ecu is a computer control module.

ECU electronic control unit, also known as driving computer, vehicle computer, etc. Like an ordinary computer, it consists of a microcontroller (MCU), memory (ROM, RAM), input/output interface (I/O), analog-to-digital converter (A/D), and large-scale integrated circuits such as shaping and driving. composition.

ECU has fault self-diagnosis and protection functions. When the system fails, it can automatically record the fault code in the ram and use protective measures to read alternative programs from the above-mentioned inherent programs to maintain the operation of the engine. The function of the car ECU is to monitor various input data and various operating states of the car at any time, and calculate the information sent by various sensors according to pre-designed programs. After processing, each parameter is sent to each relevant actuator to execute various predetermined control functions.

ECU modification methods

1. Replacement type

Directly changing the ECU computer hardware is a very common replacement computer in racing circuits. Use full-time replacement ECU to control the engine, such as Motec, Haltech and other brands, which are the more famous full-time replacement computers. This kind of modification is usually used with severe engine hardware modification. Since the engine has undergone very large modifications, this competitive product is the most suitable choice.

2. Write-in type

The write-in modified ECU retains the original ECU hardware part and adopts the method of writing the new operation management program into the ECU program. Because the original factory setting program has been changed, the write-in ECU is also called rewriting the ECU or what is commonly known as flashing the computer. Although this modification method is limited by the original ECU and sensors and has a relatively small adjustment range, it is favored by more modification players because it does not destroy other functions of the original factory and is more stable and safer.

3. Plug-in type

Plug-in type ECU modification simply means replacing the signals. First, the plug-in ECU intercepts the signals fed back to the ECU by each sensor, modifies the signals that need to be adjusted, and turns the signals that originally exceed the upper limit approved by the original ECU into normal signals and inputs them into the original ECU. After receiving the normal signal, the ECU outputs the original factory-set execution program to the external ECU, and then the external ECU modifies the signal.

Reference for the above content: Baidu Encyclopedia—ECU