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AUTOMATIC SPEED CONTROL (CRUISE)
OPERATION OF THE ACUTATOR
Y27EEOA
Pinion gear
Variable vollage
position sensor
Rack gear
Final drive gear
Clutch plate
Electromagnetic
clutch coil gear
Clutch electrical
contacts
D.C. motor
Speed reduction gears
1.
When the vehicle reaches the specified speed, with the CRUISE switch at the ON position and the SET/COAST,
switch is momentarily set to the ON position, the control unit causes current to flow to the actuator's electro-
magnetic clutch coil. The clutch plate is then attached, and at the same time, the path from the ECU to the·
D.C. motor becomes conductive and the D.C. motor begins to rotate at high speed.
2.
As shown in the figure above, the rotation of the D.C. motor is transmitted to the speed reduction gears -
electromagnetic clutch coil gear -
final drive gear -
pinion gear -
rack gear.
3.
The selection of the direction (PULL or RELEASE) of the rack gear is performed by the reversal of the direction
of conductivity to the motor and this is automatically controlled by the ECU.
4.
When the driver switches OFF the CRUISE switch, or switches ON the cancel switch, thus canceling the ASC
system, conductivity to the electromagnetic clutch is interrupted.
5.
As a result of the interruption of the conductivity to the electromagnetic clutch, the clutch plate is returned
from the electromagnetic clutch side to its normal position.
6.
When the clutch plate is free from the electromagnetic clutch coil gear, the rack gear is free to return to its
normal extended position.
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