Oil injector fault checking method and device

Abstract

The invention discloses an oil injector fault checking method. The method includes presetting a relation table between working parameters and rated oil return amount of oil injectors; and in a working state of an engine, executing the steps: acquiring current oil return flow of an oil injector oil return pipe of each air cylinder of the engine and working parameters of the current oil injector; inquiring the relation table according to the working parameters of the current oil injector, and acquiring a judging result that the corresponding oil injector is in a fault state on the condition that the current oil return amount is inconsistent with the rated oil return amount of the corresponding oil injector. Operation can be performed in a work site of the engine without detaching the oil injectors, the method is simple to execute in operation, faulted oil injectors can be judged accurately and rapidly, working efficiency of maintenance staff is improved, and labor intensity is reduced. In addition, a device is low in cost and can be configured in engine maintenance sites. On the basis, the invention further provides an oil injector fault checking device.

Description

technical field [0001] The invention relates to the technical field of vehicle power fault detection, in particular to a fuel injector fault detection method and device. Background technique [0002] With the gradual upgrading of domestic automobile pollutant emission regulations, electronic control technology in the engine field has been developed and put into use. Unlike previous engines that use mechanical pumps to control fuel supply, the control system of electronically controlled common rail engines receives signals from various sensors and outputs fuel injection pulse signals to the injectors. Control the fuel injection quantity and injection time, spray atomized diesel oil directly into the cylinder to burn and do work to provide energy; thus, ensure the best combustion ratio, atomization and best ignition time of the diesel engine, as well as good economy and minimum pollution emissions. [0003] Among them, the working reliability of the fuel injector directly af...

AI Technical Summary

Problems solved by technology

[0005] However, the fuel injector must be removed from the engine to test the state of the fuel injector using the fuel injector test bench, that is, off-line measurement, labor-intensive, and the process is relatively cumbersome

In addition, because the test bench needs to simulate some signals of the engine to drive the injector, the structure is relatively complicated and the cost is relatively high

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