Oil injector fault checking method and device

A fuel injector and fault detection technology, which is applied to fuel injection devices, measuring devices, instruments, etc., can solve the problems of high labor intensity, cumbersome procedures, complex structure, etc., and achieve the goal of reducing labor intensity, simple operation and improving work efficiency. Effect

Active Publication Date: 2013-09-25
WEICHAI POWER CO LTD
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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

Method used

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  • Oil injector fault checking method and device
  • Oil injector fault checking method and device
  • Oil injector fault checking method and device

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Embodiment Construction

[0024] The core of the present invention is to provide a fuel injector fault detection method to realize on-line fault detection and effectively avoid the defects existing in off-line measurement. The present embodiment will be described in detail below in conjunction with the accompanying drawings.

[0025] See figure 1 , which is a flow chart of the fuel injector fault detection method described in this embodiment.

[0026] This detection method is used to judge the fault of the fuel injector when the engine is running. Such as figure 1 As shown, the detection method comprises the following steps:

[0027] S1, the relationship table between the preset operating parameters of the injector and the rated oil return; here, the rated oil return is the threshold obtained by theoretical calculation. It should be understood that the rated oil return volumes corresponding to the operating parameters of the injectors are different for different models of engines and under differen...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M65/00F02D41/22
CPCY02T10/40
Inventor 汤海威林敬国
Owner WEICHAI POWER CO LTD
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