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Control device for internal combustion engine

A technology for control devices and internal combustion engines, which is applied in engine control, fuel injection devices, fuel injection control, etc., and can solve problems such as the inability to determine the current detection unit and the inability to determine the detection current offset

Active Publication Date: 2019-08-16
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
Comparison scheme
Effect test

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

The ECU (30) calculates the peak current reaching time (Tp') (the time until the detected current reaches the target peak current (Ip)), and calculates the prescribed current reaching differential time (ΔTth) (from when the detected current exceeds the prescribed current (Ith) time until the specified current (Ith) falls below). Then, the predetermined peak current attainment time (Tp) corresponding to the current predetermined current attainment difference time (ΔTth) is calculated by using the relationship between the predetermined current attainment difference time (ΔTth) and the predetermined peak current attainment time (Tp) stored in advance. Using the specified peak current reaching time (Tp), compare the current peak current reaching time (Tp') with the specified peak current reaching time (Tp) (for example, calculate the peak current reaching time (Tp') and the specified peak current reaching time (Tp) difference (ΔTp)), thereby determining the offset of the detection current of the 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 Patents(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