The composition of the system and the work of its main elements
The system contains the following component parts: Unit 4 (Fig. 212) governance
(252.3761 or 141.3733), micro (421.3709), established in
carburetor, a solenoid valve (1902.3741).
Wiring dixagram for system components, see the instructions for
operation of automobiles IL, on electrical circuits.
Operation of the control unit.
The control unit continuously monitors the speed of the crankshaft
engine by measuring the pulse repetition period of the ignition system,
which are removed from the ignition coil and fed to pin 4 of the control unit
(Green wire). The output control unit 3 serves to connect with a mass
vehicle (black wire) Pin 2 - for the supply voltage to the control unit
the nominal value of 12 V (red wire) and terminal 1 - to ensure
current flow through the solenoid coil (purple or white
When cranking speed less than 1245 min "1 (5%) and the findings of a
2 of the control unit has an electrical connection and through the winding of the electromagnetic
Valve current flows regardless of the microswitch. After increasing the frequency of
rotation to the 1500 1 \ min (5%), electrical connection terminals 1 and 2 is broken and
is restored only after reducing the speed of the crankshaft
engine to a 1245 \ minutes.
The work of the microswitch. Micro switch has break xcontacts.
When fully released throttle pedal pusher
(Button) DIP drowned and his xcontacts are open. At
Pressing the throttle pedal pusher
microswitch is released and the xcontacts are closed, and through the winding
solenoid current begins to flow, regardless of the control unit.
The work of the solenoid valve.
The solenoid valve has three nozzle and the two locking elements: the first
They worked on the opening. It serves to divide the central nozzle
(Related to the engine intake duct) on the inclined nozzle
(Associated with the fitting EPHH), the second - to close, it serves to divxigeinclined with respect to said nozzle air nozzle, closed
felt filter and placed between the electrical terminals
Thus, when current flows through the solenoid coil
central and oblique nozzles have a pneumatic connection, and in the absence
current such a connection is provided between the inclined and atmospheric nipples.
In the first case, the vacuum of the intake pipe is transferred to a membrane
mechanism EPHH carburetor and pawl EPHH not prevent the passage of
toplivovozdushnoi mixture through the engine idling, the second
case - shuts off the fuel.