Method for controlling electric exhaust gas bypass valve of turbocharged engine

A wastegate valve and turbocharging technology, applied in engine control, electrical control, combustion engine, etc., can solve problems such as unstable engine operation and sudden increase in boost pressure, to avoid unstable torque control and prevent increase. The effect of excessive pressure and improving transient response

Active Publication Date: 2017-01-25
CHERY AUTOMOBILE CO LTD
View PDF6 Cites 15 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In summary, there are the following technical problems in the prior art: turbocharged engine wastegate, including two control modes of pneumatic control and electric control, the existing control strategy is to rely on the current intake pressur...

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
  • Method for controlling electric exhaust gas bypass valve of turbocharged engine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0031] The present invention will be described in detail below according to the accompanying drawings, which is a preferred embodiment among various implementations of the present invention.

[0032] In a preferred embodiment, a turbocharged engine electric wastegate valve control method, the present invention is a kind of torque model structure of the engine electronic control system on the control of boost pressure, the problem to be solved by the patent of the present invention is, for Avoid the turbocharger wastegate valve being too sensitive to the intake pressure at a small opening, resulting in pressure fluctuations, resulting in unstable engine operation control. Combined with the existing electronically controlled torque structure model, this patent has invented a control strategy for the electric wastegate valve. The control strategy judges whether the engine is in full boost mode by judging the operating conditions of the engine. If it is in full boost In the mode, ...

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 relates to a method for controlling an electric exhaust gas bypass valve of a turbocharged engine. The method comprises the following steps: judging whether the operating condition of the engine is in a full supercharge mode or not; if yes, firstly controlling the exhaust gas bypass valve to be closed, and controlling the intake pressure of the engine by controllingvalve phase timing; if the operating condition of the engine is in a non-full pressurization mode, when intake pressure is smaller than basic supercharge pressure, controlling the electric exhaust gas bypass valve of the turbocharged engine to be fully opened, and carrying out the load control by adjusting the degree of the opening of an electronic throttle valve, and when the intake pressure is larger than supercharge pressure, controlling the electronic throttle valve to be fully opened, and carrying out the load control by adjusting the degree of the opening of the electric exhaust gas bypass valve. On the basis of an electric torque structure model, under a certain working condition, the transient response can be improved by closing the exhaust gas bypass valve preferably, and the unstable control of the torque of the turbocharged engine is avoided at the same time.

Description

technical field [0001] The invention relates to the field of new energy electric vehicles and internal combustion engines, relates to the control of a turbocharged wastegate valve, and in particular to an engine load electronic control method with an electric wastegate valve. Background technique [0002] As an environmentally friendly product with high efficiency, energy saving and high technology content, turbocharger can improve the exhaust pollution of automobile engine, improve the power and weight ratio of the engine, improve the torque characteristics of the engine, reduce fuel consumption and engine noise, etc. Advantages, in recent years, turbocharged engine technology has been more and more applied to become modern cars. [0003] The operating conditions of modern automobiles are complex, and there are high requirements for the operating conditions of the engine. It is necessary for the engine to operate in a wide speed and load range with high power and fuel econo...

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
IPC IPC(8): F02D41/14F02D41/00F02D23/00F02B37/18
CPCF02B37/18F02D41/0002F02D41/0007F02D41/1401F02D2041/001F02D2041/0022F02D2200/1004F02D2200/101F02D2200/602Y02T10/12Y02T10/40
Inventor 贾志超王永生孙珊珊向晓东
Owner CHERY AUTOMOBILE CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap