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.
Claims20
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, wherein the safety valves are designed in each case as proportional pressure regulating valves.
A hydraulic circuit for the control of a double clutch transmission of a vehicle, the double clutch transmission having 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,
- wherein the two hydraulic branches are decoupled from one another in such a way that, in the event of a failure of any element of one transmission group or of one hydraulic branch of the hydraulic circuit, the vehicle remains drive-ready to a qualified extent by means of the other transmission group and the other hydraulic branch, respectively.
A hydraulic circuit for the control of a drive train of a motor vehicle, with a proportional pressure regulating valve which can be connected on the inlet side to a pump, and with a digitally regulated proportional directional valve which is connected on the inlet side to the proportional pressure regulating valve and which can be connected on the outlet side to an actuator arrangement for the actuation of a safety-relevant device of the drive train.
Dependencies are inferred from the claim text.