Control method, device and system of engine for power generation and system

Abstract

The invention relates to the technical field of internal combustion engines, and particularly discloses a control method of an engine for power generation. The method comprises the steps that according to a start signal, a high and low speed switching signal and a parallel operation rotating speed fine adjustment signal, a target rotating speed of the engine is calculated; the difference value between the target rotating speed of the engine and the actual rotating speed of the engine is subjected to PID calculation to obtain a final virtual accelerator opening degree; according to the final virtual accelerator opening degree and the actual rotating speed of the engine, the theoretical oil injection rate is obtained, and according to the actual rotating speed of the engine, external characteristic limit oil amount is obtained; the minimum value of the theoretical oil injection rate and the external characteristic limit oil amount is taken, and a final oil injection rate current value isobtained; and according to the final oil injection rate current value, engine speed adjusting control is carried out. The invention further discloses a control device and system of the engine for power generation. according to the control method of the engine for power generation, through a virtual accelerator, the oil injection rate is controlled, a mechanical accelerator pedal plate is omitted,the structure is simple, and use is convenient.

Description

technical field [0001] The present invention relates to the technical field of internal combustion engines, in particular to a control method for a power generating engine, a control device for a power generating engine and a control system for a power generating engine including the control device for a power generating engine. Background technique [0002] With the increasingly stringent emission regulations and the improvement of people's requirements for the use of engines, the electronically adjustable engines currently used in the field of power generation cannot meet the needs of the market due to their complex equipment, poor transient speed regulation performance and stability, and high fuel consumption. and higher demands from users. Therefore, it is a general trend to apply electronically controlled engines to the field of power generation. However, the existing electronically controlled fuel systems are mainly developed for vehicle engines. The change in speed is...

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Problems solved by technology

First, the Chinese patent "A high-pressure common rail diesel engine automatic electronic speed control device and method" (CN105888864B) discloses a high-pressure common rail diesel engine automatic electronic speed control device, which is based on the original high-pressure common rail system. A whole set of external control circuits such as PID regulation circuit, output processing and protection circuit, speed processing and conditioning circuit are added. Although the automatic speed regulation of the engine for power generation is realized, the structure is complicated, the cost is too high and the maintenance is inconvenient, so it has no application value

Second, the Chinese patent "Engine Control Method, Device and Power Generation Equipment for Power Generation" (CN103321767B) proposes a method and device for controlling an engine for power generation, which is obtained by PID calculation by obtaining the difference between the set engine speed and the actual engine speed Torque, and then converted from torque to fuel volume, so that the existing electronically controlled fuel system meets the power generation requirements, but it does not involve how to calculate the target speed of the engine under specific working conditions, how to use the speed difference to convert torque into torque at the same time In addition, the method of torque-to-oil quantity used is derived from the torque control strategy of vehicle engines, while the working conditions of engines for power generation are relatively simple, so there is no need for such complicated control methods

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