Exhaust treatment methods and systems

摘要

A control method for an exhaust treatment system is provided. The method includes: selectively determining a fluid state from a plurality of fluid states based on a temperature of a fluid supply source; estimating an average consumption rate based on the fluid state; and evaluating a fluid supply within the fluid supply source based on the average consumption rate.

主权项

1. A control method for an exhaust treatment system included in a vehicle, comprising:
measuring a distance driven by the vehicle using a first electronic sensor and measuring a fluid dosing quantity of fluid injected by the exhaust treatment system using a second electronic sensor; generating a history of fluid consumption rate that stores a plurality of fluid consumption rates by computing each of the fluid consumption rates based on the distance driven for the vehicle and the fluid dosing quantity; selectively determining whether the fluid exists in a first fluid state or a second fluid state from a plurality of fluid states based on a temperature of the fluid supply source; in response to determining that the fluid state is a first state, modifying, by a control module comprising an electronic computer processor coupled to electronic memory, the history of fluid consumption rate by setting one or more of the plurality of fluid consumption rates already stored in the history of fluid consumption rate to one or more predetermined values; after modifying the history of fluid consumption rate, estimating an average fluid consumption rate based on the history of fluid consumption rate; in response to determining that the fluid state is the second state, estimating an average fluid consumption rate based on a non-modified history of fluid consumption rate; evaluating the fluid within the fluid supply source based on the average fluid consumption rate estimated after the history of fluid consumption rate is modified; and selectively initiating a vehicle speed inducement strategy based on a distance remaining for the vehicle.