ECU generally use the versatile and functional integration, development easy CPU; software is generally written in C language, and provides a rich library of drivers and libraries that programming, simulation, simulation software, as well as for the calibration software.
Car computer repair is a very broad career prospects, as China entered the automobile society, more and more families or individuals to buy cars, which gives the car maintenance, especially senior automotive maintenance broader space.
In recent years, many new cars ECU can be repeatedly used to read and write Flash-Rom (flash memory) chip, when you modify the program without changing the blank chip can be loaded directly over the E-Rom more convenient. But regardless of what form of chips, and chip factory Refurbisher will be designed to prevent the added protection design is decoded and stolen copy, so when modified, first put the chip modified each car dealers upload the data to the chip Refurbisher to certification body number, ECU number, year / specifications. After the data determined under the relevant procedures before the dealer spread computer technician and then writes the data recorder or a blank chip used by the original factory testing computer connection socket, the Flash-Rom chip inside the ECU program update. This form of ECU modification method does not give the fans any room for adjustment, but the advantage is save time and worry, it is very suitable for those with no or only slightly altered engine (including the intake and exhaust system) of the original car.
It notes that most people have when it comes to ECU hardware with just stared, as if put on the car after a prestigious ECU will have an incentive to immediate performance increase, which is actually a big misunderstanding on the modification. ECU is just a tool, different categories and brand differentiation depends on your actual needs. After all, the skill of the programmer to look at the effect of the ECU and whether there is sufficient test equipment (such as professional use of air-fuel ratio meter, dynamometer, etc.). Just think, if the programmer only holding a laptop, sitting in the Fujia position and their owners on the highway side of the "Speed", while seat of your pants to adjust fuel supply and ignition timing, which is not only dangerous and not science, tune out the effect may be even worse than the original (of course, in the general level of modified street cars on this basic method is preferable). In the racing field, you often see engineers on-site with a laptop calibration procedure, which is converted in the original program according to the weather, track conditions fine-tuning the program, but does not deviate from the original modification program too much. In fact the biggest cost is not modified ECU in hardware but in software, to develop a fully tailored according to the individual circumstances of modified cars ECU program, you need an experienced programmer, together with other technical staff work all day on the dynamometer even longer. After all, if the calibration technology, however hard, or lack of professional equipment should be used in some well-known brands of chips or additional plug-in follows the random computer program, which may not be the best ECU modification, but it is definitely the safest and the most cost-effective way. Vehicles to adapt to a variety of weather, road conditions, the environment (such as high altitude, desert, cold and poor-quality gasoline and other harsh conditions) and the different requirements of various drivers, but it is also to ensure that such a complex situation with aplomb and still be able to through strict exhaust emissions, fuel economy standards, so in most cases, the original program ECU is a best compromise numerous conditions. In air-fuel ratio (AFR), for example, the original programmer must travel under certain circumstances (such as when driving at constant velocity) of AFR tune a little too dilute (ie, less gas and more oil) to reduce fuel consumption, in order to adopt a number of countries fuel consumption testing standards, while at other times in AFR Metropolitan factory ECU settings in 1: 14.7, because this is the easiest to qualify for proportional exhaust standards. But for most engines, the maximum power can be issued in the AFR is thicker mixture (ie, less oil and more gas) range. Also in order to broaden the car's fuel adaptability (different grades of fuel in different regions), the factory setting of the ignition timing can be adapted to the fuel generally lower label (engine output power at different ignition spark advance angle is not the same a), which means you now the engine ignition timing may not be with you now use labels with the best fuel ...... If you can modify the original program tend to look at aspects of dynamic performance, it would be able to increase horsepower 5-8% (turbo cars can even reach 15%), shift more smoothly! Many of the original can not solve problems such as: too easy to turn off idling, transmission shift vibration problems can be solved! And can fuel a 5% -25% if you really do not want to compromise, the best method is based on the individual requirements of the driver ECU upgrade program parameters: speed up the ECU more accurate calculations and computing speed, but because of cost and technical level of relations, some fans will be the next best thing for the car fitted with some of the commonly known as "secondary intake" or "additional fuel" and other accessories into the engine to increase the amount of fuel and air, these accessories are in fact the original sensor to bypass or sensor voltage to change the way of "deceit" ECU, it unwittingly into the air-fuel ratio changing values within the engine, so the engine has improved in certain conditions. But this incomplete conversion methods will bring other possible side effects and even security issues. So engine power performance under certain circumstances (conditions) has improved. There are a number of fuel saving products like paste, fuel economy, etc. are also exaggerated, but also the greatest fuel efficiency by 3%. If you want the power upgrade from simply go to a professional tuner is retrofitted ECU.
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