The calorific value of the spark plug, what is the calorific value of the spark plug

Spark plugs play a vital role as the end component of the engine ignition system. The calorific value of the spark plug refers to an index of the heating and heat dissipation capacity of the spark plug, and the amount of heat emitted by itself is called the calorific value.

The calorific value of the spark plug includes nine numbers of 1 9, of which 1--3 is the low calorific value, 4--6 is the medium calorific value, and 7--9 is the high calorific value. The calorific value of the original spare parts spark plug is generally three, which can dissipate a large amount of heat is called cold spark plug, that is, high calorific value spark plug, cold spark plug (high calorific value) The insulator skirt is relatively short, because the heat dissipation path is relatively short, and the heat dissipation is relatively more, so it is not easy to cause the temperature of the central electrode to rise. The relatively small heat dissipation is called a thermal spark plug, that is, a spark plug with a low calorific value.

The insulator skirt of the thermal spark plug (low calorific value) is longer, and when the temperature in the cylinder is evenly arranged, the longer the skirt, the larger the heating area, and the longer the distance of heat conduction, so there is less heat dissipation and the temperature rise of the center electrode is higher. Generally speaking, spark plugs with low calorific value are more suitable for low-power engines with low speed and low compression ratio, while spark plugs with high calorific value are suitable for high-power engines with high speed and high compression ratio. The higher this value, the more "cold" it is, and the smaller this value, the smaller the heat dissipation of the spark plug, and the more "hot" it is, depending on the mixing temperature in the cylinder and the design of the spark plug.

Whether a spark plug belongs to the "cold type" or "hot type" directly determines its own heat dissipation capacity, that is, the original calorific value of the spark plug directly determines its working environment temperature.

The working environment temperature requirements for the spark plug are very high, the heat dissipation of the spark plug can neither be too large nor too small, to ensure the working temperature of the spark plug, it must match the original calorific value. Under normal circumstances, the upper and lower drop is controlled within 1, if the drop is too large, it will affect the power output of the engine, and the spark plug will be damaged, and then the engine will be damaged.

Many people know that the calorific value of the spark plug cannot be lower than the original calorific value when replacing the spark plug, but they think that it is not a big problem to be higher than the original calorific value, but this is also wrong. When replacing the spark plug, do not pursue the spark plug with high calorific value too much, and should refer to the key factor of the original calorific value to match, otherwise it is easy to have a great impact on the engine performance.

After the last dare to ask and answer column, Brother Yin received many questions from fans one after another. In this issue of daring to ask and answer, Brother Yin mainly wants to explain to you some popular science issues related to car use, let's take a look.

The calorific value of the spark plug represents the speed at which the spark plug dissipates heat. The calorific value of a spark plug actually refers to the ability of a spark plug to dissipate heat after it has been heated. The calorific value includes a number, which is low calorific value, medium calorific value, and high calorific value.

The larger the number, the faster the heat dissipation (or colder the spark plug), and different engines require different spark plugs, which must be correct. ‎1‎3‎7--‎9‎1‎０‎0‎0--‎

6 7-- 1 Under normal circumstances, the speed of the car is high, the cylinder compression ratio is high, and the spark plug with high calorific value (fast heat) needs to be used, and the spark plug with low calorific value (slow heat) is generally used for large cars.

The calorific value of a spark plug actually refers to an index of its heating and heat dissipation capacity, and the amount of heat it receives is called the calorific value. The calorific value includes nine numbers of 1 9, of which 1--3 is the low calorific value, 4--6 is the medium calorific value, and 7--9 is the high calorific value. The higher the number, the cooler the spark plug is, and the better the heat dissipation, and it is most reasonable to find the calorific value that meets the overall situation of the car engine when replacing the spark plug.

The calorific value of a spark plug actually refers to an indicator of its ability to receive heat and dissipate heat, and the amount of heat it dissipates is called the calorific value. The calorific value includes nine numbers of 1 9, and its 1--3 is the low calorific value, 4--6 is the medium calorific value, and 7--9 is the high calorific value of the base space. The higher the number, the cooler the spark plug is, and the better the heat dissipation, and it is most reasonable to find the calorific value that meets the overall situation of the car engine when replacing the spark plug.

1.The calorific value is expressed as a number. Generally, the number in the middle of the model is the calorific value, and the unit is different for different manufacturers.

Different brands have different calorific value, and each brand has a model corresponding to the mold core, which is applicable. For example, the calorific value of ldhrik16 is 6, and the calorific value of ldhrikl is 7.

2.In fact, the heat generation of a spark plug is an indicator of its ability to generate heat and dissipate heat, and the heat emitted by it itself is called heat generation. It includes 9 calorific values from 1 to 9, where 1-3 is a low calorific value, 4-6 is a medium calorific value, and 7-9 is a high calorific value.

3.Cold spark plugs: The original spare spark plugs generally have three calorific values. A cold spark plug that can release a large amount of heat is called a high-heat spark plug.

The insulator skirt of the type cold spark plug (high calorific value) is short, the heat dissipation path is short, and the heat dissipation ratio is large, which is not easy to cause the temperature rise of the central electrode. Those with relatively small heat dissipation are called spark plugs, that is, spark plugs with low calorific value.

1.The calorific value of the spark plug reflects the ability of the spark plug to transfer heat from the combustion chamber to the cylinder head.

2.In the standard of spark plugs, the calorific value is often used to characterize the thermal characteristics of the spark plug.

3.The heat generation of the spark plug is not the same as the ability of the spark plug insulated skirt to balance heat absorption and heat dissipation.

4.The higher the calorific value, the higher the balance of heat absorption and heat dissipation.

5.Engines with high power and high compression ratios typically use cold spark plugs with high calorific value; Conversely, low-power, low-compression engines use low-calorific value sparks.

6.Normally, the selection of spark plugs is determined by the factory through product type testing and should not be replaced at will.

7.The selection of spark plugs can determine the heat generation according to the compression ratio, rotational speed, and air-fuel ratio of the engine.

8.The main requirements for spark plugs are thermal characteristics, tensile strength, heat resistance, and electrical conductivity.

9.The spark plug must be heat-resistant, and the temperature of the spiral part placed at the temperature to be heated is 700 within 10 minutes in a crucible electric or muffle furnace.

Spark plugs play a vital role as a key component of an engine's ignition system. Without a spark plug, the mixture cannot ignite and the engine cannot run. Therefore, the performance of the spark plug has a direct impact on the operation of the engine.

Spark plugs are also one of the consumables and need to be replaced regularly. When we replace the spark plug, many people only pay attention to the material or number of poles of the spark plug, and few people pay attention to the estimation of the heat generation of the spark plug. Many people know that when replacing the spark plug, the heat of the spark plug cannot be lower than the original heat, but they think that higher than the original heat is not a big problem.

Actually, this is also not true. Let's discuss the calorific value of a spark plug. The heat value of the spark plug refers to an indicator of heat generation and heat dissipation ability, and the heat emitted by itself is called heat generation.

The calorific value is expressed as a number and includes 9 numbers from 1 to 9, where 1-3 is a low calorific value, 4-6 is a medium calorific value, and 7-9 is a high calorific value. Different brands of spark plugs generate different heat, and each brand will have its corresponding model, which is applicable. For example, the calorific value of ldhrik16 is 6 and the calorific value of ldhrikl is 7.

The number of potato in the middle of the general model is calorific, and the unit of different manufacturers is also different. For the calorific value of the spark plug, we need to choose according to different engines. Generally, the calorific value of the standby spark plug is called a cold spark plug that can dissipate a large amount of heat, that is, a spark plug with a high calorific value.

The capacity of the spark plug is comparatively smaller, i.e., the spark plug with a low calorific value. The spark plug operates at a high ambient temperature, so its heat dissipation cannot be too large or too small. In order to guarantee the operating temperature of the spark plug, it must match the original calorific value.

Under normal circumstances, the difference between the top and bottom should be controlled within one. If the drop is too large, it will affect the power output of the engine, and at worst, it will cause damage to the spark plug, which will damage the engine. Therefore, when we replace the spark plug, we must pay attention to whether its heat generation is the same as that of the original spark plug.

If the wrong method is used to change the heat generation of different spark plugs, it can have a big impact on the performance of the engine. The spark plug must be replaced with the same calorific value as the original spark plug.