ECU (Electronic Control Unit) the electronic control unit, also known as “trip computer”, “car computer” and the like. It is speaking from the vehicle for use of a microcomputer controller. It, like ordinary computer, a microprocessor (CPU), a memory (ROM ,, RAM), an input / output interface (I / O), analog to digital converter (A / D) and shaping, driving a large-scale integration circuit. With a simple phrase to describe that “ECU is the car’s brain.”
1.ECU the noun
ECU (Electronic Control Unit) the electronic control unit, also known as “trip computer”, “car computer” and the like. It is speaking from the vehicle for use of a microcomputer controller. It, like ordinary computer, a microprocessor (CPU), a memory (ROM ,, RAM), an input / output interface (I / O), analog to digital converter (A / D) and shaping, driving a large-scale integration circuit. With a simple phrase to describe that “ECU is the car’s brain.”
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2.ECU the
function
of the electronic control unit is an air flow meter and the information inputted from various sensors according to its operational program and data memory, processing, determination, then output command, provide a width of the electrical pulse signal to the injector to control the fuel injection amount. The electronic control unit of a microcomputer, an input, an output and a control circuit.
Self-diagnostic function
3.ECU the
Usually the ECU and are provided with self-diagnostic fault protection function, when the system failure, it can automatically record the fault code in the RAM and the use of protective measures read from the alternative procedures inherent in the program to maintain the operation of the engine. Meanwhile These error messages will be displayed on the dashboard and remain immortal, so that owners can discover problems and able to open the car repair shop.
4.ECU self-fit function
Under normal circumstances, RAM will keep your driving record data, becoming ECU learning program that provides the best control to adapt to your driving habits state, the program is also called adaptive program. However, because it is stored in the RAM, the same code as an error, but to remove a battery loses power, all data will be lost.
5.ECU network Comments
at present in a number of high-class cars, not only in the application engine ECU, ECU can find traces in many other places. For example, anti-lock braking system, four-wheel drive system, electronically controlled automatic transmission, active suspension systems, air bag system, the multi-adjustable electric seat so arranged the respective ECU. With the improvement of car electronic automation, ECU will be increasing, the line will become increasingly complex.To simplify the circuit and reduce costs, the vehicle information transfer between the plurality of ECU will use a technique called multiplexing communication network, the vehicle ECU to form a network system, i.e. CAN data bus.
6.ECU modification
ECU modification, that deal with the problem by changing the (pre-set program good ECU) to achieve the purpose of changing the engine operation. So-called “ECU program” is actually a set of algorithms, it is stored within the reservoir, the signals from the controller via the input device transformed from the process generates a corresponding command signal, transmitted out from the output device. So, we modify ECU parameter for the fact that the modified algorithm.
7.ECU modified embodiment
This is converted into three kinds ECUThe way. ECU converted just a general statement, which of them can be divided into direct conversion and change internal procedures to change the modified ECU calculator hardware. “Deception” There are three main ways.
● Alternatively formula
directly change ECU computing hardware is our very common “replaceable Computer” Speedway, with “full replaceable ECU” controls the engine, e.g. Motec, Haltech brands, is known more fully substituted computers, which are typically modified with severe hardware engine retrofitting, since the modification of the engine operating temperature, the intake air amount, the fuel injection quantity, the data compression ratio is greatly beyond the original when the set range, that is to say after the engine after a very large refit work, original ECU completely unable to meet the needs of hardware, such competitive products is the most appropriate choice.
Alternatively computers completely without taking into account the limitations of the original data, all the data allow technicians arbitrarily set. Although the replacement computers has a very powerful adjustability, but also because this computer has no fixed form and size, everything you need to start from scratch. So that the requirements of the technician is very high. As for how difficult, let alone a vehicle boot normally idle stabilization, a day or two to adjust the time is also not surprising, so that regardless of the cost to replace computers used for professional teams.
● write formula
and the write-modified ECU ECU retains the original hardware part, the method of the operation control program writes the new ECU program, due to changes in the original setting program, also known as write-ECU ECU rewritten or folk often say brush computer. This approach, while subject to modification original ECU and sensor limit, the adjustable range is relatively small, but does not destroy the original use of other features as well as a more stable and secure features, in recent years has been modified more players of all ages .
Many brand will launch ECU program corresponding to the specific model, some of the more popular write-ECU converted to publicize its brand is set ECU program for local oil, climate and other factors, may also choose enhanced low torque, peak horsepower is increased even more fuel-efficient model than the original ECU modification program.
●-cell
modified plug-in the ECU, the signal simply is by “sneak” replacement procedures with protective spoofingThe ECU to achieve the purpose of changing the execution of the program. First, plug the ECU various sensors is fed back to the ECU signal intercept, modified for the signal to be adjusted (can be understood as cheating, aims to deceive the original ECU), would have been recognized over the original signal becomes the upper limit of ECU normal ECU original input signal, ECU after receiving a “good signal” factory setting execution program is output to the ECU plug, plug ECU time signal and then modified (in this case the original instruction given ECU is not adapted to perform element work).
After the series of operations, a successful deception may be considered completed. Plug-modified ECU adjustable range between the other two methods. However, due to the performance of Hyundai Motor ECU more and more powerful, higher degree of self-protection, plug-in computer operation has become increasingly difficult.
In general, three methods each have their own advantages and disadvantages, an alternative formula for conversion even severe competitive modification, writing brush original formula for mild and strong protective ECU modification, the PC plug-in for mild to moderate conversion, and the corresponding original data more easily modified ECU.