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Abstract. This report presents a detailed explanation of the Design requirements of Electronic control Unit (ECU) for Engine Management. Due to the regulations demanding lower emissions, together with the need for better performance, fuel economy, continuous diagnosis, Electronic systems form an inevitable part of Engine management.
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- Design and construction
- Data processing
- Microcontroller
- Program and data memory
- ROM
- EPROM
- Flash-EPROM (FEPROM)
- Variable-data or main memory
- RAM
- ASIC
- Monitoring module
- Switching signals
The pcb (printed-circuit board) with the elec-tronic components (Fig. 1) is installed in a metal case, and connected to the sensors, ac-tuators, and power supply through a multi-pole plug-in connector (4). The high-power driver stages (6) for the direct triggering of the actuators are integrated in the ECU case in such a manner that excellent heat ...
Input signals In their role as peripheral components, the actuators and the sensors represent the inter-face between the vehicle and the ECU in its role as the processing unit. The electrical signals from the sensors travel through the wiring harness and the plug to reach the control unit. These signals can be of the following type:
The microcontroller is the ECU’s central component (Fig. 2) and controls its operative sequence. Apart from the CPU (Central Pro- cessing Unit), the microcontroller contains not only the input and output channels, but also timer units, RAMs, ROMs, serial inter-faces, and further peripheral assemblies, all of which are integrated on a single microch...
In order to carry out the computations, the microcontroller needs a program – the “soft-ware”. This is in the form of binary numerical values arranged in data records and stored in a program memory. These binary values are accessed by the CPU which interprets them as commands which it implements one after the other (refer also to the Chapter “Elect...
Program memories can be in the form of a ROM (Read Only Memory). This is a memory whose contents have been defined permanently during manufacture and there-after remain unalterable. The ROM installed in the microcontroller only has a restricted memory capacity, which means that an addi-tional ROM is required in case of compli-cated applications. 2 ...
RAM A/D converter CAN ECU EEPROM EPROM The data on an EPROM (Erasable Program- mable ROM) can be erased by subjecting the device to UV light. Fresh data can then be entered using a programming unit. The EPROM is usually in the form of a separate component, and is accessed by the CPU through the Address/Data-Bus.
The Flash-EPROM is electrically erasable so that it becomes possible to reprogram the ECU in the service workshops without having to open it. In the process, the ECU is con-nected to the reprogramming unit through a serial interface. If the microcontroller is also equipped with a ROM, this contains the programming rou-tines for the Flash programmin...
Such a read/write memory is needed in order to store variable data (variables), such as, for example, arithmetic values and signal values.
Instantaneous values are stored in the RAM (Random Access Memory) read/write mem-ory. If complex applications are involved, the memory capacity of the RAM incorporated in the microcontroller is insufficient so that an additional RAM module becomes neces-sary. It is connected to the ECU through the Address/Data-Bus. When the ECU is switched off by t...
The ever-increasing complexity of ECU func-tions means that the computing powers of the standard microcontrollers available on the market no longer suffice. The solution here is to use so-called ASIC modules (Appli-cation Specific Integrated Circuit). These ICs (Integrated Circuits) are designed and pro-duced in accordance with data from the ECU de...
The ECU is provided with a monitoring module. Using a “Question and Answer” cy-cle, the microcontroller and the monitoring module supervise each other, and as soon as a fault is detected one of them triggers appro-priate back-up functions independent of the other. Output signals With its output signals, the microcontroller triggers driver stages wh...
These are used to switch the actuators on and off (for instance, for the engine fan).
- Felix Landhäußer, Michael Heinzelmann, Andreas Michalske, Mikel Lorente Susaeta, Martin Grosser, Joh...
- 2014
WCA/NFC WirelesschargingstationwithcontrolelectronicsforNearField Communication ZGM CentralGatewayModule 1 Start-upnodecontrolunitsforstartingandsynchronizingtheFlexRaybus system 2 Controlunitsauthorizedtoperformwake-upfunction
num ) flywheel a unit like the 60 Series unit can work since it can operate from the generator voltage output. If you don’t have much space and only can have a single switch and a lamp for the operators station the 60 Series works well also. Cost is lower on this unit normally since it has the no LED op-tion. 90 Series… 9988N,9988L,9910,9915
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Back then, the first Automotive ECU was built to control the engine. It was called the Engine Control Unit. to deploy an ECU (Control Unit) in a vehicle. Volkswagen, as many would guess, was the first OEM Fast forward to 201 9, Electronic Control Modules now control almost every aspect of a vehicle; viz; Engine, Transmission, Braking, Body ...
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The electronic control unit (ECU) is based on one or two microcontrollers. They consist of: • Microprocessor. It contains the central processing unit (CPU) and has an own control unit for the execution of instructions from the program memory, and a logic unit (ALU) to handle arithmetic and logic operations. The CPU performs
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What is electronic control unit (ECU)?
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Monitoring module The ECU is provided with a monitoring module. Using a “Question and Answer” cycle, the microcontroller and the monitoring module supervise each other, and as soon as a fault is detected one of them triggers appropriate back-up functions independent of the other. Electronic control unit (ECU) Data processing 257
