Fuel switching method and device of dual-fuel engine and electronic equipment
A dual-fuel engine and engine technology, applied to combustion engines, internal combustion piston engines, mechanical equipment, etc., can solve problems such as poor economy and large fluctuations in engine speed
Inactive Publication Date: 2019-04-16
ZHEJIANG GEELY NEW ENERGY COMML VEHICLES CO LTD +3
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[0004] In view of this, the object of the present invention is to provide a dual-fuel engine fuel switching method, device and electronic equipment to alleviate the technical problems of large fluctuations in the engine speed during fuel switching, and poor economic efficiency during startup and warm-up
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[0044] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. the embodiment. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0045]At present, in the process of switching from gasoline combustion to methanol combustion, the engine is likely to stall if the switch is too early, and the combustion of the engine is unstable; if the switch is too late, the starting time of the car will be long, and the start-up and warm-up process will be poor in economy. Based on this, a dual-fuel engine fuel switching method...
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The invention provides a fuel switching method and device of a dual-fuel engine and electronic equipment. The fuel switching method of the dual-fuel engine comprises the steps that the cooling liquidtemperature and air inlet temperature of the engine are obtained, and the rotating speed of the engine is detected in real time; a fuel switching starting moment is determined according to the coolingliquid temperature, the air inlet temperature and a comprehensive temperature limiting value to switch fuel of parts of air cylinders; and the fuel of all the air cylinders is switched according to the rotating speed of the engine. By comprehensively considering the two temperature and a relationship of the comprehensive temperature and the comprehensive temperature limiting value obtained basedon the two temperature, the opportunity of novel fuel starting ejection is determined, and fuel switch of the parts of the air cylinders is started; and rotating speed information of the engine is used as judgment data of all air cylinder fuel switch. According to the fuel switching method of the dual-fuel engine, under the condition of not changing engine hardware, a switching control strategy ismodified, and the economy of the preheating process is improved; and meanwhile, through the gradual type switching mode, the starting preheating time of the engine is controllable and shortened, andthe fluctuation of the rotating speed of the engine is effectively reduced.
Description
technical field [0001] The invention relates to the technical field of automobile engine control, in particular to a dual-fuel engine fuel switching method, device and electronic equipment. Background technique [0002] With the rapid development of the automobile industry and the sharp increase in the number of automobiles, the environmental pollution caused by automobiles and the oil crisis have become increasingly prominent, prompting people to look for clean energy that can replace petroleum. As an alternative fuel for vehicle engines, methanol can effectively alleviate this contradiction. Methanol / gasoline dual-purpose fuel engine has attracted people's attention because of its good emission performance, convenient modification and flexible use. The biggest problem of methanol engine is the difficulty of starting at low temperature. To solve this problem, gasoline is generally used as the fuel for the engine during starting and warm-up, and methanol is used as the engi...
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IPC IPC(8): F02D41/00F02D43/00F02D19/06
CPCF02D19/0613F02D19/0655F02D37/02F02D41/0025F02D41/008F02D2200/02F02D2200/0414F02D2200/101Y02T10/30
Inventor 周晓雪王洋段召政刘洪伟
Owner ZHEJIANG GEELY NEW ENERGY COMML VEHICLES CO LTD