Fuel pump dispensing volume adjustment and the reasons for the uneven distribution

Abstract of oil in the fuel pump test rig adjustments, installed after the uneven distribution of oil; main reason is the use of debugging state and the different conditions, the existence of debugging supply imbalance, mechanical wear and tear, the Oil valve spring failure; fuel pump installed after adjustment method.

Key words: for further adjustment of fuel pump oil supply advance angle
CLC U262.11 code B

Diesel fuel injection pump is an important component of the supply system, usually in the pilot stage of adjustment after the supply capacity use, sometimes even such a power shortage, smoky exhaust, speed instability of the unusual circumstances. Debugging was mainly due to the fuel pump and the actual supply of oil into the cylinder and the cylinder or inconsistent supply of heterogeneity caused by the direct impact of the diesel engine power, economy and reliability.
First, the reasons for the uneven supply fuel pump
1. Debug state and the different conditions of use
Fuel pump is in the test stand at room temperature for debugging, and the installed capacity is the use of compression in the cylinder end, the cylinder temperature of 500 to 700 , 3 to 5 MPa pressure under the conditions of use, the difference is greater. Locomotive operation, the fuel pump and injector temperature reached 90 , causing diesel will decrease the viscosity, thus plunger and the needle-and the leakage increased to fuel more than debugging. According to the determination of the actual injection pump the fuel is injected into the cylinder test rig commissioning of only about 80%, although the pump debugging staff will consider this factor, but it is impossible to accurately grasp. In addition, since the piston and the cylinder valve train wear or confined in varying degrees, the cylinder compression pressure and the temperature will be a difference. Even if the test stand debugging good fuel pump installation, use, the cylinder volume of oil will produce uneven.