13:15. System of maintenance of constant speed of the movement (cruise control)

Fig. 13.58. Arrangement of basic elements of system of maintenance of constant speed of the movement (cruise control): and – models with the block of switches; b – models without block of switches; 1 – switch; 2 – the switch on a brake pedal; 3 – safety switch (automatic); 4 – drive of a butterfly valve; 5 – the switch on a coupling pedal; 6 – control unit; 7 – main switch


The system allows to support the constant speed of the movement of the car irrespective of an inclination of the road and other factors, at the same time the driver does not need to press an accelerator pedal. Basic elements of system are shown in fig. 13.58.

Fig. 13.59. Check of a free wheeling of a cable of control of the drive of system of maintenance of constant speed of the movement


At detection of malfunctions in system check the corresponding safety lock, connection of a vacuum hose of the drive and its state, adjustment of a cable of control of the drive. The free wheeling of a cable of control of the drive in the switched-off situation has to make 10–30 mm (fig. 13.59).
On cars with the mechanical transmission the switch on a pedal of coupling switches off system of automatic control of speed of the movement when pressing a coupling pedal. If you need to replace the switch, do not forget that height of installation of a pedal of coupling depends on it. Turn the switch so that pedals of coupling and a brake were at one level then record it a lock-nut.
Any other malfunction in system of automatic maintenance of speed of the movement should be eliminated in auto repair shop.