Patent · US Expired

Process for the automatic regeneration of a soot filter in a passenger vehicle having a diesel engine

US4747264A · kind A · utility

20Cited by

7References

10Claims

0Family size

Assignee

Zeuna-Srarker GmbH & Co. KG · DE

Inventors

Enrique Santiago · Augsburg, DE
Peter Kugland · Friedberg, DE
Alois Ullmer · Augsburg, DE

Key dates

Filing date	Oct 8, 1986
Grant date	May 31, 1988
Priority date	—
Expiry date	Oct 8, 2006

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02T10/40
WIPO fieldEnvironmental technology
WIPO sectorChemistry

Abstract

In a process for the automatic regeneration of a soot filter in an exhaust line (11) of a diesel engine in a passenger vehicle, a throttle valve in the intake line is controlled by the following system logic. The speed (n) of the diesel engine (1), the back pressure (PVF), measured upstream of the soot filter (12), and the exhaust temperature are each compared with preset lower limit values (ng, PGU, TGU). The back pressure (PVF) is additionally compared with a preset upper limit value (PGO). When all measured variables lie above the limit values mentioned, the control device generates a signal "close throttle valve". The two limit values for the pressure, (PGU and PGO), are displaced with the speed (n) in accordance with their respective alteration.

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