Dual-fuel ignition chamber type two-stroke engine based on reformed gas and combustion control method

A technology of ignition chamber and reformed gas, which is applied in engine control, combustion engine, internal combustion piston engine, etc. It can solve the problems of limiting engine performance improvement, difficult reliable control, and small working range, so as to improve ignition performance and clean it efficiently burning effect

Inactive Publication Date: 2020-02-21
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the ignition timing of premixed compression ignition is affected by environmental conditions and engine operating conditions, so it is difficult to control reliably
In addition, its operating range is small, cold start and low load will produce too much HC and CO, and high load will cause knocking
[0004] It is difficult for a single-fuel engine to meet the needs of energy diversification, and the combustion characteristics of a single fuel are limited, which limits the performance improvement of the engine

Method used

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  • Dual-fuel ignition chamber type two-stroke engine based on reformed gas and combustion control method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Such as figure 1As shown, the engine includes a scavenging port 1, an exhaust port 2 and a combustion chamber 3, and is characterized in that: the cylinder head first main fuel nozzle 6 is set on the cylinder head and / or the cylinder liner first main fuel nozzle 6 is set on the cylinder liner Nozzle 4, the second main fuel nozzle 7 of the cylinder head is set on the cylinder head and / or the second main fuel nozzle 5 of the cylinder liner is set on the cylinder liner; the ignition chamber 8 is set on the cylinder head, and the ignition chamber is set on the ignition chamber 8 Reformed gas nozzle 9 and spark plug 10, the ignition chamber 8 is connected to the combustion chamber 3 through a channel; or a cylinder liner reformed gas nozzle 11 is provided on the cylinder liner; the ignition mode of the engine is that the spark plug 10 ignites the ignition chamber 8 The internally reformed gas and the flame jet rich in active radicals are sprayed into the combustion chamber 3...

Embodiment 2

[0046] Embodiment 2: The difference from Embodiment 1 is that the first main fuel nozzle 4 of the cylinder liner is reduced, and the injection is made through the first main fuel nozzle 6 of the cylinder head, the second main fuel nozzle 7 of the cylinder head and the second main fuel nozzle 5 of the cylinder liner The main fuel is mixed with reformed gas to achieve efficient and clean combustion.

Embodiment 3

[0047] Embodiment 3: The difference from Embodiment 1 is that the first main fuel nozzle 6 of the cylinder head is reduced, and the injection is made through the first main fuel nozzle 4 of the cylinder liner, the second main fuel nozzle 5 of the cylinder liner and the second main fuel nozzle 7 of the cylinder head The main fuel is mixed with reformed gas to achieve efficient and clean combustion.

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PUM

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Abstract

The invention provides a dual-fuel ignition chamber type two-stroke engine based on reformed gas and a combustion control method, and belongs to the field of combustion in internal combustion engines.A cylinder cover is provided with first cylinder cover main fuel nozzles and / or a cylinder sleeve is provided with first cylinder sleeve main fuel nozzles; the cylinder cover is provided with secondcylinder cover main fuel nozzles and / or the cylinder sleeve is provided with second cylinder sleeve main fuel nozzles; the cylinder cover is provided with an ignition chamber, and the ignition chamberis provided with a reformed gas nozzle and a spark plug; or the cylinder sleeve is provided with a reformed gas nozzle. The ignition chamber is connected with a combustion chamber through a channel,and after the spark plug ignites mixed gas in the ignition chamber, the engine is triggered to burn by a flame jet. In the state that both the cylinder cover and the cylinder sleeve are provided withthe main fuel nozzles, under a low load, the cylinder cover main fuel nozzles are used for supplying fuel to improve the heat efficiency; under a medium load, the cylinder sleeve main fuel nozzles areused for supplying fuel to reduce the generation of NOx; and under a high load, both the cylinder sleeve main fuel nozzles and the cylinder cover main fuel nozzles are used for supplying fuel to control knocking. Efficient and clean combustion under all operating conditions is achieved.

Description

technical field [0001] The present invention relates to the technical field of internal combustion engine combustion, in particular to a reformed gas-based dual-fuel ignition chamber two-stroke engine and a combustion control method. Background technique [0002] In order to reduce emissions, the application of hydrogen-doped combustion technology on two-stroke engines can improve the performance and emissions of the engine, mainly because its combustion flame spreads quickly, promotes the full combustion of fuel, improves thermal efficiency, reduces unburned products, and has a low ignition temperature. Can improve the cold start of the engine. However, the production cost and storage of hydrogen are currently a difficulty for engines. [0003] Energy and environmental issues are becoming more and more prominent. The low-temperature combustion of premixed compression ignition can improve the thermal efficiency of the engine and reduce NOx emissions. However, the ignition ...

Claims

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Application Information

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IPC IPC(8): F02B69/04F02D19/08F02M39/00F02F1/24F02F1/00
CPCF02B69/04F02D19/08F02F1/004F02F1/242F02M39/00
Inventor 隆武强王洋田华崔靖晨曹建林张恒
Owner DALIAN UNIV OF TECH
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