift clutches for the engagement and disengagement of gear steps, the hydraulic circuit having for each transmission group a specific hydraulic branch connected to a pump in each case via a safety valve, and each hydraulic branch having in each case a clutch control valve for controlling the assigned isolating clutch, wherein the safety valves are designed in each case as proportional pressure regulating valves, wherein the gear steps of each transmission group can be shifted by means of at least two individual shift rods, and wherein the assigned hydraulic branch has for each shift rod at least one proportional directional valve as a shift control valve for controlling the assigned shift clutches.
A hydraulic circuit for the control of a double clutch transmission which has two transmission groups, each with an isolating clutch and with a plurality of shift clutches for the engagement and disengagement of gear steps, the hydraulic circuit having for each transmission group a specific hydraulic branch connected to a pump in each case via a safety valve, and each hydraulic branch having in each case a clutch control valve for controlling the assigned isolating clutch, wherein the safety valves are designed in each case as proportional pressure regulating valves, wherein the gear steps of each transmission group can be shifted by means of a shift shaft, and wherein the respective hydraulic branch has for the assigned shift shaft at least one proportional directional valve as a shift control valve for controlling the assigned shift clutches and has at least one selection actuator for selection movements of the shift shaft.
Dependencies are inferred from the claim text.