The task of the high-pressure pump used in common rail systems consists of feeding a sufficient quantity of the diesel fuelat a pressure of up to 1,600 bars to the high-pressure fuel rail. This pump is driven by the engine via a belt, chain, gear or coupling.

The demands made on the measurements are similar to those for the needle, the tolerances of the individual characteristics are tight,and some of the evaluation segments are very small. This also places high demands on the evaluation strategy chosen in order to reach the required metrological capability.

Special measuring machines for high-precision contour and form measurement meet these demands.

Measurement of injection system components using the example of nozzle needles

	MarForm MMQ 400-2	MarForm MFU 100	MarForm MFU 110WP	MarForm MMQ 100	MarSurf XR 20 with GD25 or GD25 Plus	MarSurf LD 130 UD 120	MarSurf M400	Millimar Pneumatic metrology	Precimar ULM 300	Precimar PLM 600-2
Roughness
Parallelism
Straightness
Roundness
Radial and axial runout
Angle
Diameter
Distance