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Diagnostic systems and methods for engine knock sensors

A knock sensor, engine technology, applied in combustion engine, engine control, machine/engine, etc., can solve problems such as increasing noise/vibration/acoustic-vibration roughness

Active Publication Date: 2010-08-25
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Additionally, engine knock can increase noise / vibration / harshness (NVH)

Method used

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  • Diagnostic systems and methods for engine knock sensors
  • Diagnostic systems and methods for engine knock sensors
  • Diagnostic systems and methods for engine knock sensors

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Embodiment Construction

[0017] The following description is merely exemplary in nature and is in no way intended to limit the invention, application or use. For purposes of clarity, the same reference numbers have been used in the drawings to identify similar elements. As used herein, the phrase "at least one of A, B, and C" should be construed as a logical (A or B or C) using a non-exclusive logical or. It should be understood that steps within a method may be executed in different order without altering the principles of the present invention.

[0018] As used herein, the term "module" refers to an application-specific integrated circuit (ASIC), an electronic circuit, a processor (shared, dedicated, or grouped) and memory, a combination of Logic circuits, and / or other suitable components that provide the described functionality.

[0019] A typical knock detection system may include a knock sensor and a knock detection circuit. Additionally, a dedicated knock detection system including knock sens...

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Abstract

The invention relates to diagnostic systems and methods for engine knock sensors. An engine control system includes a digital signal processing (DSP) module that generates a fast Fourier transform (FFT) of an engine knock signal generated by an engine knock sensor. An intensity determination module determines an engine knock intensity based on one of a maximum of and an average of the FFT. A status determination module determines a status of the engine knock sensor based on the engine knock intensity, a plurality of predetermined knock intensity thresholds, and a rotational speed of an enginecrankshaft.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to US Provisional Application No. 61 / 141743, filed December 31, 2008. The content of the aforementioned application is incorporated herein by reference in its entirety. technical field [0003] The present invention relates to engine sensor diagnostics, and more particularly to diagnostic systems and methods for engine knock sensors. Background technique [0004] The background art provided herein is for the purpose of generally presenting the context of the disclosure. The work of the presently named inventors, to the extent described in this Background section, and aspects of this description that are otherwise insufficient to be prior art at the time of filing, are neither expressly nor impliedly admitted to be relevant to The present invention conflicts with the prior art. [0005] The internal combustion engine draws air through the intake pipe into the intake manifold. Air is ...

Claims

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Application Information

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IPC IPC(8): F02D41/22G01M15/04G01L23/22
CPCF02D2041/288F02D41/222Y02T10/40F02D35/027
Inventor W·B·哈马马C·M·索顿R·J·霍尔纳E·费尔奇H·M·埃斯法汉
Owner GM GLOBAL TECH OPERATIONS LLC