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Drive control device of electromagnetic fuel pump nozzle

A fuel pump and electromagnetic pump technology, applied in fuel injection control, electrical control, engine control, etc., can solve problems such as inaccurate or even contrary predictions

Inactive Publication Date: 2013-01-23
ZHEJIANG FAI ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Theoretically, this method has a certain compensation effect on the fluctuation of power supply voltage and the change of coil temperature, but it cannot be correct or even give the opposite prediction for other factors affecting the injection flow rate.

Method used

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  • Drive control device of electromagnetic fuel pump nozzle
  • Drive control device of electromagnetic fuel pump nozzle
  • Drive control device of electromagnetic fuel pump nozzle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0074] figure 1 It is a schematic diagram of the nozzle structure of an electromagnetic fuel pump. Its working process is: after the fuel enters the pressure delivery chamber 5, under the action of the plunger 4, it passes through the oil outlet valve 7 to the nozzle 6. When the fuel reaches a predetermined pressure, such as 15bar, Discharged from nozzle 6. The movement of the plunger 4 comes from the electromagnetic force generated after the solenoid device 3 is energized, and the solenoid device 3 is driven by the PWM pulse voltage sent by the ECU unit 2 . The duty ratio of the PWM pulse voltage determines the fuel injection quantity Qi, and under the condition that other conditions remain unchanged, the fuel injection flow Qi is proportional to the driving pulse width T1. The demand of the engine for the fuel injection flow rate is mainly determined by the operating data 8 of the engine, which includes the engine speed, thermal load, and environmental conditions. This ele...

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PUM

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Abstract

A driving controlling method and apparatus for an electromagnetic fuel pump nozzle (6) are provided, in which a target feedback signal is obtained based on a plunger (4) displacement signal, especially characteristic parameters of a residual voltage curve. A driving pulsewidth is predicted based on the target feedback signal, a target fuel injection amount at a time is controlled based on the predicted driving pulsewidth, thus closed-loop controlling for the electromagnetic fuel pump nozzle (6) is realized. The accuracy of the fuel amount supplied to the engine can be improved and the variation of the fuel injection amount caused by some factors is avoided or reduced, these factors are mechanical wear, variations of return spring force, the opening pressure for the nozzle (6), the resistance force in the fuel pipe, the flow coefficient for the nozzle, the liquid viscosity, the frictional force produced by the fuel impurity and the driving voltage, etc. Therefore, the ECU (21) can real-time monitor the electromagnetic fuel pump nozzle (6) and diagnose the abnormality and the malfunction.

Description

[0001] The application for the present invention is a divisional application with application number: 200610079743.8, the application date is May 12, 2006, and the name of the invention is "a drive control method and device for an electromagnetic fuel pump nozzle". The original application claimed the right of priority, and the filing date of the earlier application as the basis of the priority right was April 11, 2006, the application number was 200610050296.3, and the country of the earlier application was China. technical field [0002] The invention belongs to the technical field of engines, and in particular relates to an engine management system, in particular to a closed-loop control method and device for an electromagnetic fuel pump nozzle device. Background technique [0003] Electromagnetic fuel pump nozzles, as a new type of fuel supply unit, have been proven to be applied to engine management systems, especially in two-wheeled motor vehicles powered by single-cyli...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D41/32
CPCF02D2041/2051F02D41/20F02D41/221
Inventor 郗大光杨延相刘昌文
Owner ZHEJIANG FAI ELECTRONICS