Method and apparatus for injecting fuel into the cylinders of an engine having an injection input valve for each cylinder

US5209205A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Gerd Auracher · Beilstein, DE
• Joerg Lange · Eberdingen, DE
• Winfried Moser · Ludwigsburg, DE

Key dates

• Filing date: Jun 3, 1992
• Grant date: May 11, 1993
• Expiry date: Jun 3, 2012

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T10/12
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A method and apparatus for injecting fuel into the cylinders of an engine which has an injection valve for each cylinder that is positioned so that it can injection fuel into an open inlet port. The method and apparatus provide for fuel to be partially injected into a suction pipe leading to the cylinder before the corresponding intake-valve arrangement opens, so that it is stored in advance. Fuel is also partially injected into the open inlet port. A value which is a measure of the temperature in the suction pipe also is acquired. On the basis of this acquired value, the total required fuel quantity to be stored in advance is determined and to what extent this fuel quantity will be injected after the injection-valve arrangement opens. The method and apparatus avoid the formation of wall film in the suction pipe as a result of storing too much injected fuel in advance.