Fluid dual-fuel intermediate-speed diesel system and speed regulation control method thereof

Abstract

The invention relates to the technical field of intermediate-speed diesels, in particular to a fluid dual-fuel intermediate-speed diesel system and a speed regulation control method thereof. The fluiddual-fuel intermediate-speed diesel system comprises a micro-computer, a diesel oil supply and control loop and a methyl alcohol supply and control loop, the micro-computer is connected with the diesel oil supply and control loop and the methyl alcohol supply and control loop separately, and the diesel oil supply and control loop and the methyl alcohol supply and control loop are independent of each other. According to the fluid dual-fuel intermediate-speed diesel system, methyl alcohol is adopted as a fluid fuel and can be stored and added at the normal temperature and normal pressure, the system is convenient to use, and leakage does not easily occur. The flash point of the methyl alcohol is about 10 DEG C and is far higher than that of gas fuel, and therefore the system is safer. The rotation speed and output power of an engine controlled through the speed regulation control method during work are stable, and the speed regulation process is stable.

Description

technical field [0001] The invention relates to a liquid dual-fuel medium-speed diesel engine, in particular to a liquid dual-fuel medium-speed diesel engine system and a speed regulation control method thereof. Background technique [0002] Diesel engine dual-fuel technology mainly revolves around combustible gas fuels, such as natural gas, liquefied petroleum gas, biogas, etc. [0003] The gas dual-fuel technology mainly has the following problems: [0004] 1. Low energy density and large storage space; [0005] 2. Pressurized transportation, storage and filling, high cost of use, and high risk of leakage; [0006] 3. In the event of leakage, it is easy to mix with air and explode after being ignited, which poses a safety hazard. [0007] The speed control of liquid dual-fuel diesel engines on small diesel engines usually adopts the control method of active throttle and follow-up throttle, that is, the driver directly controls the diesel throttle through the operating d...

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Problems solved by technology

[0004] 1. Low energy density and large storage space;

[0005] 2. Pressurized transportation, storage and filling, high cost of use, and high risk of leakage;

[0006] 3. Leakage is easy to mix with air and explode after ignition, posing safety hazards

[0008] In the field of medium-speed diesel engines with large bores, that is, larger than 250mm, dual-fuel diesel engines using flammable liquid fuels are relatively rare. Because medium-speed diesel engines with large bores work at a stable speed under the PID control of the governor, due to the large inertia of moving parts during the speed regulation process Slow, the system stabilizes for a long time, following the throttle will increase the speed regulation process, and the long speed regulation process will lead to unstable factors in the speed regulation

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