US 7,127,347 B2 · Method and device for operating a combustion engine

Abstract

A method and a device for operating a combustion engine allow a plausibility check of two pressure sensors in a mass-flow line of the combustion engine in any operating range of the combustion engine. At least one component effecting a pressure drop is provided in the mass-flow line, and a first pressure is measured upstream from the at least one component with the aid of a first pressure sensor, and a second pressure is measured downstream from the at least one component with the aid of a second pressure sensor. The first pressure sensor and the second pressure sensor are checked for plausibility as a function of at least one modeled variable characterizing at least one pressure drop in the mass-flow line between the first pressure sensor and the second pressure sensor.

Claims16

Dependent claims

A system for operating a combustion engine having a mass-flow line and at least one component effecting a pressure drop in the mass-flow line, comprising:

a first pressure sensor provided upstream from the at least one component, wherein the first pressure sensor measures a first pressure upstream from the at least one component;
a second pressure sensor provided downstream from the at least one component, wherein the second pressure sensor measures a second pressure downstream from the at least one component;
a plausibility unit for checking plausibility of measurements made by the first pressure sensor and the second pressure sensor, as a function of at least one modeled variable characterizing at least one pressure drop in the mass-flow line between the first pressure sensor and the second pressure sensor.

A method for operating a combustion engine having a mass-flow line and at least one component effecting a pressure drop in the mass-flow line, comprising:

measuring a first pressure upstream from the at least one component by a first pressure sensor;
measuring a second pressure downstream from the at least one component by a second pressure sensor;
and
checking for plausibility of measurements made by the first pressure sensor and the second pressure sensor, as a function of at least one modeled variable characterizing at least one pressure drop in the mass-flow line between the first pressure sensor and the second pressure sensor.

1 more element

Dependencies are inferred from the claim text.

Method and device for operating a combustion engine

Life of this patent

Method and device for operating a combustion engine

Life of this patent

Abstract

Claims16