Combustion information online detecting device for homogeneous compression-ignition and flame-ignition dual-mode gasoline engine

A gasoline engine, spark ignition technology, used in engine testing, measuring devices, internal combustion engine testing, etc., can solve the problem of high cost of combustion pressure sensors

Active Publication Date: 2007-02-28
TIANJIN UNIV
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Problems solved by technology

Combustion pressure sensors are expensive and require a redesign of the combustion chamber

Method used

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  • Combustion information online detecting device for homogeneous compression-ignition and flame-ignition dual-mode gasoline engine
  • Combustion information online detecting device for homogeneous compression-ignition and flame-ignition dual-mode gasoline engine
  • Combustion information online detecting device for homogeneous compression-ignition and flame-ignition dual-mode gasoline engine

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Embodiment Construction

[0024] The present invention will be further described below with reference to the accompanying drawings and through specific embodiments.

[0025] Homogeneous compression combustion and spark ignition combustion dual-mode ion current online detection device (as shown in Figure 1), a DC power module 4 is added to the two poles of the spark plug 1 as a bias voltage, and the polarity direction of the DC power module 4 makes the detected ion current signal 8 It is opposite to the direction of the signal detected on the detection resistor when the spark plug is ignited, which can effectively avoid the impact of the ignition high voltage on the ion current detection. At the same time, the detection resistor is placed at the negative pole of the DC power module 4, which can effectively reduce the interference of the power supply ripple voltage on the detection signal. The detection resistor 5 is connected to the high-voltage discharge electrode of the spark plug 1 through the one-way...

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Abstract

The invention relates to a uniform compression-ignition and splash ignition petrol engine burning information online detector, wherein it uses splash plug ion current to online detect the uniform compression-ignition state, to realize closed control of dual-mode burning. The invention is characterized in that: high-pressure ignition coil is serially connected to two one-way connectors, direct-current power module and detecting resistance; the splash plug is connected between two one-way connectors; the signal processing module is parallel connected to two ends of detecting resistance; the signal processing module processes the signal of detecting resistance to obtain one group of ion current character signal relative to burning; and it uses dynamic recursive program to obtain burning phase, instruction average effective pressure and mixing heating rate character value. The invention is characterized in that: it uses the ion current generated by splash plug, calculates the online internal burning phase, load, mixing heating rate character value and abnormal burning parameter, to directly support feedback information for the smooth transition between two burning modes.

Description

technical field [0001] The invention belongs to the detection technology of combustion parameters in cylinders of internal combustion engines, in particular to a method and device for online detection of combustion phase and combustion mode of a dual-mode gasoline engine of homogeneous compression combustion and spark ignition combustion. Background technique [0002] The homogeneous compression combustion (HCCI) method combines the advantages of gasoline engine homogeneous mixture and diesel engine without throttle and flame surface propagation, and can obtain the same high thermal efficiency and extremely low NOx and particulate emissions as direct injection diesel engines. There are many ways to achieve HCCI combustion, among which gasoline HCCI combustion based on internal residual exhaust gas management is considered to be the most practical way. According to the needs of operating conditions, a certain amount of combusted high-temperature ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M15/05G01M15/00
Inventor 谢辉吴召明孙燕辉
Owner TIANJIN UNIV
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