Turbocharged direct-current electric actuating mechanism and method for automatically controlling blade openness thereof

Abstract

The invention discloses a turbocharged direct-current electric actuating mechanism and a method for automatically controlling blade openness thereof. The turbocharged direct-current electric actuating mechanism comprises a direct-current motor, a speed reducing mechanism, a position detecting sensor and a circuit control board, a signal processing circuit comprises a transient voltage restraining and stabilizing module, a PWM (pulse-width modulation) port, a CAN (controller area network) port, a controller, a direct-current motor driving module and a position sensor signal regulating module, the transient voltage restraining and stabilizing module is connected with the PWM port, the CAN port and the direct-current circuit driving module, the controller is connected with the direct-current motor driving module which is connected with the direct-current motor, the speed reducing mechanism is connected with the position detecting sensor and a turbocharger spraying nozzle ring assembly, and the position detecting sensor is connected with the position sensor signal regulating module which is connected with the controller. The turbocharged direct-current electric actuating mechanism has the advantages of small size, resistance to high temperature, heat energy, fast response, low energy consumption and high reliability, and can realize the optimum matching with a motor.

Description

Technical field [0001] The invention relates to an electric actuator, in particular to a variable cross-section turbocharged electric actuator driven by a DC motor and a method for controlling the opening degree of a turbocharger nozzle ring vane. Background technique [0002] As we all know, turbocharger is an important part of supercharged engine, which includes turbine, pump wheel and actuator. Under the same displacement, turbocharger can increase engine output power, reduce fuel consumption and reduce exhaust gas. emission. The turbocharger uses the exhaust of the engine to drive the turbine blades to rotate at a high speed, driving the coaxially connected compressor-side blades located in the engine intake port to rotate at a high speed for supercharging, increasing the air flow into the engine cylinder and burning the fuel. More fully, so as to achieve the purpose of increasing output power. The opening of the blades on the nozzle ring can be adjusted. The opening of the...

AI Technical Summary

Problems solved by technology

At present, there are several electric actuators that control the opening of the nozzle ring blades on the turbine pressure generator, while domestic turbocharged internal combustion engine products generally use vacuum valves or hydraulic valves as actuators to control the opening of the nozzle ring of variable cross-section turbochargers. These products have low control precision, slow response speed, large volume, and low reliability. There are also some research reports using stepper motor drive. Most of them collect various signals such as throttle position, intake pressure, and engine speed separately. , and the stepper motor has poor high temperature resistance, large volume, and high power consumption, and cannot be connected with the automobile electronic control board, so the report on the stepper motor drive only stays in the laboratory stage, and cannot form a product

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