Patent · US Active

Transmission control system

US10451183B2 · kind B2 · utility

0Cited by

14References

9Claims

0Family size

Assignee

ZF FRIEDRICHSHAFEN AG · DE

Inventors

Tomas Szabo · Ravensburg, DE
Knut Graichen · Ulm, DE
Sebastian Hentzelt · Braunschweig, DE

Key dates

Filing date	Nov 29, 2017
Grant date	Oct 22, 2019
Priority date	—
Expiry date	Dec 22, 2037

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02T10/40
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

A transmission which includes input and output shafts and first and second step-down devices for producing various step-down ratios. The first and second step-down devices are associated with first and second controllable clutches, respectively, in order to connect, in a torque-transmitting manner, the respective step-down device between the input shaft and the output shaft. A first gear of the transmission is obtained by actuating the first clutch and a second gear by actuating the second clutch. A method of controlling a gearshift, from the first gear to the second gear, includes the steps of determining operating condition parameters of the transmission; and determining optimized degrees of actuation of the clutches by a search process related to a transmission model that determines the degrees of actuation on the basis of operating condition parameters in relation to a predetermined optimization criterion. The transmission model is based on slip.

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