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Electrical actuation of valves based on knowledge of valve closing and opening points

A technology of actuation and closing time, applied in the field of obtaining injection time, direct injection valve, actuation for valve, can solve the problem that the accuracy of fuel quantity will have a negative impact, etc.

Active Publication Date: 2018-02-23
VTESCO TECH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0019] The described actuation of the injection valve has the disadvantage that the timing of both opening and closing of the injection valve or of the injector in the "open coil" phase (limited by tolerances) can have a negative effect on the quantity accuracy of the injected fuel influences

Method used

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  • Electrical actuation of valves based on knowledge of valve closing and opening points
  • Electrical actuation of valves based on knowledge of valve closing and opening points
  • Electrical actuation of valves based on knowledge of valve closing and opening points

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Embodiment Construction

[0069] image 3 The effect of variation in on time and off time is shown. Particularly, image 3 The effects of changes occurring in the injector closing time (Tclose) and injector opening time (Topen) are shown. From the uncorrected injection rate curves (ROIs) 301 , 302 , 303 , and 304 (represented by solid lines), it can be seen that different injectors vary significantly in the rate curves during closing and opening. In this context, all injection valves are actuated with the same current curve. in addition, image 3 Also illustrated are injection quantity curves 305 , 306 and 307 for corrected injection time and actuation time, which already take into account the closing behavior of the injector on an injector-specific basis A correction was made. It should be noted in this context that since the injector has been used as a reference for the correction, it no longer exhibits any deviation due to the method, only three corrected curves are shown. In particular, from ...

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PUM

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Abstract

A method is provided for determining the effective injection time of a valve with a coil drive, wherein the method has the steps of: determining the valve opening time (Topen), determining the valve closing time (Tclose), and taking into account the determined opening time The time and the determined closing time determine the effective injection time (TiN) of the electrical actuation of the valve for the injection operation.

Description

technical field [0001] The invention relates to the technical field of actuating coil drives for valves, in particular direct injection valves for internal combustion engines of motor vehicles. In particular, the invention relates to a method for determining the injection time when operating a valve with increased metering precision. The invention also relates to a corresponding device and a computer program for carrying out the specified method. Background technique [0002] In order to operate modern internal combustion engines and to observe strict limit values ​​for emissions, the engine controller determines the mass of air enclosed in the cylinders per working cycle by means of the so-called cylinder filling mode. Depending on the modeled air mass and the desired ratio between the air mass and the fuel mass (lambda), the value of the set point (MFF_SP) corresponding to the fuel mass is injected by means of the injection valve, which is also described in this document ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D41/24
CPCF02D41/247F02D2041/2055F02D2041/2058F02D41/3005F02M51/005F02M51/061F02M65/00
Inventor J.比尔A.阿廷格
Owner VTESCO TECH GMBH