Electronic control high-pressure oil pump, connector reversal detecting device and detecting method

Abstract

The invention provides an electrical control high-pressure oil pump, and a connector reversal detecting device and a detecting method thereof, so as to achieve quick and accurate detection of connector reversal. The detecting method comprises the following steps: detecting whether the pressure-limiting valve of a common rail pipe is opened, if yes, acquiring the duty cycle of a fuel gauging unit and the rail pressure of a common rail pipe and judging whether the duty cycle is in direct proportion to the rail pressure, if yes, sending out connector reversal signals. The detecting device comprises a controller and an acquisition device in signal connection with the controller, the acquisition device is used for acquiring the duty cycle of the fuel quantity metering unit and the rail pressure of the common rail pipe, and judging the variation relation between the duty cycle and the rail pressure; the controller is in signal connection with the pressure-limiting valve of the controller and can be used for controlling the work of the acquisition device when the pressure-limiting valve is opened; when the acquisition device acquires that the duty cycle is in direct proportion to the rail pressure, the controller sends out connector reversal signals. According to the invention, the characteristic that the duty cycle is in direct proportion to the rail pressure is used in case of connector reversal of the electrical control high pressure oil pump, the operation is simple, quick and convenient, and the detection precision is high.

Description

technical field [0001] The invention relates to the technical field of diesel engines, in particular to a detection method for reverse connection of an interface of an electronically controlled high-pressure oil pump. The present invention also relates to a detection device using the above detection method, and an electronically controlled high-pressure oil pump with the above detection device. Background technique [0002] The electronically controlled high-pressure common rail system means that the diesel oil is sucked out from the fuel tank by the gear pump, delivered to the diesel fine filter through the oil-water separator and the gear pump, and then delivered to the common rail pipe through the electronically controlled high-pressure oil pump, and then conveyed by the common rail pipe The entire oil circuit system to the fuel injector, as well as the closed-loop fuel supply system composed of sensors and ECU (Electronic Control Unit), is a fuel supply method that compl...

AI Technical Summary

Problems solved by technology

[0008] In actual production, for the convenience of processing and assembly, the interface sizes of the inlet and outlet ports of the electronically controlled high-pressure oil pump are the same, so assembly errors are prone to oc

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