Weichai Engine Injectors Often Occur Several Kinds of Faults

Fuel injector is a precision device with very high processing accuracy, which requires a large dynamic flow range, strong anti-clogging and anti-pollution ability and good atomization performance. When weichai engine parts have problems, will affect its normal work, this article will introduce you to weichai engine injector often occur several kinds of failure and its adverse effects.

(1) Poor atomization of oil injection. When the injection pressure is too low, the spring end face wear or spring elasticity decline, will make the injector early opening, delayed closure, and poor atomization of the injection phenomenon, resulting in a decline in diesel engine power, combustion is not sufficient and black smoke from the exhaust pipe.

(2) Seal failure, exhaust white smoke and accompanied by the sound of discharge. Injector work, the needle valve body sealing cone due to the needle valve frequent strong impact and abrasive wear, the cone surface will gradually appear scratches or pitting, with the cone contact width increases, resulting in sealing failure, so that the injector dripping oil. When the temperature of the diesel engine is low, the exhaust pipe has a white smoke phenomenon; when the temperature of the diesel engine is high, the exhaust pipe in addition to black smoke, but also from time to time issued by the discharge sound. At this time, if you stop supplying oil to the cylinder, the smoke and the sound of the cannon quickly disappear.

(3) Needle valve stuck, can not inject fuel. Excessive moisture or acid in the diesel fuel will make the needle valve stuck due to corrosion; when the needle valve sealing cone surface is damaged, the combustible mixture in the cylinder will also be flushed into the surface and the formation of carbon deposits, so that the needle valve is stuck, the injector can not be injected, resulting in the cylinder to stop working.

(4) Internal leakage, long injection time, starting difficulties. When the needle valve in the needle valve hole for frequent reciprocating motion, if the impurities in the diesel fuel particle diameter is too large, it will make the needle valve hole guiding surface gradually wear out, resulting in increased leakage of injectors, pressure drop and prolonged injection time, resulting in the diesel engine startup difficulties, vibration increases when working.

(5) Injector and cylinder head combined hole leakage, oil. If the injector in the cylinder head mounting holes in the carbon, copper gasket is not intact, uneven, asbestos or other materials instead of copper, or the thickness of the gasket can not ensure that the injector extends out of the cylinder head plane, will result in poor heat dissipation or can not play a role in sealing, resulting in the combination of the injector and the cylinder head holes of air leakage, run-off oil.

(6) Black smoke. As a result of high-pressure diesel fuel is constantly sprayed, the injector nozzle holes will be gradually worn and increased, resulting in a drop in injection pressure, shortening the injection distance and uneven mixing of combustible mixtures, so that the diesel engine appeared to smoke phenomenon, the carbon in the cylinder will also increase.

Weichai engine parts failures require prompt repair and replacement of the relevant parts.Keluo Construction Machinery is a trustworthy company with strict adherence to European standards and German quality.Whether you need injectors, cylinder heads, cylinder blocks, cylinder liners, pistons, camshafts, oil pumps, generators, water pumps, air compressors, fuel injectors or fan oil seal gaskets.We are all able to meet your needs. In addition, Coro has established good cooperation with customers all over the world, not only because we have been deeply cultivating in this industry for more than twenty years and have rich experience in production, but also because of the good quality of our products and after-sales service. If you want to buy related products, we will be your best partner.