Unit for estimating the rotational speed of a turbocharger and system and method for controlling an internal combustion engine with a turbocharger

US9133792B2 · kind B2 · utility

Assignee

• GM GLOBAL TECHNOLOGY OPERATIONS LLC · US

Inventors

• Francesco Cianflone · Torino, IT
• Gerhard LANDSMANN · Erkrath, DE
• Andreas SIDOROW · Darmstadt, DE
• Christopher R. Eck · Palm Harbor, US
• Rolf Isermann · Seeheim-Jugenheim, DE
• Ulrich Konigorski · Clausthal-Zellerfeld, DE

Key dates

• Filing date: Aug 17, 2012
• Grant date: Sep 15, 2015
• Expiry date: Dec 19, 2033

Classification

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

Abstract

A unit for estimating a rotational speed of a turbocharger is provided. The unit includes a microprocessor comprising input ports configured for receiving measurement signals from an exhaust gas flow control system of an internal combustion engine and an output port for outputting a signal indicative of the rotational speed of the turbocharger. The input ports are adapted to receive a first set of measurement signals and a second set of measurement signals. A microprocessor is configured to calculate an estimated rotational speed of the turbocharger using a turbocharger model, based on the first set of measurement signals and the second set of measurement signals. Rhe second set of measurement signals include signals indicative of a pressure difference across a turbine of the turbocharger.