Method for checking the plausibility of the function of a pressure sensor

US11029229B2 · kind B2 · utility

Assignee

• VITESCO TECHNOLOGIES GMBH · DE

Inventors

• Christoph Klesse · Neustadt an der Donau, DE
• Tobias Ritsch · Regensburg, DE
• Claus Stephani · Pfatter, DE
• Thomas Uliana · Donaustauf, DE

Key dates

• Filing date: Jan 30, 2018
• Grant date: Jun 8, 2021
• Expiry date: Jun 16, 2039

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02D2200/0604
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A method according to the invention for checking the plausibility of the function of a pressure sensor in an injection system of an internal combustion engine includes acquiring a calibrated actuation profile, by which peak current values for opening at least one electrically actuatable injection valve are assigned to existing internal pressures. An existing internal pressure is measured in the form of an actual sensor pressure value by the pressure sensor. The method includes obtaining the electrical peak current value corresponding to the measured sensor pressure value from a calibrated actuation profile, such that the corresponding electrical peak current value acquired in this way is applied to the injection valve. Subsequently, an opening state of the injection valve is monitored in reaction to the applied electrical peak current value, and a functional state of the pressure sensor is assigned as a function of the opening state of the injection valve.