Piston group cylinder sleeve friction force wireless measuring method and implement device

A technology of wireless measurement and piston group, applied in measuring devices, force/torque/work measuring instruments, instruments, etc., can solve the problems of easy breakage of wires and measurement failure, and achieve the effect of low cost and convenient installation

Inactive Publication Date: 2016-04-13
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, the transmission of the axial force measurement of the connecting rod is mainly through the installation of the strain gauge on the connecting rod, and the signal is input to the strain gauge through the wire. Since the connecting rod and the

Method used

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  • Piston group cylinder sleeve friction force wireless measuring method and implement device
  • Piston group cylinder sleeve friction force wireless measuring method and implement device

Examples

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Embodiment

[0015] Examples of the present invention are figure 1 , figure 2 As shown, the present invention includes an experimental engine 1, a connecting rod 2, a strain gauge 3, a wireless transmission module 4, a receiving antenna 5, a pressure sensor 6, a charge amplifier 7, a photoelectric encoder 8, a signal acquisition module 9, a computer 10, and a strain gauge 3 Attached to both sides of the middle part of the connecting rod 2 and connected to the wireless transmission module 4, the receiving antenna 5 extends into the engine cylinder through the signal hole processed in the oil pan, the receiving antenna 5 is connected to the signal acquisition module 9, the photoelectric encoder 8 It is connected with the output shaft of the experimental engine 1 , the signal line of the photoelectric encoder 8 is connected with the signal acquisition module 9 , and the signal acquisition module 9 is connected with the computer 10 .

[0016] like figure 2 As shown, the working principle d...

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PUM

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Abstract

The invention provides a piston group cylinder sleeve friction force wireless measuring method and an implement device, which belong to the technical field of an internal combustion engine. The wireless measuring device comprises strain gauges, a wireless sending module, a receiving antenna, a pressure sensor, a charge amplifier, a photoelectric encoder, a signal acquisition module and a computer. The train gauges are attached to the two sides of the middle portion of a connection rod, and is connected with the wireless sending module; the receiving antenna extends into an engine cylinder through a signal hole in an engine oil pan; and the receiving antenna is connected with the signal acquisition module. The piston group cylinder sleeve friction force wireless measuring method and device are provided on the basis of a mean effective pressure indication method (IMEP), and thus the problem that in the wired measuring process, the connecting rod is always in a high-velocity motion state with a bent axle under the working condition of an engine, and it is necessary to design a special line-leading device to lead out a signal line, however, the line can be damaged easily, and the measuring system is disabled. The measuring method and device are reasonable in design, simple in structure and suitable for optimization design of a piston group cylinder sleeve friction force measuring system.

Description

technical field [0001] The invention relates to the technical field of engine testing, in particular to a wireless measurement method for the friction force of a piston group and a cylinder liner and an implementation device thereof. Background technique [0002] With the development of the automobile industry and the strengthening of environmental protection awareness, relevant laws and regulations have become more and more stringent for energy saving and emission reduction of engines. At the same time, the compactness and strengthening level of internal combustion engines are constantly improving, which puts forward higher requirements for high efficiency and low friction performance of engines. Currently, energy losses from mechanical friction in internal combustion engines account for 4-15% of the fuel energy consumed. It is well known that the friction loss of the piston group accounts for most of the overall mechanical loss of the engine. Improving the lubrication pe...

Claims

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Application Information

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IPC IPC(8): G01L5/00
CPCG01L5/00
Inventor 方聪聪孟祥慧谢友柏
Owner SHANGHAI JIAO TONG UNIV
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