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

Micro internal combustion engine self-heat-storage ignition temperature measuring method and device

A technology of ignition temperature and measurement method, applied in measuring devices, thermometers, measuring heat, etc., can solve the problems of difficult and harsh arrangement of optical windows, affecting heat storage performance, etc.

Inactive Publication Date: 2018-03-16
GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Piston model aircraft engines that have been commercially used basically adopt the self-storage heat ignition method. The micro internal combustion engine runs at a high speed, usually reaching 10,000 revolutions per minute. Difficulties in the measurement of ignition temperature and combustion process of thermal storage igniter
Existing engine ignition temperature measurement has great limitations. For example, the conventional thermocouple temperature measurement method has a long response time. At the same time, the thermocouple directly in contact with the heat storage body will affect its heat storage performance, resulting in the measured temperature and There is a large deviation in the real temperature; however, it is difficult to arrange optical windows when using optical methods, especially the conditions for optical temperature measurement on micro internal combustion engines are more stringent, and the cost of optical temperature measurement instruments is expensive

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
  • Micro internal combustion engine self-heat-storage ignition temperature measuring method and device
  • Micro internal combustion engine self-heat-storage ignition temperature measuring method and device
  • Micro internal combustion engine self-heat-storage ignition temperature measuring method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A method for measuring the self-heating ignition temperature of a miniature internal combustion engine, comprising the following steps:

[0026] 1S. In a standard heating furnace, place the thermal storage igniter as a whole in a constant temperature environment for a certain period of time, and measure the static resistance value of the heating wire of the thermal storage igniter at the corresponding temperature;

[0027] 2S. By changing the temperature of the heating furnace, the resistance change characteristics of the heat storage igniter heating wire are obtained, and a one-to-one corresponding temperature relationship chart is formed, which is prepared for calculating the temperature characteristics of the transient heating wire in the engine;

[0028] The established temperature resistance relationship is: Rx=R(T)

[0029] Among them: Rx is the resistance of the heating wire, T is the temperature of the heating furnace;

[0030] 3S. Run the internal combustion e...

Embodiment 2

[0036] like figure 1 Shown, a kind of self-heating ignition temperature measuring device of miniature internal combustion engine comprises internal combustion engine, high-speed lock-in amplifier, voltage divider Ro; The heat storage igniter heating wire in the internal combustion engine is resistance Rx to be measured; Described voltage divider Ro and The resistor Rx to be tested is connected in series, and the high-speed lock-in amplifier is connected in parallel with the voltage dividing resistor Ro and the resistor Rx to be tested respectively. The heat storage igniter heating wire is made of platinum or platinum-rhodium alloy. The voltage dividing resistor Ro is a variable resistor with a resistance range of 10-50 ohms.

Embodiment 3

[0038] The heat storage igniter heating wire is made of platinum-rhodium 30 alloy with a diameter of 0.2 mm and a resistance of 0.13 ohms at normal temperature. figure 2 Under the condition of engine running at 4000 revolutions per minute, the resistance R and temperature T of the heat storage igniter heating wire vary with time, which can reflect the periodic change law of the temperature of the engine ignition moment and the temperature in the cylinder.

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

PropertyMeasurementUnit
electrical resistanceaaaaaaaaaa
diameteraaaaaaaaaa
electrical resistanceaaaaaaaaaa
Login to View More

Abstract

The invention provides a micro internal combustion engine self-heat-storage ignition temperature measuring device, which comprises an internal combustion engine, a high-speed phase-locked amplifier and a voltage divider resistor Ro. A heating filament of a heat-storage igniter in the internal combustion engine is a resistor Rx to be measured; the voltage divider resistor Ro is connected in serieswith the resistor Rx to be measured; and the high-speed phase-locked amplifier is connected in parallel with the voltage divider resistor Ro and the resistor Rx to be measured. The heat-storage igniter heating filament is made of platinum or platinum-rhodium alloy. The voltage divider resistor Ro is a variable resistor, resistance range being 10-50 ohm. The advantages are that method and device can realize measurement by directly obtaining the voltages signals at the two ends of the heat-storage igniter in a test circuit, and can obtain resistance of the heating filament through conversion, and thus ignition temperature and dynamic change data can be obtained.

Description

technical field [0001] The invention relates to the technical field of temperature measurement, in particular to a method and device for measuring the transient temperature of a heating wire in a self-storage ignition mode of a glow plug in a continuous working mode of a miniature internal combustion engine. Background technique [0002] Internal combustion engines are mainly divided into three modes: electric spark ignition, compression ignition ignition and glow plug self-storage ignition according to different types of fuel used and different working modes. Among them, the self-storage ignition principle of the glow plug is to ignite the combustible gas in the cylinder by powering on the heating wire of the glow plug during the engine starting stage. The heat storage function is heated by the hot combustion gas in the previous cycle and maintained at a certain temperature, and the cold combustible gas is ignited in the next cycle to realize self-storage heat ignition. Si...

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): G01K7/16G01N25/12
CPCG01K7/16G01N25/12
Inventor 蒋利桥周光照赵罗光杨卫斌李萍
Owner GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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