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Diesel engines exist modification turbocharged and without, V-shaped, 236 (six-cylinder), 238 (eight cylinder) four-stroke cycle, installed in heavy vehicles ( "KAMAZ", "Ural", "KRAZ" "MAZ" et al.), the tractor (K-700), armored personnel carriers, builds. technique, and so on. d .. Also in this family is 240 (with twelve cylinders). In basic versions turbocharging not installed.
The power supply system is represented by a mechanical performance of the injection pump, with a pump section for each cylinder, direct-injection. It is situated in the collapse of the cylinder block. inlet conduits are also in the disintegration unit. Valve gear OHV, valves are in the head and are driven via rocker arms and the rods of the lower camshaft arranged above the crankshaft and driven by two gears located at the front end of the engine and closed lid. Number of valves per cylinder - 2 rods with roller tappets. On the crankshaft crankpins are placed at 90 ° in the case of YaMZ 238, and 120 ° in the case of YaMZ-236, which gives uniform flash every 90 ° to 238 motor, but uneven (at 90 ° and 150 °) 236 motor. The connecting rods are biased. The engine is cooled by liquid method. Cylinder liners of cast iron high strength. All valves are supplied with 2 springs. By means of the lock plate spring Comm. with the valve, thereby ensuring its rotation during the operation of a diesel engine.
Camshaft stamped from steel, the movement of the jaws, the individual performance of each of the valves, as rods with roller tappets. Crankshaft produce steel with the method of hot stamping. The first and fourth cranks are angled 180 ° in a plane perpendicular to the cat-th to second and third planes that are offset relative to each other is also 180 °. Pump six/eight-piston, is located between the cylinder banks. Drive - centrifugal clutch with autoregulation fuel injection timing. All plungers are arranged in-line manner. Pistons 4 kolechnye, cast aluminum alloy with high silicon content.
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