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Method for igniting natural gas by polyoxymethylene dimethyl ethers and application

A technology of polyoxymethylene dimethyl ether and natural gas, which is applied in electrical control, combustion engine, fuel injection control, etc., can solve problems such as unreported natural gas technical solutions, and achieve the improvement of cetane number and oxygen content, Effect of lowering combustion temperature and reducing exhaust gas emission

Inactive Publication Date: 2016-12-07
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, there is no report on the technical scheme of igniting natural gas with polyoxymethylene dimethyl ether as the ignition fuel

Method used

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  • Method for igniting natural gas by polyoxymethylene dimethyl ethers and application
  • Method for igniting natural gas by polyoxymethylene dimethyl ethers and application
  • Method for igniting natural gas by polyoxymethylene dimethyl ethers and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The test adopts a single injection strategy, and the specific working conditions of the dual-fuel engine are shown in Table 3:

[0028] Table 3: Specific working conditions

[0029] parameter

value

Rotating speed

1000rpm

load

4bar IMEP

natural gas substitution rate

60％

EGR rate

0

Intake pressure

1.2 bar

gas injection moment

350°CA BTDC

pilot fuel injection timing

25°CA BTDC

[0030] The test results obtained from the test are shown in Table 4:

[0031] Table 4: Test results of test example 1

[0032]

[0033]

[0034] After testing, after applying the combustion mode described in the present invention, under the same working conditions, compared with the traditional diesel combustion mode of igniting natural gas, CO, THC and NOx emissions are respectively reduced by 26.2%, 33.6% and 76.0%, Indicating a 7.2% increase in thermal efficiency.

Embodiment 2

[0036] The test adopts two injection strategies, and the specific working conditions of the dual-fuel engine are shown in Table 5:

[0037] Table 5: Specific working conditions

[0038] parameter

value

Rotating speed

1000rpm

load

12bar IMEP

natural gas substitution rate

80％

EGR rate

0

Intake pressure

1.0 bar

gas injection moment

350°CA BTDC

pilot fuel first injection

10°CA BTDC

pilot fuel second injection

0°CA BTDC

[0039] The test results obtained from the test are shown in Table 6:

[0040] Table 6: Test results of test example 2

[0041]

[0042] After testing, after applying the combustion mode described in the present invention, under the same working conditions, compared with the traditional combustion mode of diesel igniting natural gas, CO, THC and emissions are respectively reduced by 40.7%, 21.3%, and NOx emissions are slightly reduced. increased, indicating ...

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PUM

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Abstract

The invention relates to a method for igniting natural gas by polyoxymethylene dimethyl ethers (PODE). The method takes PODE as a fuel to ignite natural gas. As PODE replaces diesel to serve as the ignition fuel to ignite natural gas, the cetane number and the oxygen content of the ignition fuel are improved, the ignitability of the ignition fuel is improved, emission of both THC and CO is reduced, the problem of instable ignition under certain working conditions is solved, and particle emission is further reduced. Meanwhile, PODE has favorable volatility and can be better mixed with air, the combustion temperature can be reduced together with specific control strategies, the emission of NOx is reduced, and excellent technical effects can be achieved without adding other ingredients or assistants. The technical scheme provided by the invention has a series of environmental protection characteristics, such as sufficient combustion and waste gas emission reduction, and can be directly applied to natural gas dual-fuel engines.

Description

technical field [0001] The invention relates to the fields of internal combustion engines and clean energy, in particular to the application of polyoxymethylene dimethyl ether in natural gas dual-fuel engines. Background technique [0002] Natural gas is a gaseous fuel with a higher hydrogen-to-carbon ratio and lower CO2 than traditional petroleum fuels 2 and particulate emissions. Diesel-ignited natural gas dual-fuel engine has high thermal efficiency and is a very promising vehicle natural gas technology solution. However, the biggest challenge in the field of emission reduction is THC and CO emissions. High cetane number, high content Pilot fuel with oxygen content instead of diesel is an effective means to reduce THC and CO emissions, and can further reduce particulate matter emissions. [0003] Polyoxymethylene dimethyl ether is a new type of coal-based fuel, which has been industrially produced in large quantities. Compared with diesel oil, polyoxymethylene dimethyl ...

Claims

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Application Information

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IPC IPC(8): F02D19/06F02D41/00
CPCF02D19/0647F02D41/0025Y02T10/30
Inventor 王志宋和平何鑫帅石金王建昕
Owner TSINGHUA UNIV
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