Unlock instant, AI-driven research and patent intelligence for your innovation.

Apparatus for controlling quantity of fuel to be actually sprayed from injector in multiple injection mode

A technology of fuel injection quantity and fuel injection, which is applied in the directions of fuel injection control, electrical control, engine control, etc., and can solve problems such as reduced accuracy

Inactive Publication Date: 2012-06-20
DENSO CORP
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Therefore, a method to solve this precision loss problem is proposed

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Apparatus for controlling quantity of fuel to be actually sprayed from injector in multiple injection mode
  • Apparatus for controlling quantity of fuel to be actually sprayed from injector in multiple injection mode
  • Apparatus for controlling quantity of fuel to be actually sprayed from injector in multiple injection mode

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0076] refer to figure 2 , which shows the overall structure of a fuel injection system 10 mounted on a motor vehicle according to a first embodiment of the present invention. The fuel injection system 10 includes a direct combustion injection engine 60 such as a diesel engine 60 installed on a motor vehicle, and supplies fuel to the diesel engine 60 .

[0077] The fuel injection system 60 also includes a fuel tank 12, a fuel supply pump 14, a high pressure pump 16 with a regulating valve 18, an accumulator 20, an injector 30, an ECU (Electronic Control Unit) 40 as control means, and the like.

[0078] The diesel engine 60 is provided with a plurality, such as four, of internally hollow cylinders 62 for combustion.

[0079] The diesel engine 60 is equipped with a plurality, such as four, of pistons 64 installed in respective cylinders 62 . To simplify, figure 2 One of the cylinders 62 is shown in . Cylinder 62 is integrated with other cylinders into one cylinder block. ...

no. 2 example

[0190] A fuel injection system according to a second embodiment of the present invention will be described below.

[0191] In the second embodiment, the hardware structure of the fuel system according to the second embodiment of the present invention is the same as that of the fuel injection system 10 in the first embodiment. Therefore, the view of the hardware structure of the fuel injection system of the second embodiment is omitted.

[0192] Similar reference characteristics are used for similar components in the fuel injection systems according to the first and second embodiments, and the functional differences between the fuel injection system 10 according to the first embodiment and the fuel injection system according to the second embodiment will be described below. difference.

[0193] In the second embodiment, when the learning condition is met ( Figure 8 Step S300 in "Yes"), the CPU 52 operates in the learning mode to inject the first target in the first injection...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

In an apparatus, an actual fuel spray characteristic obtaining unit obtains, based on an operation of a learning fuel injection instructing unit in a learning mode, an actual fuel spray characteristic of an injector relative to a variable of a target interval period within at least one section in a usable range therefor. A phase difference calculating unit calculates a phase difference between a reference fuel spray characteristic and the obtained actual fuel spray characteristic. A phase correcting unit shifts the reference fuel spray characteristic by the calculated phase difference such that the reference fuel spray characteristic is corrected to approach the obtained actual fuel spray characteristic.

Description

technical field [0001] The invention relates to a device for controlling the amount of fuel injected by an injector in a multiple injection mode of an internal combustion engine. In the multiple injection mode, the internal combustion engine causes the injector to perform multiple fuel injections within one working cycle of the internal combustion engine. Background technique [0002] Fuel injection systems typically utilize one injector in each cylinder of an internal combustion engine to control fuel injection. In order to reduce combustion noise, emissions of nitrogen oxides (NOX) and / or regeneration of exhaust filters, a fuel injector is designed that performs within one working cycle of an internal combustion engine in a multiple injection mode (multi-stage injection mode) Multiple fuel injection. [0003] Injectors are typically designed to move a valve to open a port to inject a certain amount of fuel into the corresponding cylinder, and to move the valve to close t...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): F02D41/00
Inventor 山田直幸今井稔石塚康治
Owner DENSO CORP