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Internally Cooled High Compression Lean-Burning Internal Combustion Engine

A technology of hydrocarbon fuels, internal combustion engines, applied in the direction of engine operation, internal combustion piston engines, adding non-fuel substances to fuel, etc.

Inactive Publication Date: 2017-06-23
NOSTRUM ENERGY PTE LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Typically an engine runs well during cold starts and high load operation, however, when running well there will be unburned fuel, wasted energy and additional air pollution
Generally, engines run most efficiently at approximately stoichiometric mixtures, however, there is a theoretical basis for efficient engine operation at greater than stoichiometric oxygen lean (lean) conditions

Method used

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  • Internally Cooled High Compression Lean-Burning Internal Combustion Engine
  • Internally Cooled High Compression Lean-Burning Internal Combustion Engine
  • Internally Cooled High Compression Lean-Burning Internal Combustion Engine

Examples

Experimental program
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Effect test

example 1

[0261] Picture 10 A graph showing the efficiency of the engine operating under various engine loads, including water injection and charge air injection pressure. Work efficiency is calculated based on the input of air / fuel and injected water as described herein. The test engine was an improved Yanmar L 100 single-cylinder diesel engine, which was coupled to a 5KW generator with a cylinder diameter of 86mm×75mm×stroke, a displacement of 435cc, and an engine compression ratio of 19:1. The engine is improved with removable plates that block airflow to facilitate research on internal cooling. Additional holes are drilled in various locations for water injectors (e.g. through commercially available fuel injectors suitable for injecting water at 80 psi) and pressure and temperature instruments. Inject air with the supercharger at the indicated pressures (e.g., 5 PSI (pounds per square inch), 10 PSI, and 15 PSI). At 300° before TDC, water injection was performed by port injection a...

example 2

[0270] Picture 11 Table 2 and Table 2 show the electrical efficiency of the engine under various engine loads and 10PSI supercharged air injection pressure, and compare the water injection internal cooling with the absence of water injection and air cooling. At 300° before TDC, water was injected at 80 psi for 3 ms. The engine speed is 6000RPM. The data in Table 2 shows that under 10 psi air injection, the use of water injection internal cooling can greatly increase efficiency. Under a 4KW engine load, the efficiency increases from 32% to 46%. Table 2 shows Picture 11 Basic data shown as well as water / fuel ratio and lambda (air-fuel ratio).

[0271] Table 2 In the presence and absence of water injection ( Picture 11 ) Test data of the engine under various loads and constant air pressure

[0272]

[0273]

[0274]

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PUM

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Abstract

An internally cooled internal combustion piston engine and method of operating a piston engine is provided, with the combination of liquid water injection, higher compression ratios than conventional engines, and leaner air fuel mixtures than conventional engines. The effective compression ratio of the engines herein is greater than 13:1. The engines may employ gasoline or natural gas and use spark ignition, or the engines may employ a diesel-type fuel and use compression ignition. The liquid water injection provides internal cooling, reducing or eliminating the heat rejection to the radiator, reduces engine knock, and reduces NOx emissions. The method of engine operation using internal cooling with liquid water injection, high compression ratio and lean air fuel mixture allow for more complete and efficient combustion and therefore better thermal efficiency as compared to conventional engines.

Description

[0001] This application entered the Chinese national phase on December 11, 2013, the PCT international application number is PCT / US2012 / 033088, the filing date is April 11, 2012, the Chinese application number is 201280028808.X, and the invention title is "Internal Cooling A divisional application of the patent application of "High compression lean combustion internal combustion engine", the entire content of which is incorporated herein by reference. [0002] Cross references to related applications [0003] According to Section 119(e) of Section 35 of the US Patent Law, this application claims priority to US Provisional Patent Application No. 61 / 474,240 filed on April 11, 2011, the disclosure of which is hereby incorporated by reference. Technical field [0004] The present disclosure relates to the field of internal combustion engines, including engines used in motor vehicles, railways, ships, airplanes, or power generation. [0005] The present disclosure relates to internal combu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02B47/02F02M25/03
CPCF02B47/02F02M25/03F02D41/1446F02D35/025F02D2200/0406F02D2200/0414F01P2003/001F02D41/0025Y02T10/12F02D41/1441F02D41/3094F02M25/028F02M25/035F02M25/022F02M25/025F01P3/00
Inventor 尼马尔·穆利
Owner NOSTRUM ENERGY PTE LTD
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