Chery A11. Manual — part 107

CHERY AUTOMOBILE CO., LTD Automatic Transmission Fault Diagnosis Manual

175

Centrifugal governor

The centrifugal governor is installed on and rotates along with the driven shaft. The governor is

used to produce the oil pressure on the governor to provide an oil pressure varying with the vehicle

speed for the control system.

Three-level governor

Condition I.

The oil pressure provided by the main oil circuit from position 3-2 valve to position 1 valve does

not change. The valve rotates together with the driven shaft. The slide valve and centrifugal block

moves outwards under the centrifugal force and opens the oil inlet. Thus, the pressure of the main

oil circuit comes into the governor to cause oil pressure on the governor. Meanwhile, the governor’s

oil pressure acts on the slide valve and closes the oil inlet somewhat until the oil pressure of the

governor is balanced with the centrifugal force on the slide valve.

Condition II.

Since the centrifugal block integrated with the slide valve in the governor has a greater mass and

centrifugal force and along with an increased vehicle speed, the oil pressure on the governor that is

balanced with the centrifugal force is also increased dramatically until the centrifugal block stops to

move outwards.

Condition III.

When the centrifugal block stops to move outwards, the slide valve could not move outwards under

its own centrifugal force. Due to the slide valve’s small mass, its centrifugal force increases slowly

along the RPM changes. Hence, the oil pressure of the governor that is balanced with it also

changes little.

The governor’s oil pressure changes along with the vehicle speed’s changes so that
the oil pressure on oil circuit in each control element also changes. Then automatic
shift is realized by the throttle oil pressure.

Content

Part 1 Motorola Multi-port electric fuel injection motor system

1、system description. . . . . . . . . . . 1

2、operation. . . . . . . . . . . . …2

3、fuel injection system using and servicing. . . . . . …10

4、fuel injection system fault and repairing. . . . . . …12

5、ECU circuit. . . . . . . . . . . …17

6、engine circuit. . . . . . . . . . . . 18

7、electric injection theory diagram. . . . . . . . …19

8、ECU pin definition. . . . . . . . . . . 21

Part 2 M&M Multi-port electric injection engine systems

1、system description. . . . . . . . . . . 23

2、operation. . . . . . . . . . . . . 23

3、fuel injection system control strategy. . . . . . . …24

4、structure. . . . . . . . . . . . . 25

5、electric fuel injection system service. . . . . . . …34

6、electric fuel injection system fault and trouble shooting. . . . 36

Appendix 1. ECU wiring diagram and pin definition. . . . …38

Appendix 2. electrical component character parameter. . . . …40

Preface

MOT and M&M multi-port motors are applied in CHERY cars, and the detailed

matching and establishment rules are as follows

Electric

injection type

Motor model

No.

Gear

box

type

Ex factory No.

MOT SQR480EB

MT

“SQR480EB*EB××

×××××”

MOT SQR480EC

AT

“SQR480EC*EC××

×××××”

M&M SQR480ED

MT

“SQR480ED*ED××

×××××”

Note: due to the difference between MOT and M&M systems, every maintenance point

should pay attention to the difference when repair them.

P

art 1 Motorola Multi-port electric injection motor system

FOREWARD

Either MOT or M & M multi-port fuel injection system is installed on

Chery sedan with following differences:

EI Engine

Transmission

Factory

Number

MOT

SQR

480EB

MT SQR480EB*EB×××××××

MOT

SQR

480EC

AT SQR480EC*EC×××××××

M&M

SQR

480ED

MT SQR480ED*ED×××××××

Note: MOT and M & M are two different systems, and understand which

system is installed when servicing.