2006 GREAT WALL HOVER automatic transmission

Automatic transmission-31
Power transmission manual 1st-Gear
In manual 1st –Gear, the drive of transmission is send to the rear clutch cylinder through the input shaft. In this
condition, each function unit of transmission is shown as follows:
The clutch C2 is engaged through the 3-4 one-way clutch (OWC) to drive the front sun gear.
The engagement of B2 brake belt make the planetary gear carrier to stop.
The front sun gear drive the short planetary gear to rotate in anticlockwise.
The short planetary gear drive the long planetary gear to rotate in clockwise.
The long planetary gear rotate around its axial to drive the internal gear ring and output
shaft to rotate in clockwise to realize the movement in forward direction.
In overspeed, clutch C4 can provides certain brake force through 3-4 one-way clutch .
Control:
In stable status, the action of solenoid valve and valve is shown as follows:
The solenoid valve S1 and S2 is powered on.
In the action of pressure of line 500, the gear shift valve of 1-2, 2-3, 3-4 gear are kept in position of 1st-Gear.
The manual-operated valve transmission fluid (line pressure ) makes the clutch C2 to engagement.
LO-1st (line pressure) oil flows to the clutch C4 through the 1-2 Gear switching valve to engage the B2 brake belt.
Refer to Figure 5.3 and Table 5.4.
Table 5.4
The participating condition of each unit in manual 1st-Gear
Name of participated unit
X X

Automatic transmission-32
Figure 5.2 Reverse-Gear

Automatic transmission-33
Power transmission automatic 1st-Gear
In automatic 1st -Gear, the drive of transmission reaches the reaches the front clutch cylinder through the input shaft.
In this condition, the operating principle of each function unit of transmission is shown as follows:
The engagement of clutch C2 drives the front sun gear
The front sun gear drive the short planetary gear to rotate in anticlockwise.
The short planetary gear drives the long planetary gear to rotates in clockwise.
1-2 one-way clutch (OWC) stops the rotation of planetary gear carrier in counteracting force. At the same time, the long
planetary gear rotates around its axial to drive the ring gear and output shaft to rotate in clockwise to realize the forward
movement.
Control:
In stable status, the status of solenoid valve and valve is shown as follows:
Solenoid valve S1and S2 is powered on
In the action of line 500 pressure, the gear shift valve of 1-2, 2-3, 3-4 Gear is maintained in 1st-gear position.
The transmission drive oil (line pressure) from the manual-operated valve makes the engagement of clutch C2.
Table 5.5—participating condition of each unit in automatic 1st-Gear
Name of participation unit
Gear position
Automatic 1st-Gear
Refer to Figure 5.4and Table 5.5.

Automatic transmission-34
Figure 5
4 Automatic 1
st –Gear

Automatic transmission-35
Power transmission automatic 2nd-Gear and manual 2
In automatic 1st and manual 2nd-Gear, the drive of transmission reaches the front clutch cylinder through the input shaft. In this
condition, the operating principle of each functional unit of transmission is shown as follows:
The engagement of clutch C2 drives the forward central gear.
The forward central gear drives the short planetary gear to rotate in anticlockwise.
The short planetary gear drives the long planetary gear to rotate clockwise.
The engagement of brake belt B1 makes the stop of reverse central gear to make the long planetary gear rotates around the
reverse central gear, then make the internal gear and output shaft rotates in clockwise to make the vehicle moves forwardly.
The clutch C4 is engaged through the 3-4 one-way clutch (OWC) and provides the brake force of engine during overspeed.
Control:
In stable status, the status action of solenoid valve and valve is shown as follows:
The solenoid valve S1 is powered off ; The solenoid valve S2 is powered on.
The drive oil (line pressure) from the manual-operated valve makes the engagement of clutch C2.
When the solenoid valve S1 is powered off, the S1 oil pressure form line pressure 500 pushes the 3-4 Gear shifting valve
moves to left. At the same time, the S1 oil flows into the 1-2 Gear shifting valve to push the 1-2 Gear shifting valve to the
2
nd –Gear.
The line pressure oil from the 1-2 Gear shifting valve flows into the brake belt combination regulating valve, and 2-3 Gar
shifting valve.
The brake belt engagement regulator valve provides the 2nd-Gear oil (controlled by product of line pressure and valve rate)
to brake belt feed loop (BAF).
The brake belt engagement feed loop directly provides the oil to:
External engagement part of front servo piston.
1-2 Gear shifting valve can provide a oil drainage port when the transmission is shifted to 1st-Gear.
Use the 3-4 Gear shifting valve when the transmission is in 4
th-Gear position.
The drive force (line pressure) is sent to the clutch C4 through the 3-4 Gear shifting valve to realize the engagement of
clutch C4.
Refer to Figure 5.5 and table 5.6
Table 5.6The participating condition of each unit in automatic 2nd-Gear and manual 2nd-Gear
Automatic 2nd-Gear and manual
2
nd-Gear

Name of participation unit

Automatic transmission-36
Figure 5.5 Automatic 2
nd-Gear
manual 2
nd-Gear

Automatic transmission-37
power transmission Automatic 3rd-Gear and manual 3rd-Gear
In automatic and manual 3rd-Gear, the drive of transmission reaches the front cylinder through the input shaft. In this condition,
the operating principle of the transmission is shown as follows:
The engagement of clutch C2 drives the front sun gear
The engagement of clutch C1 drives the planetary gear carrier
The forward central gear and planetary gear carrier rotate in the same speed clockwise. So, there is not relative motion
between the forward central gear and planetary gear.
The gear ring and output shaft rotate in the speed of output shaft, and makes the moves forwardly.
The engagement of clutch C4 is through the 3-4 one-way clutch (OWC) and make the engine to provide the brake force
in overspeed.
Control:
In stable status, the status of solenoid valve and valve is shown as follows:
The solenoid valve S1 is powered off; Solenoid valve S2 is powered off
When the solenoid valve S1 and S2 is powered off, 2-3 and 3-4 shift valve are kept in 3rd-Gear position through the line
pressure 500.
1-2 Gear shifting valve is kept in 3rd-Gear position by the oil pressure of S1 and S2.
The (line pressure)oil form the 1-2 Gear shifting valve flows into the brake belt combination regulating valve directly and
flows into the 2-3 Gear shifting valve.
The brake belt combination regulating valve provides the 2nd-Gear oil (controlled by the product of line pressure and valve)
to the brake belt feed loop(BAF).
The brake belt feed loop directly provides the oil to:
External combination part of front servo
When the transmission is shifted to 1st-Gear, the 1-2 Gear shifting valve provides the oil drainage port.
When the transmission is in 4th –Gear position, it will use the 3-4 Gear shifting valve.
The 2nd-Gear oil of 2-3 Gear shifting valve flows into the 3rd-gear loop directly .
The 3rd-Gear oil from the 2-3 Gear shifting valve flows into the clutch combination regulating valve and sequence valve of
4-3 Gear directly.
The clutch combination regulating valve provides the oil of clutch attachment feed loop (controlled by the product of line
pressure of 500 and valve ratio) (CAF).
CAF directly provides the oil to :
clutch C1
Sequence valve of 4-3 Gear
In 4-3 Gear shifting valve, the CAF oil is changed to the release fluid of B1 (B1R-F), it cause the closing of brake belt 1
through the 3-4 Gear shifting valve to spring bottom of 4-3 gear sequence valve and release side of front servo.
The drive force (line pressure ) is sent to the clutch C4 through the 3-4 Gear shifting valve to engage the clutch C4 .
Refer to Figure 5.6 and Table 5.7.
Table 5.7
Table of participating condition of each unit in automatic and manual 3rd –Gear
Clutch
Name of participation unit
Automatic and manual
3
rd –Gear

Automatic transmission-38
Figure 5.6 Automatic 3
rd –Gear-manual 3
rd-gear