Geely Emgrand X7. Manual part — 313

Section drawing of double row planetary gear mechanism

1

7

6

5

2

3

4

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1. Rear

sun

gear

2. Front

sun

gear

3. Long planet gear

4. Short

planetary

gear

5. Intermediate

support

6. Drive

gear

7. One-way

clutch

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Section figure of C1 clutch and intermediate shaft

4

3

2

5

1

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1. C1clutch

piston

2. C1 clutch spring

3. Intermediate

shaft

4. C1Outer gear hub of clutch

5. C1 clutch plate

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Section figure of torque converter

1

2

3

4

5

6

7

8

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1. Lock clutch lining plate

2. Lock

clutch

piston

3. Rear chamber of lock clutch

4. Single clutch rotor

5. Guide

wheel

6. Pump

wheel

7. Turbine

8. Torque converter cover

Hydraulic torque converter work principle

The torque converter contains a single-plate locking clutch. In any forward gear, control and realize the clutch
lockout. Move the transmission oil pressure in the hydraulic torque converter from one side of the clutch to the
other side thereof; apply the pressure to the other side to control the torque converter clutch. The torque converter
can transmit and increase the torque. The torque converter consists of three parts, including:

z Pump impeller

z Guide wheel

z Turbine

The hydraulic torque converter is rotated by the following modes:

z The pump impeller is directly driven by the engine to enable the transmission oil in the torque converter to

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flow.

z The transmission oil impacts the blades of the turbine, causing the change in the flowing direction of the

transmission oil.

z The transmission oil flows out of the turbine and into the center to impact the pulley and changes in the

flowing direction again here so as to enter the pump impeller.

z Torque reaction is caused by changing the direction of the guide wheel, so as to increase the torque that

reaches the turbine.

z The torque ratio between the worm and the pump pulley is called as the torque magnification times or torque

conversion coefficient, i.e., torque ratio.

z The greater the difference of the speed or revolution speed of impeller and the turbine is, the more the torque

increased is. When the turbine is static, the torque is increased maximum. With the increase of the speed of
the turbine wheel, the torque magnification value decreases gradually.

z When the turbine rotated at 85% speed, the torque conversion coefficient is 1, i.e., the torque on the turbine is

not greater than that on the impeller.

z A one-way clutch is used for preventing a starter from reversing; and the shaft in torque converter housing

can freely rotate in transmission oil to exceed the revolution speed of the one-way clutch. In the process of
torque conversion, the starter drives the bearing to rotate with respect to the housing in term of the one-way
clutch.

Hydraulic torque converter lock clutch:

The torque converter locking clutch is a device which can eliminate the mutual friction between the clutches
within the torque converter, so it has a function of helping reducing the fuel consumption rate.

The hydraulic torque converter lock clutch is allowed to do slipping control at the speed of slightly lower than the
normal speed of the engine, thereby improving the fuel economy.

The lock clutch of the hydraulic torque converter is engaged and released through the hydraulic control system.

The pressure on the hydraulic torque converter lock clutch piston depends on the electronic control pressure
release valve (VBS).

In any forward gear, control the lock clutch of the hydraulic torque converter to lock.

The pressure of the rear space of the piston of the hydraulic torque converter lock clutch is discharged; meanwhile,
the pressure of the liquid is extended from the turbine to the piston of the hydraulic torque converter lock clutch
and extrudes the hydraulic torque converter housing, thereby locking the clutch between the piston and the
housing and control at the normal temperature; moreover, the clutch grinds and transmits the torque to the
planetary gear train.

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