For the quantification and validation of scum hole geometries in relation to the spray behaviour under the consideration of comparable engine operating conditions an analysis system is necessary. The gas density in the engine has the biggest influence on the ray propagation. Shortly before the combustion and with different engine load spots the gas density in the engine should correspond with the gas density in the high-pressure chamber.

The GFH GmbH company provides a high-pressure chamber (safety standards authority taken) to its customers, with adjusts a controlled internal pressure in the chamber with a pressure range of 1 … 60 bar and a constant inside temperature in the chamber (293 K +/-1 K). Nitrogen is used as filling medium. In addition to the security-relevant aspects it also offers a very good affined image of the ray geometry.

The high-pressure chambers are equipped with equivalent rectangular 200*200mm² visible surfaces to log the complete spray and to measure it. Furthermore the admission of the injector can be turned continuous 360 °around. The injection angle of the nozzles which has to be examined is illustrated in a device for the desired admission angle. Any imaginable spray geometry can be optimally collected because of the visible surfaces fixed on three sides.

For the triggering and the supply unit of the injection components a steady pressure source - with a pressure range of 1 … 300bar by a maximum flow range of 25 l / min and a common rail system - is available.

All specifications of the high-pressure chamber are provided by customer request.

Possible system specifications:

secification	condomain
	general	special
pressure range of the chamber::	1…150 bar	1…60 bar
pressure stability:	+/- 1 bar	+/- 1 bar
temprature range:	288…600 K	293 K
temprature stability:	+/- 1 K	+/- 1 K
chamber volume:	bis 33 l	33 l
visible surface amplitude:	bis 200*200 mm²	200*200 mm²
visible surface mould:	/
options:
- chamber tempering from the outside:(1)	X	X
- quick access to the chamber:	X	X
- high pressure supply unit:	X
- camera system:	X
- light source (laser/stroposcope):	X
- interpretation software customized:	X
- vibration-isolated:	X	X
- cleaning-system (inside of the inspection   glass):	X
(1) necessary for extreme ambient temperature conditions

Für kundenspezifische Applikationen kann eine individuelle Anpassung des Systems erfolgen. Für Fragen steht Ihnen das GFH Team jederzeit zur Verfügung.