Starting protective and logic controller

Abstract

The invention relates to a starting protective and logic controller, which comprises a main control chip, wherein a signal input end of the main control chip is respectively connected with output ends of an ST (system test) signal sampling circuit, a two-stage voltage stabilizing circuit and a D+ signal sampling circuit, the signal output end of the main control chip is connected with an engine through an output control circuit, the output end of the ST signal sampling circuit is respectively connected with the input ends of a delaying power-off protection circuit and the output control circuit, and the output end of the delaying power-off protection circuit is connected with the input end of the two-stage stabilizing circuit. According to the starting protective and logic controller, by the adoption of single chip control, an integration degree is high, and a hardware circuit is simple; by adopting two-stage stabilizing power supply for the single chip, the anti-interference capability is strong; by the adoption of the delaying power-off protection circuit, an interference getting rate of the single chip is small; an time interval is needed between two starts, and a starter is prevented from being damaged due to phenomena of tooth breaking and the like; after a successful start, the starter is automatically disconnected, and the tooth breaking is avoided caused by anti-dragging or ignition by mistake; and the starting protective and logic controller has the advantages of strong adaptability, high working reliability, long service life and the like.

Description

technical field [0001] The invention relates to the field of starting protection for diesel vehicles, in particular to a starting protection logic controller. Background technique [0002] The car starting system includes a starting switch, a starting relay, an electromagnetic switch and a starter, among which the starter plays an important role in the starting system of a diesel engine car. In recent years, according to statistics, the comprehensive failure rate of starters equipped with diesel engines in my country is about 1%. The failure analysis of a large number of starter failures shows that only a small part of the failures are actually caused by the quality of starters. Half of the starter failures are caused by improper use or failure to cut off the power in time after starting the car. At present, only a small part of diesel engine vehicles in our country have the function of starting protection, such as luxury buses, some high-end trucks and engineering vehicles,...

AI Technical Summary

Problems solved by technology

At present, only a small part of diesel engine vehicles in our country have the function of starting protection, such as luxury buses, some high-end trucks and engineering vehicles, while a large number of low-end trucks, engineering vehicles and agricultural vehicles do not have any starting protection measures. The ignition switches and relays for these vehicles are of poor quality due to their low prices, and are prone to sticking and stuck faults, and the faults are not easy to reproduce occasionally, so it is very difficult to prove

[0003] Due to the asymmetric matching relationship between parts manufacturers and OEMs in my country, parts manufacturers do not have much say in the handling of faults without sufficient proof of faults, so most of the fault claims are made by parts Manufacturers make compensation, and the annual claim amount is often as high as more than 5% of sales. The absolute number of fault claims for only one main supporting manufacturer of starters has reached tens of millions of yuan. The economic loss is huge and it also seriously affects quality indicators and market share.

The result of this loss is a great waste of social resources, because the starter that should have been used for several years burned down after only running for hundreds or thousands of kilometers.

In addition, there are safety issues. A large part of the annual car burning and spontaneous combustion accidents is related to the failure of the starter to cut off the power in time.

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