Status indicator for amonia cartridge

Patent metadata

Field	Value
Publication number	US-9322695-B2
Application number	US-201213543160-A
Country	US
Kind code	B2
Filing date	Jul 6, 2012
Priority date	Mar 30, 2011
Publication date	Apr 26, 2016
Grant date	Apr 26, 2016

Abstract

Systems and methods for determining amount of solid ammonia stored in a canister used in providing ammonia fluid in exhaust gas after-treatment systems. A microcontroller sets an ammonia level based on the data read from an RFID tag associated with the canister. The data may provide the amount of solid ammonia stored in the canister or a tag number that the microcontroller may use to retrieve the quantity of stored solid ammonia. A measured amount of ammonia fluid used during the treatment process may be used by the microcontroller in determining the amount of solid ammonia depleted from the canister. At predetermined precisions, the amount of depleted ammonia is subtracted from the set ammonia level to determine the remaining amount of solid ammonia in the canister. This determined amount of may be used to reset the ammonia level and be written onto the RFID tag.

First claim

What is claimed is:

1. A solid ammonia canister detection system comprising:
a solid ammonium canister having stored therein a supply of solid ammonium;
a radio frequency identification device tag associated with the cannister;
an antenna configured to receive data from, and transmit data to, the radio frequency identification device tag;
a transceiver chip configured to decode data received from, and code data sent to, the radio frequency identification device tag; and
a microcontroller configured to record data received from the radio frequency identification device tag, wherein the microcontroller determines a quantity of solid ammonia that has been depleted from the canister, and wherein the microcontroller determines a quantity of solid ammonia remaining in the canister based on data from the radio frequency identification device and the quantity of solid ammonia depleted from the canister.

2. The solid ammonia canister detection system of claim 1 , further including an
additional microcontroller, the additional microcontroller configured to instruct the antenna to read data from, and write data to, the radio frequency identification device tag, the data corresponding to the quantity of solid ammonia stored in the canister.

3. The solid ammonia canister detection system of claim 2 , further including a housing having a plurality of canister positions, each canister position configured to house a canister, the system further including a dedicated antenna for each canister at each canister position, the housing further including a plurality of receptacles, at least one antenna having an outer housing configured for engagement with only one of the plurality of receptacles.

Assignees

• Nicholls David J
• Arriaga Jason B
• Kelso Jeffrey R
• Int Engine Intellectual Prop

Inventors

• Nicholls David J
• Arriaga Jason B
• Kelso Jeffrey R

Classifications

• G01F23/0061 Primary

  Physics · mapped topic

• F01N3/208 Primary

  Control of selective catalytic reduction [SCR], e.g. by adjusting the dosing of reducing agent · CPC title

• F01N2610/02

  the substance being ammonia or urea · CPC title

• B01D2251/2067

  Urea · CPC title

• Y02T10/24

  Cross-Sectional Technologies · mapped topic