Automotive electronic control unit ECU Chengdu Panfeng Technology

Automobile electronic control unit Chengdu Panfeng Technology
Electronic control unit is the abbreviation of electronic control unit. The function of the electronic control unit is to calculate, process, and judge the information input by the air flow meter and various sensors based on the programs and data in its memory, and then output instructions to provide an electrical pulse signal of a certain width to the injector to control fuel injection. quantity. The electronic control unit is composed of a microcomputer, input, output and control circuits.
Definition
Electronic control unit, also known as driving computer, vehicle-mounted computer, etc. In terms of purpose, it is a car-specific microcomputer controller, also called a car-specific microcontroller. Like an ordinary microcontroller, it consists of a microprocessor, memory, input/output interface, analog-to-digital converter, and large-scale integrated circuits such as shaping and driving.
The voltage operating range is generally within (there is a voltage stabilizing device at key internal points), the operating current is at, and the operating temperature is below zero degrees. It can withstand the following vibrations, so the probability of damage is very small. It is the core part. It has the functions of calculation and control. When the engine is running, it collects the signals of each sensor, performs calculations, and converts the results of the calculations into control Signal controls the work of the controlled object. It also implements control of memory, input/output interfaces and other external circuits. The program stored in the memory is based on data obtained through precise calculations and a large number of experiments. This inherent program continuously communicates with the collected sensors when the engine is working. signals are compared and calculated. The comparison and calculation results are used to control the engine's ignition, air-fuel ratio, idle speed, exhaust gas recirculation and other parameters. It also has fault self-diagnosis and protection functions. When the system fails, it can also automatically record fault codes in the system and use protective measures to read alternative programs from the above-mentioned inherent programs to maintain the operation of the engine, so that the car can drive to Repair shop.
The working environment
The environment in which automobiles are used is very harsh and complex. In addition to environmental factors such as humidity, temperature, vibration, impact, dust, mud, water, oil, and fluctuating voltage, the electromagnetic environment is also an indispensable factor. Neglected problem. In order to adapt to the harsh electromagnetic environment in the car, it is very important to consider the environment and perform testing and evaluation when designing automotive electronic products.
Self-diagnosis function
Generally, it has fault self-diagnosis and protection functions. When the system fails, it can also automatically record the fault code in the system and use protective measures to read and replace it from the above-mentioned inherent program. procedures to keep the engine running. At the same time, these fault messages will be displayed on the dashboard and remain persistent, allowing car owners to discover problems in time and drive the car to a repair shop.
The self-adaptive function
Under normal circumstances, it will continuously record your driving data and become a learning program to provide the best control state to adapt to your driving habits. This program is also called Adaptive program. But since it is stored in the computer, just like the error code, once the battery is removed and the power supply is lost, all the data will be lost.
Network
At present, in some mid- to high-end cars, it is not only used in the engine, but can be found in many other places. For example, anti-lock braking systems, wheel drive systems, electronically controlled automatic transmissions, active suspension systems, airbag systems, multi-directional adjustable electronically controlled seats, etc. are all equipped with their own. As the electronic automation of cars increases, there will be more and more lines, and the lines will become increasingly complex. In order to simplify the circuit and reduce costs, information transmission between multiple vehicles must use a technology called multiplexed communication network to form a network system for the entire vehicle, that is, a data bus.