# US 10,480,374 B2 · Dosing module

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- Number: US 10,480,374 B2
- Document ID: US10480374B2
- Status: Granted
- Kind: B2
- Application number: 15/387,051
- Filed: 2016-12-21
- Published: 2017-06-22
- Granted: 2019-11-19
- Earliest claimed: 2015-12-21
- Assignees: J.C. Bamford Excavators Limited
- Applicants: J.C. Bamford Excavators Limited
- Inventors: Nathan James Peace
- Web page: https://patentgrep.com/patent/US10480374B2

## CPC

- F01N 3/208: {Control of selective catalytic reduction [SCR], e.g. by adjusting the dosing of reducing agent}
- E02F 9/0866: {Engine compartment, e.g. heat exchangers, exhaust filters, cooling devices, silencers, mufflers, position of hydraulic pumps in the engine compartment}
- F01N 3/2066: {Selective catalytic reduction [SCR]}
- F01N 11/00: Monitoring or diagnostic devices for exhaust-gas treatment apparatus
- F01N 2610/02: the substance being ammonia or urea
- F01N 2610/1453: Sprayers or atomisers; Arrangement thereof in the exhaust apparatus
- F01N 2610/146: Control thereof, e.g. control of injectors or injection valves
- F01N 2610/1486: Means to prevent the substance from freezing
- F01N 2900/0416: using the state of a sensor, e.g. of an exhaust gas sensor
- F01N 2900/1808: Pressure
- F01N 2900/1811: Temperature
- F01N 2900/1812: Flow rate
- F01N 2900/1821: Injector parameters
- 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
- Y02T 10/40: Engine management systems
- 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)
- E02F: DREDGING; SOIL-SHIFTING (winning peat E21C49/00)
- Y02A: TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

A dosing module for an emissions abatement system, the dosing module including an armature, means for moving the armature and a valve body having an outlet; the dosing module having an unblocked condition, in which the armature is moveable between a first position, in which the outlet is closed by the armature, and a second position, in which the armature is spaced apart from the outlet, and wherein, in use, application of electricity to the means for moving the armature at a first level of energy causes the armature to move from the first position to the second position; the dosing module further having a blocked condition, in which flow of a liquid through the outlet is prevented, wherein, in use, application of electricity to the means for moving the armature at a second level of energy causes the dosing module to change to the unblocked condition.

## Claims

### Claim 1

A method of operating a dosing module for an emissions abatement system, the dosing module including an armature, a coil for moving the armature and a valve body having an outlet, wherein in normal operation the armature is moveable between a first position, in which the outlet is closed by the armature, and a second position, in which the armature is spaced apart from the outlet, and wherein, in use, application of electricity to the coil at a first level of energy causes the armature to move from the first position to the second position, the method comprising:
(a) determining that the dosing module is in a blocked condition;
(b) increasing the temperature of the dosing module by applying electricity at a second level of energy that is greater than the first level of energy to the coil; and
(c) heating the dosing module until the dosing module is in an unblocked condition, in which liquid can flow through the dosing module, the method further comprising at least one or more of:
(d) operating the dosing module to pass liquid through the dosing module, and/or wherein the step of determining that the dosing module is in a blocked condition includes determining that flow of a liquid through the dosing module is prevented and/or wherein the step of determining that the dosing module is in a blocked condition includes:
(i) determining a first pressure of a liquid to be supplied by the dosing module prior to actuation of the dosing module;
(ii) determining a second pressure of a liquid to be supplied by the dosing module during actuation of the dosing module; and
(iii) comparing the first pressure and the second pressure, for example wherein, in step (iii) the second pressure is greater than the first pressure.

### Claim 2 (depends on 1)

A method of operating a dosing module according to claim 1, wherein the step of increasing the temperature of the dosing module by applying electricity to the dosing module includes increasing the temperature to at least 100° C., and further comprises at least one of: increasing the temperature of the dosing module by applying electricity to the dosing module and holding the increased temperature for less than 400 seconds by applying electricity to the dosing module by applying an electrical current to the dosing module of at least 400 milliamps.

### Claim 3 (depends on 1)

A method of operating a dosing module according to claim 1, wherein the liquid includes a reductant including at least one of: wherein the liquid includes urea, wherein the liquid includes Diesel Exhaust Fluid, or wherein the liquid includes AdBlue.

### Claim 4 (depends on 1)

A method of operating a dosing module according to claim 1, wherein, when the dosing module is in the blocked condition, flow of a liquid through the outlet is prevented by crystals of the liquid.

### Claim 5 (depends on 2)

A method of operating a dosing module according to claim 2, wherein increasing the temperature of the dosing module by applying electricity to the dosing module includes holding the increased temperature for less than 200 seconds.

### Claim 6 (depends on 2)

A method of operating a dosing module according to claim 2, wherein increasing the temperature of the dosing module by applying electricity to the dosing module includes applying an electrical current to the dosing module of at least 500 milliamps.