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

Active disturbance observation-based fuel pressure controller and control method thereof

A disturbance observer and fuel pressure technology, applied in engine control, fuel injection control, electrical control, etc., can solve problems such as performance degradation, PID controller adjustment process backward interference, system operation instability, etc., to achieve good static performance and dynamic performance, solve the problem of fluctuation tracking and compensation, and achieve the effect of rapid response

Active Publication Date: 2014-09-17
TIANJIN UNIV
View PDF6 Cites 20 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

(2) During the transient process, the fuel pressure changes sharply and frequently
Due to the complexity, time-varying and non-linear problems of the internal combustion engine fuel injection system, with the change of engine speed, load and other operating conditions, its internal parameters have changed greatly, which makes the PID control performance insufficient to compensate Changes in fuel injection system parameters lead to performance degradation and even system instability
[0014] Since the PID control always adjusts after the error has occurred, if the disturbance has occurred but no deviation occurs, the PID controller will not work and adjust, so the adjustment process of the PID controller always lags behind the disturbance, and there is a lag

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
  • Active disturbance observation-based fuel pressure controller and control method thereof
  • Active disturbance observation-based fuel pressure controller and control method thereof
  • Active disturbance observation-based fuel pressure controller and control method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0114] Such as Figure 10 As shown, the fuel pressure controller based on active disturbance observation in the present invention is the fuel pressure control effect diagram when it is actually applied in a high-pressure common rail fuel injection system of a six-cylinder diesel engine.

[0115] The six-cylinder diesel engine has a displacement of 11.596L, a rated power of 353kW (corresponding to a diesel engine speed of 2100rpm), and a maximum torque of 1973N m (corresponding to a diesel engine speed of 1200-1500rpm). rail fuel injection system, the maximum injection pressure is 180MPa.

[0116] Fuel pressure controller based on active disturbance observation, execution cycle T O is 0.008s, the observation frequency ω O 3rad / s, control frequency ω C is 18rad / s, the physical property coefficient of the fuel injection system b O for 200.

[0117] PID-based fuel pressure controller, execution cycle T O is 0.008s, proportional coefficient K P is 2, the integral coefficient...

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 an active disturbance observation-based fuel pressure control method, aims at solving the problems of time-varying characteristics and non-linearity of an internal combustion engine fuel injection system and non-ideal application of traditional PID (proportion integration differentiation) control in fuel pressure control and the like, and provides the method of realizing control on fuel pressure by adopting model-based feedforward control and state observation-based feedback control. The method mainly comprises target fuel pressure computation, fuel pressure sensor practical fuel pressure collection and computation, fuel measuring unit fuel volume flow rate feedback regulation amount computation, fuel measuring unit fuel volume flow rate feedforward control amount computation, conversion of fuel measuring unit fuel volume flow rate into current, conversion of fuel measuring unit current into a PWM (Pulse Width Modulation) duty ratio, fuel measuring unit practical work current measurement and computation, a fuel measuring unit current feedback regulator, fuel measuring unit PWM modulation frequency computation, a fuel measuring unit PWM drive, a fuel measuring unit, a fuel injection system and a fuel pressure active disturbance observer.

Description

technical field [0001] The invention belongs to the technical field of internal combustion engine control, relates to an internal combustion engine fuel injection system, and relates to a fuel pressure control method for the internal combustion engine fuel injection system, in particular to a fuel pressure control method based on active disturbance observation. Background technique [0002] The internal combustion engine is the model with the highest thermal efficiency, the best energy utilization rate, and the most energy-saving model among the various power machinery currently being industrialized. It has been widely used in power generation, irrigation, ship power, vehicle power, etc. The advantage in power is the most obvious, and the global trend of "internal combustion engine" in vehicle power has been formed. [0003] According to the different ignition methods, internal combustion engines can be divided into spark ignition engines (such as gasoline engines, that is, ...

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): F02D41/04F02D41/30F02D41/20
Inventor 谢辉凌健
Owner TIANJIN UNIV
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