How to feel “ pulse “ at the diesel?
the Number of cars per capita promptly grow in Russia. Someone buys a new car, someone three - five-year-old, to someone on a pocket the razvalyushka which was only very in the use. But generally they are united by one: the vast majority of cars - petrol. The private trader belongs to diesel engines watchfully, considering that the diesel is more difficult in operation, diagnostics and repair. Actually, the number of the various settings influencing high-quality operation of the engine, and also quantity of probable malfunctions on the diesel engine many times is less, than at petrol fellows.
For a start there is a little theory.
“ Heart “ the diesel - the fuel pump of a high pressure (FPHP). If on diesels of trucks, locomotives and motor ships greasing of a fuel lath and plunger couples of TNVD is carried out by engine oil, then in automobile cars a " greasing role; hearts “ carries out fuel. Therefore “ to dry “ it is on the way fraught: gaps of plunger couples are measured in microns, and, having lost greasing, TNVD fails, gets jammed. Pressure of opening of nozzles varies on different models of diesels from 150 - ti to 300 kgfs / sq. cm (15 - 30 MPas). The difference in pressure of opening should not exceed 3 - x percent; the more precisely nozzles are adjusted - the more exactly the engine works, and the fuel consumption is less. TNVD, naturally, is obliged even to give bigger pressure at single turns of the engine. Surplus of the fuel which did not get to the cylinder on the cut-off pipeline (or obratka - as it is pleasant to whom) comes back to a fuel tank with a pressure, slightly bigger, than atmospheric. From a fuel tank to TNVD, through a pomp of pumping and the fuel filter, diesel fuel goes under pressure of about 0,9 - 0,95 atmospheric (the small vacuum is created by TNVD).
We pass to diagnostics (we mean that the valve, and also a corner of an advancing of ignition are adjusted correctly).
1. The engine is started, but on single turns becomes deaf. Reason one: air suction. Where to look for? Only on a site from a fuel tank to TNVD. Smudges of fuel will not be as on this site (you remember?) small depression; most often the suction of air is found in places of accession of tubes to a pomp and the filter, copper or aluminum laying in this case will be black. Repair - replacement of laying.
2. The engine is not started. As!? Still yesterday everything turned, fuels a full tank … Reason one: the fuel filter got littered. You will guess what is required to be made?
3. Sharply fuel consumption increased. Reason one: one of fuel tubes was worn out. If it is a tube of a high pressure - only replacement. If low - can be repaired by means of a piece of rubber and the buckle.
4. We check pulse. Put fingers on one of tubes of a high pressure. You feel uniform pushes? It “ arterial “ diesel pressure. On all tubes pushes have to be approximately equal force. If at least on one of them “ pulse “ more weakly - it is time to regulate nozzles. “ Pulse “ is absent absolutely? Jammed a needle of a nozzle in open or half-open situation. And if a tube at the same time hot - jammed the nozzle corresponding to it in a closed position.
Here, generally, and all simple diagnostics. As you can see, the beginner " also will cope with these procedures; nurse “. Health to you and your iron friends, misters motorists!