Single-cylinder direct-injection energy-saving diesel engine has the advantages of fuel-saving, water-saving, and start-up performance compared to conventional vortex diesel engines due to the use of rolling main bearings, uniquely shaped combustion chambers, porous injectors, and fuel oil that can be directly injected into the piston crown. The advantages of good and high power have become more and more widely used as supporting power for agricultural machinery. So, how can we buy a wishful single-cylinder direct injection energy-saving diesel engine? 1, according to the need to choose the type of production of direct injection of energy-saving series of diesel engine manufacturers more, the user should choose the diesel engine according to the matching requirements of their own machinery. Carefully check the model number, calibration power, and speed on the nameplate to avoid the appearance of “big horse-drawn cars†or “small horse-drawn carts†so as not to waste or affect their use. 2. Status Check (1) Appearance Check. The surface of the castings such as the body should be smooth, the sheet metal parts such as oil tanks should be smooth and smooth, the metal coating of the exposed parts must not be peeled or rusted, and the main paint surface must not have defects such as paint stripping, scratches, and flow mark ripples. Pay special attention to the fact that no part of the engine may leak oil. (2) Static inspection. Place the throttle in the parking position, depressurize with one hand, and turn the flywheel with the other hand. You should feel comfortable and free from cassettes and abnormal noise. Loosen the decompression handle and turn the flywheel with both hands. The crankshaft should feel very hard when it is turned to the compression stroke. There should be no leakage sound in the intake and exhaust passages. Before the piston has overcome the top dead center of compression, the flywheel should be reversed. Otherwise, the compression of the cylinder is poor, and the power and economy of the engine are not good. After decompression, quickly rotate the internal crankshaft and observe that the red mark in the oil pressure indicator should rise. Otherwise, it indicates that the lubricating system is not working properly and the oil pressure is insufficient. Push and pull the flywheel along the axial and longitudinal directions of the crankshaft should have no sense of clearance. Place the throttle at the fuel supply position. After decompression, turn the flywheel quickly. You should hear a crisp injection sound. Otherwise, it indicates that the fuel supply system is not working properly. (3) Dynamic inspection. Add enough diesel oil, engine oil and cooling water to start manually. The starting success rate should be above 75%. After starting the throttle, it should be sensitive when accelerating, and it should be quick when decelerating, and the speed change transition should be smooth; control the throttle well, the engine should be It can run steadily at low speed. At this time, it can count the number of engine exhausts, and there is no traveling phenomenon; it must not have black smoke, blue smoke and white smoke; the operating sound should be pure, crisp, rhythmical, without abnormal metal. Percussion sound; After running for a period of time, all oil pipe joints, shaft end oil seals, cylinder gaskets, water release switches, and cylinder head bulkheads, etc. must not have oil leakage, air leakage, or water leakage.
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