Patent · US Active

Drive control device of an automatic gearbox for a motor vehicle and method therefor

US7972241B2 · kind B2 · utility

3Cited by

3References

11Claims

0Family size

Assignee

ZF FRIEDRICHSHAFEN AG · DE

Inventors

Peter Schiele · Kreßbronn, DE
Thilo Schmidt · Meckenbeuren, DE
Klaus Steinhauser · Kreßbronn, DE

Key dates

Filing date	Jun 14, 2006
Grant date	Jul 5, 2011
Priority date	—
Expiry date	Sep 14, 2028

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF16H61/0031
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

A drive control device of an automatic transmission of a vehicle. The transmission having a main oil pump driven by an internal combustion engine, an electrically driven auxiliary oil pump and a hydraulic control device; a device for determining the required volumetric flow rate needed to determine the oil/hydraulic target volumetric flow rate during current operating conditions, based on the transmission oil temperature; a device for determining the volumetric flow rate to determine the actual volumetric flow rate that can be delivered during the current operating conditions by the main and/or auxiliary oil pump, and a device for controlling the target volumetric flow rate to reduce the target volumetric flow rate to at least the currently deliverable actual volumetric flow rate, if the currently deliverable actual volumetric flow rate is below the current target volumetric flow rate.

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