Patent · US Expired

Method of and device for controlling after-start enrichment of internal combustion engine

US4556036A · kind A · utility

0Cited by

3References

5Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Erwin Gloss · Ditzingen, DE
Gerhard Lotterbach · Markgröningen, DE
Egbert Perenthaler · Stuttgart, DE
Manfred Schenk · Fellbach, DE
Jan F. van Woudenberg · Schwieberdingen, DE
Udo Zucker · Brackenheim, DE

Key dates

Filing date	Jul 2, 1984
Grant date	Dec 3, 1985
Priority date	—
Expiry date	Jul 2, 2004

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF02B2075/182
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

Injection control pulses after starting the engine are multiplied by a fuel enrichment factor A.sub.1 depending on operational temperature and rotary speed of the engine. The time derivative -A/t of the enrichment factor is kept constant up to a predetermined rotary speed limit. When the speed limit is exceeded, the time derivative increases proportionally with the rotary speed increase. In this manner faster warm-up of the engine due to higher speeds influences the fuel enrichment phase.

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