Device and marking of spark plugs: overview, models, manufacturers and reviews

Spark plug – an important component that defines the operation of the internal combustion engine. It depends on the timely start of the engine, the stability at idle, power, economy and throttle response of the car. The candles work in extreme conditions. Periodically they require replacement. Let's find out how these details and consider how to interpret the marks of the spark plugs.

How it works

The Part consists of the housing part, the contact rod, electrodes and insulator of ceramic materials. Also, the device has a special ceramic insulator. The casing is threaded. The element installed in the holes in the cylinder head. These holes are called the candle wells. The housing is equipped with a special hexagon for the standard candle key. Also, the element is a special Nickel plated. It protects the candle from corrosion. Below in detail the structure and marks of the spark plugs.

Reference plane

The housing of the plug has a special reference plane. It helps to seal the hole. Different types of candles used are flat and conical bearing. In the first case, additional sealing is used a special o-ring. The conical surface is in itself good seals the connection part and the cylinder head.

Insulator

These elements are candles made from a special highly durable ceramic materials. On the surface of the insulating part has a special groove. They protect the item against leakage of electricity. One of the parts of this element have a conical shape. The so-called thermal cone.

Electrodes

If you cut the candle, you can see the center electrode and the contact rod. These elements are made of special high temperature-resistant alloys. Material for the Central electrode are two species of metals. So, the Central part is made of copper alloy. Then she is wrapped to withstand high temperatures. In the new candlelight is a special resistor. He needed to suppress electromagnetic interference. In the articles the old model of this element no. Therefore, when the engine is in the engine compartment you can hear the characteristic crackle.

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Features

Candles have different properties. Each model is prepared for certain types of modern internal combustion engines. The main characteristics of the candles is encrypted in the callout. Below will be considered marks of the spark plugs.

Dimensions

The Candle wells in motors are different sizes. Hence the different diameters. Candle size – its diameter, parameters, thread, length and size of the part under the key.

Surface number

Marks of the spark plug contains a heat rating, which can be decrypted and read. It represents the thermal performance and properties of the element. The candle, whose surface ignition a little, call hot. The thermal cone of this element can heat up to 900 degrees with relatively light loads. These elements are mounted on slaboprotochnyh motors where the compression ratio is low. There is also a cold spark plug. Labeling them different and depends on the manufacturer abroad, in contrast to domestic producers, no scales glow numbers. “Cold” elements are used on high-powered engines. And pre-ignition occurs under high thermal loads. While the taper candle will not be heated to 400 degrees, it is formed Nagar. It leads to the leakage current. This significantly disrupted the process of formation of the spark. At temperatures close to 400 degrees, the soot is combusted. This is a normal phenomenon. Thus, the candle is self-cleaning. Domestic manufacturers produce items that glow in the number of which is equal – 8, 11, 14, 17, 20, 23 and 26. If the vehicle is set too “cool” candles, they will not self-clean. As a result, the engine becomes unstable. If candle is overly “hot”, there is a risk of surface, that is, spontaneous ignition. The symptoms of this phenomenon resemble a detonation. The size of the spark gap is specified in the instruction manual of the car. Is this parameter in the range of 0.5-2 mm. marks of the spark plugs includes the size itself, it can be read on the packaging. Depending on what design of the electrodes on a particular candle, the gap can be adjusted. For some it can be unregulated.

Marking of domestic products

The products manufactured by the Russian manufacturer, be sure to specify the following information. This is the date when the item was installed – indicate the month or the last two digits, which you can read the year. Also indicate a trademark or the name of the manufacturer. Designated plug type (indicates that the candle is made in Russia). Also applymarking where you can read the main characteristics of the product. We'll talk about it in more detail.

Transcript of Russian candles

We will be considered marks of the spark plugs for Mercedes. All of them are made by Russian enterprises. Let's unpack it – A-У17 DRM 10:

• The First letter refers to the thread or its parameters. This marking indicates the letter “A” that corresponds to the M14 thread with a pitch of 1.25. It also may be referred to differently – “M”. this corresponds to the M18 thread with a pitch of 1.5.
• Next, you specify the design features of the product. In our case, “Have” suggests that the hexagon turnkey reduced. Also the manufacturer specifies the letter “M”. This suggests that the candle is small.
• Figure “17” in the marking – heat rating. It can be anything. In this case it's a hot candle.
• The Letter “D” denotes the length of the thread. She may be 12, 19 and 17.5 mm. Then marking tells of the cone. He may be acting or with no protrusions. In the latter case, “In” in the marking of reports that the cone of the speaker.
• Next “R” says the presence of the embedded resistor. It protects against various types of noise. In this case it is. “M” - this designation informs about the type of the Central electrode. It can be standard or copper core. And finally, “10” - the serial number.

Due to the fact that foreign manufacturers do not use a uniform system of marking for candles, to determine what the marks of the spark plugs to Bosch, only in the catalogs of the manufacturer.

Transcript labeling candles manufacturers

So, we have covered how to decrypt the products from domestic brands. But the problem is that Russian products have a short life. Therefore it is best to buy imported products. As evidenced by the reviews, the service life of such candles is higher.

NGK

Take, for example, NGK spark plugs.

Transcript labeling in fact, almost the same as in the case of domestic candles. The actual symbol – BCPR7ES-11. The first letter – the diameter of the thread, in our case it is equal to 14 mm. the Second number – candle key. In our case, the key size should be 16 mm. “P” suggests that the isolation of the speaker type. R indicates a resistor. 7 – heat rating. E – thread length. S – standard product. Finally, figure 11 – gap. In this case it is 1.1 mm.

Brisk

These candles are made in the Czech Republic. The company works with 35 years of the last century. Marks of the spark plugs Brisk – DOR15YC-1. Let's try to decode it:

• D – diameter, 19 mm, under the standard key "to 14”.
• Standard Thread with a pitch of 1.25 mm.
• “O” suggests that before us the special design.
• R – reports the presence of the resistor.
• Figure 15 – heat rating.
• Y – the discharger submitted type.
• “With” - core made of copper.
• “1” is the size of the gap 1 to 1.1 mm.

Now, we find out what spark plugs and how to decipher their labeling.