Low-height and high-reliability high-voltage wire for fuel gas and fabrication method of high-voltage wire

Abstract

The invention discloses a low-height and high-reliability high-voltage wire for a fuel gas and a fabrication method of the high-voltage wire. The low-height and high-reliability high-voltage wire comprises a wire body, an insulation outer skin and a spark plug connection sleeve head, wherein the spark plug connection sleeve head is sequentially provided with a heat conduction hard cylinder, a high-temperature resistant silica gel sleeve, an insulation layer and a cooling head sleeve from inside to outside, the high-temperature resistant silica gel sleeve comprises a bottom sleeve and a T-shaped heat conduction convex block, a plurality of T-shaped heat conduction convex blocks are distributed on an outer surface of the bottom sleeve, the bottom sleeve sleeves the heat conduction hard cylinder, the insulation layer covers the heat-temperature resistant silica gel sleeve, the cooling heat sleeve sleeves the insulation layer, and the insulation layer is pressed. The high-voltage wire hasthe advantages of high reliability, long service lifetime and the like, and low-cost fabrication can be achieved.

Description

technical field [0001] The invention relates to the technical field of high-voltage wires for gas engines, in particular to a low-height, high-reliability high-voltage wire for gas and a preparation method thereof. Background technique [0002] Due to the advantages of clean fuel, relatively cheap price, and high emission levels of gas engines, gas engines have gradually occupied a place in the entire commercial vehicle field and are increasingly popular with users. The structure and performance of high-voltage wires will directly affect the performance of the entire engine. At present, all automobile factories are pursuing compact layout, requiring the overall height of the engine to be reduced as much as possible, and at the same time, higher requirements are put forward for the B10 life of the engine. Compared with ordinary engines, gas engines have obvious differences in ignition. The compression ratio of gas engines is particularly high, and the voltage required for ig...

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Problems solved by technology

Compared with ordinary engines, gas engines have obvious differences in ignition. The compression ratio of gas engines is particularly high, and the voltage required for ignition is higher. At the same time, the temperature of gas engines is particularly high compared with ordinary engines. It is more demanding and requires high-voltage wires dedicated to gas engines to withstand higher voltages, better heat dissipation and anti-aging performance, and can effectively prevent high-voltage electrical flashovers. Most of the existing high-voltage wires are prone to aging due to high temperature and often appear Internal resistors are prone to aging or even ablation, and high-voltage electrical flashovers often occur. When designing for the above problems, the main reason is not that a good joint heat dissipation structure cannot be designed at the joints. The key is to design a good heat dissipation effect. At the same time, it can facilitate the processing of the current production process. The joint structure that is too complicated or not conducive to actual production will significantly increase the cost compared with conventional high-voltage wires. If it reaches 2 times or more than the cost of conventional high-voltage wires, the life of high-voltage wires will not double increase, there is basically no market at all, because consumers can choose through direct replacement. Therefore, it is a big problem to design and use current industrial capabilities to produce high-reliability high-voltage wires at low cost.

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