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Phase and frequency error based asymmetrical afr pulse reference tracking algorithm using the pre-catalyst o2 sensor switching output

A frequency and frequency correction technology, applied in electrical control, machine/engine, fuel injection control, etc.

Inactive Publication Date: 2009-04-01
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The control module determines the dither signal

Method used

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  • Phase and frequency error based asymmetrical afr pulse reference tracking algorithm using the pre-catalyst o2 sensor switching output
  • Phase and frequency error based asymmetrical afr pulse reference tracking algorithm using the pre-catalyst o2 sensor switching output
  • Phase and frequency error based asymmetrical afr pulse reference tracking algorithm using the pre-catalyst o2 sensor switching output

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Embodiment Construction

[0022] The following description is merely exemplary in nature and in no way serves to limit the invention, its application or uses. For the sake of clarity, the same reference numerals are used to refer to the same parts in the figures. As used herein, the phrase "at least one of A, B, and C" should be construed to mean a logical (A or B or C) using a non-exclusive logical or. It should be understood that steps within a method may be executed in different order without altering the principles of the present invention.

[0023] As used herein, the term "module" refers to an Application Specific Integrated Circuit (ASIC), an electronic circuit, a processor (shared, dedicated or grouped) and memory, a combinational logic circuit, and / or other suitable components that provide the described functionality.

[0024] In order to reduce the calibration costs associated with conventional fuel control systems, the fuel control system of the present invention allows for direct achievem...

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Abstract

A fuel control system of an engine system comprising a pre-catalyst exhaust gas oxygen (EGO) sensor and a control module. The pre-catalyst EGO sensor determines a pre-catalyst EGO signal based on an oxygen concentration of an exhaust gas. The control module determines a dither signal. The control module determines a fuel command based on the pre-catalyst EGO signal and the dither signal.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to US Provisional Application No. 60 / 956,590, filed August 17, 2007. The entire contents of the above application are hereby incorporated by reference. technical field [0003] This application relates to engine control systems, and more particularly to fuel control systems for internal combustion engines. Background technique [0004] The background description provided herein is for the purpose of summarizing the context of the disclosure. To the extent this Background section describes the work of the presently identified inventors, and the features described are not considered to be prior art at the time of filing, the description is neither stated nor implied to be prior art to the present invention. [0005] The fuel control system reduces gasoline engine emissions. A fuel control system may include an inner feedback loop and an outer feedback loop. An inner feedback loop may...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D41/04F02D41/26
CPCF02D41/1454F02D41/2458F02D41/1439
Inventor S·刘K·P·杜贝克R·D·沙夫托
Owner GM GLOBAL TECH OPERATIONS LLC
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