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Method and control device for correcting the start of injection of injectors of an internal combustion engine

A technology for starting injection and controlling equipment, used in fuel injection control, mechanical equipment, engine control, etc.

Inactive Publication Date: 2016-02-10
MOTOREN UND TURBINEN UNION MUNCHEN GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It has been shown here that the known method is worthy of improvement, since the use of a rail pressure sensor in the supply line to the injector or the pressure on the side of the pressure sensor does not allow a very precise determination of the actual start of injection.

Method used

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  • Method and control device for correcting the start of injection of injectors of an internal combustion engine
  • Method and control device for correcting the start of injection of injectors of an internal combustion engine

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Experimental program
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Embodiment Construction

[0030] figure 1 A block circuit diagram is shown in which the power supply of an injector 1 of an internal combustion engine 2 is schematically shown, the injector 1 having a single accumulator 4 . Within the framework of the illustrated embodiment of the method, the setpoint energization start 3 is preferably determined by the engine controller as a function of at least one parameter of the internal combustion engine 2 . In this case, the nominal current supply start 3 is read out from the current supply characteristic field 5 , for which the value is stored as a function of the speed 7 of the internal combustion engine 2 and as a function of the torque request 9 for the internal combustion engine 2 . Correspondingly, the engine controller reads the setpoint energization start 3 from the energization characteristic field 5 as a function of the instantaneous rotational speed 7 and the instantaneous torque request 9 . The energization characteristic field 5 is designed as an o...

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Abstract

The invention relates to a method for correcting the start of injection of injectors (1) of an internal combustion engine (2), comprising the following steps: determining a target start of current application (3) depending on at least one parameter of the internal combustion engine (2); detecting a pressure in an individual accumulator (4) of an injector (1) and determining a measured start of injection (31) on the basis of the pressure; determining a target injection delay (39) depending on at least one parameter of the internal combustion engine (2); calculating an actual injection delay (33) from the target start of current application (3) and the measured start of injection (31); comparing the target injection delay (39) and the actual injection delay (33); and calculating a start-of-current-application correction variable (17) on the basis of the comparison and correcting the target start of current application (3) by means of the start-of-current-application correction variable (17).

Description

technical field [0001] The invention relates to a method for correcting the start of injection of an injector of an internal combustion engine according to claim 1 and a control device for an internal combustion engine according to the preamble of claim 10 . Background technique [0002] A method is known from German publication DE 10 232 356 A1 in which the start of injection by an injector is detected by means of a pressure sensor and compared with the value stored in a characteristic field (Kennfeld). If there is a deviation, the injection start is corrected in such a way that this deviation disappears. The corresponding correction values ​​are stored. In this case, the pressure sensor is designed within the framework of known methods as a rail pressure sensor or as a sensor in the pressure line leading to the injector. Injectors generally associated with internal combustion engines, especially in injector systems with a common high-pressure accumulator, the so-called c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D41/00F02D41/40F02D41/24F02D41/20
CPCF02D41/0085F02D41/20F02D41/2409F02D41/2432F02D41/2467F02D41/248F02D41/401F02D2200/0602Y02T10/40
Inventor M.瓦尔德A.梅尔C.恩格勒F.姆利基C.沃尔夫A.贝恩哈德
Owner MOTOREN UND TURBINEN UNION MUNCHEN GMBH
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