Fault early warning device and method for multi-cylinder internal combustion engine in idling condition

Abstract

The invention provides a fault early warning device and method for a multi-cylinder internal combustion engine in an idling condition. The device comprises an optical-electricity encoder, a controllercircuit, a power supply conversion circuit, an I / O interface, a soft strap interface, a digital display interface and an alarming interface; the optical-electricity encoder is arranged on the end portion of a crankshaft and is connected to the controller circuit through the I / O interface to send a TTL pulse signal; the power supply conversion circuit is separately connected to the controller circuit, the I / O interface, the digital display interface and the alarming interface to supply power by converting an outer power supply; the controller circuit is connected to the soft strap interface toreceive setting of parameters; the controller circuit is connected to the digital display interface for sending a fault index value acquired according to a instantaneous speed of the crankshaft to adisplay device; and the controller circuit is connected to the alarming interface for sending alarming information to an alarming device when the fault index value exceeds a preset threshold value. The device provided by the invention is simple in structure and low in cost, and the indexes calculated by the method are obvious in physical meaning, and the method is small in calculating amount and easy to implement.

Description

technical field [0001] The invention belongs to the field of internal combustion engine monitoring and early warning, and relates to a monitoring and early warning of combustion faults of four-stroke multi-cylinder internal combustion engines, in particular to a multi-cylinder internal combustion engine fault early warning device and method under idling speed conditions, specifically a multi-cylinder internal combustion engine under idling speed conditions A device for data collection, processing and information transmission of crankshaft position and speed detection, and a fault early warning method. Background technique [0002] The multi-cylinder internal combustion engine is the main power source of transportation at the present stage. The orderly combustion of fossil fuels in the internal combustion engine drives the crankshaft to rotate, and drives vehicles, ships, etc. through clutches, gearboxes and other equipment. Smooth and even combustion can not only reduce noi...

AI Technical Summary

Problems solved by technology

However, problems such as low hardware reliability and ambiguous fault location brought about by multi-parameter monitoring are still prominent

Images