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The main cause of Wankel Diesel engine infeasibility is the shape of the combustion chamber, located in the rotary piston. It is elongated and convex, thus not allowing a high enough compression ratio (without too much heat loss), [ 7 ] even in combination with a (solely crankshaft or exhaust gas driven) supercharger.
6.2L fitted to a 1987 HMMWV. The original 6.2 L (379 cu in) diesel V8 was introduced in 1982 for the Chevrolet C/K and was produced until 1993. The 6.2L diesel emerged as a high-fuel-economy alternative to the V8 gasoline engine lineup, and achieved better mileage than Chevrolet's 4.3L V6 gasoline engine of the 1980s, at a time when the market was focused on power rather than efficiency.
Other features included low-friction bearings for the camshaft and balancer shafts, piston rings that have less pre-tension, a two-stage oil pump with volumetric flow control. [ 6 ] [ 7 ] The engine's displacements were 1.4 litres (3 cylinders), 1.6 litres (4 cylinders) and 2.0 litres (4 cylinders), [ 8 ] [ 9 ] with power output between 66 and ...
A fundamental specification for such engines, it can be measured in two different ways. The simpler way is the static compression ratio: in a reciprocating engine, this is the ratio of the volume of the cylinder when the piston is at the bottom of its stroke to that volume when the piston is at the top of its stroke. [1]
The company sold 7,786 heavy-duty diesel engines, which were assembled approximately 80% complete in 2009, including the crankshaft, block, pistons, and connecting rods. These short block engines were stored temporarily, and the remaining assembly work was completed in early 2010 for use in trucks and buses of in model year 2010. [ 13 ]
Unlike earlier diesel engines the B-series Cummins used direct injection and did not need glow plugs for cold starting. [2] The engine was first manufactured in Rocky Mount, North Carolina, and other plants were later added in Mexico, Brazil, Turkey, and Darlington, UK. [3] It uses a gear-drive camshaft for extra reliability. Also specified is ...