SU879692A1

SU879692A1 - Method of testing dielectric strength of spark plug insulator

Info

Publication number: SU879692A1
Application number: SU792808842A
Authority: SU
Inventors: Леонид Лазаревич Лазарев; Ипполит Евгеньевич Белинович; Людмила Алексеевна Новикова; Михаил Иванович Баранов
Original assignee: Научно-исследовательский и экспериментальный институт автомобильного электрооборудования и автоприборов
Priority date: 1979-08-03
Filing date: 1979-08-03
Publication date: 1981-11-07

Description

1one

Изобретение относитс к способам диэлектрической прочности аппаратов зажигани и предназначено дл испытани автомобильных свечей зажигани .This invention relates to methods for the dielectric strength of ignition apparatuses and is intended for testing automotive spark plugs.

Известен способ контрол диэлектрической прочности изол тора свечи зажигани в сборе, состо щий в подаче вы- ссжого импульсного напр жени на центральный электрод и корпус свечи с помешенным между ними изол тором, погружении центрального электрода и теплового конуса изол тора в масло, предотвращающее поверхностный разр д, и в наблюдении пробо изол тора ij ,A known method for controlling the dielectric strength of the spark plug insulator assembly consists in applying a high impulse voltage to the central electrode and the candle body with the insulator interposed between them, immersing the central electrode and the thermal cone of the insulator into oil, preventing surface discharge. , and in observing the probe insulator ij,

Недостаток этого способа состоит в его технологической сложности, св занной с необходимостью окунать по сок теплового конуса изол тора в масло.The disadvantage of this method lies in its technological complexity associated with the need to dip the juice of the thermal cone of the insulator into oil.

Известен также способ контрол , состо щий в подаче высокого импульсного напр жени между электродами свечи, помещенными в замкнутый объем, подключении параллельно им искрового разр дника, постепенном повышении давлени вA control method is also known, consisting in supplying a high pulse voltage between the electrodes of a candle placed in a closed volume, connecting a spark discharge in parallel with it, gradually increasing the pressure in

замкнутом объеме до прекращени искрени между электродами и наблюдении пробо изол тора Г2 .a closed volume until the sparking between the electrodes is stopped and the G2 insulator probe is observed.

Недостаток этого способа состоит в его малой метрологической достоверности , так как наблюдать пробой изол тора после прекращени искрени непосредственно практически невозможно, а судить об ЭТОМ можно лишь косвенно, по прекращению искрени на параллельно включенном разр днике. The disadvantage of this method lies in its low metrological accuracy, since it is almost impossible to observe the breakdown of an insulator after termination of the arcing, and it can only be judged indirectly from the termination of the arcing on a parallel-connected bit.

Целью изобретени вл етс повышение точности контрол .The aim of the invention is to improve the accuracy of the control.

Поставленна цель достигаетс тем, что создают дополнительный последовательный искровой промежуток, измен ют величину параллельного искрового промежутка и регистрируют ту величину последнего , при которой обеспечнваефс нскрообразование на последовательном искровом промежутке. .This goal is achieved by creating an additional sequential spark gap, changing the value of the parallel spark gap, and registering the value of the latter at which the formation of the spark gap on the sequential spark gap is recorded. .

Claims

The drawing shows a device for carrying out a method for monitoring the dielectric strength of an insulator of an aegee plug. In a closed volume 1 of a capsule 2, made of a conductive material, electrodes 3 and 4 and insulator -5 of inspected candle 6 are placed. Between supply wire 8 there is a fixed electrode 9 and a movable electrode 10, forming a spark gap 1 parallel to the candle electrodes. 12 capsules 2 and movable electrode 13 form a spark gap 14 relative to the candle electrodes. The magnitude of the parallel spark gap 11 is recorded on a scale of 15. The method is carried out as follows. To check the dielectric strength of an insulator of a spark plug in a closed volume 1 of a capsule 2, a pressure is created at which the test voltage applied to the supply wire 7 and the common wire 8 can cause neither sparking between the electrodes of the candle or the surface discharge across the isolator toru. By moving the electrode 1О relative to the electrode 9, the required initial value of the parallel parallel spark gap is established. Moving the electrode 13 relative to the protrusion 12 establishes a consistent spark gap 14, the gap 14 being smaller or equal to the gap 11, applying voltage and moving the movable electrode 10, increasing the value of the parallel spark gap 14, increasing the test voltage to a predetermined maximum value, for example 18 kV, which is fixed on a scale of 15 by the division indicated by a bold line. If, upon reaching this magnitude, the sparking did not occur from the gap 11 to the additional gap 14, then the insulator dielectric strength is satisfactory, otherwise the insulator would have been punctured. , the test voltage is increased up to the switching of the arcing from a large gap to a small one and the magnitude of the crushing voltage is fixed on the same scale 15, the formula The method of controlling the dielectric npcPi of an insulator of a spark plug in a closed volume at a given pressure by visual observation of sparking on additional electrodes forming a parallel spark gap relative to the spark plug electrodes, characterized in that, in addition to measuring accuracy, they create an additional spark gap, change the magnitude of the parallel spark gap and register the magnitude of the latter, which provides sparking at consecutive spark gap. Sources of information taken into account in the examination 1. GOST 2043-74 p. 4. 7. 2, Prospectus of the company Ctiompioti Spark plugs, Cllqmpion, The device for servicing spark plugs SeHesfeoo, England, 1977,