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Control device for internal combustion engine

A technology for a control device and an internal combustion engine, which is applied in the directions of engine control, fuel injection control, fuel injection device, etc., can solve the problems of inability to determine the detection current offset, inability to determine the current detection part, etc.

Active Publication Date: 2017-05-31
DENSO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the technology of the above-mentioned Patent Document 1, it is impossible to determine the deviation of the detected current of the current detection unit (it is impossible to determine whether the detected current is accurate), so it is impossible to detect the deviation early in the detection current. current offset

Method used

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  • Control device for internal combustion engine
  • Control device for internal combustion engine
  • Control device for internal combustion engine

Examples

Experimental program
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Embodiment Construction

[0033] Next, an example that embodies the means for carrying out the present disclosure will be described.

[0034] First, based on figure 1 The schematic configuration of the engine control system will be described.

[0035] An air cleaner 13 is provided at the most upstream part of the intake pipe 12 of the in-cylinder injection engine 11, which is an in-cylinder injection internal combustion engine, and an air cleaner 13 is provided on the downstream side of the air cleaner 13 to detect the amount of intake air. The air flow meter 14. A throttle valve 16 whose opening is adjusted by a motor 15 and a throttle opening sensor 17 which detects the opening of the throttle valve 16 (throttle opening) are provided on the downstream side of the air flow meter 14 .

[0036] Further, a pressure regulating chamber 18 is provided on the downstream side of the throttle valve 16 , and an intake pipe pressure sensor 19 for detecting an intake pipe pressure is provided in the pressure re...

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PUM

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Abstract

An ECU (30) calculates a peak current reaching time (Tp') (time it takes for a detection current to reach a target peak current (Ip)) as well as a specific current reaching difference time (delta Tth) (time it takes for the detection current to fall below a specific current (Ith) after having risen above the specific current (Ith). Then, using a pre-stored relation between specific current reaching difference time (delta Tth) and predefined peak current reaching time (Tp), the ECU calculates a predefined peak current reaching time (Tp) that corresponds to the present specific current reaching difference time (delta Tth). Using this predefined peak current reaching time (Tp), the ECU compares the present peak current reaching time (Tp') with the predefined peak current reaching time (Tp) (for example, the difference (delta Tp) between the peak current reaching time (Tp') and the predefined peak current reaching time (Tp) is calculated) in order to determine a detection current deviation of a current detection circuit (36).

Description

[0001] Cross-reference of related applications [0002] This application is based on Japanese Patent Application No. 2014-204472 filed on October 3, 2014, and the content of the description is incorporated herein. technical field [0003] The present disclosure relates to an invention related to a control device for an internal combustion engine that controls a drive current of an electromagnetically driven fuel injection valve. Background technique [0004] In general, an electromagnetically driven fuel injection valve drives a valve body to open by an electromagnetic force generated when a drive coil is energized. At this time, the valve opening characteristic of the fuel injection valve changes according to the driving current curve (waveform of the driving current) of the fuel injection valve, so the deviation of the driving current curve, especially the deviation of the peak current value (peak value of the driving current) affects the fuel injection valve. The valve o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D41/20F02M51/00F02M51/06
CPCF02D41/20F02M51/00F02M63/0007F02D2041/2003F02D2041/2058F02M63/0017F02D2041/2055F02D2041/202F02D41/2467F02M51/061
Inventor 矢野东敬介
Owner DENSO CORP