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

Control system and control method for internal combustion engine equipped with supercharger

A technology of control system, internal combustion engine, applied in engine control, fuel injection control, internal combustion piston engine, etc., can solve the problem of not providing target torque or target boost pressure, etc.

Inactive Publication Date: 2008-05-14
TOYOTA JIDOSHA KK
View PDF3 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in any of the above-mentioned patent publications, there is no specific content about setting the target torque or the target supercharging pressure

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
  • Control system and control method for internal combustion engine equipped with supercharger
  • Control system and control method for internal combustion engine equipped with supercharger
  • Control system and control method for internal combustion engine equipped with supercharger

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0028] Referring to FIGS. 1 to 5 , a first exemplary embodiment of the present invention will be described in detail below. Fig. 1 schematically shows an internal combustion engine equipped with a supercharger, which employs a control system according to a first embodiment of the present invention. In this embodiment, the invention is applied to a so-called turbo engine, ie an internal combustion engine equipped with a turbocharger, which is a type of supercharger. As shown in FIG. 1 , the turbine engine has an engine body 2 to which an intake passage 4 and an exhaust passage 8 are connected. A surge tank 6 is formed in the intake passage 4 , and an electronically controlled throttle valve 12 is provided upstream of the surge tank 6 . The turbocharger 10 includes a compression wheel 10 a disposed in the intake passage 4 and a turbine 10 b disposed in the exhaust passage 8 . In operation, the compression wheel 10a and turbine 10b rotate as a unit. A wastegate 14 is also prov...

no. 2 approach

[0050] Referring to FIGS. 6 to 9 , a second exemplary embodiment of the present invention will be described in detail below. FIG. 6 is a block diagram showing the operation of the ECU 20 when executing throttle control. In this embodiment, the ECU 20 functions as a first calculation unit 22 for calculating a provisional target throttle opening, a second calculation unit 24 for calculating a target throttle flow rate (target intake mass flow rate), and a calculation target during throttle control. A third calculation unit 26 for throttle opening and a fourth calculation unit 28 for setting a virtual upstream intake pressure. Operations of the ECU 20 serving as the first computing unit 22 , the second computing unit 24 and the third computing unit 26 are similar to the corresponding operations of the ECU 20 in the first embodiment. Hereinafter, the operation of the ECU 20 serving as the fourth computing unit 28, which is the main feature of the second embodiment, will be mainly...

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

A control system for an internal combustion engine equipped with a supercharger calculates a target intake mass airflow (mt') in accordance with an accelerator pedal travel (thetaA), using a virtual internal combustion engine model having a virtual upstream intake air pressure (PA). The control system then calculates a target throttle opening (thet) in accordance with a measured upstream intake pressure (PIN) so as to provide the target intake mass airflow (mt'), and controls a throttle valve based on the target throttle opening (theta).

Description

technical field [0001] The present invention generally relates to a control technique for a supercharger-equipped internal combustion engine, and more particularly, to a throttle control technique for improving acceleration characteristics (or torque characteristics) of a supercharger-equipped internal combustion engine. Background technique [0002] For example, various types of Throttle valve control technology in turbochargers for internal combustion engines. Determining the target torque or target supercharging pressure and controlling the throttle to obtain the target torque or target supercharging pressure are common features of the conventional techniques disclosed in these publications. For example, in the prior art disclosed in JP-A-2004-60479, a turbo hysteresis index is calculated based on information on supercharging pressure, and the throttle opening is controlled based on the turbo hysteresis index to provide desired torque characteristics. In the prior art d...

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): F02D41/00F02D23/02
CPCF02D23/02F02D2041/1433F02D41/0007F02D2200/0406F02D2200/0402Y02T10/144F02D2250/21Y02T10/12
Inventor 永乐玲
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