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Diagnostic systems and methods for fuel injectors in homogenous charge compression ignition (HCCI) engine systems

A fuel injector and engine technology, applied in fuel injection control, combustion engine, engine control, etc., can solve problems such as increasing cylinder pressure and increasing NVH

Inactive Publication Date: 2011-04-27
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Conversely, during HCCI combustion mode, insufficient fuel may result in inc

Method used

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  • Diagnostic systems and methods for fuel injectors in homogenous charge compression ignition (HCCI) engine systems
  • Diagnostic systems and methods for fuel injectors in homogenous charge compression ignition (HCCI) engine systems
  • Diagnostic systems and methods for fuel injectors in homogenous charge compression ignition (HCCI) engine systems

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Embodiment Construction

[0050] 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.

[0051] 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 means for providing the described functions.

[0052] The HCCI combustion mode may require precise A / F ratio control to prevent increased emissions and / or increased noise, vibration, and / or harshness (NVH). Excessive...

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Abstract

An engine control system for a homogenous charge compression ignition (HCCI) engine includes a fuel injector temperature determination module and a fuel injector control module. The fuel injector temperature determination module determines a temperature of a tip of a fuel injector based on a first temperature model when the HCCI engine is operating in an HCCI combustion mode, and determines the temperature of the tip of the fuel injector based on a second temperature model when the HCCI engine is operating in a spark ignition (SI) combustion mode. The fuel injector control module controls a fuel injector pulse width based on the determined temperature and a predetermined temperature threshold, wherein the fuel injector pulse width increases when the determined temperature is greater than the predetermined temperature threshold.

Description

technical field [0001] The present invention relates to homogeneous charge compression ignition (HCCI) engine systems, and more particularly, to a diagnostic system and method for fuel injectors in direct injection HCCI engine systems. Background technique [0002] The background description provided herein is for the purpose of generally presenting the context of the disclosure. A portion of the inventor's work is described in the Background section, and aspects of this section, and aspects of this description that were not otherwise prior art at the time of filing the application, are neither expressly nor impliedly admitted to be prior art that would destroy 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 an HCCI combustion mode, the A / F mixture may be automatically ignited ...

Claims

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Application Information

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IPC IPC(8): F02D41/22
CPCF02D2041/1436F02D41/3035Y02T10/128F02D2041/389Y02T10/44F02D41/40F02D2041/2065Y02T10/12Y02T10/40
Inventor J·T·施巴塔V·拉马潘A·P·巴纳斯科
Owner GM GLOBAL TECH OPERATIONS LLC