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This paper describes the causes of the spontaneous combustion of the wiring harness in the automobile circuit, analyzes the overload and short circuit, and puts forward the improvement method. The influence of the fuse position on the spontaneous combustion is introduced and the distribution scheme is put forward.
With the development of electronic technology, the number of electrical parts of the vehicle more and more, accounting for the proportion of vehicle parts is getting higher and higher, the role of more and more important. Vehicle circuit system design is facing greater challenges, the automobile market and network information are reported: because the vehicle circuit system design unreasonable or reliability can not meet customer requirements, resulting in vehicle circuit system damage to the problem, or even the vehicle Spontaneous combustion, fire and other serious consequences.
Therefore, it is very important to verify the design of the whole vehicle circuit system. In this paper, the causes of the spontaneous combustion of the wiring harness in the vehicle circuit system are analyzed, and the corrective measures are put forward through the test and verification.
Pre-new models of the development stage, the vehicle circuit system power distribution design and vehicle electrical balance test to verify the occurrence of spontaneous combustion of vehicles. Through the real vehicle or vehicle electrical platform directly measure the actual working state, so as to analyze the verification circuit system design rationality, reliability and integrity.
The main purpose of the vehicle circuit system is to verify the thermal performance of the electrical box and the fuse box to prevent the electrical system from being short-circuited, melted and burned due to the unstable thermal performance of the electrical box and fuse box. , The working condition of the fuse box under full load condition; verify the rationality of the power distribution design; verify the validity of the vehicle circuit protection.
Analysis of Spontaneous Combustion of Automobile Harness
1) overload overload refers to the line or component work load exceeds the rated value, resulting in electrical current is too large, power equipment fever. Long-term overload line will reduce the line insulation level, a short circuit or even burn equipment or lines.
2) short circuit is the current does not flow through the electrical directly connected by the wire (called closed circuit), the equivalent of direct connection to the power supply poles. Power short circuit when the circuit current is very large, so that the wire temperature, serious may cause spontaneous combustion.
3) fuse position and line matching affect the choice of fuse wire and wire diameter to match, the location should be reasonable layout, otherwise it will lose the proper circuit protection.
