Process for fuel metering

US4893602A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Helmut Gross · Hofheim, DE
• Wolfgang Hoptner · Uhingen, DE
• Gunther Kaiser · Stuttgart, DE

Key dates

• Filing date: Mar 2, 1988
• Grant date: Jan 16, 1990
• Expiry date: Mar 2, 2008

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02D41/105
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

The invention relates to a process for fuel metering during acceleration operations at a plurality of cylinders of an internal-combustion engine, with sequential injection, in which the fuel quantity to be injected is determined corresponding to the operating state and the acceleration state is determined, additional fuel injections being performed after determination of the acceleration state. Such a process is to be further developed to the extent that a faster metering of the increased fuel quantity into the internal-combustion engine can be performed during the acceleration operation. To achieve this object, it is proposed that the determined fuel quantity is injected into at least one, preferably into all those cylinders whose injected fuel quantity has not yet been taken in and whose inlet valve has not yet been closed or whose intake stroke has not yet been concluded. This takes place in particular at the time of the generation of a trigger signal (TS) corresponding to the quantity which corresponds to the set fuel increase of the acceleration.