Engine dynamic valve gap signal detecting device and engine dynamic valve gap signal detecting method

A valve clearance and signal detection technology, applied in the direction of mechanical clearance measurement, etc., can solve the problem that the feeler gauge cannot test the valve clearance, etc., and achieve the effect of light weight, high measurement accuracy and strong portability

Active Publication Date: 2017-08-11
DONGFENG CUMMINS ENGINE
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Problems solved by technology

[0003] The purpose of the present invention is to provide a dynamic valve clearance signal detection device for an engine, which solves the disadvantage that the feeler gauge cannot perform valve clearance testing during engine operation

Method used

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  • Engine dynamic valve gap signal detecting device and engine dynamic valve gap signal detecting method
  • Engine dynamic valve gap signal detecting device and engine dynamic valve gap signal detecting method
  • Engine dynamic valve gap signal detecting device and engine dynamic valve gap signal detecting method

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Embodiment Construction

[0043] In order to better explain the present invention, the main content of the present invention is further clarified below in conjunction with specific examples, but the content of the present invention is not limited to the following examples.

[0044] Such as Figure 1-5 Shown: an engine dynamic valve clearance signal detection device, which is installed on the engine valve train, it includes a detection rocker arm 3, the detection rocker arm 3 includes the upper horizontal arch arm 3.1 and the lower bow arm 3.2, the detection rocker arm The two ends of 3 are provided with mounting holes 3.3 and through holes 3.4 respectively; the middle section of the horizontal arch arm 3.1 is a horizontal plane 3.11, and the horizontal plane 3.11 is provided with two bolt holes 3.1a.

[0045] The signal trigger lifter 2 is fixed in the mounting hole 3.3 through the top bolt 2.2; the bottom surface of the signal trigger lifter 2 is provided with a cam 1, and the other end of the detecti...

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Abstract

The invention discloses an engine dynamic valve gap signal detecting device and an engine dynamic valve gap signal detecting method. The engine dynamic valve gap signal detecting device is disposed on an engine gas distribution mechanism, and comprises a detecting rocker arm. One end of the detecting rocker arm is vertically provided with a signal trigger tappet, the bottom surface of which is provided with a cam. The other end of the detecting rocker arm is vertically provided with a thimble. The bottom part of the thimble is connected with a valve stem, and the arm surface of the detecting rocker arm is horizontally provided with a signal detecting unit, and the bottom surface of the other end of the signal detecting unit is contacted with the top part of the thimble. The signal trigger tappet and the signal detecting unit are connected with a signal processing module. The engine dynamic valve gap signal detecting device has a valve gap signal calibrating mode and a valve gap signal processing mode, and the structure of the detecting device is simple, and then by adopting the above mentioned mode for cooperated detection, the engine dynamic valve gap signal detecting method is formed. The dynamic valve gap signal detecting method is not affected by engine vibration and external vibration, and has advantages of good reliability, high measuring precision, convenient analysis and calculation, strong applicability, light weight, and strong portability.

Description

technical field [0001] The invention relates to the technical field of engine testing, in particular to an engine dynamic valve clearance signal detection device and method. Background technique [0002] At present, the engine valve clearance can usually only be measured by the feeler gauge method in the cold state, that is, when it is not running, and there is no better method to measure the hot state valve clearance during its operation. Therefore, the setting of the cold valve clearance value of many newly developed models is based on other similar mature models. The valve clearance obtained in this way may not be the most appropriate due to the thermal expansion and contraction of the valve in the actual use process, and may even be affected. There are many related failures such as the small valve clearance causing the valve to close loosely or the large valve clearance causing the reduction of intake and exhaust efficiency. Therefore, directly detecting the dynamic valv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B5/14
CPCG01B5/14Y02T10/12
Inventor 宋单平许超王勇刘威谢平郑国世
Owner DONGFENG CUMMINS ENGINE
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