Automotive electronic control unit, referred to as electronic control units, automotive electronic control unit a control unit or integrated circuit, multiple control devices, etc., which is composed of an integrated circuit for implementing the analysis process of the transmission data series of functions the control means.
1. The structure of the electronic control unit
The electronic control unit comprises two main hardware and software, hardware mainly includes a system circuit, the drive circuit, input acquisition interface circuit.
1, system circuit: a system circuit to the selected microcontroller core, the main memory area expansion circuit, a clock circuit, reset circuit, a communication circuit or the like.
2, the drive circuit: the drive circuit is mainly the control signal from the CPU according to the requirements and the state of the engine operator calculated amplified to drive, to achieve control of the quantity control means and a timing control means.
3, an input interface circuit: an input interface collected from the sensor to the primary rotational speed, accelerator pedal position, engine coolant temperature and other signal amplification, shaping, voltage conversion, filter processing, etc., to ensure real-time accurateProvide a variety of engine parameters a CPU, if the CPU monitoring.
2. The effect of the electronic control unit
(1) and monitoring systems, real-time communication function.
(2) The system includes a self-diagnosis function, if a fault is detected, the backup function is enabled.
(3) receives the control information, the operator mainly refers to a variety of receiving control instructions, such as a throttle command.
acquisition and processing function (4) the system parameters, conditions and the application state parameter acquisition MCU rich interface resources of the engine, after the conversion to be processed.
(5) outputs a drive function, based on the control information obtained after treatment system, for amplifying a signal output, the drive quantity control means and a timing control means.
(6) under the control of the management software, the completion of various control functions, a condition determination parameter collection system according to realize the fuel injection amount control and injection timing control.