PUMP UNIT, IN PARTICULAR FOR A TRANSMISSION IN THE DRIVETRAIN OF A MOTOR VEHICLE

The invention relates to a pump unit (10) having a dual pump (16) which has a suction port (26) for drawing in from an external fluid reservoir (3) and has a high-pressure outlet (24) and a low-pressure outlet (22) which lead to a first control port (K0) and to at least one lubricant/coolant port (S...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser: HEUBNER, Wilhelm
Format: Patent
Sprache:eng ; fre ; ger
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Beschreibung
Zusammenfassung:The invention relates to a pump unit (10) having a dual pump (16) which has a suction port (26) for drawing in from an external fluid reservoir (3) and has a high-pressure outlet (24) and a low-pressure outlet (22) which lead to a first control port (K0) and to at least one lubricant/coolant port (S1, S2), respectively, of the pump unit (10), and having a high-pressure pump (38) which draws in from an internal fluid reservoir (14) and which has two high-pressure outlets (42) which lead to a second and a third control port (K1, K2) of the pump unit (10), wherein, between the high-pressure outlet (24) of the dual pump (16) and the first control port (K0), there is arranged a control valve (32) which has a return line (36) which leads into the internal fluid reservoir (14). The invention also relates to a drive assembly having a transmission (4), having a separating clutch by means of which an electric motor can be coupled to and separated from the transmission (4), and having a pump unit (10) of the above-stated type, wherein the suction port (26) of the pump unit (10) is connected to an oil collecting volume (3) of the transmission (4), and one of the lubricant/coolant ports (S0, S1) is used for the cooling of the rotor (86) and of the stator (84).