• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    1537552 Detecting wear electrically SOC D'ETUDES DE MACHINES THERMIQUES 14 July 1976 [1 Oct 1975] 29195/76 Heading G1N The degree of wear of a first element in sliding contact with a second element is determined by measuring the variation in the reluctance of the first element as it slides past the second element. An inductive sensor 10 is positioned in bores 8, 9 of cylinder block 7 and liner 6 of an internal combustion engine 1 so as to have its end flush with the liner 6 so that during the reciprocating motion of the piston 2 all the piston rings 5a-e successively pass the sensor. The sensor output is connected via amplifying and filter stage 11 to CRT 12. With the piston 2 in its upper position sensor 10 supplies a constant level signal S1, then as the ring 5a passes in front of the sensor 10 a pulse I, is produced and similarly pulses I 2 , I 3 , I 4 , I 5 are generated as the remaining rings pass the sensor 10. Due to rings 5a, b, c being located in the steel head 3 of the piston whereas rings 5d, e are in the aluminium skirt 4 the level between the rings changes from S 1 to S 2 . The upper ring 5e is chromium plated on its outer surface in contact with liner 6 so that its permeability is lower than that of the other rings. Thus as the chromium of ring 5a wears away the reluctance of this ring increases in a greater proportion to that of the other rings and the output signal increases from I 5 to I' 5 to I" 5 as the wear increases. The sensors may be mounted in the cylinder on to the same level and in diametrically opposite relationship so that a deformation of the piston ring can be detected when there is no coincidence between the two pulses produced.
    公开号:SU710530A3
    申请号:SU762379554
    申请日:1976-07-06
    公开日:1980-01-15
    发明作者:Симон Рене Руам Жан
    申请人:Сосьете Д,Этюд Де Машин Термик Сэмт (Фирма)；
    IPC主号:
    专利说明:

    (54) METHOD OF WEIGHT CONTROL
    Shen 2 is located in the internal dead center, a constant signal is received from the sensor with amplitude S (Fig. 3).
    At the moment of time when the piston moves to the outside dead center, ring 5 passes against sensor 10 and a pulse 1 appears at instrument 12, the occurrence of which is due to a change in magnetic flux, since the magnetic permeability of the ring is different than the magnetic permeability of the piston. A constant signal S is developed between the piston rings.
    Thus, when the piston moves to the external dead center, the sensor 10 produces a series of consecutive pulses 1, 1 ,, I ,, 1e, Ij, etc. according to the number of rings 5 placed on the piston. The change of the constant signal 5 on S2 is due to the fact that part of the rings is placed on the steel head 3 of the piston 2, and the magnetic permeability of the head is different than the magnetic permeability of the housing 4.
    Since the coating 13 of the piston ring 5 has a low magnetic permeability coefficient, the amount of impulses produced by the sensor 10 changes as the coating wears out. Therefore, as the coating wears, the impulse increases, which is shown in FIG. 3 for the first ring 5. With a fully worn coating, the impulse has a value of l and for a non-worn one, a value of 15 ..
    By setting the reference impulse l, which determines the allowable degree of wear of the coating 13, it is possible to determine with great precision the amount of wear of the coating, since the value of the reference impulse Ig. Can be predetermined with a high degree of accuracy.
    Thus, the implementation of the method provides increased accuracy of wear control.
    权利要求:
    Claims (1)
    [1]
    Invention Formula
    A method of controlling wear, for example, of a piston ring with a coating whose magnetic permeability is less than the magnetic permeability of the ring material, by measuring the magnitude of the flow during the ring operation, characterized in that, in order to increase the wear control accuracy, simultaneously with the measurement of the magnetic flux, a reference signal is formed , compare the reference signal with the measured and the magnitude of the deviation of the measured signal from the reference determine the amount of wear of the ring.
    Sources of information taken into account during the examination 1. Stefanovsky B.S. and others. Testing engines of internal combustion. M., Mechanical Engineering, 1972, p. 72-73.
    Fig.}
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    同族专利:
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    BR7604947A|1977-08-09|
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    AU1474176A|1977-12-15|
    DK258576A|1977-04-02|
    JPS5735765B2|1982-07-30|
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    IN147161B|1979-12-01|
    DE2642520A1|1977-04-14|
    SE431255B|1984-01-23|
    PL108725B1|1980-04-30|
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    JPS5243450A|1977-04-05|
    US4143319A|1979-03-06|
    DE2642520B2|1979-01-04|
    YU142176A|1984-06-30|
    FR2346713A1|1977-10-28|
    NO761823L|1977-04-04|
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    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    JPS5210382B2|1973-05-04|1977-03-23|
    DE2445111C3|1974-09-20|1986-02-13|B & W Diesel A/S, Koebenhavn/Kopenhagen|Device for measuring changes in the area of machine parts by inductive means|US4328462A|1978-11-06|1982-05-04|Carrier Corporation|Erosion probe having inductance sensor for monitoring erosion of a turbomachine component|
    US4444049A|1980-12-22|1984-04-24|Froude Consine Limited|Engine testing apparatus and methods|
    JPS57130747A|1981-02-04|1982-08-13|Nippon Kokan Kk <Nkk>|Continuous casting method for steel|
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    GB8319550D0|1983-07-20|1983-08-24|Grange Packing Ltd|Seal wear indicator|
    CA1261170A|1985-10-11|1989-09-26|Her Majesty The Queen In Right Of Canada As Represented By The Minister Of National Defence Of Her Majesty's Canadian Government|Ferromagnetic wear detector and method|
    JPH0432565Y2|1986-08-29|1992-08-05|
    GB2214642A|1988-01-19|1989-09-06|Outboard Marine Corp|Apparatus for detecting the position of a piston ring in an internal combustion engine|
    JP2597019B2|1990-01-19|1997-04-02|三菱重工業株式会社|Piston ring wear diagnosis method|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    FR7530108A|FR2346713B1|1975-10-01|1975-10-01|
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