Title: Engine control systems and methods for nitrogen oxide reduction

Abstract

A fuel control module controls fuel injection of an engine based on a predetermined lean air/fuel ratio. The predetermined lean air/fuel ratio is fuel lean relative to a stoichiometric air/fuel ratio for the fuel. A cylinder control module selectively deactivates opening of intake and exhaust valves of M cylinders of the engine to increase removal of nitrogen oxide (NOx) from exhaust. M is an integer greater than 0 and less than a total number of cylinders of the engine. The fuel control module further: disables fueling of the M cylinders while opening of the intake and exhaust valves of the M cylinders is deactivated; and, while fueling of the M cylinders is disabled and opening of the intake and exhaust valves of the M cylinders is deactivated, controls fuel injection of other cylinders based on a predetermined rich air/fuel ratio that is fuel rich relative to the stoichiometric air/fuel ratio.

Inventors:

Sczomak, David P.; Gallon, Robert J.; McAlpine, Robert S.; Solomon, Arun S.

Issue Date:

2018-09-18

Research Org.:

GM Global Technology Operations LLC, Detroit, MI (United States)

Sponsoring Org.:

USDOE

OSTI Identifier:

1483376

Patent Number(s):

10077727

Application Number:

14/994,531

Assignee:

GM Global Technology Operations LLC (Detroit, MI)

Patent Classifications (CPCs):

F - MECHANICAL ENGINEERING F01 - MACHINES OR ENGINES IN GENERAL F01N - GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL

F - MECHANICAL ENGINEERING F02 - COMBUSTION ENGINES F02D - CONTROLLING COMBUSTION ENGINES

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F - MECHANICAL ENGINEERING F01 - MACHINES OR ENGINES IN GENERAL F01N - GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL

F01N2430/02 - by cutting out a part of engine cylinders

F - MECHANICAL ENGINEERING F02 - COMBUSTION ENGINES F02D - CONTROLLING COMBUSTION ENGINES

F02D13/00 - Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02T - CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

Y02T10/12 - Technologies for the improvement of indicated efficiency of a conventional ICE

F - MECHANICAL ENGINEERING F01 - MACHINES OR ENGINES IN GENERAL F01N - GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL

F01N2900/1614 - NOx amount trapped in catalyst
F01N2900/08 - said parameters being related to the engine
F01N3/0814 - {combined with catalytic converters, e.g. NOx absorption/storage reduction catalysts}

F - MECHANICAL ENGINEERING F02 - COMBUSTION ENGINES F02D - CONTROLLING COMBUSTION ENGINES

F02D13/06 - Cutting-out cylinders

F - MECHANICAL ENGINEERING F01 - MACHINES OR ENGINES IN GENERAL F01N - GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL

F01N3/0842 - {Nitrogen oxides}
F01N3/2066 - {Selective catalytic reduction [SCR]}

F - MECHANICAL ENGINEERING F02 - COMBUSTION ENGINES F02D - CONTROLLING COMBUSTION ENGINES

F02D2041/0012 - {with selective deactivation of cylinders}
F02D41/3005 - {Details not otherwise provided for}

F - MECHANICAL ENGINEERING F01 - MACHINES OR ENGINES IN GENERAL F01N - GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL

F01N2610/02 - the substance being ammonia or urea

F - MECHANICAL ENGINEERING F02 - COMBUSTION ENGINES F02D - CONTROLLING COMBUSTION ENGINES

F02D41/0087 - {Selective cylinder activation, i.e. partial cylinder operation
F02D41/0275 - {the exhaust gas treating apparatus being a NOx trap or adsorbent}
F02D2200/0806 - NOx storage amount, i.e. amount of NOx stored on NOx trap

F - MECHANICAL ENGINEERING F01 - MACHINES OR ENGINES IN GENERAL F01N - GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL

F01N2900/1818 - Concentration of the reducing agent
F01N2900/1622 - Catalyst reducing agent absorption capacity or consumption amount

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DOE Contract Number:  

EE00006853

Resource Type:

Patent

Resource Relation:

Patent File Date: 2016 Jan 13

Country of Publication:

United States

Language:

English

Subject:

42 ENGINEERING