1 automobile production process how to write into it.
2 how to write when converted into ECU
3 ECU repair time how to write into
4 program written in any language
5 Other
answer:
The complexity of the problem, the manufacturers generally have their own adapter, which is encrypted and computer interface means for reading and writing ecu and the sensor signal! In fact, one or several microcontroller to read and write.
SCM also known as micro-controller (Microcontroler), because it is the first to be used in the field of industrial control. Only by the microcontroller CPU chip dedicated processor evolved. The first design concept by a large number of peripherals and CPU in a single chip, making the computer system smaller, more easily integrated into complex and requires them to mention strict control equipment.
As the device is cost-sensitive, so now the dominant software or the lowest level assembly language, which is the lowest level in addition to the above binary machine code language, since so low why use it? Many high-level language has reached a level of visual programming Why not? The reason is very simple, it is not a home computer as single chip CPU, I did not like the hard disk as mass storage device. A visualization of small programs written in high-level language, even if there is only one button, will reach tens of K of size! For home PC hard disk in terms of nothing, but in terms of the microcontroller is not acceptable. SCM hardware resource utilization must be high for the job, so although the original assembler but still in heavy use. The same token, if the operating system and application software on supercomputers to get a home PC to run up, home PC also can not afford.
Various brands of ECU write interfaces and formats are not the same.
1.ECU basic is a single-chip, single-chip interface is written by the MCU ROM chip
2. The modified ECU also through this interface and computer link, data is written ECU
3. Repair and modification Similarly, just write the original data
4. Sedan different providers are not the same, mostly for C / C ++
5. professional modified ECU basically two kinds of methods
(1) write high-performance version of the original offer of ECU, which is more common in Volkswagen Queen Refurbisher, which Refurbisher factory to maintain good relations and to obtain first-hand data vendors, better engine efficiency after modification , basically no side effects.
(2) to bypass the original ECU, ECU set another configuration system, the only common in the pursuit of performance modifications, by sensing and control system wiring stripped from the original ECU, modified with direct access to the new ECU system can break the original many restrictions ECU, and maximize engine performance, but mostly this modification is accompanied by increased engine fuel consumption, stability decreased, shortened life expectancy of side effects.
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