Compression ignition

The engine was the first to incorporate compression ignition of alcohols (7). Low cetane fuels can autoignite, however, provided the in-cylinder temperature is high enough and fuel injection correcdy timed. This compression ignition works for methanol as well as ethanol and gasoline. 

Some of the tests and criterion used to define fire resistance may be found in the Hterature (9). Additionally, the compression—ignition and hot manifold tests as defined in MIL-H-19457 and MIL-H-5606, respectively the Wick test as defined by Federal Standards 791, Method 352 flash point and fire point as defined in ASTM D92 autoignition temperature as defined in ASTM D2155 and linear flame propagation rate are defined in ASTM D5306 are used. 

There are several important Hquid fuels, ranging from volatile fuels for internal combustion engines to heavy hydrocarbon fractions, sold commercially as fuel oils. The technology for the combustion of Hquid fuels for spark-ignition and compression-ignition internal combustion engines is not described here. 

Compression ignition engine Designed, constructed and equipped to protect explosive from external hazards and weather Closed or securely sheeted Trailers to be adequately braked or restrained upon detachment from towing vehicle... 

Rudolf Diesel First compression-ignition internal freight locomotive Demonstrator... 

Compression-ignition, or diesel cycle engine, which is fueled by a diesel oil and air mixture. 

In the compression ignition cycle, the air is compressed and the fuel is injected into the compressed air at a temperature sufficiently high to spontaneously ignite the fuel. The heat released is converted to mechanical work by expansion within each cylinder and, by means of the reciprocating motion of the piston, is converted to rotary motion at the crankshaft. 

The overall efficiency of a compression ignition engine depends on the type, but ranges from 30 to 40 per cent. 

System Spark ignition Compression ignition Gas turbine... 

Electricity works (excluding compression-ignition engines burning distillate fuel with a sulfur content of <1 per cent) ... 

Much work has been done on the adiabatic compression ignition of NPN vapor mixed with various gases by both NOL (Ref 2) and Brit Imp Chem Inds (Ref 4). A table of compression ratios and resultant temps from the detons of NPN vapor saturated gas mixts is presented below... 

Zhao, R, Homogeneous Charge Compression Ignition (HCCI) Engines, Warrendale, PA Society of Automotive Engineers, 2003. 

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