# US 9,752,482 B2 · Device for storing and delivering an aqueous additive

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- Number: US 9,752,482 B2
- Document ID: US9752482B2
- Status: Granted
- Kind: B2
- Application number: 14/435,354
- Filed: 2013-03-14
- Published: 2015-08-20
- Granted: 2017-09-05
- Earliest claimed: 2012-10-12
- Assignees: Kautex Textron GmbH & Co. KG
- Applicants: Kautex Textron GmbH & Co. KG
- Inventors: Volker Treudt; Thomas Wagner
- Web page: https://patentgrep.com/patent/US9752482B2

## CPC

- F01N 3/2006: {Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating (by electrically controlling the supply of combustible mixture or its constituents only F02D41/0235)}
- B60K 15/073: Tank construction specially adapted to the vehicle (B60K15/077 takes precedence)
- F01N 3/2066: {Selective catalytic reduction [SCR]}
- F01P 7/16: by thermostatic control
- F01N 2610/02: the substance being ammonia or urea
- F01N 2610/10: the substance being heated, e.g. by heating tank or supply line of the added substance
- F01N 2610/105: Control thereof
- F01N 2610/1406: Storage means for substances, e.g. tanks or reservoirs
- F01N 2610/1433: Pumps
- F01N 2610/1486: Means to prevent the substance from freezing
- Y02A 50/20: Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
- Y02T 10/12: Improving ICE efficiencies
- F01N: GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES (arrangements in connection with gas exhaust of propulsion units in vehicles B60K13/00; combustion-air intake silencers specially adapted for, or arranged on, internal-combustion engines F02M35/00; protecting against, or damping, noise in general G10K11/16)
- B60K: ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- F01P: COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES (arrangements in connection with cooling of propulsion units in vehicles B60K11/00; heat-transfer, heat-exchange or heat-storage materials C09K5/00; {cooling of gas-turbine engines F02C7/12}; heat exchange in general, radiators F28)
- Y02A: TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

The invention relates to a device for storing and delivering an aqueous additive for catalytic exhaust-gas denitrogenization in a motor vehicle. The device comprises a storage vessel (1) enclosing a storage volume (2), comprises at least one delivery pump (8) for the additive, and comprises means for heating at least parts of the storage volume (2), wherein the device is characterized in that the storage vessel (1) is at least partially of double-walled form.

## Claims

### Claim 1

A device for storing and delivering an aqueous additive, in particular for catalytic exhaust-gas denitrogenization in a motor vehicle, comprising:
a storage vessel which encloses a storage volume and an optional additional melt volume,
at least one delivery pump for the additive,
a heating device configured to heat at least parts of the storage volume and the optional additional melt volume, and
a heating volume which is transversable by a flow of a heat carrier medium comprising a plurality of ducts which are selectively transversable individually or jointly by the flow of the heat carrier medium and which, in a bottom and/or in a wall of the storage vessel, define different heating zones;
wherein the storage vessel is at least partially of double-walled form.

### Claim 2 (depends on 1)

The device as claimed in claim 1, wherein the ducts at least partially surround a centrally arranged delivery sump in the bottom of the storage vessel.

### Claim 3 (depends on 1)

The device as claimed in claim 1, wherein the ducts are arranged in concentric or spiral form around the delivery sump.

### Claim 4 (depends on 1)

The device as claimed in claim 1, wherein the plurality of ducts include a first, inner duct that communicates with the feed port and in that there is at least one second, outer duct that is connected to a return path of the first duct.

### Claim 5 (depends on 4)

The device as claimed in claim 4, wherein the second duct is connected to the first duct via a thermostat valve.