Patent · US Active

Method and device for controlling the oil supply of an automatic gearbox and a starting element

US7951043B2 · kind B2 · utility

27Cited by

8References

12Claims

0Family size

Assignee

ZF FRIEDRICHSHAFEN AG · DE

Inventors

Matthias Reisch · Ravensburg, DE
Ralf Dreibholz · Meckenbeuren, DE
Gerhard Gumpoltsberger · Friedrichshafen, DE

Key dates

Filing date	Mar 8, 2006
Grant date	May 31, 2011
Priority date	—
Expiry date	Jul 9, 2028

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF16H2312/14
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

A method and a device for controlling the oil supply of an automatic transmission (gearbox) and to a starting element. The method can guarantee a sufficient supply of oil to a hydraulic control unit of the automatic transmission and/or the starting element, in particular an oil-cooled friction clutch, both during the operation of the internal combustion engine (4) and when the latter is at a standstill with the aid of an oil pump (2) that can be mechanically driven by the internal combustion engine (4) and a second oil pump (3) that can be electrically driven. In addition, the cooling oil supply of the starting element is guaranteed by the provision of a low-pressure oil by way of the electrically driven oil pump (3), at least during the starting operation, the stream cooling the starting element (11).

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