Geely JL481Q, Manual

Page: 190 / 198

Table 24
Table 25
Max
+125
typical Min
-40
Max
58.3
95(+125 C)
40.2
12.0
14.0
Ω
Ω
mH
V
V
degree
KPa
N
typical
53
33.5
15
60
6.28
Min
47.7
35
(-40 C)
26.8
7.5
3.5
Max allowable number of stepper motor plug contact
each coil resistance at 25C
each coil resistance at the operating temperature.
1000Hz induction for each coil at 25C
Normal operating voltage
Possible operating voltage
Step length of stepper motor stator
Two terminals differential pressure when the bypass channel is open
Max Axial force caused by gas differential pressure
operating temperature
parameter
Value
Value
parameter
Stepper motor
Throttle bypass section
2.0 x 10
6
Unit
Unit
C
once
Ultimate Data
Performance Data
Fig.368
Stepper motor actually is a micro motor. The steel stator is a multiphase coil winding and the rotor is a permanent magnet.
When electrifying stator coil, the permanent magnetism stator will rotate towards corresponding direction on the impact of
the electromagnetic power. Since stator and helix shaft are screw thread contact, stator’s angular rotation will transform
into helix shaft’s rectilinear motion. While stator rotates a fixed angle, helix shaft will move some displacement, which is
one step whose step length is 15
o
ECU controls stepper motor move direction and steps by changing positive polarity
ǃ
negative polarity and quantity of coil
power on phase, then changing engine throttle body bypass section area, so as to acquire the corresponding bypass air
flow at idle condition.
Attention for mounting
Idle actuator with stepper motor is mounted on the throttle body to form bypass channel on two sides of throttle. See
Fig.368
186