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Managing lean air/fuel transients in coordinated torque control

A torque control and torque technology, applied in the field of engine control systems, can solve problems such as inability to control signals quickly, inability to precisely control engine torque output, and inability to coordinate

Inactive Publication Date: 2010-05-12
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, conventional engine control systems cannot satisfactorily control engine torque output precisely
In addition, traditional engine control systems cannot respond quickly to control signals, nor can they coordinate engine torque control among devices that affect engine torque output

Method used

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  • Managing lean air/fuel transients in coordinated torque control
  • Managing lean air/fuel transients in coordinated torque control
  • Managing lean air/fuel transients in coordinated torque control

Examples

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Embodiment Construction

[0019] The following description is merely exemplary in nature and is not intended to limit the invention, its application or uses. For purposes of clarity, the same reference numbers have been used to identify the same elements in the drawings. As used herein, at least one of the phrases A, B, and C should be construed to mean logical (A or B or C) with a non-exclusive logical "or". It should be understood that steps within a method may be executed in different order without departing from the principles of the present invention.

[0020] As used herein, the term module refers to an application-specific integrated circuit (ASIC), an electronic circuit, a processor (integrated, dedicated or group) and memory that executes one or more software or hardware programs, combinational logic circuits, and / or Other suitable elements that can provide the described functions.

[0021] When a cold engine is started, one or more catalyst systems in the engine's exhaust system will be hea...

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PUM

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Abstract

The invention relates to managing lean air / fuel transients in coordinated torque control. An engine control system includes an air control module, a spark control module, a torque control module, a transient detection module, and a launch torque module. The air control module controls a throttle valve of an engine based on a commanded predicted torque. The spark control module controls spark advance of the engine based on a commanded immediate torque. The torque control module increases the commanded predicted torque when a catalyst light-off (CLO) mode is active, and increases the commanded immediate torque when a driver actuates an accelerator input. The transient detection module generates a lean transient signal when an air per cylinder increase is detected while the CLO mode is active. The launch torque module generates a torque offset signal based on the lean transient signal. The torque control module increases the commanded immediate torque based on the torque offset signal.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of US Provisional Application No. 61 / 051,580, filed May 8, 2008. The content of this application is incorporated in this application by reference. technical field [0003] The present invention relates to engine control systems and methods, and more particularly, to systems and methods for determining and managing lean air / fuel transients utilizing coordinated torque control. Background technique [0004] The background art described here is only to generally present the content of the present invention. The work done by the inventors of the present application within the scope of the description in the background section, and the description of that part that did not form the background art at the time of filing this application, can neither be expressly nor impliedly taken as a violation of the existing status of this application. technology. [0005] Internal combustion engines...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D43/00F02D41/02B60K6/24
CPCF02D11/105Y02T10/84F02D37/02F02D41/064Y02T10/26F02D41/0245F02D2250/21F02D41/18Y02T10/12
Inventor C·E·怀特尼M·S·埃莫里J·M·凯泽R·C·小西蒙C·A·威廉斯J·C·沃斯伯格E·费尔什C·M·索顿
Owner GM GLOBAL TECH OPERATIONS LLC
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