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Correcting method for electromagnetic valve of common-rail diesel injector

A technology of fuel injectors and diesel engines, which is applied in the direction of machines/engines, electrical control, mechanical equipment, etc., can solve problems such as unsuitable common rail systems, and achieve the effects of easy calculation and storage, small storage space, and expanded application range

Active Publication Date: 2011-09-21
TSINGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since the rail pressure in the common rail system can be independently controlled and has nothing to do with the speed, this method is not suitable for the common rail system

Method used

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  • Correcting method for electromagnetic valve of common-rail diesel injector
  • Correcting method for electromagnetic valve of common-rail diesel injector
  • Correcting method for electromagnetic valve of common-rail diesel injector

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Embodiment Construction

[0024] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0025] Such as figure 1 As shown, the common rail diesel fuel injector system of the present invention includes an engine 10 and an engine management module 20 . Engine 10 includes several sensors 11 1 、11 2 ......11 n and several injectors 12 1 、12 2 ......12 n . sensor 11 1 、11 2 ......11 n The measured signal is the engine status signal 13 1 、13 2 ......13 n , may be engine speed, throttle opening position, coolant temperature, etc.; fuel injector 12 1 、12 2 ......12 n The control signal is the corresponding final injection fuel quantity signal 25 1 、25 2 ......25 n . The engine management module 20 is preset with an engine oil quantity module 21, and the fuel injector 12 1 Oil quantity correction array, fuel injector 12 2 Fuel Quantity Correction Array...Injector 12 n An oil quantity correction array, and a linear interpolati...

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Abstract

The invention discloses a correcting method for an electromagnetic valve of a common-rail diesel injector. The correcting method comprises the following steps: (1) a sensor of a diesel engine, injectors and a management module are installed, wherein the management module is internally provided with an oil mass module and an oil mass correcting array, the oil mass correcting array comprises two lines of data, wherein the first line of data is the oil mass of a fixed point, and the second line of data is correcting information corresponding to the oil mass of the fixed point and is the 16-bit data; (2) the oil mass module obtains the oil mass of each injector before correction through computation; (3) the management module obtains the oil mass of the fixed point and the corrected oil mass which are closest to the input oil mass from the corresponding oil mass correcting array by using the oil mass before correction as the input; (4) the linear interpolation computation is carried out so as to obtain the corrected oil mass which corresponds to the input mass by using the obtained oil mass before correction as the input and the oil mass of the corresponding fixed point and the corrected oil mass as known quantities; and (5) the corrected oil mass and the oil mass before correction are added so as to obtain the ultimate corrected oil mass. The corrected oil mass is determined by using the oil mass as the input, and therefore the correcting method disclosed by the invention is more suitable for the common-rail system with injection oil mass being irrelevant to the rotating speed and has better correcting effect.

Description

technical field [0001] The invention relates to a fuel injection control method and system for an electronically controlled diesel engine, in particular to a correction method for a solenoid valve of a fuel injector of a common rail diesel engine. Background technique [0002] At this stage, electronically controlled diesel engines mostly use solenoid valves as fuel injection system actuators, such as pump end solenoid valves in electronically controlled single pump diesel engines and electronically controlled injector solenoid valves in common rail diesel engines. This type of solenoid valve actuator is controlled by the drive current: when the drive current is zero, the electromagnetic force is also zero, and the valve stem in the solenoid valve is always in the initial position under the action of the return spring; Under the action of the electromagnetic force generated by the driving current, the valve stem overcomes the spring force and begins to move, away from the in...

Claims

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Application Information

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IPC IPC(8): F02D41/40F02D41/14
Inventor 张科勋杨福源欧阳明高李中郝守刚李进
Owner TSINGHUA UNIV
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