Based on the practical operation of diesel engine fault and a lot of professional experience and knowledge, an improved gray target engine fault diagnosis model was proposed. The ault sign standard model structure was built by Fault-to-date statistical data and professional experience and knowledge,and multi-target heart Failure was constructed. The causes of a diesel engine was diagnosed through the fault symptoms and the cause of the malfunction bull's-eye from all sort and its practicability and validity have been indicated by its result.

The Infrared transfer using data transport protocol plus sign, plus software validation for data transmission, is usually transfer technology. This article provides an overview of the design of hardware circuit simulation of infrared transmission of SPI protocol, and details about the process of transmitting and the receiving program and how it works, and points out some problems which need paying more attention in the design process.