Method and device for controlling and/or diagnosing a control system that influences a mass flow
AssigneeRobert Bosch GmbH
InventorsLutz Reuschenbach, Oliver Schlesiger, Ernst Wild
Life of this patent
Estimating the term…
Abstract
A method and a device are proposed for controlling and/or diagnosing a control system influencing a mass flow. In this context, a correction value is calculated, which corrects the controlling, or is evaluated for diagnostic purposes. The correction value, in this context, is derived from the line resistance of the mass flow line.
Claims4
A method for at least one of controlling and diagnosing a control system that influences a mass flow, comprising:
- calculating a correction value by deriving the correction value from a calculated line resistance of a mass flow line, wherein at least one of the following is true:
- the correction value corrects the controlling of the mass flow, and
- a fault detection occurs as a function of the correction value, and wherein:
- in the mass flow line, there is a control element that influences the mass flow, and
- the correction value is calculated from a pressure upstream of the control element and from an intake pressure of the mass flow line.
A method for at least one of controlling and diagnosing a control system that influences a mass flow, comprising:
- calculating a correction value by deriving the correction value from a calculated line resistance of a mass flow line, wherein at least one of the following is true:
- the correction value corrects the controlling of the mass flow, and
- a fault detection occurs as a function of the correction value, and wherein:
- in the mass flow line, there is a control element that influences the mass flow, and
- the correction value is used for correcting a drive signal of the control element by maintaining a mass rate of flow even if the calculated line resistance increases.
A method for at least one of controlling and diagnosing a control system that influences a mass flow, comprising:
- calculating a correction value by deriving the correction value from a calculated line resistance of a mass flow line, wherein at least one of the following is true:
- the correction value corrects the controlling of the mass flow, and
- a fault detection occurs as a function of the correction value, and wherein:
- the correction value is calculated from an exhaust gas back pressure and an exhaust gas pressure upstream of a control element, as well as from a mass flow across the control element.
A method for at least one of controlling and diagnosing a control system that influences a mass flow, comprising:
- calculating a correction value by deriving the correction value from a calculated line resistance of a mass flow line, wherein at least one of the following is true:
- the correction value corrects the controlling of the mass flow, and
- a fault detection occurs as a function of the correction value, and wherein:
- in the mass flow line, there is a control element that influences the mass flow, and
- a calculation of the pressure upstream of the control element is carried out in an iterative manner in accordance with a mass flow in an intake manifold and a flow condition in an exhaust gas recirculation line.
Dependencies are inferred from the claim text.