Causes and Adjustments of Uneven Fuel Supply of Diesel Fuel Injection Pump (3)

(4) Check the fuel supply advance angle
Generally, the oil supply method can be used to check the fuel supply advance angle. The Ruian County diesel generator market is to loosen the high-pressure fuel pipe fitting of one end of the oil pump, remove the connector at the end of the fuel injector, turn the oil pipe to the horizontal position, and then tighten the oil pump. High-pressure fuel pipe fittings, Dingtao diesel generator market throttle pulled to a large position, open the decompression cradles, Dongming County, diesel generator market until the emergence of a few drops of diesel fuel at the exit of the high-pressure pipe so far. Clean the diesel at the exit of the tubing and turn the flywheel slowly. At the same time, pay attention to the observation of the oil level at the outlet of the high-pressure fuel pipe. The diesel generator market in Xinjian County will immediately stop turning the flywheel at the moment it starts moving. At this time, the engraved line on the water tank or body of the diesel generator market in Jinxian County should be aligned between 16 and 20 degrees before the top dead center of the flywheel. If there is oil spillage before the two are aligned, it means that the oil feed advance angle is too large, and the oil supply in the diesel generator market in Anyi County is too early; if it exceeds the oil spill, the feed oil advance angle is small, Yushan County The diesel generator market was late for oil.
It is worth noting that, for multi-cylinder diesel engines, a special glass tube and pointer must be installed to measure the arc length between the two marks on the fan pulley when the cylinder is compressed at TDC and when the fuel supply starts. The diesel generator market in Guangfeng County is determined. Fuel supply advance angle is correct. At the same time, it is also necessary to check if the fuel supply intervals of the individual unit pumps are the same. If they are different, the gap between the plunger and the tappet or the thickness of the gasket between the oil pump and the machine body can be adjusted. The diesel generator market in the Shanshan County makes the oil supply intermittent. Reach agreement.
When the fuel supply advance angle is too small or too large, it needs to be adjusted. The adjustment method of the fuel supply advance angle is different for different models. The new 195 and 190 diesel engines adjust the feed advance angle by increasing or decreasing the copper gasket between the fuel injection pump and the machine body. The diesel generator market in Hengfeng County will increase the supply time of gaskets later, and vice versa. In the 190-1 and 1105 diesel engines, the adjustment screw on the follower column of the injection pump is adjusted to adjust the fuel supply advance angle. When the screw is turned inside (outside), the oil supply time becomes later (early). The 4115 diesel engine changes the fuel advance angle by adjusting the relative position of the splined disk and the transmission gear of the fuel injection pump. The spline disk, together with the spline bushing of the fuel injection pump, rotates one hole clockwise, increasing the fuel feed advance by 3°. To make oil supply earlier, conversely, turning a hole counterclockwise reduces the fuel supply advance by 3°, making the oil supply time later.
After the initial adjustment above, check whether the exhaust temperature of each cylinder is the same. If the normal operation of the engine cannot be resumed, the cylinder pressure should be measured within the allowable range. If necessary, replace the piston ring or grinding valve to check the injector. The atomization condition and opening pressure are normal.