Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Fuel injection controller and controlling method for engine

A fuel injection and control device technology, applied in fuel injection control, engine control, machine/engine, etc., can solve problems such as delay

Active Publication Date: 2019-06-07
TOYOTA JIDOSHA KK
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the completion of the learning of the air-fuel ratio learning value generates a delay

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
  • Fuel injection controller and controlling method for engine
  • Fuel injection controller and controlling method for engine
  • Fuel injection controller and controlling method for engine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0011] Below, refer to Figure 1 to Figure 4 One embodiment of a fuel injection control device for an engine will be described in detail. The fuel injection control device of the present embodiment is applied to a vehicle-mounted engine 10 .

[0012] Such as figure 1 As shown, the engine 10 is an inline four-cylinder engine including four cylinders #1 to #4 arranged in series. The intake passage 11 is provided with an air flow meter 12 for detecting the flow rate (intake amount) of intake air flowing through the intake passage 11 , and a throttle valve 13 for adjusting the intake air amount GA. The intake passage 11 on the downstream side of the throttle valve 13 is provided with an intake manifold 14 as a branch pipe for dividing intake air into different cylinders. The engine 10 is provided with four fuel injection valves 15 that inject fuel into the intake air divided into different cylinders by the intake manifold 14 . One fuel injection valve 15 is provided for each o...

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

The invention provides a fuel injection controller and a controlling method for an engine. The fuel injection controller updates an air-fuel ratio learning value such that the amount of correction ofa fuel injection amount according to an air-fuel ratio feedback correction value approaches zero. Further, the fuel injection controller makes an update rate of the air-fuel ratio learning value lowerwhen the variation among respective-cylinder correction values, which are set for the respective cylinders in order to differentiate air-fuel ratios of a plurality of cylinders, is great than when the variation among the respective-cylinder correction values of the cylinders is small.

Description

technical field [0001] The invention relates to a fuel injection control device and method for an engine. Background technique [0002] There is known a fuel injection control device for an engine that performs feedback control of a fuel injection amount in order to bring an exhaust air-fuel ratio detected by an air-fuel ratio sensor provided in an exhaust passage close to a target air-fuel ratio, and based on the feedback control As a result, the correction amount of the fuel injection amount required to realize the target air-fuel ratio is learned as an air-fuel ratio learning value. Also, as seen in Japanese Patent Application Laid-Open No. 11-287145, there is known an air-fuel ratio control device that maintains the air-fuel ratio in the entire engine including a plurality of cylinders at the target air-fuel ratio while controlling the air-fuel ratio in the engine. The air-fuel ratio of the air-fuel mixture combusted in each cylinder is differentiated, and the fuel inje...

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): F02D41/30F02D41/14
CPCF02D41/0085F02D41/1454F02D41/2454F02D41/2458F02D41/1408F02D41/024F02D2041/0265F02D41/30
Inventor 今井创一井户侧正直
Owner TOYOTA JIDOSHA KK
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com