Method for accurately controlling pressure difference at air inlet hole of automobile engine

Abstract

The invention discloses a method for accurately controlling the pressure difference at an air inlet hole of an automobile engine. The method is characterized in that an electromagnetic valve (3) is arranged at an air inlet throat hole (2) of the engine (1), a first pressure sensor (4) and a second pressure sensor (5) are installed on the electromagnetic valve upstream and downstream respectively,the electromagnetic valve, the first pressure sensor and the second pressure sensor are connected with a control unit (6) through cables, and the control unit is connected with a monitoring computer (7) through a cable; and when the engine operates at a rated point, an air inlet pressure difference target value at the air inlet hole of the engine is set through the monitoring computer or the control unit, the first pressure sensor and the second pressure sensor collect air inlet pressure values at the front point and the rear point of the electromagnetic valve in real time and transmit the airinlet pressure values to the control unit, and the control unit adjusts the opening degree of the electromagnetic valve according to the deviation between the pressure difference and the target valuefor reaching a set control range, and the monitoring computer monitors the pressure difference value in real time. According to the method, the pressure difference at the air inlet hole of the automobile engine can be accurately controlled, and safety and reliability are achieved.

Description

technical field [0001] The invention relates to the technical field of pressure loss test of an automobile engine intake system, in particular to a pressure difference control method of an engine intake port. Background technique [0002] In the pressure loss test of the air intake system of the automobile engine, the valve opening of the engine air intake valve in the laboratory should be manually controlled to control the intake pressure. The air intake loss caused by the intake pipe and other components is the closest to the air intake environment of the test room and the actual vehicle intake environment. This method requires manual adjustment of the control valve at the rated point of the engine, and the air inlet is often located near the engine. The high-speed operation of the engine will pose a great threat to the safety of the adjustment personnel, and manual adjustment is difficult to control the adjustment. precision. Contents of the invention [0003] The pur...

AI Technical Summary

Problems solved by technology

This method requires manual adjustment of the control valve at the rated point of the engine, and the air inlet is often located near the engine. The high-speed operation of the engine will pose a great threat to the safety of the adjustment personnel, and manual adjustment is difficult to control the adjustment. precision

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