Diesel fuel injection pump timing and adjustment of the timing

In order to check the fuel supply advance angle, the manufacturers in the manufacture of diesel engines, the general timing mark on the diesel engine and fuel injection pump at the corresponding position: the first sub-pump fuel injection timing mark, multi-finger injection pump coupling (Or automatic advancer) and the fuel injection pump bearing cap on the timeline, as long as the alignment of the two lines, it can be sure that the injection pump to the i-cylinder began to supply the moment; diesel fuel supply advance mark, Multi-finger flywheel housing (or on the hole) and the flywheel on the flywheel required angle of the fuel supply advance angle, the individual refers to the crankshaft front-end tape wheel and the front of the body pointer on the pointer; For multi-cylinder diesel engine, when the pointer on the corresponding angle or engraved line, and ensure that i cylinder into, exhaust valve clearance, it can be sure to unload fuel advance angle position. Injector pump and the corresponding gear meshing symbols in the overhaul of the gear meshing gears on the corresponding timing mark on it. Individual models also note the connection markings when installing the injection pump. 1, check the fuel supply timing Fuel injection pump is fixed on the diesel engine may be due to a variety of circumstances caused by the fuel is not allowed, then you need to check the timing of fuel. (A) Stop the crankshaft so that the i-cylinder piston is in the compression stroke (ie, there is a gap in the i-cylinder inlet / exhaust valve) when one cranks the crankshaft so that the fixing mark is exactly aligned with the fueling advance horn on the flywheel or crankshaft tape pulley Shake the crankshaft. (B) For timing of fueling of the first sub-pump of the fuel pump, check that the time-lag mark on the coupling (or automatic advancer) is aligned with the marking mark on the front of the casing. If the two signs just right, then the timing is correct; if the coupling has not been marked on the pump casing engraved mark, then the fuel supply time is too late; the other hand, if the coupling has exceeded the mark Pump shell engraved mark, then the fuel supply time is too early. For the coupling and the front of the casing no engraved mark, then you should remove the fuel pump i cylinder high-pressure tubing, crankshaft crankshaft, when it is about to reach the i-cylinder fuel advance angle position, to slowly crankshaft , One person staring out of the oil outlet port i cylinder oil surface, when the oil just up a move, stop cranking, check the flywheel or crankshaft tape on the advance angle of the oil supply line with its corresponding pointer on the ( For later convenience of inspection, then make a pair of timing mark on the coupling and pump casing. 2, the installation of calibration fuel supply timing Diesel overhaul and fuel pump repair after reinstallation, you must check the timing of fuel. (A) Shake the crankshaft clockwise so that the i-th cylinder piston is at the specified fueling start position before the top dead center of the compression stroke, ie, the fixed mark is aligned with the fuel advancement mark on the flywheel or crankshaft tape pulley. (B) Turn the fuel injection camshaft so that the timing markings on the fuel pump coupling (or automatic advancer) align with the engraved marks on the front of the pump housing. (C) Push in the fuel pump forward to insert and engage the lugs of the driven flange into the coupling. When tightening the two screws of the active flange and the middle flange, both flanges Plate "0" mark alignment, so that you can ensure that diesel fuel supply advance to meet the requirements. 3, adjust the timing of fuel supply When checking the timing of fuel supply, if you find the fuel supply advance angle is too small or too large, it is necessary to adjust the common methods of adjustment are: (1) Turn the pump adjustment timing gear And the spline shaft directly into the drive injection pump, mostly with the triangular plate or flange connected to the body. Triangular fixed plate and flange, respectively, there are 3 or 4 arc-shaped long hole. Use the above method to fix the fuel injection pump, if check the fuel injection timing is not allowed, simply loosen the corresponding 3 or 4 bolts, through the arc long hole, appropriate rotation of the pump body to adjust the fuel supply advance angle can be. Adjustment, the pump body against the drive wheel rotation to an angle, you can increase the fuel supply advance; such as the pump body along the drive wheel rotation can make the oil advance angle decreases. (2) Rotary pump shaft adjustment coupling-driven fuel injection pump, the connection plate has 2 arc-shaped long holes. To adjust the fuel supply advance angle, loosen the two fixing bolts on the connecting plate, and rotate the camshaft of the fuel injection pump clockwise by an angle to increase the fuel supply advance angle. When the counter rotation is rotated by one angle, Small oil advance. After adjustment, tighten the two fastening bolts on the disk can be.