Check patentability & draft patents in minutes with Patsnap Eureka AI!

Diesel engine control device and control method

A technology of diesel engine and control device, applied in engine control, combustion engine, machine/engine, etc., can solve problems such as soot increase

Active Publication Date: 2017-02-15
NISSAN MOTOR CO LTD
View PDF5 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In addition, as the second factor, there can be mentioned the reason that after-injection is performed in a low-oxygen place in the main combustion due to the ignition delay of the main combustion, and the soot increases due to the lack of oxygen.

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
  • Diesel engine control device and control method
  • Diesel engine control device and control method
  • Diesel engine control device and control method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0021] Hereinafter, an embodiment of the present invention will be described in detail based on the drawings.

[0022] figure 1 It is an explanatory diagram showing the structure of the direct injection diesel engine 1 according to the present invention together with its intake and exhaust system. The piston 4 is slidably fitted in the cylinder 3 formed in the cylinder block 2 and The cylinder head 5 fixed on the upper surface covers the upper end opening of the cylinder 3 .

[0023] A concave chamber 6 is recessed on the top surface of the piston 4 . The chamber 6 is formed concentrically with respect to the piston 4 and has a large opening diameter. In addition, a multi-hole fuel injection nozzle 7 is disposed on the side of the cylinder head 5 and at the center of the cylinder 3 corresponding to the center of the chamber 6 . In this embodiment, the above-mentioned fuel injection nozzles 7 are arranged along the central axis of the cylinder 3 , that is, vertically.

[0...

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

This direct injection diesel engine (1) is provided with a fuel injection nozzle (7) which is capable of multistage injection. In the medium to high load range, in order to decrease soot, an after-injection occurs immediately after the main injection. In the case of fuel with a low cetane number, after-injection can cause worsening of soot, so the ignition delay period of the main combustion is calculated (step 2), and if the ignition delay period is greater than or equal to a threshold value (step 3), then after-injection is prohibited (step 4).

Description

technical field [0001] The present invention relates to a control device and control method for a direct injection diesel engine equipped with a fuel injection nozzle capable of performing multi-stage injection and performing post injection immediately after main injection. Background technique [0002] Patent Documents 1, 2, etc. describe techniques in which, in order to suppress the generation of soot (soot), which is a problem in direct-injection diesel engines, after-injection is performed for a short period of time immediately after the main injection is completed, so that The soot that accompanies the combustion of the main injection burns with the post-injected fuel. [0003] In this post-injection technology, there is a certain optimum value as the time interval from the end of the main injection to the start of the post-injection, such as Figure 5 As shown in the characteristic a of , if the time interval indicated by the horizontal axis is gradually increased, the...

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 Applications(China)
IPC IPC(8): F02D41/40F02D45/00
CPCF02D41/3035F02D41/405F02D35/028F02D2250/38F02B17/005Y02T10/40F02D37/02F02D41/402F02D2041/389F02D2200/02
Inventor 上原一将
Owner NISSAN MOTOR CO LTD
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com