Fpt Motorenforschung Ag

Avl List Gmbh

Iveco S.p.a.

Fpt Industrial S.p.a.

Thomas Eckhardt

Klemens Neunteufl

Fabio Cococcetta

Helmut Altendorfer

Gerald Gradwohl

Pascal Wilhelm

The invention relates to a method for detecting an unsealed location in a heat recovery system () of an internal combustion engine () of a motor vehicle. The heat recovery system () has at least one combustible working medium, a working medium circuit () with at least one EGR evaporator (), a pump (), and at least one expansion machine (). The aim of the invention is to allow an early and reliable detection of leakages in the EGR evaporator () of a heat recovery system () in the simplest manner possible. This is achieved in that the internal combustion engine () is operated in the overrun mode, the oxygen concentration in the exhaust gas is ascertained and compared with a defined lower threshold, and if the lower threshold is undershot, a leakage in the EGR evaporator () is detected.

Method for detecting an unsealed location in a heat recovery system of an internal combustion engine

Method for detecting an air filter condition, in particular for combustion engines, comprising the following steps: calculation of a linear regression over data-couples values, each comprising pressure drop value at the air filter and square of air flow value crossing the air filter, corresponding to said pressure drop value, in order to obtain an angular coefficient of the linear regression, comparison of the angular coefficient or of the function construed on the angular coefficient with at least one threshold in order to detect an operative condition of the air filter (FIG.).

System for detecting an air filter condition, in particular for combustion engine

System for controlling an after-treatment system (ATS) temperature of a combustion engine, comprising means for carrying out an after-treatment warm up procedure, the system providing the interruption/inhibition of such warm-up means after a time period from the warm up procedure starting.

System for controlling an after-treatment system (ATS) temperature of a combustion engine

Growing community of inventors

Romanshorn, Switzerland

Thomas Eckhardt