The B1 (7) pressure acting on the end face of the
shift pressure shift valve (3) is replaced by the work-
ing pressure (p-A). The rising shift pressure (p-S) at
clutch K1 (6) acts on the annular face of the overlap
regulating valve (2) and reduces the overlap pressure
regulated by the overlap regulating valve (2). When a
corresponding pressure level is reached at the hold-
ing pressure shift valve (4), this valve switches over.
Second Gear Engaged
After the gearchange is complete, the pressure on
the end face of the command valve (5) (Fig. 16) is
reduced via the 1-2 and 4-5 shift solenoid valve (1),
and the command valve (5) is pushed back to its
basic position. Via the holding pressure shift valve
(4) the working pressure (p-A) now passes via the
command valve (5) to clutch K1 (6). The multiple-disc
holding clutch B1 (7) is deactivated (unpressurized).
The spring of the shift pressure shift valve (3) pushes
the valve back to its basic position.
Fig. 16 Second Gear Engaged
1 - 1-2/4-5 SHIFT SOLENOID 5 - 1-2/4-5 COMMAND VALVE
2 - 1-2/4-5 OVERLAP VALVE 6 - DRIVING CLUTCH K1
3 - 1-2/4-5 SHIFT PRESSURE SHIFT VALVE 7 - HOLDING CLUTCH B1
4 - 1-2/4-5 HOLDING PRESSURE SHIFT VALVE
VA AUTOMATIC TRANSMISSION - NAG1 21 - 19
AUTOMATIC TRANSMISSION - NAG1 (Continued)
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