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

Rotational speed control method and device for idle speed of petrol engine and working condition of small accelerator

A gasoline engine, engine speed technology, applied in engine control, machine/engine, electrical control, etc., can solve problems such as cost increase

Inactive Publication Date: 2010-10-13
ZHEJIANG FAI ELECTRONICS
View PDF2 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, adding an electronically controlled idle air valve will inevitably increase the cost, and the response speed of the idle air valve may not be able to meet the needs of rapid adjustment

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
  • Rotational speed control method and device for idle speed of petrol engine and working condition of small accelerator
  • Rotational speed control method and device for idle speed of petrol engine and working condition of small accelerator
  • Rotational speed control method and device for idle speed of petrol engine and working condition of small accelerator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0049] exist figure 1 In the shown engine system of implementing the present invention, include engine body 3, crankshaft 2, camshaft 5, throttle body 8, electric control unit (ECU) 12, ignition device 14, fuel injection device 7 and various sensors Wait. On the throttle body 8, there is a throttle plate 10 for adjusting the air intake of the engine. On the throttle plate 10, there is a non-adjustable main idle air intake hole 11, the size of which is determined according to the minimum air intake required for the stable idle speed of the engine. For example, for the motorcycle engine of 125-150cc displacement, the main idle air intake hole 11 can be designed as a circular hole of diameter 2-2.5mm; for the motorcycle engine of 50-110cc displacement, the main idle air intake hole 11 can be designed as A round hole with a diameter of 1.2-2.2mm. Of course, besides the idle air flow flowing in through the main idle air intake hole 11, a certain amount of idle air also flows thro...

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 discloses a method and a device for controlling idle speed of a petrol engine and rotational speed of a small accelerator. The device comprises an engine body, an electric control unit (ECU), a fuel injection device, an ignition device, a restrictor body and the like. The device is characterized in that: the restrictor body has nonadjustable and large enough idle speed air inlet quantity at an idle speed position; the electric control unit controls the ignition device; and the idle speed or a preset target rotational speed reached by the rotational speed of the small acceleratoris fed back and controlled through great adjustment of an ignition advance angle. The method comprises the following steps of: 1) judging a compressed expansion process or an intake / exhaust process at present; 2) giving an ignition signal in the compressed expansion process, and avoiding giving the ignition signal in the intake / exhaust process; and 3) determining the ignition advance angle according to a difference between the current measured rotational speed of the engine and the target rotational speed and a basic ignition angle.

Description

technical field [0001] The invention relates to an electronically controlled spark ignition type internal combustion engine, in particular to a commonly used electronically controlled fuel injection and ignition four-stroke gasoline engine for automobiles and motorcycles. Background technique [0002] The spark-ignition internal combustion engine adopts electronically controlled ignition technology, which can freely adapt to different requirements of ignition advance angle (sometimes referred to as ignition angle) in various working conditions, in order to achieve high efficiency, energy saving, emission reduction and other effects. Especially for gasoline engines, the use of electronically controlled fuel injection and ignition can precisely control the combustion mixture air-fuel ratio of gasoline engines, thereby greatly improving various performances of gasoline engines, including engine start performance, idling performance, and running stability. , power, fuel consumpt...

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): F02D43/00
Inventor 杨延相张平刘昌文郗大光
Owner ZHEJIANG FAI ELECTRONICS
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