ABSTRACT
The data have been analysed in a simple way to give an overall idea o-f what efforts are necessary to work each primary control. To remove an abjection which some manufacturers might feel, as knowledge of the rough size of the control efforts was wanted, figures were only asked for to an accuracy of 20%. The lowest efforts are now required by most Fords, the smaller Mazdas and some Hyundais and Nissans. Unless they have very large pedal movements, the Volvos should require a small braking effort, but whereas they gave pedal forces: give pedal movements, so they cannot be placed. To normalise between cars which may have differing wheel and steering geometry, the amount of physical work to achieve a standard radius turn was computed. Mechanisms to assist in the operation of parking brakes are offerred having a highly non-linear characteristic, giving low leverage during the take-up of lost motion, and high leverage when the brakes bite.
