Hydraulic System of a Transmission Device with a Lubrication Circuit

摘要

A hydraulic system (1) of a transmission device (2) with a lubrication circuit (4), which is able to be supplied with hydraulic fluid downstream of a cooling device (18) for cooling and lubrication, is described. One part of the volume flow of hydraulic fluid led through the cooling device (18) is able to be discharged downstream of the cooling device (18) and upstream of the lubrication circuit (4) in the direction of a hydraulic fluid reservoir (13). A valve device (26) arranged downstream of the cooling device (18) and upstream of the lubrication circuit (4) is provided, which valve device is transferable into a first operating state and into a second operating state depending on the operating condition, whereas, in the first operating state of the valve device (26), a volume flow of hydraulic fluid supplied to the valve device (26) is able to be discharged at least partially in the direction of the hydraulic fluid reservoir (13), while, in the second operating state of the valve device (26), a volume flow of hydraulic fluid supplied to the valve device (26) is able to be supplied at least partially to a shifting element (28) of the transmission device (2).

主权项

1. Hydraulic system (1) of a transmission device (2) with a lubrication circuit (4), which is able to be supplied with hydraulic fluid downstream of a cooling device (18) for the cooling and lubrication of the transmission device, whereas at least one part of the volume flow of hydraulic fluid led through the cooling device (18) is able to be discharged downstream of the cooling device (18) and upstream of the lubrication circuit (4) in the direction of a hydraulic fluid reservoir (13), characterized in that a valve device (26) arranged downstream of the cooling device (18) and upstream of the lubrication circuit (4) is provided, which is transferable into a first operating state and into a second operating state, whereas, in the first operating state of the valve device (26), a volume flow of hydraulic fluid supplied to the valve device (26) is able to be discharged at least partially in the direction of the hydraulic fluid reservoir (13), while, in the second operating state of the valve device (26), a volume flow of hydraulic fluid supplied to the valve device (26) is able to be supplied at least partially to a shifting element (28) of the transmission device (2).