The rapid transition to the use of injectionengines left their imprint on the technical requirements for the car's fuel system. The need to maintain the pressure in the fuel rail at a constant level demanded that engineers and designers create a special device responsible for this parameter. They became the fuel pressure regulator. Thanks to its inclusion in the fuel system of a modern engine, the nozzle stably and without interruption performs its main task.
Traditionally, fuel pressure is maintained atlevel in three atmospheres. Based on this figure, and make calculations of the performance of modern nozzles. In addition, the fuel pressure regulator is able to change this value depending on the indicator of the pressure level at the intake manifold. This explains the presence in its design of a special rubber hose for the removal of excess fuel back into the tank.
If we consider the classic aspirated,It is possible to trace the dependence of the amount of fuel supplied on the degree of rarefaction of air in the collector, arising as a result of the closing of the throttle valve. In a turbocharged engine, the fuel pressure regulator carefully monitors that the fuel pressure increases in proportion to the pressure generated in the intake manifold.
Often it is this link of the fuel chain in the case ofmalfunction has a profound effect on engine performance. For example, when the valve pressure regulator "does not hold", the fuel, if necessary, does not flow into the engine, but is discharged back into the tank. In addition, after the engine is shut off, the pressure in the system will instantaneously disappear, and will not remain at operating rates. We will have to drive the engine for a long time before the fuel nozzle receives enough gasoline and we hear the long-awaited rumbling of the engine.
In the "dead" state fuel pressure regulatorcreates a vehicle owner no less problems. Excess fuel has nowhere to go, except to enter the cylinders. Of course, the combustion mode is broken, and the ECU will respond to unburned gasoline. As a result, a series of signals will follow to reduce the nozzle opening time, but this will not last forever (just before the sensor goes down).
Malfunctioning fuel pressure sensor canWarn during regular maintenance of your car. When choosing a service station should pay attention to the availability of appropriate equipment. A performance test "by eye" will not give the desired results. The amount of fuel discharged from the nozzle “into the bottle” can only be judged on the efficiency of the fuel pump, but not the normal operation of the regulator. Even a master with extensive experience is not able to visually determine the normal performance of a modern car. For a full-fledged and high-quality service to their customers, the owners of the service station have to shell out for expensive equipment that not everyone does. Most repair shops continue to work in the old-fashioned way, gaining money on trifles, they not only cannot guarantee the declared quality of service, but sometimes even put it on the machines of their customers.
It does not hurt to pay attention to the qualitygasoline poured into your car tank. No one is immune from refueling at remote gas stations with questionable fuel quality. But it is not worth the risk, refer to proven refuelers, remembering the Russian proverb. So far in the domestic auto world not only greed is punishable, but also carelessness and unwillingness to delve into the basic principles of the iron horse.
