Air-compressing fuel-injection internal-combustion engine with an exhaust treatment device for reduction of nitrogen oxides

US5479775A · kind A · utility

Assignee

• Mercedes-Benz Group AG · DE

Inventors

• Michael Kraemer · Nidderau, DE
• Friedrich Wirbeleit · Eßlingen, DE
• Christian Enderle · Plochingen, DE
• Walter Friess · Stuttgart, DE
• Bernd Krutzsch · Köngen, DE
• Gert Withalm · Großenhain, DE
• Christof Schoen · Winnenden, DE
• Leopold Mikulic · Graz, AT
• Gernot Hertweck · Fellbach, DE
• Frank Thoma · Stuttgart, DE

Key dates

• Filing date: Apr 25, 1994
• Grant date: Jan 2, 1996
• Expiry date: Apr 25, 2014

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T10/40
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

The invention relates to a diesel internal combustion engine with an exhaust treatment device for the reduction of nitrogen oxides and with a fuel injection system comprising a high-pressure pump and at least one solenoid valve-controlled injection nozzle. The injection nozzle is actuated by an electronic control unit and is intended both for the primary injection, provided for the combustion, and for the additional injection, influencing the effectiveness of the exhaust treatment device. The fuel injection nozzle provided for the primary injection also provides for the secondary injection. The secondary injection takes place as a supplementary injection at the earliest in the region of the end phase of the combustion after the ignition top dead center.