Page 330 - 05. Subyek Teknik Mesin - Automobile Mechanical and Electrical Systems Automotive Technology Vehicle Maintenance and Repair (Vehicle Maintenance Repr Nv2) by Tom Denton

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312 Automobile mechanical and electrical systems

Figure 3.111 Road speed sensor in position

Figure 3.112 Headway sensor. (Source: Bosch Media)

cannot be achieved by just backing off the throttle, a warning is supplied to the
Key fact driver. The more complex system can take control of the vehicle transmission
The operation of an adaptive cruise and brakes. It is important to note that adaptive cruise control is designed to
system is similar to a conventional relieve the burden on the driver, not take full control of the vehicle!
system except that when a headway
sensor detects an obstruction, the
vehicle speed is decreased. 3.4.5 Seats, mirrors, sunroofs, locking and
windows

3.4.5.1 Seat adjustment
Electrical movement of seats, mirrors ( Fig. 3.113 ) and the sunroof is included
in one area as the operation of each system is quite similar. The operation of
electric windows and central door locking is also much the same. Fundamentally,
all the systems discussed in this topic operate using one or several permanent
magnet motors, together with a supply reversing circuit.
A typical motor reverse circuit is shown in Fig. 3.114 . When the switch is moved,
one of the relays operates and changes the polarity to one side of the motor. If