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Method and system for adjusting engine knock background noise levels

A background noise, engine technology, applied in the direction of engine components, combustion engines, engine ignition, etc., can solve the problems of not indicating engine knocking, background engine noise level increase, etc.

Pending Publication Date: 2019-11-29
FORD GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Background engine noise levels may decrease when engine cylinders are deactivated and may increase when deactivated engine cylinders are reactivated
Varying background noise levels may cause the engine knock control system to indicate engine knock when it is not present, and may also cause the engine knock control system to not indicate engine knock when engine knock is present

Method used

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  • Method and system for adjusting engine knock background noise levels
  • Method and system for adjusting engine knock background noise levels
  • Method and system for adjusting engine knock background noise levels

Examples

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Embodiment Construction

[0022] The following description relates to systems and methods for operating a variable displacement engine (VDE) and controlling and detecting engine knock of the VDE engine. The engine can be in Figure 1A to Figure 1C type shown in . can be based on Figure 2 to Figure 11 method of operating the engine. The method may adjust VDE mode and fuel injector timing to allow continuous assessment of background engine noise levels for some engine cylinders. Furthermore, the method maintains engine knock background noise levels at or near their present values ​​even during VDE mode changes. Figure 12 to Figure 16 An exemplary sequence of adjusting VDE mode and fuel injection timing to provide a more consistent engine background noise level for some engine cylinders is shown. Figure 17 An engine timing sequence is shown that affects knock windows for only a few engine cylinders by controlling the action of fuel injectors associated with other engine cylinders. Figure 18 An ex...

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PUM

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Abstract

The present invention provides method and system for adjusting engine knock background noise levels. Methods and systems are provided for operating a variable displacement engine that includes a knockcontrol system. Engine knock background noise levels determined during all cylinders operating mode may be applied when one or more cylinders are deactivated to determine the presence or absence of engine knock. Additionally, engine knock background noise levels determined during all cylinders operating mode may be applied when one or more cylinders are reactivated such that the engine operates with all cylinder combusting so that the possibility of indicating knock when knock is not present may be avoided.

Description

technical field [0001] The present application relates to methods and systems for establishing an engine knock background noise level dependent on fuel injector operation and detecting engine knock responsive to the established engine knock background noise level. Background technique [0002] Internal combustion engines may experience detonation after ignition in one or more engine cylinders has been initiated by the spark and when the terminal gases are ignited by high temperature and pressure in the cylinders. The end gases are not ignited by the flame core created by the spark in the cylinder. Engine knock occurs most often at higher engine loads when the pressure in the cylinders of the engine is higher. [0003] It is also possible to operate the engine with a variable number of active or deactivated cylinders, also known as a variable displacement engine (or VDE), so that the engine's fuel economy can be optionally increased for a desired engine torque output while i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D43/00F02D35/02
CPCF02D17/02F02D35/027F02D37/02F02D41/0087F02D41/38F02D2041/389F02P5/1506F02D13/06F02D41/401F02D2200/101F02D2250/14F02P5/045F02P5/1521F02P9/002Y02T10/12Y02T10/40F01L13/0005F01L2013/001
Inventor 穆罕纳德·哈基姆克里斯多夫·格鲁格拉詹姆斯·金德利李·B·麦奎因
Owner FORD GLOBAL TECH LLC
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