A method for controlling the combustion chamber of a turbocharger test bench with a mixing section

Abstract

The invention provides a control method of a turbocharger testing stand combustion chamber with a mixing section. The control method includes following content: acquiring a real-time combustion gas temperature and a real-time combustion gas flow passing a flange of an outlet of the combustion chamber, comparing the real-time combustion gas temperature and the real-time combustion gas flow with a preset target combustion gas temperature and a preset target combustion gas flow, and obtaining a delta combustion gas temperature deviation and a delta combustion gas flow deviation; closed-loop control: abstracting four states according to the states of the delta combustion gas temperature deviation and the delta combustion gas flow deviation, then selecting a corresponding closed-loop control method according to a state machine, and calculating control currents of an air-inlet regulating valve and an air supply port regulating valve; and introducing a feedforward control link to shorten theregulation period. The control method is advantageous in that through the combustion gas temperature and the combustion gas flow of the rear flange, the opening degree of valves of an air inlet and anair supply port can be rapidly adjusted, the air flow and the combustion temperature of the outlet of the combustion chamber are changed, and stable rotating speed of a turbocharger in a test processis guaranteed.

Description

technical field [0001] The invention belongs to the technical field of electronic control, in particular to a method for controlling a combustion chamber of a turbocharger test bench with a mixing section. Background technique [0002] When carrying out compressor performance tests, turbine flow characteristics tests, and turbine efficiency tests on the turbocharger component test bench, it is necessary to strictly control the speed of the turbocharger. If the speed of the turbocharger fluctuates greatly, the test results will have large errors. [0003] The conventional turbocharger test bench with a single-tube combustion chamber has a simple structure and does not require control, but it is difficult to meet the requirements of high-precision test results; the turbocharger test bench with a mixing section has good adjustment characteristics, but Improper control methods will aggravate the speed fluctuation of the supercharger. Contents of the invention [0004] In view...

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Problems solved by technology

[0003] The conventional turbocharger test bench with a single-tube combustion chamber has a simple structure and does not require control, but it is difficult to meet the requirements of high-precision test results; the turbocharger test bench with a mixing section has good adjustment characteristics, but Improper control method will aggravate the speed fluctuation of supercharger

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