System for storing an auxiliary liquid and supplying same to an internal combustion engine

Patent metadata

Field	Value
Publication number	US-2019107080-A1
Application number	US-201616076872-A
Country	US
Kind code	A1
Filing date	Aug 2, 2016
Priority date	Feb 9, 2016
Publication date	Apr 11, 2019
Grant date	—

Abstract

The invention relates to a system for storing and feeding an auxiliary liquid to an internal combustion engine of a motor vehicle or to parts of the internal combustion engine of the motor vehicle, having a storage vessel for the fluid, having at least one delivery pump for the fluid, and having at least one line system comprising an inflow to a consumer and a return flow into the storage vessel, the system comprising a connector module which is inserted into an opening of the storage vessel, the connector module having fluid ducts which communicate with the storage vessel and are connected to an inflow line and to a return flow line of the line system, and the connector module comprising a module block which is configured as a thermally conductive and/or heatable body.

First claim

1 - 13 . (canceled)

14 . A system for storing and feeding an auxiliary liquid to an internal combustion engine of a motor vehicle or to parts of the internal combustion engine of the motor vehicle, having a storage vessel for the auxiliary liquid, having at least one delivery pump for the auxiliary liquid, and having at least one line system comprising an inflow to a consumer and a return flow into the storage vessel, the system comprising a connector module which is inserted into an opening of the storage vessel, the connector module having fluid ducts which communicate with the storage vessel and are connected to an inflow line and to a return flow line of the line system, and the connector module comprising a module block which is configured as a thermally conductive and/or heatable body, and the connector module being configured as a switchable multiway valve which, in the case of corresponding actuation, makes ventilation and/or emptying of the line system possible,
wherein the module block comprises thermally conducting elements which extend into the volume of the storage vessel, the thermally conducting elements being spaced apart from the line system.

15 . The system as claimed in claim 14 , wherein the connector module is configured to expand the return flow of the auxiliary liquid within the storage vessel.

16 . The system as claimed in claim 14 , wherein the connector module comprises a ventilation connector which can be activated operably and upstream of which a filter is connected.

17 . The system as claimed in claim 14 , wherein the connector module comprises an electric defrosting heater, and in that the thermally conducting body is configured as a heating body of the electric defrosting heater.

18 . The system as claimed in claim 14 , wherein the system is configured to ventilate and/or empty the line system after shutdown of the internal combustion engine.

19 . The system as claimed in claim 18 , wherein the system is configured to control the ventilation and/or emptying of the line system in a manner which is dependent on the operating state of the internal combustion engine.

20 . The system as claimed in claim 18 , wherein an extraction point of the inflow line, said extraction point is provided in the storage vessel, is arranged upstream of a siphon or a riser pipe in the inflow line.

21 . The system as claimed in claim 18 , wherein a check valve is provided in the return flow line in the storage vessel or upstream of or at the opening thereof into the storage vessel, the check valve prevents auxiliary liquid being sucked back out of the storage vessel into the line system upon the ventilation and/or emptying of the system.

22 . A method for operating a system for storing and feeding an auxiliary liquid to an internal combustion engine of a motor vehicle or to parts of the internal combustion engine of the motor vehicle as claimed in claim 14 , wherein ventilation and/or emptying of the line system are/is provided in each case after shutdown of the internal combustion engine and in a manner which is dependent on the ambient temperature.

23 . A heatable connector module for a water injection tank as a storage vessel for a system for storing and feeding auxiliary liquid to an internal combustion engine of a motor vehicle as claimed in claim 14 .

Assignees

• Kautex Textron Gmbh & Co Kg

Inventors

• Heidemeyer Timm
• Wolf Hartmut

Classifications

• F01N3/2066

  Selective catalytic reduction [SCR] · CPC title

• F01N2610/1486

  Means to prevent the substance from freezing · CPC title

• F01N2610/10

  the substance being heated, e.g. by heating tank or supply line of the added substance · CPC title

• F01N2610/1493

  Purging the reducing agent out of the conduits or nozzle · CPC title

• F02M25/028

  into the charge intakes · CPC title