The engine management system is designed to perform a number of basic and additional functions.
The main functions of the system include injecting the right amount of fuel at the right time into the engine cylinders.
Additional functions include control of devices for limiting harmful emissions into the atmosphere, monitoring the condition of elements of the fuel and air supply system, as well as their control (turbocharger), and diagnostic functions.
In addition, the engine management system interacts with the transmission control system and the stability control system.
The engine management system consists of three main groups of components:
- sensors;
- electronic Control Unit (ECU);
- actuators.
The sensors send a set of signals to the control unit, reflecting the state of the mechanisms, environmental conditions, driver control actions, signals about the vehicle"s behavior on the road (etc.).
(The text of the article was taken from the website MitsubishiMan.ru)
The control unit, based on the program embedded in it, finds the optimal combination of output parameters for each of the possible combinations of input parameters. In this case, the change in parameter values occurs with a high frequency, which makes it possible to smoothly regulate the process. Data transmission and processing is performed in digital form. A multiplex data bus (CAN) is used to transmit data in digital form.
Actuators are a group of system elements that directly affect changes in process parameters (control valves, fuel injectors, throttle and bypass valves, servo drives, glow plugs, etc.).
More specifically, the composition, functions and structure of the system elements are described below.
