Avl List Gmbh

Iveco S.p.a.

Fpt Industrial S.p.a.

Helmut Altendorfer

Christof Knollmayr

Robert Pöschl

Klemens Neunteufl

Robert Roithinger

Josef Speiser

Fabio Cococcetta

Thomas Eckhardt

Gerald Gradwohl

Andreas Schrattbauer

Günther Nagenkögl

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

A crankcase breathing system () for an internal combustion engine includes at least one oil separating apparatus with a preliminary separator () and a main separator () arranged downstream of the same, with the preliminary separator () including a diffuser () between an inlet () and an outlet () which expands in the direction of flow. In order to achieve high separation rates in the simplest possible way it is provided that the preliminary separator () is arranged integrally with the main separator (), with preferably the preliminary separator () and the main separator () forming a separator unit ().

Crankcase breathing system

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Peilstein/Mühl, Austria

Helmut Altendorfer