Biodiesel injection preheating high-pressure common rail injection system

Abstract

The invention relates to a biodiesel injection preheating high-pressure common rail injection system. The biodiesel injection preheating high-pressure common rail injection system comprises an oil tank filled with biodiesel, a filter, a preheating device, a high-pressure oil pump, a common rail pipe, an oil injector and a preheating device control module; the oil tank, the filter, the preheating device, the high-pressure oil pump, the common rail pipe and the oil injector are connected in sequence; the preheating device control module is connected with the preheating device; the biodiesel is output from the oil tank, is input in the preheating device after passing through the filter, is heated to within a set threshold by the preheating device, is output to the high-pressure oil pump by the preheating device for heating, and flows through the common rail pipe to be injected through the oil injector. Compared with the prior art, the biodiesel injection preheating high-pressure common rail injection system has the advantages that the biodiesel spraying combustion quality is improved, particles and carbon deposition are reduced and the biodiesel injection preheating high-pressure common rail injection system is good in compatibility.

Description

technical field [0001] The invention relates to the technical field of engine biodiesel injection, in particular to a preheating high-pressure common rail injection system for biodiesel injection. Background technique [0002] Due to its high viscosity and high oxygen content compared with diesel, biodiesel is prone to carbon deposition in the actual combustion process, and NO x A series of pollutant discharge problems such as rising. The root of this problem is caused by the oil film attached to the cylinder wall and the piston wall of the poorly atomized part of the biodiesel during the combustion process in the cylinder. [0003] In the actual working process of the diesel engine, the temperature after the compression is terminated can reach above 700-800K, while the injection outlet temperature of the biodiesel through the high-pressure common rail system (about 100MPa) is generally 40-60°C. Due to the high rate of biodiesel spray at this temperature due to the high fu...

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Problems solved by technology

[0006] The above-mentioned existing patents are different from the high-pressure common rail system commonly used by diesel engines, and there are performance incompatibilities. In view of the characteristics of biodiesel alternative fuels, the above heating methods cannot directly change the soot and carbon deposits after combustion. Bad emission situation, also can't improve spray combustion quality at the same time

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