CN2228657Y

CN2228657Y - Spark plug tester

Info

Publication number: CN2228657Y
Application number: CN95210841U
Authority: CN
Inventors: 邹纪平; 钟琼莎
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-05-17
Filing date: 1995-05-17
Publication date: 1996-06-05
Anticipated expiration: 2005-05-17

Abstract

The utility model relates to a spark plug tester which is used for detecting the performance of spark plugs, mainly comprising power supply, a switch, a spark plug seat and a high voltage generator. Both electrodes of the spark plug seat are connected with the output electrode of the high voltage generator which is a positive feedback transistor self-excited oscillating circuit formed by the coupling of transformer coils. The positive feedback transistor self-excited oscillating circuit comprises a capacitance, a transistor, coupled coils and a resistance. The utility model has the advantages of compact structure, small size, convenient portability, safe operation, etc., and is an ideal tool for simply selecting the spark plug for automobile drivers, vehicle repair shops and fitting stores.

Description

The spark plug pick-up unit

The utility model relates to the spark plug performance checkout equipment, particularly a kind ofly detects the pick-up unit that spark plug sparking encircles well.

Spark plug is the critical piece in the igniting system, if performance is bad, the starting of engine will directly be had influence on, cause running unstable, be short of power and oil consumption widely, reduced the useful power of engine, in order to prevent the generation of these situations, people usually remove spark plug its performance (arcing situation) are detected in actual use.Pick-up unit to spark plug has many at present, its detection method is outer in following several method: first method is when the moving commentaries on classics of low engine speed, with short circuit between the hi-line of tested spark plug and cylinder block, if this moment is the engine shake, running is unstable, illustrate that spark plug is normal, otherwise spark plug has fault; Second method is that spark plug is disposed across the cylinder body bonding, the hi-line termination of distributor plate central authorities jack is contacted with plug joint, open ignition switch, stir breaker point, watch interelectrode arcing situation,, represent that then insulator punctures jumping if no-spark is skipped, as there being strong spark to skip between electrode, prove that spark plug is good; These two kinds of methods all are to get on to test the spark plug situation in actual vehicle, and its testing process is subjected to the restriction of time, place condition, and are a kind of easy method of operating.In addition, notification number is that the utility model patent of CN2121545U discloses a kind of high-voltage spark test unit, though it can make things convenient for it to detect the arcing situation of spark plug; But necessary in use external 12V direct supply is made troubles to use.

The utility model is to provide a kind of at above-mentioned situation to obtain high-tension volume spark plug pick-up unit little, easy to carry by transistor circuit.

Goal of the invention of the present utility model is by realizing in the F mode: it includes power supply, switch, spark plug adapter and a high pressure generator, two of spark plug adapter link to each other with the high voltage output stage of high pressure generator respectively, high pressure generator is the positive feedback transistor self-maintained circuit that the transformer coil coupling forms, and the high pressure generator sealing forms a high pressure generator chunk;

Above-mentioned high pressure generator includes electric capacity, transistor, pickup coil and resistance;

On above-mentioned spark plug and the high pressure generator installation substrate in the enclosure, the shell internal electric source, power switch is installed on the shell.

Characteristics such as spark plug pick-up unit of the present utility model has compact conformation, volume is little, easy to carry and safe and reliable are vehicle repair plant, accessory commodity, and the automobilist is used for the ideal tools of easy screening spark plug.

Followingly the utility model technology contents and structure are further described with reference to accompanying drawing:

Fig. 1 is a schematic diagram of the present utility model;

Fig. 2 is a kind of enforcement illustration of high pressure generator of the present utility model;

Fig. 4 is a kind of embodiment synoptic diagram of the present utility model;

Referring to Fig. 1 spark plug pick-up unit of the present utility model, include power supply 2, switch 1, spark plug adapter 4 and high pressure generator 3; Two of spark plug adapter 4 link to each other with the high voltage output stage of high pressure generator respectively.High pressure generator is a positive feedback transistor self-maintained circuit of utilizing transformer coil to be coupled to form, in strong positive feedback process, makes transistor enter state of saturation, produces rectangular voltage, induces high voltage in secondary coil.For this high pressure generator is reliablely and stablely worked in different environment, can protect its sealing and form a high pressure generator chunk.Switch 1 and the input end that is connected on high pressure generator 3 after power supply 2 is connected among Fig. 1, spark plug 4 is connected on the output terminal of high pressure generator 3.

Referring to Fig. 2, Fig. 2 is a kind of single tube DC converter circuit, C among the figure ₁Be shunt capacitance, C ₂For protection electric capacity, BG are that transistor, R are working ressitance, L ₁Be primary coil, L ₂Be tickler, L ₃Be the secondary high pressure coil, dotted line is represented capsul among the figure.High pressure generator 3 comprises capacitor C ₁, C ₂, transistor BG, coil L ₁, L ₂, L ₃Electric capacity L ₁By coil C ₁Link to each other capacitor C with base stage and the transmitter of transistor BG ₂The back wiring circle L that links to each other with the emitter of transistor BG and amplifying stage, resistance R is connected on coil L ₁With electric capacity L ₁Or coil L ₂Between.During use, the thing switch closure utilizes transformer coupled formation positive feedback, and resistance R makes transistor set up the working point, because L ₂Produce strong positive feedback, make transistor BG very piece enter exhausted and state generation rectangular voltage, and in the secondary high pressure coil, induce high voltage.Capacitor C ₁Make base circuit form loop or short circuit AB point, capacitor C for changing voltage ₂Main protective transistor BG effect when induced voltage is higher, the primary winding L of plaing ₁Generally select about the 0.1mm20 circle coil L for use ₂Select about 0.1mm and circle coil L for use ₃Select for use about the 0.1mm100000 circle, supply spark plug work by 10,000 volts of high pressure of output behind the transformer, to detect the quality of spark plug performance.

Referring to Fig. 3, spark plug adapter and high pressure generator in the spark plug pick-up unit of the present utility model can be installed on the base stage in the enclosure, and shell selects for use volume little, mounted configuration compactness cylindric, and base stage can be fixedly mounted on inner surface of outer cover; Spark plug adapter is for adapting to two seat rings of spark plug configuration, be fixedly mounted on the shell by insulating mat etc., also can be positioned on the base stage, power supply is housed in the enclosure, and power supply can be selected two joint 1.5V batteries for use, in order to dwindle its volume, also can adopt the little battery of other volume, power switch is selected pushbutton switch for use, or push-and-pull switch, is installed on the shell.Upper surface of outer cover has the spark plug jack, and the bottom has battery cover.These architectural features are known existing structure, so do not provide in detail in the accompanying drawing.

High pressure generator of the present utility model can adopt existing single tube d-c transformer, also can adopt two-tube d-c transformer, discloses the single tube d-c transformer among the figure.

Claims

1, a kind of spark plug pick-up unit includes power supply, switch, spark plug adapter, it is characterized in that: further include high pressure generator, two of spark plug adapter link to each other with the output stage of high pressure generator respectively; High pressure generator is the positive feedback transistor self-maintained circuit that the transformer coil coupling forms, and includes electric capacity, transistor, pickup coil and resistance.

2, spark plug pick-up unit according to claim 1 is characterized in that: the high pressure generator sealing forms a high pressure generator chunk.

3, spark plug pick-up unit according to claim 1 and 2 is characterized in that: on spark plug adapter and the high pressure generator installation substrate in the enclosure, and the shell internal electric source, power switch is installed on the shell.