Causes and Adjustment of Uneven Distribution of Fuel Injection Pumps (Continued)
Ningbo Wason Lighting Technology Co.,Ltd , https://www.nbwasonled.com
September 25 08:02:00, 2024
(3) When the engine temperature exceeds 50 ℃, increase the throttle, let the engine run at rated speed, at the same time check the color of the exhaust port, pay attention to listen to the sound of the cylinder. If a cylinder of black smoke, indicating the fuel supply is too large, with more mechanical equipment used in the 135 series diesel engine, for example, the pump can adjust the gear rod to the direction of stopping oil, release the locking screw on the adjustment gear , Take a thin iron rod into the hole of the oil control sleeve, tap with a hammer, turn it to the right, you can reduce the fuel supply, and vice versa increased. When a cylinder has a crisp percussion, and difficult to start, indicating the fuel supply too early; if a cylinder temperature is too high, or even a flame jet, it may be the oil supply started too late. Such as the 135 series diesel engine, each cylinder fuel supply start time adjustment, is determined by the position of the pump plunger. When the fuel supply start time is too late, the timing adjustment nut should be screwed out with some screws, the fuel supply start time is too early, then tighten the screws. (4) to check the fuel supply advance angle | MechNet | more knowledge, please visit the Chinese machinery expert network, the general oil spill method can be used to check the fuel supply advance angle, the pump will be a high-pressure pipe fittings loose, will connect the injector end Of the connector removed, the tubing turned to the horizontal position, and then tighten the pump high-pressure hose connector, the throttle pulled to the maximum position, open the decompression of the car until the outlet of high-pressure pipe a few drops of diesel emerge. Wipe the diesel at the exit of the tubing and turn the flywheel slowly. At the same time pay attention to observe the high-pressure tubing at the exit of the oil surface, at the beginning of the moment it started to stop rotating flywheel. At this point, the engraving of the tank or the body should be aligned in the flywheel top dead center between 16 ~ 20 °. If the two have been in alignment before the oil spilled, indicating too much fuel advance angle, oil supply too early; if more than an oil spilled, indicating the fuel supply angle is too small, too late. It is noteworthy that, for multi-cylinder diesel engine, the need to install a dedicated glass tube and the pointer to measure the first cylinder compression top dead center and start the fan on the fan when the supply of fuel The arc length between the two marks to determine whether the fuel supply advance angle is correct. At the same time also check each monomer pump intermittent fuel supply is the same, if different, can adjust the gap between the plunger and tappet or gasket between the pump and the body thickness, so that the oil interval to achieve the same. When the fuel supply advance angle is too small or too large, it needs to be adjusted. Different types of fuel supply advance angle adjustment methods are different. The new 195 and 190 diesel engine, is through the increase and decrease of the copper gasket between the pump and the body to adjust the fuel supply advance angle. Increasing gasket supply time becomes late, otherwise it is earlier. 190-1 and 1105 diesel engine is to adjust the adjustment screw on the fuel injection pump servo column to adjust the fuel supply advance angle, screw in (outside), the oil supply time becomes late (early). 4115 diesel engine is by adjusting the relative position of the spline access plate and the injection pump gear to change the fuel supply advance angle, spline dial with the fuel pump spline sleeve turn a hole clockwise, the fuel supply advance angle increased by 3 ° , So that oil supply earlier, on the contrary, turning a hole counterclockwise, the fuel supply advance angle reduced 3 °, so that the oil supply time becomes late. After the above initial adjustment, check the exhaust temperature of each cylinder is consistent, if you can not restore the normal work of the engine, you should measure the cylinder pressure is within the allowed range, if necessary, replace the piston ring or grinding valve, check the injector The atomization situation and the opening pressure is normal.