Method of calibrating injector characteristics for controlling closing time of injectors
A closing time and injector technology, applied in electrical control, engine control, fuel injection control, etc., can solve the problems of sensing injector closing time and difficulty in accurately compensating injector driving characteristics
Active Publication Date: 2021-07-13
HYUNDAI MOTOR CO LTD
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Problems solved by technology
In this case, there is the question of whether the injector closing time is sensed during flow control
[0012] In this case, it is difficult to accurately compensate the injector drive characteristics since the time required for injection cannot be precisely controlled in the small flow range
Method used
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[0033] Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. However, the invention may be embodied in different forms and should not be construed as limited to the exemplary embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Throughout the disclosure, like reference numerals refer to like parts in the various figures and embodiments of the present invention.
[0034] figure 1 is a flowchart schematically showing the precise control logic of the injector applying the method of correcting the driving characteristics of the injector according to the exemplary embodiment of the present invention.
[0035] Such as figure 1As shown, when combustion is performed in the engine, the ECU installed in the vehicle first sets the required amount of fuel (S10)....
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The present invention discloses a method of correcting an injector characteristic for controlling the closing time of the injector. A method for correcting injector characteristics, said method defining a relationship between an injector injection time and a valve closing time of a cylinder of an internal combustion engine by sensing the injector closing time, said method comprising the steps of: sensing injection Injector closing time; when sensing injector closing time failures, use the number of sensed failures to determine the amount of compensation to compensate for the injection command time, or use the desired injection command time in the associated cylinder in addition to the number of sensed failures A compensation amount for compensating the injection command time is determined based on a learning result of the relationship between the injector closing time and the injector closing time; and based on the determined compensation amount, the injection command time is controlled according to the required fuel injection amount in the relevant cylinder.
Description
technical field [0001] The present invention relates to a method of correcting injector characteristics, and particularly to a method of correcting injector characteristics capable of correcting deviations between injector closing times in cylinders by compensating for injector driving characteristics, so The injector driving characteristic described above defines a relationship between the injector injection time and the valve closing time for each cylinder of the internal combustion engine. Background technique [0002] When fuel is supplied to a vehicle engine, the supplied fuel amount is determined by an engine control unit ("ECU"), and the injector injects fuel to the engine according to the determined fuel amount, thereby supplying the fuel to the engine. [0003] Injectors are usually equipped with solenoid valves and are included in each cylinder. In response to a fuel injection signal received from the ECU, the injector injects fuel for a predetermined injection ti...
Claims
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IPC IPC(8): F02D41/40
CPCF02D41/401F02D41/20F02D41/2467F02D2041/2055F02D2200/0602F02D41/008F02D41/2441F02D41/40
Inventor 安景浩韩旻奎
Owner HYUNDAI MOTOR CO LTD