Technical information
23
Gas pressure regulator, zero pressure regulator, (3)
Function
Reducing the gas pressure (low pressure) fluctuating at the gas station inlet within
acceptable limits to zero pressure.
Negative-pressure-controlled gas metering for the venturi in the gas mixer as a function
of engine load, i.e. the gas/air mixture produced in the venturi is maintained practically
constant at constant speed over the full load range (idling to full load).
Note:
Before installing the metal hose between the gas station and the gas mixer, adjust the
main spring in the gas pressure regulator dome at the top so that, with the gas lock open
and the engine stationary, the regulator valve will just remain closed.
Negative opening pressure of gas pressure regulator 0.5 mbar.
The equalizing line (compensating line) provided between the gas pressure regulator and
the air inlet manifold (after paper air cleaner) serves to limit the gas flow admitted to the
gas mixer, in spite of any increased negative pressure in the suction line due to clogging
of the paper air cleaner, in order to prevent an increase in engine output above the safe
limit.
3/2-way solenoid valve (4)
For reliable starting of the engine – especially under conditions where the starting speed
has dropped due to aged starter batteries – we strongly recommend the use of the
3/2-way solenoid valve to bypass the air cleaner compensation during the starting phase
and at idling (for synchronizing the generator).
Metal hose with DVGW (German Association for Gas and Water) type test to connect the
gas regulating station installed in the engine room with the gas mixer on the engine (5).
Installation:
Install metal hose without any twist.
The main directions of movements due to engine vibrations about the crankshaft axis
and the 90° metal hose bend should be in one plane in order to prevent detrimental tor-
sional stresses.
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