Gm Global Technolgoy Operations, Inc.

John Zeilstra

Julian C Tan

Gustavo Tepedino

Christoph Thoele

An engine control system includes an injection determination module and an injection regulation module. The injection determination module determines a desired rate of hydrocarbon (HC) injection into exhaust gas produced by an engine for regeneration of a particulate matter (PM) filter. The injection regulation module increases a rate of HC injection from a first rate to the desired rate during a predetermined period before regeneration of the PM filter, wherein the predetermined period is based on a difference between a predetermined temperature and a temperature at an outlet of an oxidation catalyst (OC).

Control system and method for preventing hydrocarbon slip during particulate matter filter regeneration

A method and control system for controlling an engine during diesel particulate filter regeneration includes a diesel particulate filter (DPF) regeneration request module that generates a DPF regeneration request signal and an idle condition module that generates an idle condition signal when the engine is at an idle condition. A DPF regeneration control module initiates a timer in response to the DPF regeneration request signal and the idle condition signal. The DPF regeneration control module controls the engine oxygen level to a second level less than a first level corresponding to a non-idle speed level, and after a time period, controls the engine to generate oxygen at a third level greater than the second level.

Method and system for controlling an engine during diesel particulate filter regeneration at idle conditions

A method and control system for controlling an engine during diesel particulate filter regeneration includes a diesel particulate filter (DPF) regeneration request module that generates a DPF regeneration request signal. The control system also includes a DPF regeneration control module that controls the oxygen level in the exhaust based on an oxygen level signal corresponding to an oxygen level in the exhaust and a DPF inlet temperature signal corresponding to the DPF inlet temperature.

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Chicago, IL, United States of America

John Zeilstra