Automatic temperature control heating device of diesel vehicle fuel system

Abstract

The invention discloses an automatic temperature control heating device of a diesel vehicle fuel system, belongs to the technical field of accessories of a motor vehicle fuel system, and solves automatic temperature control heating for fuel. Electric heaters which can independently and automatically control the temperature respectively and have automatic safety protection function are assembled at the corresponding parts of a fuel system; the heating device comprises a fuel pipe inner heater, a filter and an oil tank inner heater, wherein the fuel pipe inner heater consists of an electric heating wire L, a thermal fuse RD1 and a bimetallic temperature controller ZK1 which are connected in series together and form a whole through injection molding and packaging; and the filter and the oil tank inner heater form a whole through a heat-sensitive resistance heating sheet and the bimetallic temperature controller which are connected in series together. The heating device has the advantages that the heating device not only can solve the problems that a diesel vehicle is difficult to start and easy to shut down during running, but also can keep the temperature of the diesel supplied to an engine by the fuel system between 7 and 24 DEG C all the time, realizes year-round use of No.0 diesel oil, has high fuel heating speed, high efficiency and reliable safety protection function, can improve filter precision and reduce oil consumption and discharge, is convenient for a user to assemble and use the heaters for the fuel system parts as required in a single mode, a combined mode or a full system mode according to different vehicles and different seasons, and simultaneously is quite convenient to use.

Description

technical field [0001] The invention belongs to the technical field of matching devices for motor vehicle fuel systems, and relates to an automatic temperature control heating device for a diesel vehicle fuel system. Background technique [0002] For diesel vehicles, the use of No. 0 diesel oil is the most economical, but when the temperature of No. 0 diesel oil is lower than 4°C, it begins to decompose wax, and its fluidity decreases, which will cause blockage of the fuel pipeline system and the engine cannot work normally. Therefore, in winter, many No. 0 diesel oil cannot be used in some places, and most of them choose other low-grade diesel oil according to temperature changes, such as: -10, -20, -35 diesel. The market price is about 15% higher than that of 0 diesel. High-grade diesel oil is the hope of vehicle users; in addition, environmental regulations require diesel vehicles to meet Euro III and Euro IV emission standards. Diesel vehicles have successively adopted h...

AI Technical Summary

Problems solved by technology

[0002] For diesel vehicles, the use of No. 0 diesel oil is the most economical, but when the temperature of No. 0 diesel oil is lower than 4°C, it begins to decompose wax, and its fluidity decreases, which will cause blockage of the fuel pipeline system and the engine cannot work normally. Therefore, in winter, many No. 0 diesel oil cannot be used in some places, and most of them choose other low-grade diesel oil according to temperature changes, such as: -10, -20, -35 diesel. The market price is about 15% higher than that of 0 diesel. High-grade diesel oil is the hope of vehicle users; in addition, environmental regulations require diesel vehicles to meet Euro III and Euro IV emission standards. Diesel vehicles have successively adopted high-pressure common rail technology, and fuel must be preheated before entering the high-pressure chamber to facilitate combustion. , to reduce the emission of harmful substances; as far as ordinary diesel vehicles are concerned, when encountering severe cold and low temperature weather, sometimes the viscosity of diesel oil will increase and the flow will not be smooth, making it difficult to start the engine, or the vehicle will stall during operation; in the prior art, fuel oil The heating device in the system is far from meeting the requirements. First, it only considers the heating from the fuel tank to the fuel delivery pump, or only the heating of the fuel tank and a single filter, and does not consider the entire fuel system, especially from the fuel delivery pump to the high pressure. The heating between the oil pumps, and the 2-micron filter (fine filter) installed here is the place where the fuel system of the whole vehicle is most likely to be blocked. An additional supporting temperature sensor control circuit, such as the scheme disclosed in ZL200720190373.5, or adopting a PTC sheet as a heating element, and additionally supporting a CPK temperature control circuit formed by a microelectronic circuit, such as the scheme disclosed in the publication number CN1524723A, not only the circuit layout It is complicated, and each heating element lacks independence, and it is easy to cause chain problems. The most prominent is that there are obvious safety hazards, and there is no reliable safety protection. Third, the original car design must be changed when the heating device is equipped, especially the filter , fuel pipe, not only will cause the reliability and life of the parts of the fuel system to decline, but also it is difficult to ensure the fuel filter accuracy requirements of the vehicle fuel system

Therefore, there has been no diesel vehicle successfully launched on the market so far—especially an automatic temperature-controlled heating device for the entire fuel system.

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