Method, computer program, and device for measuring the amount injected by an injection system

US6915683B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Eberhard Schoeffel · Bamberg, DE
• Hans-Peter Braun · Sulz am Neckar, DE
• Josef Seidel

Key dates

• Filing date: Mar 5, 2002
• Grant date: Jul 12, 2005
• Expiry date: Mar 5, 2022

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02M65/001
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

For measuring the injection quantity (Vm) of injection systems (18), in particular in internal combustion engines, test fluid (22) is injected by the injection system (18) into a measurement chamber (12). To increase the precision and stability of the measurement, the volume of the measurement chamber (12) is kept constant during the injection. Moreover, a gas volume (Vg) is present in the measurement chamber (12). The injected volume (Vm) of test fluid (22) is ascertained from the pressure change (dP) in the measurement chamber (12) that occurs upon an injection of test fluid (22). The ascertainment of the injected volume (Vm) is done by means of the state equation for ideal gases.