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Method for estimating and controlling accoustic noise during combustion

A technology of combustion noise and combustion mode, which is applied in electrical control, engine control, machine/engine, etc., and can solve problems such as in-vehicle application

Inactive Publication Date: 2012-03-14
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although combustion noise meters and analysis tools are useful during engine calibration, they may not be practical for direct on-board applications of real-time closed-loop control due to, for example, hardware cost or computing power requirements

Method used

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  • Method for estimating and controlling accoustic noise during combustion
  • Method for estimating and controlling accoustic noise during combustion
  • Method for estimating and controlling accoustic noise during combustion

Examples

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Embodiment Construction

[0052] Referring now to the accompanying drawings, which are shown in order to illustrate certain exemplary embodiments only and not to limit the present invention, figure 1 is a schematic diagram illustrating an exemplary internal combustion engine 10 , control module 5 , and exhaust aftertreatment system 15 constructed in accordance with embodiments of the present disclosure. Exemplary engines include a multi-cylinder direct injection compression ignition internal combustion engine having reciprocating pistons 22 connected to crankshaft 24 and movable within cylinders 20 defining variable volume combustion chambers 34 . The crankshaft 24 is operatively connected to the vehicle transmission and driveline for delivering tractive torque to the vehicle transmission and driveline in response to an operator torque request (To_REQ). The engine preferably operates on a four-stroke cycle, where each engine combustion cycle includes a 720-degree angular rotation of the crankshaft 24, ...

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Abstract

A method for controlling combustion in a direct injection internal combustion engine operable in a lean combustion mode includes monitoring in-cylinder pressure, utilizing a time-based filter to calculate an actual combustion noise based upon the monitored in-cylinder pressure, monitoring combustion control parameters utilized by the engine, determining an expected combustion noise based upon the monitored combustion control parameters, comparing the actual combustion noise to the expected combustion noise, and adjusting the combustion control parameters based upon the comparing.

Description

technical field [0001] The present disclosure relates to advanced diesel combustion. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and may not constitute prior art. [0003] Advanced diesel combustion modes with high exhaust gas recirculation (EGR) rates and early injection strategies can be used to meet emissions regulations. Early injection strategies may include premixed charge compression ignition (PCCI) and homogeneous charge compression ignition (HCCI). Advanced diesel combustion modes may also include limited temperature combustion (LTC). It is currently believed that at high EGR rates and injection inaccuracies, the noise of premixed combustion may reach unacceptable levels. [0004] For example, it is known to impose restrictions on air and / or fuel during basic engine calibration to control engine noise. However, these constraints are inevitably conservative and sacrifice effi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D43/00
CPCF02D35/023F02D2041/1432F02D2041/288F02D2200/025F02D2200/602
Inventor I.哈斯卡拉Y-Y.王C-B.M.宽F.A.马特库纳斯
Owner GM GLOBAL TECH OPERATIONS LLC