Anti-icing control method, device and system for natural gas engine mixer

Abstract

The invention provides an anti-icing control method, device and system for a natural gas engine mixer. The method comprises the following steps that operation parameters of an engine are obtained, andenergy factors matching with the rotating speed of the engine and the air inlet flow of the engine are obtained; an energy threshold value matching with the environment temperature of the engine is obtained; whether the energy factors are smaller than the energy threshold value or not is judged, if yes, timing is started, and when the energy factors are smaller than the time duration of the firstenergy threshold value and are larger than preset duration, and whether the environment temperature of the engine is smaller than a preset temperature value or not is judged; and when the environmenttemperature of the engine is smaller than the preset temperature value, a water drainage electromagnetic valve arranged in the mixer is controlled to be opened, and the problem that the engine cannotbe started and normally operates due to the fact that condensate water in the mixer freezes in extremely cold weather can be effectively solved.

Description

technical field [0001] The present invention relates to the technical field of engines, in particular to a method, device and system for anti-icing control of a natural gas engine mixer. Background technique [0002] The fuels used in natural gas engines are Liquefied Natural Gas (LNG) and Compressed Natural Gas (CNG). The main components of LNG and CNG are methane (CH4). Under cold conditions, such as below minus 15°C, when the engine runs under low load for a period of time, the water vapor entering the mixer through the Exhaust Gas Recirculation (EGR) system is cold due to the cold engine body running under low load. It will condense into water, and after the engine is turned off, it will freeze and block the mixer, resulting in unstable rotation speed after the engine is started, and no response when stepping on the accelerator. SUMMARY OF THE INVENTION [0003] In view of this, embodiments of the present invention provide an anti-icing control method, device and syst...

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Problems solved by technology

[0002] The fuels used by natural gas engines are Liquefied Natural Gas (LNG) and Compressed Natural Gas (CNG). The main components of LNG and CNG are methane (CH4). Under cold conditions, such as below minus 15°C, when the engine runs at low load for a period of time, because the engine body running at low load is relatively cold, the water vapor entering the mixer through the Exhaust Gas Recirculation (EGR) system It will condense into water, and after the engine is turned off, it will freeze and block the mixer, causing problems such as unstable engine speed after starting the engine, no response to the accelerator pedal, etc., and the engine cannot be started when the ice is severe

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