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Engine knock signal processing method, device and engine

A technology of knock signal and processing method, which is applied in the direction of engine components, machines/engines, mechanical equipment, etc., can solve the problem that the acquisition and processing of knock signals are easily interfered by external signals, and achieve cost saving, good effect, and interference removal Good results

Active Publication Date: 2019-07-19
GREAT WALL MOTOR CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, the present invention aims to propose an engine knock signal processing method, device and engine to solve the problem that the knock signal is easily disturbed by external signals in the process of acquisition and processing

Method used

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  • Engine knock signal processing method, device and engine
  • Engine knock signal processing method, device and engine
  • Engine knock signal processing method, device and engine

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Embodiment Construction

[0030] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0031] In addition, the "first" and "second" mentioned in the embodiments of the present invention are only for the purpose of description, and should not be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features.

[0032] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0033] Embodiments of the present invention provide a method for processing engine knock signals, such as figure 1 As shown, the engine knock signal processing method includes:

[0034] Step S1, collecting knocking signals.

[0035] Due to the small amplitude of the knock signal, it is easy to be interfered by the outside world during the acquisition and transmission, such as the irregular vibration...

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Abstract

The invention relates to the technical field of engines and discloses an engine detonation signal processing method and device and an engine. The engine detonation signal processing method comprises the steps that a detonation signal is collected; the collected detonation signal is subjected to a first stage low-pass filtering; the detonation signal after the first stage low-pass filtering is converted to a digital signal, and second stage low-pass filtering is carried out; the detonation signal after the second stage low-pass filtering is subjected to band-pass filtering; and the detonation signal after the band-pass filtering is subjected to integration, and a energy value representing the strength of detonation in an air cylinder is obtained. According to the engine detonation signal processing method, the mode that the two-stage low-pass filtering and the first stage band-pass filtering are matched is adopted to process the detonation signal, the effect of removing interference is better, and the detonation signal is restored to a greater extent.

Description

technical field [0001] The invention relates to the technical field of engines, in particular to an engine knock signal processing method, device and engine. Background technique [0002] Knock is an abnormal combustion phenomenon of the engine. When the engine is in a normal combustion state, when it receives the ignition signal from the controller and ignites the combustible gas in the cylinder, the flame will spread around with the ignition point as the combustion center to generate power, so that the cylinder can work and output energy in a cycle. However, when there is too much carbon deposit in the cylinder or the ignition angle is too advanced, the local temperature of the cylinder will be too high due to pressure and temperature after ignition, and the surrounding gas will spontaneously ignite. In this case, multiple combustion centers will be generated, and the flames will encounter strong collisions during the propagation process, and the shock waves will be eject...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02B77/08
CPCF02B77/085
Inventor 于潇李雷龙帆张建彪
Owner GREAT WALL MOTOR CO LTD
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