Patent · US Expired

Four-wheel locking system for a motor vehicle

US4986800A · kind A · utility

3Cited by

3References

5Claims

0Family size

Assignee

Dr. Ing. h.c. F. Porsche AG · DE

Inventors

Peter Meffert · Tiefenbronn, DE
Heinrich Schwarz · Tiefenbronn, DE
Juergen Patzer · Neckartailfingen, DE

Key dates

Filing date	Jun 8, 1989
Grant date	Jan 22, 1991
Priority date	—
Expiry date	Jun 8, 2009

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF16H55/0806
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

In the drive line of a motor vehicle, a planetary transmission is arranged as four-wheel locking system, a braking device acting upon the planet carrier of this planetary transmission. The planetary transmission includes an input sun gear, an output sun gear disposed coaxially next to it, and planet wheels mating simultaneously with both sun gears. In order to keep friction losses low and avoid a self-locking in the planetary transmission, the real pitch module of all gear wheels is as small as possible and proportional to the driving torque to be transmitted, and the operational pressure angle is as large as possible.

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