Unlock instant, AI-driven research and patent intelligence for your innovation.

Internally cooled high compression lean-burning internal combustion engine

A technology of internal combustion engine and compression ratio, applied in combustion engine, internal combustion piston engine, liquid cooling, etc.

Active Publication Date: 2014-02-19
NOSTRUM ENERGY PTE LTD
View PDF8 Cites 15 Cited by
  • 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 operate 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

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
  • 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
Comparison scheme
Effect test

example 1

[0126] Figure 10 A graph showing engine efficiency operating at various engine loads, including water injection and charge air injection pressures. Operating efficiencies are calculated based on air / fuel and injected water inputs as described herein. The test engine was a modified Yanmar L100 single cylinder diesel engine coupled to a 5KW generator with a bore x stroke of 86mm x 75mm, a displacement of 435cc, and an engine compression ratio of 19:1. The engine was modified with a removable plate that blocked the airflow to facilitate the study of internal cooling. Additional holes were drilled in various locations for water injectors (eg, through commercially available fuel injectors adapted to inject water at 80 psi), and pressure and temperature instrumentation. Inject air with the super booster at the pressure indicated (eg 5PSI (pounds per square inch), 10PSI and 15PSI). Water injection was performed by port injection at 80 psi for 3 ms at 300° before TDC. The engine ...

example 2

[0135] Figure 11 and Table 2 shows the electrical efficiency of the engine at various engine loads and 10 PSI charge air injection pressure, comparing water injected internal cooling with the absence of water injection and air cooling. Water was injected at 80 psi for 3 ms at 300° before TDC. The engine speed is 6000RPM. The data in Table 2 show that at 10 psi air injection, the use of water injection internal cooling can greatly increase efficiency. At 4KW engine load, the efficiency increased from 32% to 46%. Table 2 shows Figure 11 Base data shown along with water / fuel ratio and lambda (air-fuel ratio).

[0136] Table 2 In the presence and absence of water injection ( Figure 11 ) data from tests on the engine under various loads and constant air pressure

[0137]

[0138]

[0139]

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

No PUM Login to View More

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] Cross References to Related Applications [0002] This application claims priority under Section 35, Section 119(e) of the US Patent Act to US Provisional Patent Application Serial No. 61 / 474,240, filed April 11, 2011, the disclosure of which is hereby incorporated by reference in its entirety. Background technique [0003] The present disclosure relates to the field of internal combustion engines, including engines used in motor vehicles, railways, ships, aircraft or power generation. [0004] The present disclosure relates to internal combustion engines that operate more efficiently than conventional engines. The principles set forth herein can be used in spark ignition (SI) engines, typically running on gasoline (gasoline), ethanol, or natural gas, or on compression ignition engines, typically diesel engines. [0005] The engine literature describes many factors that affect engine efficiency. These factors can be divided into theoretical constraints based on the se...

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
IPC IPC(8): F02B47/02
CPCY02T10/121F02M25/03F02B47/02Y02T10/16F02D41/1446F02D35/025F02D2200/0406F02D2200/0414F01P2003/001F02D41/0025Y02T10/12F02D41/1441F02D41/3094F02M25/028F02M25/035F02M25/022F02M25/025F01P3/00
Inventor 尼马尔·穆利
Owner NOSTRUM ENERGY PTE LTD