Great Wall Hover. Manual - part 21

Automatic transmission-15

Figure 3.6

Hydraulic control circulation flow

Automatic transmission-16

Figure 3.9 manual-operated valve 3.

1-2 shift valve  (refer to Figure 3.10) has two position status. It must be in the position (2, 3, 4) for the convenience of raising
gear in 1

st

-Gear. It is using for all 1-2 and 2-1 shift.

Through the power supply of S1 and (or ) S2, the 1-2 shift valve can acquire its On/Off status.
During 1-2 shift period, drive the transmission fluid from manual-operated valve to the 2

nd

-Gear loop. During the shifting form

2 to 1, the brake belt is engaged and drain the oil through the 1-2 Gear shift valve.
When in 1

st

-gear position, the 1-2 gear shift valve operates with the 3-4gear shift valve (described as follows) combinedly to

separate the clutch C4; if in 2

nd

-Gear position, engage the clutch C4. When select the manual Gear-1, the clutch C4 engages with

the rear brake belt  (B2).

3

1-2 shift valve

Automatic transmission-17

Figure 3.10  1-2 gear shift valve

Clutch combination regulating valve (refer to Figure 3.15) is a constant ratio regulating valve which provide the regulating pressure
of clutch C1 to control the change ratio of shifting quality clutch status. The ratio is about 2.25:1.
When the S3 is opened, the oil of 3

rd

-Gear is provided to the valve and adjust the pressure (CAF) to 2.25 times of S5 signal

pressure. When S3 is in closed status, the output pressure is 2.25 times of pressure of line 500.

9. Clutch combination regulating valve

Automatic transmission-18

Figure 3.11   2-3gear shift valve

Figure 3.12   3-4gear shift valve

Figure 3.13   4-3sequence valve

Figure 3.14   Electromagnetic pressure regulating valve and line pressure impelling valve