911 Turbo F6-3299cc 3.3L SOHC Turbo (1992)
Warm Up Regulator: Description and Operation
CONSTRUCTION
Control pressure regulator now incorporates a temperature switch and an altitude compensator.
Temperature Switch
OPERATION
Control pressure regulator is fitted with two heating resistors Rv1 and Rv2. They heat up a bimetal spring (1, housed in control pressure regulator),
when engine is running. Bimetal spring adjusts control pressure in fuel distributor via a valve plate. Built-in temperature switch (t), is designed to
remain open at temperatures below 59° F (15° C). This opens ground connection of resistor Rv1.
When engine is started while ambient temperature at control pressure regulator is below 59° F (15° C), voltage is applied only to resistor Rv2. This
heats bimetal spring slowly and control pressure builds gradually.
As ambient temperature rises above 59° F (15° C), temperature switch closes to ground connecting both resistors in parallel. This increases heat
output and heating efficiency. Bimetal spring now heats up faster and control pressure regulator settles more rapidly.
Control Pressure
