Starter starting protection logic controller

Abstract

The invention discloses a starter starting protection logic controller comprising a single-chip computer, a delay power-off protection circuit, a two-level voltage stabilizing circuit, a clutch signal sampling circuit, a neutral signal sampling circuit, an output control circuit, a START signal sampling circuit and a D+ signal sampling circuit. The starter starting protecting logic controller has the advantages that anti-interference capacity is high; the rate of the single-chip computer being influenced is low through the use of the delay power-off protection circuit; a time interval is arranged between two starts, and a starter can be protected from damage by tooth breakage and other problems.

Description

technical field [0001] The invention relates to a starter protection logic controller used in the field of starting an automobile engine. Background technique [0002] The starting of the internal combustion engine is divided into two categories of electric starting and non-electric starting, and the present invention only discusses the problem of electric starting. According to authoritative statistical data, the comprehensive failure rate of starters equipped with automobile engines in my country is about 1%. The failure analysis of a large number of starter failures shows that only a small part is really caused by quality reasons, and more than half of the failures are caused by Burning caused by improper use or failure to cut off the power in time after starting the car. [0003] The car starting system includes a starting key switch, a starting relay, an electromagnetic switch and a starter, among which the starting relay, an electromagnetic switch and a starter play an...

AI Technical Summary

Problems solved by technology

But at present, there is no unified protection circuit for vehicle starting protection in our country, and a large number of low-end vehicles have not been considered at all. It is just that the starting circuit of these vehicles is relatively poor in quality, and the consequence is that the starter cannot work normally after starting. The power failure will quickly burn out and fail, and the proportion of all faults is sometimes as high as 80%~90%

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.

And for the starter manufacturer, no matter what the cause of the starter failure is, the starter manufacturer needs to compensate the expenses caused by the failure of the starter, which not only causes huge economic losses, but also seriously affects the quality index and market share.

[0004] In order to ensure that the starter can be disconnected quickly and reliably after the car engine is successfully started, and to avoid damage to the teeth caused by reverse drag or misuse of the ignition, the main engine factory installs a bimetallic starter on the starter. sheet temperature-sensitive protector, but the recovery time is too long due to the thermal inertia of the bimetal sheet, which may lead to a safety accident in an emergency

For example, if there is a short-term overheating protection when starting at an intersection, it needs to wait for a few minutes to recover, which is very likely to be extremely dangerous, so it is rejected by most users when it is promoted and applied in China.

Images