PRODUCT INFORMATION
INDEX
DATE
Dep. 2
IT-G-E-30-001e B
September 2015
VENTURI TYPE CARBURATION - DESCRIPTION
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1. INTRODUCTION
A venturi-type carburation system comprises generically the following items:
-
Zero Pressure Regulator (ZPR)
-
Main Adjustment Screw (MAS)
-
Carburettor
(Mixer)
CARBURATION SYSTEM
Figure 1 Carburation system scheme
In the case of electronic regulation, for the NOX sensor control or Lambda sensor control regulation, the main
adjuxsting screw is changed by an electronic gas control valve.
In the case of electronic regulation, for the lambda close loop control regulation, the zero pressure regulator and
the main adjusting screw are changed by a gas inyecction valve.
2. ZERO PRESSURE REGULATOR (ZPR)
It is the pressure regulator's function to reduce the gas supply pressure to the carburettor inlet pressure. This type
of regulator is called "zero pressure regulator", because the regulator outlet pressure is zero or almost zero.
For the Zero Pressure Regulator setting, see document IT-G-A-30-001e
2.4.5
O&M_2.002211.810_A_10_2016
