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Method of operating a vehicle under frozen diesel exhaust fluid conditions

A technology for discharging fluid and diesel oil, which is applied to exhaust devices, exhaust treatment, engine components, etc., and can solve problems such as vehicle restrictions

Active Publication Date: 2016-08-17
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the diesel emission fluid freezes before the refill of the tank is detected, the vehicle will continue to be subject to the low diesel emission fluid induction protocol

Method used

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  • Method of operating a vehicle under frozen diesel exhaust fluid conditions

Examples

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Embodiment Construction

[0033] refer to figure 1 , a method of controlling a vehicle is shown generally at 20 . The vehicle uses diesel exhaust fluid (DEF) stored in a tank provided on the vehicle. DEF is used in conjunction with a selective catalytic reduction catalyst to reduce nitrogen oxides in vehicle exhaust. The tank may include three separate level sensors for determining the level of DEF in the tank, ie the mass of DEF remaining in the tank. Additionally, the separate level sensor can be used for refill detection when new DEF is added to the tank.

[0034] The mass of DEF is used to calculate the distance the vehicle can travel before running out of DEF. This calculation is based on a rolling average of the DEF consumption rate and the mass of DEF remaining in the tank.

[0035]When DEF is unfrozen, i.e. in a liquid state, the vehicle operates in the non-frozen DEF protocol. When under the non-frozen DEF protocol, the mass of DEF is calculated by an algorithm that evaluates the level of...

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PUM

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Abstract

The present invention relates to a method of operating a vehicle under frozen diesel emission fluid conditions, and in particular, a method of controlling a vehicle comprising: determining whether the diesel emission fluid is at least partially frozen; and determining whether the vehicle is currently in low diesel emission fluid run under the induction protocol. If the vehicle is not currently operating under the low diesel emission fluid induction protocol and the diesel emission fluid is at least partially frozen, a temporary minimum diesel emission fluid mass may be defined to prevent the vehicle from entering the low diesel emission fluid mass Drain fluid induction protocol.

Description

technical field [0001] The present invention generally relates to a method of controlling a vehicle using diesel exhaust fluid stored in a tank. Background technique [0002] Diesel exhaust fluids are used in conjunction with selective catalytic reduction catalysts to reduce nitrogen oxides in vehicle exhaust. Diesel exhaust fluid is stored in a tank provided on the vehicle. The tank may include three separate level sensors to determine the level of diesel exhaust fluid in the tank, ie the mass of diesel exhaust fluid remaining in the tank. Additionally, a separate level sensor can be used for refill detection when new diesel exhaust fluid is added to the tank. The vehicle operates under a non-frozen diesel exhaust fluid protocol when the diesel exhaust fluid is thawed, ie, in a liquid state. When under the non-frozen diesel exhaust fluid protocol, the diesel exhaust fluid mass is calculated by an algorithm, ie software, that assesses the level of diesel exhaust fluid in ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01N9/00
CPCF01N3/208F01N2610/02F01N2610/105F01N2900/0422F01N2900/08F01N2900/1811F01N2900/1814Y02T10/12Y02A50/20
Inventor R.J.达P.贾辛基维奇K.E.克劳福德J.D.马林斯M.金
Owner GM GLOBAL TECH OPERATIONS LLC