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Method and system for determining engine knock background noise levels

An engine, knocking technology, applied in the direction of engine components, combustion engines, engine ignition, etc., can solve problems such as no indication of engine knocking, increase in background engine noise levels, etc.

Pending Publication Date: 2019-12-03
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 determining engine knock background noise levels
  • Method and system for determining engine knock background noise levels
  • Method and system for determining engine knock background noise levels

Examples

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Embodiment Construction

[0017] 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 . exist figure 2 The timing of the engine signal is shown in , to illustrate the effect of noise on the background noise level of engine knock. Engine systems can include such as image 3 filter shown in to determine the engine knock background noise level. can be based on Figure 4 method of operating the engine. exist Figure 5 shown in the Figure 4 The sequence of engine operations for the method.

[0018] Now turning to the graph, Figure 1A An example of a cylinder 14 of an internal combustion engine 10 that may be included in a vehicle 5 is depicted. Engine 10 may be a variable displacement engine (VDE), as described further below. Engine 10 may be controlled at least in part by a control system including controller 12 and by i...

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PUM

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Abstract

The invention provides a method and a system for determining engine knock background noise levels. Methods and systems are provided for operating a variable displacement engine that includes a knock control system. Engine knock background noise levels determined during all cylinders operating mode may be determined via two filters that are constructed in parallel. Output of the two filters may bethe basis for determining the presence or absence of engine knock.

Description

technical field [0001] The present application relates to methods and systems for establishing an engine knock background noise level dependent on operation of a noise generating device 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 increased for a desired engine torque output whi...

Claims

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Application Information

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IPC IPC(8): F02P5/152F02D41/22
CPCF02P5/152F02D35/027F02D41/22F02D41/009F02D41/28F02D2041/286G01L23/22F02D2041/281Y02T10/40F02D41/1498
Inventor 穆罕纳德·哈基姆埃米·尤盖希·卡尔尼克詹姆斯·金德利克里斯多夫·格鲁格拉罗伯特·巴斯金斯
Owner FORD GLOBAL TECH LLC
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