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Dual-fuel ignition chamber type two-stroke engine and combustion control method

An ignition chamber and engine technology, which is applied in engine control, combustion engine, fuel injection control, etc., can solve problems such as difficult and reliable control, limit engine performance improvement, and small working range, so as to achieve efficient and clean combustion and improve ignition performance 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 and combustion control method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] like figure 1 As shown, a dual-fuel ignition chamber type two-stroke engine includes a scavenging port 1, an exhaust port 2 and a combustion chamber 3, and the first main fuel nozzle 6 of the cylinder head is arranged on the cylinder head and / or the cylinder is arranged on the cylinder liner Set the first main fuel nozzle 4, set the cylinder head second main fuel nozzle 7 on the cylinder head and / or set the cylinder liner second main fuel nozzle 5 on the cylinder liner; set the ignition chamber 8 on the cylinder head, in the ignition chamber 8 is provided with an ignition chamber, a second fuel nozzle 9 and a spark plug 10, and the ignition chamber 8 is connected to the combustion chamber 3 by a passage; The jet flows from the channel into the combustion chamber 3, triggering the combustion of fuel in the cylinder.

[0033] The structure of the ignition chamber 8 is designed according to the layout of the cylinder head, and the volume of the ignition chamber 8 is not g...

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 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 to achieve efficient and clean combustion.

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Abstract

The invention provides a dual-fuel ignition chamber type two-stroke engine and a combustion control method, and belongs to the field of combustion of an internal combustion engine. A first cylinder cover main fuel injection nozzle is arranged on a cylinder cover and / or a first cylinder sleeve main fuel injection nozzle is arranged on a cylinder sleeve; a second cylinder cover main fuel injection nozzle is arranged on the cylinder cover and / or a second cylinder sleeve main fuel injection nozzle is arranged on the cylinder sleeve; an ignition chamber is arranged on the cylinder cover; and a second ignition chamber fuel injection nozzle and a sparking plug are arranged on the ignition chamber. The ignition chamber is connected to a combustor through a channel; and after mixed gas in the ignition chamber is ignited by the sparking plug, the engine is triggered to be on fire in the form of flame jet flow. In the state where the main fuel injection nozzles are arranged on the cylinder coverand the cylinder sleeve at the same time, under a low load, the cylinder cover main fuel injection nozzles are used for supplying fuel so as to improve thermal efficiency; at a medium load, the cylinder sleeve main fuel injection nozzles are used for supplying fuel so as to reduce NOx generation; and at a high load, the cylinder sleeve main fuel injection nozzles and the cylinder cover main fuel injection nozzles are used for supplying fuel so as to control knockings. The high-efficiency and clean combustion in the range of all operating conditions is realized.

Description

technical field [0001] The invention relates to a dual-fuel ignition chamber type two-stroke engine and a combustion control method, belonging to the field of internal combustion engine combustion. Background technique [0002] In order to reduce emissions, efforts are currently being made to increase the leanness of the mixture in the engine cylinder, and the ignition effect of the spark plug is not good, especially with the increase of the bore diameter, the ignition effect of the spark plug is even worse. There are problems with cold start difficulties and high HC and CO emissions under low load conditions. [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 timing of premixed compression ignition is affected by environmental conditions and engine operating conditions, so it is difficul...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02B69/02F02F1/24F02F1/00F02M61/14F02B19/10F02B19/12F02D19/08F02D41/06F02D41/30F02B75/02
CPCF02B19/1019F02B19/12F02B69/02F02B2075/025F02D19/08F02D41/0025F02D41/064F02D41/3094F02F1/004F02F1/242F02M61/14Y02T10/12
Inventor 隆武强王洋崔靖晨田华曹建林张恒
Owner DALIAN UNIV OF TECH