Purpose
Pressure control valve in TKVD (Y74) maintains pressure at the level set by the engine control unit (A53).
Accommodation
The pressure control valve in the TKVD is fastened with a thread in the rear end of the TKVD (see fig. VN 2.119 pos. 6 and 2),
Design
VN 2.126
1. High pressure fuel inlet
2. Holes for dumping fuel into the return line
3. Pressure control valve in TKVD (Y74)
Functioning
The principle of operation is shown in fig. VN 2.127.
VN 2.127
Pressure control valve in TKVD
Operating principle
1. Fuel inlet
2. Solenoid
A. The force developed by the solenoid
b. The force developed by the spring
With. Ball valve seat