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Method and system for detecting engine knock during transient conditions

An engine and knocking technology, applied in engine components, combustion engines, engine ignition, etc., can solve problems such as unreliable and difficult to accurately assess the presence or absence of engine knocking

Pending Publication Date: 2020-04-17
FORD GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, engine knock background noise levels based on steady state (e.g., conditions where engine speed and engine load vary by less than 15% of their average value) conditions and applied to determine the presence or absence of engine knock are not may not be reliable during
Therefore, it may be difficult to accurately assess the presence or absence of engine knock during transient engine conditions

Method used

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  • Method and system for detecting engine knock during transient conditions
  • Method and system for detecting engine knock during transient conditions
  • Method and system for detecting engine knock during transient conditions

Examples

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Embodiment Construction

[0015] The following description relates to systems and methods for operating an engine including a knock control system. The engine can be Figure 1A to Figure 1C type shown in . can be based on figure 2 way to operate the engine. The method may use both steady state and transient engine knock background noise levels to determine the presence or absence of engine knock. image 3 An engine operating sequence including an engine knock window is shown. Figure 4 A block diagram showing how the overall engine knock background noise level may be determined. Figure 5 shown for the figure 2 A method for detecting engine knock for an engine operating sequence.

[0016] Turning now to the attached drawings, 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 controlled at least partially by a control system including controller 12 and by input from a human vehicle operator 130 via an inp...

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Abstract

The present invention provides a method and system for detecting the engine knock during transient conditions. Methods and systems are disclosed for operating an engine that includes a knock control system that may determine the contributions of individual transient and steady-state noise sources to an engine background noise level. The contributions of the transient and steady-state individual noise sources may be the basis for establishing the presence or absence of knock in one or more engine cylinders.

Description

technical field [0001] The present application relates to methods and systems for applying engine knock background noise levels when the engine is operating under dynamically changing conditions. Background technique [0002] The engine may be operated during conditions in which engine load and speed vary with vehicle operating conditions. For example, engine load may change in response to a human driver applying or releasing an accelerator pedal. When the transmission is shifted from first to second gear, the engine speed may change. If the engine is operating at an advanced spark timing with a minimum spark advance near optimum torque or at an engine knock limited spark timing, the engine may enter a knock condition and knock as the engine speed and / or engine load changes. The engine may knock when the exhaust gases in the engine cylinders ignite before they are ignited by the flame front of the spark generated via the spark plug. Ignition of exhaust gases can cause hig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02P5/152
CPCF02P5/152F02D35/027F02D41/107F02D2200/025F02D2200/1012F02D2250/14F02P5/1521Y02T10/40
Inventor 克里斯多夫·保罗·格鲁格拉兰尼·基万穆罕纳德·哈基姆
Owner FORD GLOBAL TECH LLC
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