188.8.131.52. EPHH control unit
On the engine of fashion. 2106 the 25.3761 or 2533.3761 EPHH control unit intended for control of the electromagnetic valve is used.
The control unit continuously controls the frequency of rotation of a bent shaft of the engine by measurement of the period of repetition of impulses of system of ignition which are removed from the coil of ignition and "4" blocks move on a conclusion.
With a frequency of rotation of a bent shaft less than 1140±5% min.-1 conclusions "1" and "2" blocks have electric communication, and at the same time current passes through a winding of the electromagnetic valve irrespective of the microswitch.
After increase in frequency of rotation to 1500±5% min.-1 electric communication of conclusions "1" and "2" is broken off and again is restored only after decrease in frequency of rotation of a bent shaft of the engine up to 1140 min.-1.