Diagnostic system and method for sensor in homogenous charge compression igintion engine system

A technology of compression ignition and homogeneous charge, applied in combustion engines, engine control, machines/engines, etc., can solve problems such as incomplete combustion of fuel

Active Publication Date: 2011-03-23
GM GLOBAL TECH OPERATIONS LLC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

More specifically, lower peak temperatures during combustion (compared to SI combustion mode) lead to incomplete combustion of the fuel

Method used

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  • Diagnostic system and method for sensor in homogenous charge compression igintion engine system

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Embodiment Construction

[0052] The following description is merely exemplary in nature and is in no way intended to limit the invention, its application or uses. For purposes of clarity, the same reference numbers will be used in the drawings to refer to similar elements. 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.

[0053] 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 combination of Logic circuits, and / or other suitable components for providing the described functions.

[0054] HCCI engine systems may require precise A / F ratio control during HCCI combustion mode to prevent emissions from increasing. Accordingly, accurate measurement...

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Abstract

The invention relates to a diagnostic system and a method for sensor in homogenous charge compression iginition engine system. An engine control system for a homogenous charge compression ignition (HCCI) engine includes an airflow determination module and a sensor diagnostic module. The airflow determination module generates a first plurality of estimates of airflow into the HCCI engine when the HCCI engine is operating in a first combustion mode, wherein the first plurality of estimates are based on an intake manifold absolute pressure (MAP), a mass air flow (MAF) rate, and a camshaft position. The sensor diagnostic module determines a state of at least one of a first plurality of sensors based on a predetermined threshold and differences between one of the first plurality of estimates and others of the first plurality of estimates, wherein the first plurality of sensors includes a MAP sensor, a MAF sensor, and a camshaft sensor.

Description

technical field [0001] The present invention relates to homogeneous charge compression ignition (HCCI) engine systems, and more particularly, to diagnostic systems and methods for sensors in HCCI engine systems. Background technique [0002] The background description provided herein is for the purpose of generally presenting the context of the disclosure. The work of the presently referenced inventors—to the extent described in this Background section—and aspects of that description that might not otherwise constitute prior art at the time of filing, neither express nor imply are admitted to be prior art for the present invention. [0003] Homogeneous charge compression ignition (HCCI) engines combust an air / fuel (A / F) mixture within cylinders to produce drive torque. HCCI engines can burn A / F mixtures in different combustion modes. For example, in the HCCI combustion mode, the A / F mixture auto-ignites (ie, compression ignition) when compressed by the piston. Alternativ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D41/18
CPCY02T10/128F02D2200/0406F02D41/187F02D41/222F02D2200/0402F02D41/3035Y02T10/12
Inventor J·T·施巴塔A·P·巴纳斯科
Owner GM GLOBAL TECH OPERATIONS LLC
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