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Detroit Diesel Series 149
The Detroit Diesel 149 is a series of diesel engines by Detroit Diesel which first came out in the early 1960s.
The first configuration was a naturally aspirated 12V149 rated at about soon followed by a naturally aspirated 16V149 rated at about . As manufacturers in the marine, construction, mining, and many other industries required more power output, Detroit added turbocharging and intercooling to the engine. Over a period of time, Detroit Diesel continued to further the design of the engine. They finally brought the engine up to per cylinder and torque per cylinder; needless to say, this is a considerable amount of power coming from per cylinder. Much of this increase in power could be contributed to DDEC III (the third generation of Detroit Diesel Electronic Controls) electronics, thermal barrier (ceramic) coating of piston domes & fire deck, by-pass valve controlled blowers and Separate Circuit Charge Cooling (SCCC) system.
==Configurations==
The engine is available in V-8, V-12, V-16, and V-20 configurations; using the alphanumeric nomenclature utilized by Detroit Diesel, these engines were known as the 8V149, 12V149, 16V149, and 20V149. The first number indicates the number of cylinders per engine, the "V" indicates a V-type cylinder arrangement, and the last set of numbers indicates the series of the engine. Suffixes are commonplace with Detroit Diesel model designations: "T" means the engine is equipped with turbochargers, "I" for intercoolers, and "B" for by-pass Roots-type blowers. For example, a model discussed later in the article is a 20V149 TIB; it has 20 cylinders in a V-type configuration, is a series 149 engine, and is turbocharged, intercooled, and has by-pass blowers. One of the unique features of the 149 engine is its 5¾-inch bore x 5¾-inch stroke; hence, it is known as a square bore design. It has a relatively high power-to-weight ratio. The 20V149 TIB DDEC III SCCC in stand-by generator spec has an output of from a capacity of .
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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