Title:
METHOD AND APPARATUS FOR POSITIONING LEAKING CYLINDER IN ENGINE, AND OSCILLOSCOPE
Document Type and Number:
WIPO Patent Application WO/2022/142937
Kind Code:
A1
Abstract:
A method and apparatus (300) for positioning a leaking cylinder in an engine (60), and an oscilloscope (40). The method comprises: determining a calibration cylinder and a physical location of the calibration cylinder; acquiring a waveform of an output voltage of the engine power supply (70) and a waveform of a firing signal of the calibration cylinder; identifying a first preset waveband in the waveform of the firing signal, and determining a waveband time corresponding to the first preset waveband; identifying second preset wavebands in the waveform of the output voltage, classifying the second preset wavebands, and determining a cylinder identifier corresponding to each type of the second preset wavebands; sorting the cylinder identifiers to generate a cylinder identifier sequence, and determining a first sequence position and a second sequence position in the cylinder identifier sequence; and determining a physical location of the leaking cylinder in the engine (60) according to a preset firing sequence of multiple cylinders (1, 2, 3, 4), the first sequence position, the second sequence position, and the physical location of the calibration cylinder in the engine (60).
Inventors:
XU DONGDONG (CN)
Application Number:
PCT/CN2021/133926
Publication Date:
July 07, 2022
Filing Date:
November 29, 2021
Export Citation:
Assignee:
AUTEL INTELLIGENT TECH CORP LTD (CN)
International Classes:
F02B77/08
Foreign References:
| CN112796880A | 2021-05-14 | |||
| JP2005264853A | 2005-09-29 | |||
| CN111720232A | 2020-09-29 | |||
| CN110513203A | 2019-11-29 | |||
| DE102019201149A1 | 2020-07-30 |
Attorney, Agent or Firm:
AFD CHINA INTELLECTUAL PROPERTY LAW OFFICE (CN)
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