Fuel metering valve control system and fuel regulator

Abstract

The invention discloses a fuel metering valve control system which comprises a metering valve comprising a regulating valve core, a minimum flow limiter and a maximum flow limiter which are arranged at the two ends of the metering valve respectively, a Q value regulator connected with the metering valve, a digital pulse solenoid valve connected with the Q value regulator, and a controller used for controlling the digital pulse solenoid valve to generate high-frequency motion for enabling the regulating valve core to move to a maximum flow limiting screw to increase the oil supply quantity when judging that the oil pressure in the control cavity of the metering valve is higher than the oil pressure at the front part of the metering valve. According to the fuel metering valve control system disclosed by the embodiment of the invention, the oil supply precision of a fuel regulator can be improved, the response speed of the fuel regulator can be increased, the service life of the fuel regulator can be prolonged; the fuel metering valve control system has the advantages of simple structure and simplicity for matching, and is relatively good in usability. The invention further discloses the fuel regulator.

Description

technical field [0001] The invention relates to the technical field of engine control, in particular to a fuel metering valve control system and a fuel regulator. Background technique [0002] In the engine control link, the fuel supply accuracy of the fuel regulator directly determines the stability of the engine speed, and the fuel supply accuracy depends on the response speed and stability of the metering valve control loop. [0003] The fuel supply volume of the fuel regulator is determined by the flow area A matching the regulating spool of the metering valve and the bushing hole, and the fuel pressure difference ΔP flowing through the flow area. Under certain working conditions, △P is a fixed value, therefore, the oil supply depends on the flow area A. By changing the position of the regulating spool, different flow areas can be obtained, but how to drive the regulating spool to a desired position requires a spool regulating mechanism. [0004] The currently widely u...

AI Technical Summary

Problems solved by technology

The motor drive is limited by the heat dissipation, service life and control accuracy of the motor, and cannot meet the requirements of the engine for the fuel supply accuracy and service life of the fuel regulator; the drive mode of the servo mechanism is subject to low temperature adaptability and pollution resistance, and cannot meet the requirements of the engine. Requirements

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