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HCCI combustion moding state control for fuel economy and seamless transitions

A mode, fuel rate technology, applied in electrical control, combustion engine, engine control, etc., can solve problems such as torque disturbance

Active Publication Date: 2014-06-11
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The two-step valve lift method has a step change between SI mode and HCCI mode, and this results in unwanted torque disturbances during transitions

Method used

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  • HCCI combustion moding state control for fuel economy and seamless transitions
  • HCCI combustion moding state control for fuel economy and seamless transitions
  • HCCI combustion moding state control for fuel economy and seamless transitions

Examples

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Embodiment Construction

[0020] The following description is merely exemplary in nature and is not intended to limit the disclosure, its application, or uses. For purposes of clarity, the same reference numbers will be used in the drawings to indicate 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 disclosure.

[0021] As used herein, the term module refers to an application-specific integrated circuit (ASIC), electronic circuit, processor (shared, dedicated or grouped) and memory, combinational logic circuit and / or Or other suitable components that provide the described functionality.

[0022] The engine control system according to the present disclosure operates the gasoline engine in the SI mode and the HCCI mode. HCCI mode reduces fuel consumption but is ...

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PUM

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Abstract

A method and system for controlling an engine includes a homogeneous charge compression ignition (HCCI) operating zone boundary module determining a first HCCI operating boundary and a fuel rate module determining a first fuel rate from an operator input. The system also includes a switch module modifying the first HCCI operating boundary to a modified boundary in response to a measured mass airflow, cam positions and the first HCCI operating boundary. The system also includes a combustion control module operating the engine in a spark ignited mode when a second fuel rate request is outside the modified boundary.

Description

technical field [0001] The present invention relates to engine control systems, and more particularly to engine control systems for engines operating in spark ignition and homogeneous charge compression ignition (HCCI) modes. Background technique [0002] The background art provided herein is for the purpose of generally presenting the context of the disclosure. The work of the presently named inventors (to the extent described in this Background section) and aspects of this description that are not otherwise considered prior art at the time of filing are neither express nor implied to be admitted as prior art that contradicts the present invention. [0003] The engine can operate in a spark ignition (SI) mode and a homogeneous charge compression ignition (HCCI) mode. HCCI mode involves compressing the mixture of fuel and oxidizer to the point of autoignition. One of the modes may be selected based on engine speed and load. In HCCI mode, ignition occurs at several locati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D43/00
CPCF02B2075/125F02B17/005F02D41/3035Y02T10/123Y02T10/128F02B1/02Y02T10/12
Inventor V·拉马潘J·-M·康
Owner GM GLOBAL TECH OPERATIONS LLC