Process and system for controlling a motor vehicle diesel engine

US5819705A · kind A · utility

Assignee

• Mercedes-Benz Group AG · DE

Inventors

• Fritz Scherer · Unterensingen, DE
• Wolfram Schmid · Eislingen/Fils, DE

Key dates

• Filing date: Oct 23, 1996
• Grant date: Oct 13, 1998
• Expiry date: Oct 23, 2016

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16H63/40
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

Process and arrangement for controlling a motor vehicle diesel engine in which the fuel injection is limited as a function of a characteristic power limitation diagram and of a characteristic smoke diagram. As a function of the engaged transmission shifting position and/or of the vehicle speed, either a characteristic normal-operation smoke diagram or a correspondingly different characteristic starting-operation smoke diagram which, at a given rotational engine speed, permits larger injection quantity, are used as the injection-quantity-limiting characteristic smoke diagram. As a result, a favorable acceleration performance is achieved, particularly during the start of engines with a relatively small displacement.