Spark plug from the central electrode, grounding electrode, the metal shell and an insulator composed of such. There are insulated spark plug ceramic insulator function, compared with the bottom metal shell, the shell there are threads used to lock up and close together within the cylinder to prevent gas leaking from the spark plug shell contains within it an elongated center electrode , in the bottom of the shell welding electrodes are grounded, usually center electrode and ground electrode between 0.7 ~ 1.3mm gap called the spark plug gap (Spark Plug Gap), high-voltage through the spark plug gap will produce current, Discharge spark to ignite gas mixture. Spark plug spark gap will be much stronger, but will be prone to high speed when the engine caught fire, while the gap is too small, then the sparks generated by more weak, and prone to short-circuit loss arising from the role of coke.

An ordinary one spark plug of the electrode material is made from nickel alloy, its need to check the time and the use of shorter periods of time, in addition to platinum, or iridium spark plug as an electrode material, the use of platinum and the spark plug in accordance with the efficiency and durability in the ignition all have better results, but the relative price is higher. Due to spark plug one end of the need to lock into the engine combustion chamber, must bear the combustion chamber when the inlet temperature and combustion temperature of this hot and cold for the rapid phase of the harsh working environment, so in order to cope with this harsh environment, so the materials used on the spark plug also very demanding requirements. Therefore, the use of nickel in general spark plug its melting point of about 1455 degrees, its price is cheaper so widely used, while the melting point of platinum is about 1770 degrees, its stability and resistance to ablation is better than nickel. In addition, the use of iridium spark plug as the material, Iridium melting point of about 2442 degrees, so more suitable for high-performance engine in a long time and high-speed use.

Spark Plugs In addition to the different materials, as well as into “cold type” and “hot type”, which is in accordance with the merits of thermal conductivity to distinguish between “cold type” spark plug insulators heat faster, “hot type” spark plug of the slower thermal insulator. General spark plug’s heat value is based on the figures to represent the spark plug, generally the greater the number the more heat, the smaller the number the more cold, but in comparison to the same model can only be compared, because some of the different models The spark plug of its calorific value represent the number of different ways. As the spark plug’s heat range can not be changed, so when you buy spark plug is best car models, as well as the usual custom to select the appropriate period of calorific value of Mars. If your car is naturally aspirated, or a low compression ratio of vehicle types, or you often in urban areas where traffic, you can select “hot type” spark plug, if your car is a Turbo or a high compression ratio of vehicle , or frequently driving on the highway, then the choice of “cold type” spark plug would be more appropriate.

In addition, the market there are still many claws spark plug, its multi-claw refers to the grounding electrode part with a single claw, Shuang Zhao, claw-or four-claw-type, this design is designed to allow the ignition when the spark discharge more evenly This mixture of oil and gas combustion efficiency will be better. In fact, even the choice a little better, good quality single claw spark plug, the effect is the same as superior.

An increasing number of vehicles, traffic is getting worse in car environment, the use of a vehicle automatic transmission system to open up and light, save trouble, is now almost the majority of consumers have been the first choice of car. However, although the convenience of automatic transmission easy to use, but because of automatic transmission system is a very sophisticated assembly, especially in modern times have similar features an automatic manual transmission whose structure is more complex. Therefore, once the automatic transmission failure, repair themselves, but is very cumbersome and expensive, the view of this, automatic transmission need to be more attentive care and maintenance can be turned on too long and smooth and not strike again.

In general, whether manual gearbox or automatic transmission, the proposed maximum of 12 months or 20,000 kilometers must be replaced on an automatic transmission oil (ATF-Automatic Transmission Fluid), Of course, some cars use the instructions written on 24 replaced once a month or 40,000 kilometers, this time with the best, together with the auto-oil-filter replacement. We all know that oil changes are the incumbent, clean, new oil, and the general replacement automatic transmission automatic transmission oil (ATF-Automatic Transmission Fluid) are mostly removed when the automatic transmission oil at the end of the screw to miss the old oils re – add new oil, but automatic transmission structure’s sake, some of the automatic gearbox oil will be left in the period, it can only be replaced by about 30% of the new oil, but there are 70% of the old oil still left in the gearbox inside, but if the purpose of breaking the oil-sump way, you can Da rate of 70% of the oil change.

While the above methods can not be Ta oil change to the rate of 100 percent of the oil change, but if the purpose of breaking way sump oil change, plus new ones Lu network (some models can not be replaced), so that in fact was already able to ensure speed boxes of health. Does not change automatically if long-term oil, for a long time down the automatic transmission is not a good thing, because the ATF oil will dirty transmission oil temperature is too high, the oil will reduce the impact of anti-wear effect of the life of components , while the dirty oil in the sludge will make the valve in the oil pipeline flow is not smooth, the oil will cause a serious obstruction, affecting for-Files feature. In the long-term high-temperature environment, the automatic transmission oil lubrication, if reduced, may cause the clutch wear and tear film, resulting in power can not be completely passed on to enable transmission of the response to slow, and even produce stall phenomenon.

So, if you want for the car’s automatic transmission replaced a lot of new ATF, then the automatic transmission oil circulation can be exchanged cleaning oil change the way automatic transmission cycle of cleaning can clear the gearbox oil change in the way of sludge to prevent the transmission oil temperature to enhance and help shift smoothly. However, there have been a lot of automatic transmission took place through the wash cycle, after the incident in question may be is due to the exchange of clean automatic transmission oil change the way recycling is a way to carry out high-pressure cleaning cycle, if the mishandling of the pressure too high may be harmful to the internal seal and clutch films and so on parts, if it is older vehicles are more likely to result in a higher gearbox. There are cycles of automatic fuel high demand for oil change may be more than 10 liters or more, it hurt their wallets, so if you’re a firm want to speed box for an automatic car wash cycle, then please check with your original or the letter had carried out maintenance plant technician and then, do not easily find what the factory warranty cleaning action, so as to avoid problems.

Do you have the Chevrolet Corvette? If yes, then it is the 2005-2007 models of the convertible models do? If your answer is yes, then you have to be careful, and you noticed in your band too slow given the abnormal sound roof do? According to GM and the National Highway Traffic Safety Administration survey, this is because part of the structure of the roof caused by loose, so this will lead to missing the roof while in motion the enormous security risk. Thus all the 22,090 vehicles 2005-2007 Chevrolet Corvette Convertible models will be sent to the local dealer to replace the proposed new roof, of course, is free of.

[Source: National Highway Traffic Safety Administration]