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　　DGU8800E Other names:

　　Control unit DGU8800E

　　DGU8800E input and output unit

　　Analog unit DGU8800E

　　DGU8800E is a digital speed control unit produced by KONGSBERG, which is part of the DGU8800E digital speed control system. The system is a fully digital speed control system controlled by a microcomputer. It not only has all the functions of a full-standard hydraulic speed governor, but also can meet all speed control tasks of low-speed long-stroke diesel engines. The DGU8800E digital speed control unit is located in the control console frame of the control room. It is responsible for receiving and processing various signals from the outside, and outputting corresponding control signals to adjust the speed of the main engine.

　　Working principle

　　The working principle of the DGU8800E digital speed control device is mainly based on the speed PID feedback control system and the throttle PI feedback positioning system. The speed control system compares the speed setting value with the speed measurement value, performs PID calculation on the deviation, and outputs the oil quantity control signal to the actuator. The actuator compares the received signal with the actual throttle opening signal, and outputs the throttle adjustment signal after calculating according to the PI law, so that the actuator positions the fuel rack of the high-pressure oil pump.

　　System composition

　　The DGU8800E digital speed control system mainly consists of the following parts:

　　Command device: located in the driving platform and the control room, used to issue speed setting instructions.

　　Power supply: Provides a stable power supply for the system, including the 220V three-phase AC power supply required by the three-phase servo motor and the 220V single-phase AC power supply required by the control circuit.

　　Digital speed control unit (DGU8800E): It includes two parts, the speed governor and the actuator. It is the core component of the system and is responsible for receiving instructions and controlling the position of the fuel actuator.

　　Speed detection device: It is used to detect the speed of the main engine and transmit the signal to the digital speed control unit. The device can be installed in front of the main engine flywheel or on the internal gear. It has two channels of dual redundant detection probes A and B to improve the reliability of measurement.

　　Scavenging pressure sensor: It converts the pressure in the main engine scavenging air main pipe into a current signal to limit the maximum injection amount at that time.

　　The working principle of the DGU8800E digital speed control unit is as follows:

　　Signal reception and processing: Various signals from external processes are connected to the standard terminal board through flat cables, and then converted into standard digital signals through their respective adapter cards and sent to the speed governor.

　　Speed control: The speed governor compares the speed setting value with the speed measurement value, performs PID calculation on the deviation, and then outputs the oil quantity control signal to the actuator.

　　Actuator adjustment: The actuator receives the throttle lever position command from the governor and the actual throttle opening signal from the throttle lever mechanism, calculates the deviation between the two according to the PI law, and outputs the throttle adjustment signal to enable the actuator to position the fuel rack of the high-pressure oil pump.

　　Main functions

　　The DGU8800E digital speed control device has multiple functions, including but not limited to:

　　The control function of the starting fuel supply setting value and the delay of cutting off the starting air after starting.

　　The governor parameter characteristic curve and its control function: including different control characteristics under normal sea conditions and severe sea conditions.

　　The acceleration rate limit function of the engine speed: prevent the main engine speed from rising too quickly.

　　Automatically avoid the critical speed zone control function: protect the main engine from damage.

　　The maximum engine speed limit function: ensure that the main engine speed does not exceed the set value.

　　The maximum fuel supply characteristic curve and limitation function corresponding to the scavenging air pressure: adjust the fuel supply according to the scavenging air pressure.

　　The maximum oil supply characteristic curve and limiting function corresponding to torque (speed): adjust the oil supply according to the main engine torque.

　　The filtering function of the display data value: improve the accuracy of data display.

　　The automatic calibration function of the servo device in the actuator: ensure the accuracy of the actuator.

　　Accurate speed control: DGU8800E can achieve accurate speed control to keep the main engine speed near the set value.

　　Multiple operation modes: The device supports multiple operation modes, including manual speed control and automatic speed control, to meet the needs of different occasions.

　　Automatic fault display and alarm: DGU8800E has automatic fault display and alarm function, which can detect and handle faults in time to ensure the stable operation of the system.

　　Communication with other systems: The device can communicate serially with the AC4 main engine remote control system and the SSU8810 security system, and respond to various signals sent by other systems in time.

　　In addition, the DGU8800E digital speed control device can also communicate serially with the AC4 host remote control system and the SSU8810 security system, respond to various signals sent by other systems in a timely manner, and realize automatic display and alarm of multiple operation modes and faults.

　　Applications

　　The DGU8800E KONGSBERG digital speed control device is widely used in various occasions that require precise speed control, such as ships, power stations, etc. In the field of ships, it is usually used in conjunction with the AC4 host remote control system and the SSU8810 security system to achieve precise speed regulation and safety protection of the host.

　　Product advantages

　　High reliability: DGU8800E adopts microcomputer full digital control, which has high reliability and stability.

　　Precise speed regulation: The device can achieve precise speed control to meet the needs of various complex working conditions.

　　Easy to maintain: The structure and function of the digital speed regulator are relatively simple, and it is easy to maintain and troubleshoot.

　　All products on this website are special products, and the market price has been fluctuating.

　　The specific quotation is subject to the customer service. Because the product is a new product, the price is not real.

　　Please confirm the model and product, price and other detailed information with the customer service before placing an order. The website has been used.

　　New ones are on sale, please contact customer service for communication.

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