Fuel injection equipment test bench (fuel pumps, injectors)

The bench is designed for post-repair checking and adjustment of high-pressure fuel pumps and injectors of locomotive diesel engines. It determines the delivery per cycle of the pumping element, delivery uniformity, start-of-delivery angle, tightness of the plunger-and-barrel assembly and delivery valve, as well as the injector opening pressure, spray quality and injector tightness.

The pump under test is mounted on the bench plate through an adapter and coupled to the drive shaft. A variable-frequency drive sets the required camshaft speed, an electronic counter measures off the set number of cycles, and fuel delivery per cycle is measured with graduated cylinders or, in the extended configuration, with electronic flow meters. Injectors are checked at a separate station with a hand pump and high-pressure gauge; the spray is observed in a transparent chamber with lighting and fume extraction.

The bench consists of a base frame with a work plate, a drive module, a fuel tank with filtration and thermostatic control, a measuring unit and a control panel. The set of adapters and cam drives is made for the pumps of specific engine series; on request the bench is supplied with software for keeping a database of adjustment results for each pump and printing reports.