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Method and apparatus for operation of a heat engine

一种热力发动机、工作方法的技术，应用在发动机元件、发动机控制、燃烧发动机等方向，能够解决不能考虑颗粒过滤器实际载荷等问题

Inactive Publication Date: 2010-08-11
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For other operating points at higher rotational speeds there are rough estimation methods for monitoring the pressure sensor, but they do not especially take into account the actual load of the particle filter in the exhaust tract

Method used

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  • Method and apparatus for operation of a heat engine
  • Method and apparatus for operation of a heat engine
  • Method and apparatus for operation of a heat engine

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Embodiment Construction

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Abstract

A method and a device for operating a combustion engine(1) allow a plausibility check of two pressure sensors (30,35)in a mass-flow line of the combustion engine(1) in any operating range of the combustion engine. At least one component(10,15) effecting a pressure drop is provided in the mass-flow line(5), and a first pressure is measured upstream from the at least one component with the aid of afirst pressure sensor(30), and a second pressure is measured downstream from the at least one component with the aid of a second pressure sensor(35). The first pressure sensor(30) 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 secondpressure sensor(35).

Description

technical field The invention relates to a method and a device for the operation of a heat engine. Background technique Methods and devices are known for operating a heat engine comprising a mass flow line in the form of an exhaust gas duct and in which at least one component influencing the pressure drop, for example a turbine of an exhaust gas turbocharger, is arranged in the exhaust duct and / or a catalytic converter. It is also known to measure a first pressure in the exhaust gas line downstream of the turbine by a first pressure sensor and to measure a second pressure in the exhaust gas line downstream of the turbine or catalytic converter by a second pressure sensor. Currently only limited measures are known for monitoring two pressure sensors in the exhaust tract. At very low engine speeds or when the engine is switched off, the sensor values ​​of the two pressure sensors can be easily compared with one another, since the pressure difference between the first pressu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02B37/12F01N11/00
CPCF02B77/086F02B39/16F02D41/187F01N3/035F02D2200/0406F02D41/222F01N13/02G01L27/00F02D2200/0812F02B37/00F02D41/1448F02B39/00F01N9/002Y02T10/40G01L27/007F02B77/083F01N13/009
Inventor E·莫泽尔W·埃德尔曼P·萨卡
Owner ROBERT BOSCH GMBH
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