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Oxygen sensor heater control strategy

An oxygen sensor and heater technology, applied in electrical control, engine control, fuel injection control, etc., can solve the problem of unreliable output of oxygen sensor 116

Inactive Publication Date: 2009-12-02
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Thus, after the engine is started, the output of the oxygen sensor 116 is likely to be unreliable

Method used

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  • Oxygen sensor heater control strategy
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Examples

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Embodiment Construction

[0025] The following description is merely exemplary in nature and is in no way intended to limit the disclosure, its application, or uses. For purposes of clarity, the same reference numbers have been used in the drawings to identify similar elements. As used herein, the phrase "at least one of A, B, and C" should be understood 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 disclosure.

[0026] As used herein, the term "module" refers to an Application Specific Integrated Circuit (ASIC), an electronic circuit, a processor (shared, dedicated, or group) and memory, a combination of Logic circuits, and / or other suitable components that provide the described functionality.

[0027] The oxygen sensor measures and outputs the concentration of oxygen in the exhaust system. The engine controller adjusts the air / fuel (A / F) mixture b...

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Abstract

The invention relates to an oxygen sensor heater control strategy. A heating module for an oxygen sensor comprises an estimated mass module, a cumulative mass module, and a temperature control module. The estimated mass module determines an estimated mass of intake air to remove condensation from an exhaust system after startup of an engine. The cumulative mass module determines a cumulative mass of intake air after the engine startup. The temperature control module adjusts a temperature of an oxygen sensor measuring oxygen in the exhaust system to a first predetermined temperature after the engine startup and adjusts the temperature to a second predetermined temperature when the cumulative air mass is greater than the estimated air mass, wherein the second predetermined temperature is greater than the first predetermined temperature.

Description

[0001] Cross References to Related Applications [0001] This application claims the benefit of US Provisional Application No. 61 / 012,158, filed December 7, 2007. The disclosure of the aforementioned application is hereby incorporated by reference in its entirety. technical field [0002] The present invention relates to internal combustion engines, and more particularly to oxygen sensor control. Background technique [0003] The background description provided herein is for the purpose of generally presenting the context of the disclosure. The work of the named inventor is not, expressly and implicitly, admitted to be prior art to the present disclosure to the extent described in the Background section, and a description that would otherwise be insufficient to be prior art at the time of filing . [0004] now refer to figure 1 , shows a functional block diagram of the engine system 100 . Air is introduced into the engine 102 through an intake manifold 104 . The thro...

Claims

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Application Information

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IPC IPC(8): F02D41/14G01N27/406
CPCF02D2200/0402F02D41/1494F02D2200/0418Y10T436/207497Y10T436/208339
Inventor J·F·阿当斯L·A·阿瓦隆D·W·麦克金J·A·塞尔J·W·西基南J·R·弗德约
Owner GM GLOBAL TECH OPERATIONS LLC
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