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For example, if the static compression ratio is 10:1, and the dynamic compression ratio is 7.5:1, a useful value for cylinder pressure would be 7.5 1.3 × atmospheric pressure, or 13.7 bar (relative to atmospheric pressure). The two corrections for dynamic compression ratio affect cylinder pressure in opposite directions, but not in equal strength.
The Japanese version, which has a higher compression ratio, is capable of 247 bhp (184 kW; 250 PS) at 8,600 rpm. Honda's F20C Engine won a spot on Wards' 10 Best Engines List twice, in 2000 and 2001. The engine displaces 2.0 L; 121.9 cu in (1,997 cc), lending to the Honda S2000's name.
Its largest 14-cylinder version is 13.5 meters high, 26.59 meters long, weighs over 2,300 tonnes, and produces 80.08 megawatts. The engine is the largest reciprocating engine in the world. The 14-cylinder version first entered commercial service in September 2006 aboard the Emma Mærsk .
Very high compression-moderated Atkinson cycle engine. Longer stroke to bore ratio (under-square design). Change of port end shape and expansion of seat inner diameter. Application of updated D-4S (multi-hole injector) system to achieve "high-speed combustion", resulting in thermal efficiency over 40%.
Most petrol (gasoline, Otto cycle) and diesel (Diesel cycle) engines have an expansion ratio equal to the compression ratio. Some engines, which use the Atkinson cycle or the Miller cycle achieve increased efficiency by having an expansion ratio larger than the compression ratio. Diesel engines have a compression/expansion ratio between 14:1 ...
The engine can produce any compression ratio from 8:1 to 14:1. The highest torque is achieved at 8:1, giving high acceleration, while the best gas mileage (fuel efficiency) is achieved at 14:1. The electronic engine controller responds to the pressure on the gas pedal, in real-time, altering the compression ratio seamlessly.
Two-barrel carburetion was standard; all high performance 324s came with four-barrel carburetors. The 324 was shared with GMC trucks. The 1954 88 and Super 88 V8s used an 8.25:1 compression ratio for 170 and 185 hp (127 and 138 kW) and 295 and 300 lb⋅ft (400 and 407 N⋅m), respectively.
1952 Shell Oil film showing the development of the diesel engine from 1877. The diesel engine, named after the German engineer Rudolf Diesel, is an internal combustion engine in which ignition of diesel fuel is caused by the elevated temperature of the air in the cylinder due to mechanical compression; thus, the diesel engine is called a compression-ignition engine (CI engine).