Internal combustion engine and method for determining leaks at fluid-conducting components thereof

Abstract

The invention relates to an internal combustion engine, comprising a fuel tank (36), a tank ventilation line (38) and a Venturi nozzle (30) arranged in a fluid-conducting component (16), the fluid-conducting component (16) and / or the Venturi nozzle (30) have / has an inflow channel (28), an access point (40) connected downstream of the inflow channel (28) and fluidically connected to the tank ventilation line (38), and an outflow channel (32) connected downstream of the access point (40). In this case, an outflow section (48) of the Venturi nozzle (30) downstream of the inlet point (40) is surrounded by a component (16) in such a way that a detection chamber (46) is formed around the outflow section (48), the detection chamber (46) having at least one inflow opening (50) via which the detection chamber (46) can be pressurized, the at least one pressure sensor (76, 84) is arranged and designed to detect a pressure that varies in the tank ventilation line (38) as a result of a leak in the detection chamber (46). The invention further relates to a method according to claim 9 for determining leaks on a fluid-conducting component (16) of such an internal combustion engine (10).

Description

technical field [0001] The invention relates to an internal combustion engine with at least one Venturi nozzle arranged in a fluid-conducting component and to a method for determining leakage at a fluid-conducting component of such an internal combustion engine. Background technique [0002] From DE 10 2014 012 427 A1 a vapor return line system of a fuel vapor collection container is known which has a vapor outlet line with a first shut-off valve which is arranged at the vapor in the export line. A first vapor return line branch is arranged between the vapor outlet line of the fuel vapor collection container and the charge air line. A second vapor return line branch is arranged between the vapor outlet line of the fuel vapor collection container and the fresh air intake line of the compressor of the turbocharger. A first vapor return line branch is coupled via a first check valve to the charge air line and a second vapor return line branch is coupled via a second check val...

AI Technical Summary

Problems solved by technology

[0005] With some of the aforementioned systems it is not possible or only to a limited extent to identify certain malfunctions, especially minor leaks caused by cracked plastic parts with Venturi nozzles or incorrect insertion of the Venturi element in the internal combustion engine

These systems are also in part very expensive and thus costly to implement in practice

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