Inlet pressure closed loop adjusting system for testing engine

The utility model relates to an inlet pressure closed loop adjusting system for testing an engine. The system comprises a fuel supercharging system, an oxidizing agent supercharging system, a fuel container, an oxidizing agent container, a pressure measurement device, and a closed loop control device, wherein the containers are both connected with the engine; an output terminal of the fuel supercharging system is connected with the fuel container; an output terminal of the oxidizing agent supercharging system is connected with the oxidizing agent container; the pressure measurement device comprises an acquisition device and a data processor; the acquisition device acquires the pressures of inlets of the engine and the container pressures of the containers of the engine, and transmits the acquired pressures to the data processor; an output terminal of the data processor is connected with an input terminal of the closed loop control device; and an output terminal of the closed loop control device is connected w