Copyright © Prins Autogassystemen B.V. 2013 Page 10
The Prins filter unit
The filter unit filters the LPG/CNG and is also used to measure the gas temperature (T_gas) and gas
pressure (Psys) in the VSI system, by means of a combination sensor.
The filter unit has a single or a double outlet of 11mm.
Single outlet : on converted vehicle with 3-4 or 5 cylinder engines with one VSI injector rail.
Double outlet : on converted vehicle with 6 or 8 cylinder engines with two VSI injector rails.
Single outlet Double outlet
3-4-5 cylinder engine 6-8 cylinder engine
The Keihin filter unit
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