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Engine knocking measurement device

A technology of measuring device and engine, applied in the direction of measuring device, measuring rapid changes, instruments, etc., can solve problems such as time-consuming, difficult installation, increase test cost, etc., and achieve the effect of improving test efficiency and reducing test cost.

Inactive Publication Date: 2017-05-31
GUANGXI YUCHAI MASCH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the above method of measuring knocking needs to install the cylinder pressure sensor and the crankshaft position sensor at the same time. The position sensor has problems such as time-consuming, difficult installation, increased test cost, and inability to install on the entire vehicle.

Method used

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Embodiment Construction

[0013] The specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific embodiments.

[0014] Unless expressly stated otherwise, throughout the specification and claims, the term "comprise" or variations thereof such as "includes" or "includes" and the like will be understood to include the stated elements or constituents, and not Other elements or other components are not excluded.

[0015] like Figure 1 to Figure 3 As shown, the measuring device for engine knock according to the specific embodiment of the present invention includes a cylinder pressure sensor 1, a charge amplifier 2, a data acquisition card 3 and a knock determiner 4, wherein the cylinder pressure sensor 1 is used to be installed in a cylinder On the engine of the pressure sensor installation hole, the cylinder pressure sensor 1 is us...

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Abstract

The invention discloses an engine knocking measurement device. The device comprises a cylinder pressure sensor which is installed on an engine with a cylinder pressure sensor installation hole and is used for sensing the cylinder pressure in a combustion chamber, a charge amplifier which is used for converting a charge signal sensed by the cylinder pressure sensor into a voltage signal, a data collection card which is used for collecting the voltage signal output by the charge amplifier, and a knocking judger which is used for getting a knocking peak PK according to a cylinder pressure signal collected by the data collection card, comparing the knocking peak PK with a preset knocking threshold TPK, judging that engine knocking is carried out if the knocking peak PK is greater than the knocking threshold TPK, and judging that engine knocking is not carried out if the knocking peak PK is smaller than the knocking threshold TPK. The device only needs the cylinder pressure sensor, and does not need a crankshaft position sensor. Therefore, the test cost in the process of engine research and development process is reduced, and the test efficiency is improved.

Description

technical field [0001] The invention relates to the field of ignition engine knock measurement, in particular to a measuring device for engine knock. Background technique [0002] With the increasingly stringent emission regulations, in order to protect the environment, it is required to remove lead from gasoline. At the same time, as the petroleum energy is increasingly depleted, the price of fuel is increased. In order to improve the fuel economy of the ignition engine and the power of the engine, the engine often achieves the goal by increasing the compression ratio and increasing the ignition advance angle. This also increases the tendency of the engine to knock, a slight knock is beneficial to improve the performance of the engine, and a strong knock will damage the engine. Therefore, it is very important to control the limit of knock well during engine development. When the engine knocks, there will be high-frequency pressure vibration after the highest point of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L23/22
CPCG01L23/221
Inventor 何健阮军武李松松尹光跃
Owner GUANGXI YUCHAI MASCH CO LTD
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