Car ECU upgrade-programmable computer modification[汽车维修知识]

ECU--Electronic Control Unit--Electronic Control Unit. Denso Corporation of Japan is called ECU, Doctor of Germany is called EDU, Weifu Company is also called EDU, and it is also called Engine Control Unit. The basic function of ECU is that real-time working conditions and external working conditions always make the engine control in the best combustion state. ECU is widely used in various electronic control systems, such as: electronic control common rail system, ECS system, electronic governor, electronic control distribution pump, electronic control pump nozzle, etc. ECU calculates varioussensorThe information sent is processed, and each parameter is limited to the allowable voltage level, and then sent to the relevant actuators to perform various predetermined control functions.
The microprocessor calculates the fuel injection time, fuel injection volume, fuel injection rate and fuel injection timing based on the input data and the data stored in the MAP. And convert these parameters into time-varying electricity matching the engine operation. Since the work of the engine changes at a high speed, and requires high calculation accuracy and fast processing speed, the performance of ECU should be developed with the development of engine technology. The memory of the microprocessor is getting bigger and bigger, and the information processing ability is getting stronger and stronger. .
By engineRotating speed, Load-based, after ECU calculation and processing, send action instructions to fuel injectors, fuel supply pumps, etc., so that each cylinder has the most suitable fuel injection volume, fuel injection rate and fuel injection timing, to ensure that each cylinder performs the best Good burning.
The so-called computer by ordinary car users refers to the driving computer responsible for monitoring the condition of the vehicle and the engine, which is our so-called ECU. In the original factory state, the ECU supplies appropriate fuel and adjusts the ignition according to different driving conditions. In addition to the angle and timing, you must also be responsible for controlling various electronic equipment, such as air-conditioning systems,cooling systemAs well as self-detection systems, for vehicles, the ECU is equivalent to the human brain, which is responsible for receiving various signals, and after the built-in basic program is judged, it controls the various systems to maintain the normal driving of the vehicle.
Modification of ECU
The ECU mentioned above is an original part, and the internal program cannot be changed. Therefore, the so-called computer modification is to change the program in the ECU to achieve the goal of the engine power output. Generally speaking, there are many ways to modify the computer program. In the early days, almost all the original ECUs could only be removed and sent to major foreign refitting factories to adjust according to the refitting details. Later it evolved into a refitted chip, that is, the ROM that is responsible for the ignition or fuel supply program execution in the ECU. Replace with modified parts that have built-in modified programs. There are even software designed by the modification factory to crack the original ECU program. Adjustments can be made by uploading and downloading, but the performance improvement of these methods is very limited. Therefore, as early as the 1980s, European and American refitting factories had developed a plug-in programmable computer that can bridge the original ECU. The entire fuel supply program was completely re-calibrated, and the engine output was greatly improved. At present, the popular domestic refitting program is programmable. Computers began to be introduced into the country in about 1997.
Definition of programmable computer
At present, there are no less than a hundred types of computers on the market that claim to have adjustment functions. Some only have the function of adjusting the fuel supply, some can control the ignition timing, and some are variable.ValveControl, modified chip, modified ECU, etc., so it is necessary to clarify the definition of programmable computer.
The programmable computer we need to discuss here must be a plug-in type, adjusted in the way of Excel Map, can control fuel supply and ignition at the same time, can be adjusted at any time through special software, and has functions such as driving information recording. And it is the programmable computer to be discussed below that is not common in the domestic modification industry.
1. Parity jumper
1. The best choice for economical and practical use-GReddy e-Manage is fully functional and convenient for adjustment, downloadable adjustment software, economical and practical entry model
The e-Manage launched by GReddy is a common programmable computer in China with complete functions. The MAP is adjusted to a speed axis 16 grid * load axis 16 grid, a total of 256 grids, and the load axis has a variety of settings, including boosting. value,ThrottleVoltage (opening rate), ignition timing, etc., can be adjusted in various speed ranges according to different settings, and the price is cheap. The newly launched gold enhanced version, in addition to strengthening the original throttle opening rate. , Updates and adds the functions of Map of the instant fuel supply increment of the big foot throttle, AC acceleration correction, real-time display, and A/F air-fuel ratio recording. In the past, the problem of slow response speed, which was most criticized by users, has also been improved on the gold version of the model. Therefore, e-Manage is a must-have tuning tool for domestic modification shops and the best choice for entry modification fans.