Method for operation of an internal combustion engine

US10415494B2 · kind B2 · utility

Assignee

• CONTINENTAL AUTOMOTIVE GMBH · DE

Inventors

• Tobias Braun · Undorf, DE
• Josef Kainz · Salching, DE

Key dates

• Filing date: Sep 28, 2016
• Grant date: Sep 17, 2019
• Expiry date: Sep 28, 2036

Classification

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

Abstract

Various embodiments may adjust fuel injections to account for phase differences of the piston stroke and the valve strokes of a reciprocating-piston engine. For example: measuring dynamic pressure oscillations assigned of the air in the intake tract or the gas in the outlet tract; determining a crankshaft phase angle signal; determining the phase positions of selected signal frequencies of the oscillations in relation to the signal; determining lines of equal phase positions based on the phase positions of the selected frequencies; determining a common intersection point of the lines by projection into a common plane spanned by inlet valve stroke phase difference and outlet valve stroke phase difference and signal-frequency-dependent phase shifting; determining the inlet and outlet phase difference from the common intersection point; determining the piston stroke phase difference from the phase shift; and adjusting an amount of a fuel injection based on the determined differences.