Chery B11. Manual — part 224

Chery·Maintenance Manual for Oriental Son

Automatic Transmission

R, UD, Second-gear and OD solenoid

alve

ol valve to realize

hen there is no power supply, the solenoid

alve is of a normally-open type.

/T-ECU controls the solenoid valve to

ndertake load cycles within the range of
% to 100%.

hen the solenoid valve is at the status of

%, all braking parts are engaged; when the

olenoid valve is at the status of 100%, all

raking parts are released.

ystem circuit:

ircuit operation: A/T controls the relay to

rovide system voltage to each solenoid
alve (Terminal 9 and 10).

hen it is on, each solenoid valve is off;

olenoid valve is on.

/T-ECU determines the on/off status of

ach solenoid valve according to the input

ata from the parking light switch,

utomobile speed sensor, input shaft sensor,

utput shaft sensor and A/T oil temperature

ensor, etc.

/T-ECU provides grounding to turn on

ach solenoid valve. The grounding time is

isplayed in the form of percentage on

UT-II.

he actuation of a solenoid valve will affect

e hydraulic pressure of the working parts

nd release parts of the gearbox.

ear-shifting control:

olenoid valve

ccording to INVECS-II, one special

olenoid valve controls the hydraulic

ressure of each clutch and brake so that the

ystem can directly carry out “clutch-to-

lutch” control during gear shifting.

Solenoid valve

L
v
Function:
LR, UD, second-gear and OD solenoid valve
can regulate the hydraulic pressure of their
respective pressure contr
gear shifting.

64

W
v
A
u
1
W
0
s
b



S
C
p
v
W
when it is off, each s
A
e
d
a
o
s
A
e
d
M
T
th
a

G
S
A
s
p
s
c

Gear

LR Second

gear

OD

DCC

(reference)

UD

First gear

Off

On

On

Off

Off

Second gear

On

Off

On

On

Off

Third gear

On

On

Off

On

Off

Fourth gear

On

Off

Off

On

On

Reverse gear

Off

On

On

Off

On

Overdrive solenoid

Low/reve e
solenoid valve

Underdrive

Second gear

Damp clutch
control solenoid

rs

l

Chery·Maintenance Manual for Oriental Son

Automatic Transmission

Gear-shifting mode control

e

s driving mode, INVECS-II optimizes

According to road surface situation and th
driver’
the gear-shifting mode.
Gear-up mode:

Gear-down mode:

节气门开度%

粗线：标准换档模式

r/mi

车速 km/h

输出轴转速

n

2→3 移动档
位范围

3→4 移动档
位范围

节气门开度%

粗线：标准换档模式

转速 r/min

车速 km/h

式

运动模式

输出轴

3

←4 移动

档位范围

2

←3 移动

档位范围

运动模

运动模式

65

Chery·Maintenance Manual for Oriental Son

Automatic Transmission

INVECS-II: automobiles equipped with MPI

r GDI engine

pplication: INVECS-II consists of two

o
A
parts.

eneral description: 1. Optimal overall

G
control provides the gear selection function

hich can satisfy the driver’s need in

arious road surface situations.
. Learning control system

w
v
2

can modify the

ming of gear shifting as per the driver’s

ehavior features and corrected input.

VECS-II computer programs according to

e manual gear shifting data by various

rivers subject to various road surface

ituations.

ptimal overall control

he computer receives the signals from

rottle position sensor, automobile speed

ng light switch during

to determine what

pted. Therefore,

es the optimal

n whatever road surface it

brake, this

g

e

ner

imultaneous and independent hydraulic

ontrol for each connected and isolated part.

lutch-on-clutch control:

can prevent interlocking and instantaneous

cing of the engine during gear shifting so
at the gear shifting can be more stable and

exible.

ti
b
IN
th
d
s
O
T
th
sensor and parki
automobile traveling
driving mode shall be ado

ays provid

INVECS-II alw
gear selection o
may be.

Learning control system:
As the optimal gear-shifting timing changes
depending on driving behaviors, driving
ability and differences between various
drivers, INVECS-II is equipped with one
learning control system.
According to the output power of the engine,

operation of

wheel load and the
system makes an assessment of the driver’s
driving mode.
The learning control system modifies the
gear-shifting timing according to the
assessment results to best suit the drivin
behaviors and habits of the driver.
It is easy to shift to high-speed gear while
the automobile is traveling at a low speed;
and it feels good and exciting to shift to
high-speed gear while the automobile is
traveling at a high speed.
If the driver frequently steps on the brak
pedal on a downgrade, the computer will
shift it to low-speed gear in a timely man
to provide for engine braking.

Hydraulic control during gear shifting:
During gear shifting, F4A4 automatic

ansmission driving axle series provides

tr
s
c

C
It
ra
th
fl

Preprogram
med manual
shift data

Select

best

Deci

Optimal

contorl

Throttle

Speed

Parking

Steering

Road and
driver
condition

Evaluati
on on
driver’s
behavior

Best
gear
suita
ble
for
the

Engine

Wheel

Parking

Steering

Learning

加 速 时 对 学 习 的 影 响

平 稳 型 驾 驶 员

敏 捷 型 驾 驶 员

车 速

下坡时对学习的影响
常使用制动踏板的驾驶员

常踏油门踏板的驾驶员

66

Chery·Maintenance Manual for Oriental Son

Automatic Transmission

Feedback control and learning control

挡：Gear down

时间：Time

Integrated engine/gearbox control:

engine

ue

e; engine ECU gives a

edback through delayed ignition. A/T-

CU determines the appropriate hydraulic

ressure applied onto the clutch and brake
uring gear shifting according to the input

ir quantity data from the engine ECU.

升挡：Gear up
降
涡轮转速：Turbo speed
目标：Target

Feedback control:
During each gear shifting, the feedback
control function will regulate the hydraulic
pressure so that the rotation speed changes
of gearbox input shaft complies with the
target mode. This function can provide the
optimal driving axle torque changes and
increase gear-shifting quality.
Learning control:
The learning control function can adjust the
oil pressure to realize the optimal gear-
shifting result according to previous gear-
shifting experience.

The ECU and A/T-ECU of the
transmits and receives necessary data for
control. These data are transmitted and
received through serial communication
cables. When shifting to high-speed gear,
A/T-ECU gives out a signal for torq
reduction to the engin
fe
E
p
d
a

时间

涡轮转速

升档

涡轮转速

目标

降档

涡轮转速

目标

时间

涡轮转速

67