Patent · US Active

Hydraulic circuit arrangement for operating a hydrodynamic torque converter

US8172053B2 · kind B2 · utility

1Cited by

23References

13Claims

0Family size

Assignee

ZF FRIEDRICHSHAFEN AG · DE

Inventors

Horst Leichsenring · Friedrichshafen, DE
Berron Hairston · Friedrichshafen, DE
Jochen Birkle · Tettnang, DE
Thomas Aisenpreis · Friedrichshafen, DE

Key dates

Filing date	May 18, 2009
Grant date	May 8, 2012
Priority date	—
Expiry date	Mar 31, 2030

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF16H61/143
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

A hydraulic circuit arrangement for operating a hydrodynamic torque converter (1, 10) with a converter bridging clutch (11). The circuit arrangement comprises a hydraulic switching unit (3, 14) having at least one valve for controlling an inflow flow and a return flow of oil to the converter (1, 10) and the converter bridging clutch (11), an oil cooler (4, 15), a first line (5, 12) for acting upon the converter bridging clutch (11) with an engagement pressure (PWKzu) and a second line (6, 13) for acting upon the converter bridging clutch (11) with a disengagement pressure (PWKauf). The circuit arrangement comprises a bypass line (8, 17) which is connected directly with the oil cooler (4, 15) so as to bypass the hydraulic switching unit (3, 14).

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.