Exhaust back pressure wave adjustment device for supercharged diesel engine

Abstract

The invention discloses an exhaust back pressure wave adjustment device for a supercharged diesel engine. A high-temperature electronic and electric adjustment valve receives control current of a high-speed current output card, controls the upstream exhaust pressure through the magnitude of the opening of a valve body and feeds back the opening signal of the valve body to a high-speed data acquisition card; a dynamic pressure sensor converts the exhaust pressure signal into a current signal; the high-speed data acquisition card acquires an exhaust pressure wave, the opening value of the high-temperature electronic and electric adjustment valve and the feedback numerical value of the control current; the high-speed current output card discretizes the curve of the control current signal and outputs the discretized curve of the control current signal to a signal input end of the high-temperature electronic and electric adjustment valve; and an industrial personal computer is used for acquiring and processing signals, sending control signals, and generating, displaying, comparing and storing data curves. The device can simulate the dynamic exhaust back pressure wave which is generated by motion of sea waves and applied to a diesel engine working underground in an air pipe state, and the wave form, the wave amplitude and frequency can be adjusted.

Description

technical field [0001] The invention relates to the field of experimental research on the working performance of a diesel engine in an underwater environment, in particular to a supercharged diesel engine exhaust back pressure wave regulating device capable of simulating the exhaust back pressure wave borne by a special-purpose diesel engine. Background technique [0002] When the diesel engine is running underwater, it is subjected to high intake vacuum and high exhaust back pressure. It is necessary to establish a special underwater environment simulation test bench to simulate the environmental conditions of the diesel engine when it works underwater. [0003] The exhaust back pressure wave adjustment of the diesel engine generally adopts a high temperature resistant electronic electric control valve, which accepts an electrical signal of 4-20mA or 1-5V, and achieves the purpose of adjusting the exhaust back pressure wave through the change of the valve opening. [0004] ...

AI Technical Summary

Problems solved by technology

This steady-state exhaust back pressure regulating device cannot reflect the exhaust back pressure waveform formed by ocean wave motion, and cannot be adjusted and controlled

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